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-rw-r--r--Documentation/devicetree/bindings/memory-controllers/nvidia,tegra-mc.txt84
-rw-r--r--Documentation/devicetree/bindings/memory-controllers/tegra-emc.txt374
-rw-r--r--drivers/memory/tegra/Kconfig10
-rw-r--r--drivers/memory/tegra/Makefile2
-rw-r--r--drivers/memory/tegra/mc.c136
-rw-r--r--drivers/memory/tegra/tegra124-emc.c1140
-rw-r--r--drivers/memory/tegra/tegra124.c44
-rw-r--r--include/soc/tegra/emc.h19
-rw-r--r--include/soc/tegra/mc.h14
9 files changed, 1820 insertions, 3 deletions
diff --git a/Documentation/devicetree/bindings/memory-controllers/nvidia,tegra-mc.txt b/Documentation/devicetree/bindings/memory-controllers/nvidia,tegra-mc.txt
index f3db93c85eea..3338a2834ad7 100644
--- a/Documentation/devicetree/bindings/memory-controllers/nvidia,tegra-mc.txt
+++ b/Documentation/devicetree/bindings/memory-controllers/nvidia,tegra-mc.txt
@@ -1,6 +1,9 @@
NVIDIA Tegra Memory Controller device tree bindings
===================================================
+memory-controller node
+----------------------
+
Required properties:
- compatible: Should be "nvidia,tegra<chip>-mc"
- reg: Physical base address and length of the controller's registers.
@@ -15,9 +18,49 @@ Required properties:
This device implements an IOMMU that complies with the generic IOMMU binding.
See ../iommu/iommu.txt for details.
-Example:
---------
+emc-timings subnode
+-------------------
+
+The node should contain a "emc-timings" subnode for each supported RAM type (see field RAM_CODE in
+register PMC_STRAPPING_OPT_A).
+
+Required properties for "emc-timings" nodes :
+- nvidia,ram-code : Should contain the value of RAM_CODE this timing set is used for.
+
+timing subnode
+--------------
+
+Each "emc-timings" node should contain a subnode for every supported EMC clock rate.
+
+Required properties for timing nodes :
+- clock-frequency : Should contain the memory clock rate in Hz.
+- nvidia,emem-configuration : Values to be written to the EMEM register block. For the Tegra124 SoC
+(see section "15.6.1 MC Registers" in the TRM), these are the registers whose values need to be
+specified, according to the board documentation:
+
+ MC_EMEM_ARB_CFG
+ MC_EMEM_ARB_OUTSTANDING_REQ
+ MC_EMEM_ARB_TIMING_RCD
+ MC_EMEM_ARB_TIMING_RP
+ MC_EMEM_ARB_TIMING_RC
+ MC_EMEM_ARB_TIMING_RAS
+ MC_EMEM_ARB_TIMING_FAW
+ MC_EMEM_ARB_TIMING_RRD
+ MC_EMEM_ARB_TIMING_RAP2PRE
+ MC_EMEM_ARB_TIMING_WAP2PRE
+ MC_EMEM_ARB_TIMING_R2R
+ MC_EMEM_ARB_TIMING_W2W
+ MC_EMEM_ARB_TIMING_R2W
+ MC_EMEM_ARB_TIMING_W2R
+ MC_EMEM_ARB_DA_TURNS
+ MC_EMEM_ARB_DA_COVERS
+ MC_EMEM_ARB_MISC0
+ MC_EMEM_ARB_MISC1
+ MC_EMEM_ARB_RING1_THROTTLE
+Example SoC include file:
+
+/ {
mc: memory-controller@0,70019000 {
compatible = "nvidia,tegra124-mc";
reg = <0x0 0x70019000 0x0 0x1000>;
@@ -34,3 +77,40 @@ Example:
...
iommus = <&mc TEGRA_SWGROUP_SDMMC1A>;
};
+};
+
+Example board file:
+
+/ {
+ memory-controller@0,70019000 {
+ emc-timings-3 {
+ nvidia,ram-code = <3>;
+
+ timing-12750000 {
+ clock-frequency = <12750000>;
+
+ nvidia,emem-configuration = <
+ 0x40040001 /* MC_EMEM_ARB_CFG */
+ 0x8000000a /* MC_EMEM_ARB_OUTSTANDING_REQ */
+ 0x00000001 /* MC_EMEM_ARB_TIMING_RCD */
+ 0x00000001 /* MC_EMEM_ARB_TIMING_RP */
+ 0x00000002 /* MC_EMEM_ARB_TIMING_RC */
+ 0x00000000 /* MC_EMEM_ARB_TIMING_RAS */
+ 0x00000002 /* MC_EMEM_ARB_TIMING_FAW */
+ 0x00000001 /* MC_EMEM_ARB_TIMING_RRD */
+ 0x00000002 /* MC_EMEM_ARB_TIMING_RAP2PRE */
+ 0x00000008 /* MC_EMEM_ARB_TIMING_WAP2PRE */
+ 0x00000003 /* MC_EMEM_ARB_TIMING_R2R */
+ 0x00000002 /* MC_EMEM_ARB_TIMING_W2W */
+ 0x00000003 /* MC_EMEM_ARB_TIMING_R2W */
+ 0x00000006 /* MC_EMEM_ARB_TIMING_W2R */
+ 0x06030203 /* MC_EMEM_ARB_DA_TURNS */
+ 0x000a0402 /* MC_EMEM_ARB_DA_COVERS */
+ 0x77e30303 /* MC_EMEM_ARB_MISC0 */
+ 0x70000f03 /* MC_EMEM_ARB_MISC1 */
+ 0x001f0000 /* MC_EMEM_ARB_RING1_THROTTLE */
+ >;
+ };
+ };
+ };
+};
diff --git a/Documentation/devicetree/bindings/memory-controllers/tegra-emc.txt b/Documentation/devicetree/bindings/memory-controllers/tegra-emc.txt
new file mode 100644
index 000000000000..b59c625d6336
--- /dev/null
+++ b/Documentation/devicetree/bindings/memory-controllers/tegra-emc.txt
@@ -0,0 +1,374 @@
+NVIDIA Tegra124 SoC EMC (external memory controller)
+====================================================
+
+Required properties :
+- compatible : Should be "nvidia,tegra124-emc".
+- reg : physical base address and length of the controller's registers.
+- nvidia,memory-controller : phandle of the MC driver.
+
+The node should contain a "emc-timings" subnode for each supported RAM type
+(see field RAM_CODE in register PMC_STRAPPING_OPT_A), with its unit address
+being its RAM_CODE.
+
+Required properties for "emc-timings" nodes :
+- nvidia,ram-code : Should contain the value of RAM_CODE this timing set is
+used for.
+
+Each "emc-timings" node should contain a "timing" subnode for every supported
+EMC clock rate. The "timing" subnodes should have the clock rate in Hz as
+their unit address.
+
+Required properties for "timing" nodes :
+- clock-frequency : Should contain the memory clock rate in Hz.
+- The following properties contain EMC timing characterization values
+(specified in the board documentation) :
+ - nvidia,emc-auto-cal-config : EMC_AUTO_CAL_CONFIG
+ - nvidia,emc-auto-cal-config2 : EMC_AUTO_CAL_CONFIG2
+ - nvidia,emc-auto-cal-config3 : EMC_AUTO_CAL_CONFIG3
+ - nvidia,emc-auto-cal-interval : EMC_AUTO_CAL_INTERVAL
+ - nvidia,emc-bgbias-ctl0 : EMC_BGBIAS_CTL0
+ - nvidia,emc-cfg : EMC_CFG
+ - nvidia,emc-cfg-2 : EMC_CFG_2
+ - nvidia,emc-ctt-term-ctrl : EMC_CTT_TERM_CTRL
+ - nvidia,emc-mode-1 : Mode Register 1
+ - nvidia,emc-mode-2 : Mode Register 2
+ - nvidia,emc-mode-4 : Mode Register 4
+ - nvidia,emc-mode-reset : Mode Register 0
+ - nvidia,emc-mrs-wait-cnt : EMC_MRS_WAIT_CNT
+ - nvidia,emc-sel-dpd-ctrl : EMC_SEL_DPD_CTRL
+ - nvidia,emc-xm2dqspadctrl2 : EMC_XM2DQSPADCTRL2
+ - nvidia,emc-zcal-cnt-long : EMC_ZCAL_WAIT_CNT after clock change
+ - nvidia,emc-zcal-interval : EMC_ZCAL_INTERVAL
+- nvidia,emc-configuration : EMC timing characterization data. These are the
+registers (see section "15.6.2 EMC Registers" in the TRM) whose values need to
+be specified, according to the board documentation:
+
+ EMC_RC
+ EMC_RFC
+ EMC_RFC_SLR
+ EMC_RAS
+ EMC_RP
+ EMC_R2W
+ EMC_W2R
+ EMC_R2P
+ EMC_W2P
+ EMC_RD_RCD
+ EMC_WR_RCD
+ EMC_RRD
+ EMC_REXT
+ EMC_WEXT
+ EMC_WDV
+ EMC_WDV_MASK
+ EMC_QUSE
+ EMC_QUSE_WIDTH
+ EMC_IBDLY
+ EMC_EINPUT
+ EMC_EINPUT_DURATION
+ EMC_PUTERM_EXTRA
+ EMC_PUTERM_WIDTH
+ EMC_PUTERM_ADJ
+ EMC_CDB_CNTL_1
+ EMC_CDB_CNTL_2
+ EMC_CDB_CNTL_3
+ EMC_QRST
+ EMC_QSAFE
+ EMC_RDV
+ EMC_RDV_MASK
+ EMC_REFRESH
+ EMC_BURST_REFRESH_NUM
+ EMC_PRE_REFRESH_REQ_CNT
+ EMC_PDEX2WR
+ EMC_PDEX2RD
+ EMC_PCHG2PDEN
+ EMC_ACT2PDEN
+ EMC_AR2PDEN
+ EMC_RW2PDEN
+ EMC_TXSR
+ EMC_TXSRDLL
+ EMC_TCKE
+ EMC_TCKESR
+ EMC_TPD
+ EMC_TFAW
+ EMC_TRPAB
+ EMC_TCLKSTABLE
+ EMC_TCLKSTOP
+ EMC_TREFBW
+ EMC_FBIO_CFG6
+ EMC_ODT_WRITE
+ EMC_ODT_READ
+ EMC_FBIO_CFG5
+ EMC_CFG_DIG_DLL
+ EMC_CFG_DIG_DLL_PERIOD
+ EMC_DLL_XFORM_DQS0
+ EMC_DLL_XFORM_DQS1
+ EMC_DLL_XFORM_DQS2
+ EMC_DLL_XFORM_DQS3
+ EMC_DLL_XFORM_DQS4
+ EMC_DLL_XFORM_DQS5
+ EMC_DLL_XFORM_DQS6
+ EMC_DLL_XFORM_DQS7
+ EMC_DLL_XFORM_DQS8
+ EMC_DLL_XFORM_DQS9
+ EMC_DLL_XFORM_DQS10
+ EMC_DLL_XFORM_DQS11
+ EMC_DLL_XFORM_DQS12
+ EMC_DLL_XFORM_DQS13
+ EMC_DLL_XFORM_DQS14
+ EMC_DLL_XFORM_DQS15
+ EMC_DLL_XFORM_QUSE0
+ EMC_DLL_XFORM_QUSE1
+ EMC_DLL_XFORM_QUSE2
+ EMC_DLL_XFORM_QUSE3
+ EMC_DLL_XFORM_QUSE4
+ EMC_DLL_XFORM_QUSE5
+ EMC_DLL_XFORM_QUSE6
+ EMC_DLL_XFORM_QUSE7
+ EMC_DLL_XFORM_ADDR0
+ EMC_DLL_XFORM_ADDR1
+ EMC_DLL_XFORM_ADDR2
+ EMC_DLL_XFORM_ADDR3
+ EMC_DLL_XFORM_ADDR4
+ EMC_DLL_XFORM_ADDR5
+ EMC_DLL_XFORM_QUSE8
+ EMC_DLL_XFORM_QUSE9
+ EMC_DLL_XFORM_QUSE10
+ EMC_DLL_XFORM_QUSE11
+ EMC_DLL_XFORM_QUSE12
+ EMC_DLL_XFORM_QUSE13
+ EMC_DLL_XFORM_QUSE14
+ EMC_DLL_XFORM_QUSE15
+ EMC_DLI_TRIM_TXDQS0
+ EMC_DLI_TRIM_TXDQS1
+ EMC_DLI_TRIM_TXDQS2
+ EMC_DLI_TRIM_TXDQS3
+ EMC_DLI_TRIM_TXDQS4
+ EMC_DLI_TRIM_TXDQS5
+ EMC_DLI_TRIM_TXDQS6
+ EMC_DLI_TRIM_TXDQS7
+ EMC_DLI_TRIM_TXDQS8
+ EMC_DLI_TRIM_TXDQS9
+ EMC_DLI_TRIM_TXDQS10
+ EMC_DLI_TRIM_TXDQS11
+ EMC_DLI_TRIM_TXDQS12
+ EMC_DLI_TRIM_TXDQS13
+ EMC_DLI_TRIM_TXDQS14
+ EMC_DLI_TRIM_TXDQS15
+ EMC_DLL_XFORM_DQ0
+ EMC_DLL_XFORM_DQ1
+ EMC_DLL_XFORM_DQ2
+ EMC_DLL_XFORM_DQ3
+ EMC_DLL_XFORM_DQ4
+ EMC_DLL_XFORM_DQ5
+ EMC_DLL_XFORM_DQ6
+ EMC_DLL_XFORM_DQ7
+ EMC_XM2CMDPADCTRL
+ EMC_XM2CMDPADCTRL4
+ EMC_XM2CMDPADCTRL5
+ EMC_XM2DQPADCTRL2
+ EMC_XM2DQPADCTRL3
+ EMC_XM2CLKPADCTRL
+ EMC_XM2CLKPADCTRL2
+ EMC_XM2COMPPADCTRL
+ EMC_XM2VTTGENPADCTRL
+ EMC_XM2VTTGENPADCTRL2
+ EMC_XM2VTTGENPADCTRL3
+ EMC_XM2DQSPADCTRL3
+ EMC_XM2DQSPADCTRL4
+ EMC_XM2DQSPADCTRL5
+ EMC_XM2DQSPADCTRL6
+ EMC_DSR_VTTGEN_DRV
+ EMC_TXDSRVTTGEN
+ EMC_FBIO_SPARE
+ EMC_ZCAL_WAIT_CNT
+ EMC_MRS_WAIT_CNT2
+ EMC_CTT
+ EMC_CTT_DURATION
+ EMC_CFG_PIPE
+ EMC_DYN_SELF_REF_CONTROL
+ EMC_QPOP
+
+Example SoC include file:
+
+/ {
+ emc@0,7001b000 {
+ compatible = "nvidia,tegra124-emc";
+ reg = <0x0 0x7001b000 0x0 0x1000>;
+
+ nvidia,memory-controller = <&mc>;
+ };
+};
+
+Example board file:
+
+/ {
+ emc@0,7001b000 {
+ emc-timings-3 {
+ nvidia,ram-code = <3>;
+
+ timing-12750000 {
+ clock-frequency = <12750000>;
+
+ nvidia,emc-zcal-cnt-long = <0x00000042>;
+ nvidia,emc-auto-cal-interval = <0x001fffff>;
+ nvidia,emc-ctt-term-ctrl = <0x00000802>;
+ nvidia,emc-cfg = <0x73240000>;
+ nvidia,emc-cfg-2 = <0x000008c5>;
+ nvidia,emc-sel-dpd-ctrl = <0x00040128>;
+ nvidia,emc-bgbias-ctl0 = <0x00000008>;
+ nvidia,emc-auto-cal-config = <0xa1430000>;
+ nvidia,emc-auto-cal-config2 = <0x00000000>;
+ nvidia,emc-auto-cal-config3 = <0x00000000>;
+ nvidia,emc-mode-reset = <0x80001221>;
+ nvidia,emc-mode-1 = <0x80100003>;
+ nvidia,emc-mode-2 = <0x80200008>;
+ nvidia,emc-mode-4 = <0x00000000>;
+
+ nvidia,emc-configuration = <
+ 0x00000000 /* EMC_RC */
+ 0x00000003 /* EMC_RFC */
+ 0x00000000 /* EMC_RFC_SLR */
+ 0x00000000 /* EMC_RAS */
+ 0x00000000 /* EMC_RP */
+ 0x00000004 /* EMC_R2W */
+ 0x0000000a /* EMC_W2R */
+ 0x00000003 /* EMC_R2P */
+ 0x0000000b /* EMC_W2P */
+ 0x00000000 /* EMC_RD_RCD */
+ 0x00000000 /* EMC_WR_RCD */
+ 0x00000003 /* EMC_RRD */
+ 0x00000003 /* EMC_REXT */
+ 0x00000000 /* EMC_WEXT */
+ 0x00000006 /* EMC_WDV */
+ 0x00000006 /* EMC_WDV_MASK */
+ 0x00000006 /* EMC_QUSE */
+ 0x00000002 /* EMC_QUSE_WIDTH */
+ 0x00000000 /* EMC_IBDLY */
+ 0x00000005 /* EMC_EINPUT */
+ 0x00000005 /* EMC_EINPUT_DURATION */
+ 0x00010000 /* EMC_PUTERM_EXTRA */
+ 0x00000003 /* EMC_PUTERM_WIDTH */
+ 0x00000000 /* EMC_PUTERM_ADJ */
+ 0x00000000 /* EMC_CDB_CNTL_1 */
+ 0x00000000 /* EMC_CDB_CNTL_2 */
+ 0x00000000 /* EMC_CDB_CNTL_3 */
+ 0x00000004 /* EMC_QRST */
+ 0x0000000c /* EMC_QSAFE */
+ 0x0000000d /* EMC_RDV */
+ 0x0000000f /* EMC_RDV_MASK */
+ 0x00000060 /* EMC_REFRESH */
+ 0x00000000 /* EMC_BURST_REFRESH_NUM */
+ 0x00000018 /* EMC_PRE_REFRESH_REQ_CNT */
+ 0x00000002 /* EMC_PDEX2WR */
+ 0x00000002 /* EMC_PDEX2RD */
+ 0x00000001 /* EMC_PCHG2PDEN */
+ 0x00000000 /* EMC_ACT2PDEN */
+ 0x00000007 /* EMC_AR2PDEN */
+ 0x0000000f /* EMC_RW2PDEN */
+ 0x00000005 /* EMC_TXSR */
+ 0x00000005 /* EMC_TXSRDLL */
+ 0x00000004 /* EMC_TCKE */
+ 0x00000005 /* EMC_TCKESR */
+ 0x00000004 /* EMC_TPD */
+ 0x00000000 /* EMC_TFAW */
+ 0x00000000 /* EMC_TRPAB */
+ 0x00000005 /* EMC_TCLKSTABLE */
+ 0x00000005 /* EMC_TCLKSTOP */
+ 0x00000064 /* EMC_TREFBW */
+ 0x00000000 /* EMC_FBIO_CFG6 */
+ 0x00000000 /* EMC_ODT_WRITE */
+ 0x00000000 /* EMC_ODT_READ */
+ 0x106aa298 /* EMC_FBIO_CFG5 */
+ 0x002c00a0 /* EMC_CFG_DIG_DLL */
+ 0x00008000 /* EMC_CFG_DIG_DLL_PERIOD */
+ 0x00064000 /* EMC_DLL_XFORM_DQS0 */
+ 0x00064000 /* EMC_DLL_XFORM_DQS1 */
+ 0x00064000 /* EMC_DLL_XFORM_DQS2 */
+ 0x00064000 /* EMC_DLL_XFORM_DQS3 */
+ 0x00064000 /* EMC_DLL_XFORM_DQS4 */
+ 0x00064000 /* EMC_DLL_XFORM_DQS5 */
+ 0x00064000 /* EMC_DLL_XFORM_DQS6 */
+ 0x00064000 /* EMC_DLL_XFORM_DQS7 */
+ 0x00064000 /* EMC_DLL_XFORM_DQS8 */
+ 0x00064000 /* EMC_DLL_XFORM_DQS9 */
+ 0x00064000 /* EMC_DLL_XFORM_DQS10 */
+ 0x00064000 /* EMC_DLL_XFORM_DQS11 */
+ 0x00064000 /* EMC_DLL_XFORM_DQS12 */
+ 0x00064000 /* EMC_DLL_XFORM_DQS13 */
+ 0x00064000 /* EMC_DLL_XFORM_DQS14 */
+ 0x00064000 /* EMC_DLL_XFORM_DQS15 */
+ 0x00000000 /* EMC_DLL_XFORM_QUSE0 */
+ 0x00000000 /* EMC_DLL_XFORM_QUSE1 */
+ 0x00000000 /* EMC_DLL_XFORM_QUSE2 */
+ 0x00000000 /* EMC_DLL_XFORM_QUSE3 */
+ 0x00000000 /* EMC_DLL_XFORM_QUSE4 */
+ 0x00000000 /* EMC_DLL_XFORM_QUSE5 */
+ 0x00000000 /* EMC_DLL_XFORM_QUSE6 */
+ 0x00000000 /* EMC_DLL_XFORM_QUSE7 */
+ 0x00000000 /* EMC_DLL_XFORM_ADDR0 */
+ 0x00000000 /* EMC_DLL_XFORM_ADDR1 */
+ 0x00000000 /* EMC_DLL_XFORM_ADDR2 */
+ 0x00000000 /* EMC_DLL_XFORM_ADDR3 */
+ 0x00000000 /* EMC_DLL_XFORM_ADDR4 */
+ 0x00000000 /* EMC_DLL_XFORM_ADDR5 */
+ 0x00000000 /* EMC_DLL_XFORM_QUSE8 */
+ 0x00000000 /* EMC_DLL_XFORM_QUSE9 */
+ 0x00000000 /* EMC_DLL_XFORM_QUSE10 */
+ 0x00000000 /* EMC_DLL_XFORM_QUSE11 */
+ 0x00000000 /* EMC_DLL_XFORM_QUSE12 */
+ 0x00000000 /* EMC_DLL_XFORM_QUSE13 */
+ 0x00000000 /* EMC_DLL_XFORM_QUSE14 */
+ 0x00000000 /* EMC_DLL_XFORM_QUSE15 */
+ 0x00000000 /* EMC_DLI_TRIM_TXDQS0 */
+ 0x00000000 /* EMC_DLI_TRIM_TXDQS1 */
+ 0x00000000 /* EMC_DLI_TRIM_TXDQS2 */
+ 0x00000000 /* EMC_DLI_TRIM_TXDQS3 */
+ 0x00000000 /* EMC_DLI_TRIM_TXDQS4 */
+ 0x00000000 /* EMC_DLI_TRIM_TXDQS5 */
+ 0x00000000 /* EMC_DLI_TRIM_TXDQS6 */
+ 0x00000000 /* EMC_DLI_TRIM_TXDQS7 */
+ 0x00000000 /* EMC_DLI_TRIM_TXDQS8 */
+ 0x00000000 /* EMC_DLI_TRIM_TXDQS9 */
+ 0x00000000 /* EMC_DLI_TRIM_TXDQS10 */
+ 0x00000000 /* EMC_DLI_TRIM_TXDQS11 */
+ 0x00000000 /* EMC_DLI_TRIM_TXDQS12 */
+ 0x00000000 /* EMC_DLI_TRIM_TXDQS13 */
+ 0x00000000 /* EMC_DLI_TRIM_TXDQS14 */
+ 0x00000000 /* EMC_DLI_TRIM_TXDQS15 */
+ 0x000fc000 /* EMC_DLL_XFORM_DQ0 */
+ 0x000fc000 /* EMC_DLL_XFORM_DQ1 */
+ 0x000fc000 /* EMC_DLL_XFORM_DQ2 */
+ 0x000fc000 /* EMC_DLL_XFORM_DQ3 */
+ 0x0000fc00 /* EMC_DLL_XFORM_DQ4 */
+ 0x0000fc00 /* EMC_DLL_XFORM_DQ5 */
+ 0x0000fc00 /* EMC_DLL_XFORM_DQ6 */
+ 0x0000fc00 /* EMC_DLL_XFORM_DQ7 */
+ 0x10000280 /* EMC_XM2CMDPADCTRL */
+ 0x00000000 /* EMC_XM2CMDPADCTRL4 */
+ 0x00111111 /* EMC_XM2CMDPADCTRL5 */
+ 0x00000000 /* EMC_XM2DQPADCTRL2 */
+ 0x00000000 /* EMC_XM2DQPADCTRL3 */
+ 0x77ffc081 /* EMC_XM2CLKPADCTRL */
+ 0x00000e0e /* EMC_XM2CLKPADCTRL2 */
+ 0x81f1f108 /* EMC_XM2COMPPADCTRL */
+ 0x07070004 /* EMC_XM2VTTGENPADCTRL */
+ 0x0000003f /* EMC_XM2VTTGENPADCTRL2 */
+ 0x016eeeee /* EMC_XM2VTTGENPADCTRL3 */
+ 0x51451400 /* EMC_XM2DQSPADCTRL3 */
+ 0x00514514 /* EMC_XM2DQSPADCTRL4 */
+ 0x00514514 /* EMC_XM2DQSPADCTRL5 */
+ 0x51451400 /* EMC_XM2DQSPADCTRL6 */
+ 0x0000003f /* EMC_DSR_VTTGEN_DRV */
+ 0x00000007 /* EMC_TXDSRVTTGEN */
+ 0x00000000 /* EMC_FBIO_SPARE */
+ 0x00000042 /* EMC_ZCAL_WAIT_CNT */
+ 0x000e000e /* EMC_MRS_WAIT_CNT2 */
+ 0x00000000 /* EMC_CTT */
+ 0x00000003 /* EMC_CTT_DURATION */
+ 0x0000f2f3 /* EMC_CFG_PIPE */
+ 0x800001c5 /* EMC_DYN_SELF_REF_CONTROL */
+ 0x0000000a /* EMC_QPOP */
+ >;
+ };
+ };
+ };
+};
diff --git a/drivers/memory/tegra/Kconfig b/drivers/memory/tegra/Kconfig
index 571087621827..6d74e499e18d 100644
--- a/drivers/memory/tegra/Kconfig
+++ b/drivers/memory/tegra/Kconfig
@@ -5,3 +5,13 @@ config TEGRA_MC
help
This driver supports the Memory Controller (MC) hardware found on
NVIDIA Tegra SoCs.
+
+config TEGRA124_EMC
+ bool "NVIDIA Tegra124 External Memory Controller driver"
+ default y
+ depends on TEGRA_MC && ARCH_TEGRA_124_SOC
+ help
+ This driver is for the External Memory Controller (EMC) found on
+ Tegra124 chips. The EMC controls the external DRAM on the board.
+ This driver is required to change memory timings / clock rate for
+ external memory.
diff --git a/drivers/memory/tegra/Makefile b/drivers/memory/tegra/Makefile
index 9d4f4319b527..6a0b9ac54f05 100644
--- a/drivers/memory/tegra/Makefile
+++ b/drivers/memory/tegra/Makefile
@@ -6,3 +6,5 @@ tegra-mc-$(CONFIG_ARCH_TEGRA_124_SOC) += tegra124.o
tegra-mc-$(CONFIG_ARCH_TEGRA_132_SOC) += tegra124.o
obj-$(CONFIG_TEGRA_MC) += tegra-mc.o
+
+obj-$(CONFIG_TEGRA124_EMC) += tegra124-emc.o
diff --git a/drivers/memory/tegra/mc.c b/drivers/memory/tegra/mc.c
index 918236457c16..c71ede67e6c8 100644
--- a/drivers/memory/tegra/mc.c
+++ b/drivers/memory/tegra/mc.c
@@ -13,6 +13,9 @@
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
+#include <linux/sort.h>
+
+#include <soc/tegra/fuse.h>
#include "mc.h"
@@ -48,6 +51,9 @@
#define MC_EMEM_ARB_CFG_CYCLES_PER_UPDATE_MASK 0x1ff
#define MC_EMEM_ARB_MISC0 0xd8
+#define MC_EMEM_ADR_CFG 0x54
+#define MC_EMEM_ADR_CFG_EMEM_NUMDEV BIT(0)
+
static const struct of_device_id tegra_mc_of_match[] = {
#ifdef CONFIG_ARCH_TEGRA_3x_SOC
{ .compatible = "nvidia,tegra30-mc", .data = &tegra30_mc_soc },
@@ -94,6 +100,130 @@ static int tegra_mc_setup_latency_allowance(struct tegra_mc *mc)
return 0;
}
+void tegra_mc_write_emem_configuration(struct tegra_mc *mc, unsigned long rate)
+{
+ unsigned int i;
+ struct tegra_mc_timing *timing = NULL;
+
+ for (i = 0; i < mc->num_timings; i++) {
+ if (mc->timings[i].rate == rate) {
+ timing = &mc->timings[i];
+ break;
+ }
+ }
+
+ if (!timing) {
+ dev_err(mc->dev, "no memory timing registered for rate %lu\n",
+ rate);
+ return;
+ }
+
+ for (i = 0; i < mc->soc->num_emem_regs; ++i)
+ mc_writel(mc, timing->emem_data[i], mc->soc->emem_regs[i]);
+}
+
+unsigned int tegra_mc_get_emem_device_count(struct tegra_mc *mc)
+{
+ u8 dram_count;
+
+ dram_count = mc_readl(mc, MC_EMEM_ADR_CFG);
+ dram_count &= MC_EMEM_ADR_CFG_EMEM_NUMDEV;
+ dram_count++;
+
+ return dram_count;
+}
+
+static int load_one_timing(struct tegra_mc *mc,
+ struct tegra_mc_timing *timing,
+ struct device_node *node)
+{
+ int err;
+ u32 tmp;
+
+ err = of_property_read_u32(node, "clock-frequency", &tmp);
+ if (err) {
+ dev_err(mc->dev,
+ "timing %s: failed to read rate\n", node->name);
+ return err;
+ }
+
+ timing->rate = tmp;
+ timing->emem_data = devm_kcalloc(mc->dev, mc->soc->num_emem_regs,
+ sizeof(u32), GFP_KERNEL);
+ if (!timing->emem_data)
+ return -ENOMEM;
+
+ err = of_property_read_u32_array(node, "nvidia,emem-configuration",
+ timing->emem_data,
+ mc->soc->num_emem_regs);
+ if (err) {
+ dev_err(mc->dev,
+ "timing %s: failed to read EMEM configuration\n",
+ node->name);
+ return err;
+ }
+
+ return 0;
+}
+
+static int load_timings(struct tegra_mc *mc, struct device_node *node)
+{
+ struct device_node *child;
+ struct tegra_mc_timing *timing;
+ int child_count = of_get_child_count(node);
+ int i = 0, err;
+
+ mc->timings = devm_kcalloc(mc->dev, child_count, sizeof(*timing),
+ GFP_KERNEL);
+ if (!mc->timings)
+ return -ENOMEM;
+
+ mc->num_timings = child_count;
+
+ for_each_child_of_node(node, child) {
+ timing = &mc->timings[i++];
+
+ err = load_one_timing(mc, timing, child);
+ if (err)
+ return err;
+ }
+
+ return 0;
+}
+
+static int tegra_mc_setup_timings(struct tegra_mc *mc)
+{
+ struct device_node *node;
+ u32 ram_code, node_ram_code;
+ int err;
+
+ ram_code = tegra_read_ram_code();
+
+ mc->num_timings = 0;
+
+ for_each_child_of_node(mc->dev->of_node, node) {
+ err = of_property_read_u32(node, "nvidia,ram-code",
+ &node_ram_code);
+ if (err || (node_ram_code != ram_code)) {
+ of_node_put(node);
+ continue;
+ }
+
+ err = load_timings(mc, node);
+ if (err)
+ return err;
+ of_node_put(node);
+ break;
+ }
+
+ if (mc->num_timings == 0)
+ dev_warn(mc->dev,
+ "no memory timings for RAM code %u registered\n",
+ ram_code);
+
+ return 0;
+}
+
static const char *const status_names[32] = {
[ 1] = "External interrupt",
[ 6] = "EMEM address decode error",
@@ -251,6 +381,12 @@ static int tegra_mc_probe(struct platform_device *pdev)
return err;
}
+ err = tegra_mc_setup_timings(mc);
+ if (err < 0) {
+ dev_err(&pdev->dev, "failed to setup timings: %d\n", err);
+ return err;
+ }
+
if (IS_ENABLED(CONFIG_TEGRA_IOMMU_SMMU)) {
mc->smmu = tegra_smmu_probe(&pdev->dev, mc->soc->smmu, mc);
if (IS_ERR(mc->smmu)) {
diff --git a/drivers/memory/tegra/tegra124-emc.c b/drivers/memory/tegra/tegra124-emc.c
new file mode 100644
index 000000000000..8620355776fe
--- /dev/null
+++ b/drivers/memory/tegra/tegra124-emc.c
@@ -0,0 +1,1140 @@
+/*
+ * Copyright (c) 2014, NVIDIA CORPORATION. All rights reserved.
+ *
+ * Author:
+ * Mikko Perttunen <mperttunen@nvidia.com>
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#include <linux/clk-provider.h>
+#include <linux/clk.h>
+#include <linux/clkdev.h>
+#include <linux/debugfs.h>
+#include <linux/delay.h>
+#include <linux/of_address.h>
+#include <linux/of_platform.h>
+#include <linux/platform_device.h>
+#include <linux/sort.h>
+#include <linux/string.h>
+
+#include <soc/tegra/emc.h>
+#include <soc/tegra/fuse.h>
+#include <soc/tegra/mc.h>
+
+#define EMC_FBIO_CFG5 0x104
+#define EMC_FBIO_CFG5_DRAM_TYPE_MASK 0x3
+#define EMC_FBIO_CFG5_DRAM_TYPE_SHIFT 0
+
+#define EMC_INTSTATUS 0x0
+#define EMC_INTSTATUS_CLKCHANGE_COMPLETE BIT(4)
+
+#define EMC_CFG 0xc
+#define EMC_CFG_DRAM_CLKSTOP_PD BIT(31)
+#define EMC_CFG_DRAM_CLKSTOP_SR BIT(30)
+#define EMC_CFG_DRAM_ACPD BIT(29)
+#define EMC_CFG_DYN_SREF BIT(28)
+#define EMC_CFG_PWR_MASK ((0xF << 28) | BIT(18))
+#define EMC_CFG_DSR_VTTGEN_DRV_EN BIT(18)
+
+#define EMC_REFCTRL 0x20
+#define EMC_REFCTRL_DEV_SEL_SHIFT 0
+#define EMC_REFCTRL_ENABLE BIT(31)
+
+#define EMC_TIMING_CONTROL 0x28
+#define EMC_RC 0x2c
+#define EMC_RFC 0x30
+#define EMC_RAS 0x34
+#define EMC_RP 0x38
+#define EMC_R2W 0x3c
+#define EMC_W2R 0x40
+#define EMC_R2P 0x44
+#define EMC_W2P 0x48
+#define EMC_RD_RCD 0x4c
+#define EMC_WR_RCD 0x50
+#define EMC_RRD 0x54
+#define EMC_REXT 0x58
+#define EMC_WDV 0x5c
+#define EMC_QUSE 0x60
+#define EMC_QRST 0x64
+#define EMC_QSAFE 0x68
+#define EMC_RDV 0x6c
+#define EMC_REFRESH 0x70
+#define EMC_BURST_REFRESH_NUM 0x74
+#define EMC_PDEX2WR 0x78
+#define EMC_PDEX2RD 0x7c
+#define EMC_PCHG2PDEN 0x80
+#define EMC_ACT2PDEN 0x84
+#define EMC_AR2PDEN 0x88
+#define EMC_RW2PDEN 0x8c
+#define EMC_TXSR 0x90
+#define EMC_TCKE 0x94
+#define EMC_TFAW 0x98
+#define EMC_TRPAB 0x9c
+#define EMC_TCLKSTABLE 0xa0
+#define EMC_TCLKSTOP 0xa4
+#define EMC_TREFBW 0xa8
+#define EMC_ODT_WRITE 0xb0
+#define EMC_ODT_READ 0xb4
+#define EMC_WEXT 0xb8
+#define EMC_CTT 0xbc
+#define EMC_RFC_SLR 0xc0
+#define EMC_MRS_WAIT_CNT2 0xc4
+
+#define EMC_MRS_WAIT_CNT 0xc8
+#define EMC_MRS_WAIT_CNT_SHORT_WAIT_SHIFT 0
+#define EMC_MRS_WAIT_CNT_SHORT_WAIT_MASK \
+ (0x3FF << EMC_MRS_WAIT_CNT_SHORT_WAIT_SHIFT)
+#define EMC_MRS_WAIT_CNT_LONG_WAIT_SHIFT 16
+#define EMC_MRS_WAIT_CNT_LONG_WAIT_MASK \
+ (0x3FF << EMC_MRS_WAIT_CNT_LONG_WAIT_SHIFT)
+
+#define EMC_MRS 0xcc
+#define EMC_MODE_SET_DLL_RESET BIT(8)
+#define EMC_MODE_SET_LONG_CNT BIT(26)
+#define EMC_EMRS 0xd0
+#define EMC_REF 0xd4
+#define EMC_PRE 0xd8
+
+#define EMC_SELF_REF 0xe0
+#define EMC_SELF_REF_CMD_ENABLED BIT(0)
+#define EMC_SELF_REF_DEV_SEL_SHIFT 30
+
+#define EMC_MRW 0xe8
+
+#define EMC_MRR 0xec
+#define EMC_MRR_MA_SHIFT 16
+#define LPDDR2_MR4_TEMP_SHIFT 0
+
+#define EMC_XM2DQSPADCTRL3 0xf8
+#define EMC_FBIO_SPARE 0x100
+
+#define EMC_FBIO_CFG6 0x114
+#define EMC_EMRS2 0x12c
+#define EMC_MRW2 0x134
+#define EMC_MRW4 0x13c
+#define EMC_EINPUT 0x14c
+#define EMC_EINPUT_DURATION 0x150
+#define EMC_PUTERM_EXTRA 0x154
+#define EMC_TCKESR 0x158
+#define EMC_TPD 0x15c
+
+#define EMC_AUTO_CAL_CONFIG 0x2a4
+#define EMC_AUTO_CAL_CONFIG_AUTO_CAL_START BIT(31)
+#define EMC_AUTO_CAL_INTERVAL 0x2a8
+#define EMC_AUTO_CAL_STATUS 0x2ac
+#define EMC_AUTO_CAL_STATUS_ACTIVE BIT(31)
+#define EMC_STATUS 0x2b4
+#define EMC_STATUS_TIMING_UPDATE_STALLED BIT(23)
+
+#define EMC_CFG_2 0x2b8
+#define EMC_CFG_2_MODE_SHIFT 0
+#define EMC_CFG_2_DIS_STP_OB_CLK_DURING_NON_WR BIT(6)
+
+#define EMC_CFG_DIG_DLL 0x2bc
+#define EMC_CFG_DIG_DLL_PERIOD 0x2c0
+#define EMC_RDV_MASK 0x2cc
+#define EMC_WDV_MASK 0x2d0
+#define EMC_CTT_DURATION 0x2d8
+#define EMC_CTT_TERM_CTRL 0x2dc
+#define EMC_ZCAL_INTERVAL 0x2e0
+#define EMC_ZCAL_WAIT_CNT 0x2e4
+
+#define EMC_ZQ_CAL 0x2ec
+#define EMC_ZQ_CAL_CMD BIT(0)
+#define EMC_ZQ_CAL_LONG BIT(4)
+#define EMC_ZQ_CAL_LONG_CMD_DEV0 \
+ (DRAM_DEV_SEL_0 | EMC_ZQ_CAL_LONG | EMC_ZQ_CAL_CMD)
+#define EMC_ZQ_CAL_LONG_CMD_DEV1 \
+ (DRAM_DEV_SEL_1 | EMC_ZQ_CAL_LONG | EMC_ZQ_CAL_CMD)
+
+#define EMC_XM2CMDPADCTRL 0x2f0
+#define EMC_XM2DQSPADCTRL 0x2f8
+#define EMC_XM2DQSPADCTRL2 0x2fc
+#define EMC_XM2DQSPADCTRL2_RX_FT_REC_ENABLE BIT(0)
+#define EMC_XM2DQSPADCTRL2_VREF_ENABLE BIT(5)
+#define EMC_XM2DQPADCTRL 0x300
+#define EMC_XM2DQPADCTRL2 0x304
+#define EMC_XM2CLKPADCTRL 0x308
+#define EMC_XM2COMPPADCTRL 0x30c
+#define EMC_XM2VTTGENPADCTRL 0x310
+#define EMC_XM2VTTGENPADCTRL2 0x314
+#define EMC_XM2VTTGENPADCTRL3 0x318
+#define EMC_XM2DQSPADCTRL4 0x320
+#define EMC_DLL_XFORM_DQS0 0x328
+#define EMC_DLL_XFORM_DQS1 0x32c
+#define EMC_DLL_XFORM_DQS2 0x330
+#define EMC_DLL_XFORM_DQS3 0x334
+#define EMC_DLL_XFORM_DQS4 0x338
+#define EMC_DLL_XFORM_DQS5 0x33c
+#define EMC_DLL_XFORM_DQS6 0x340
+#define EMC_DLL_XFORM_DQS7 0x344
+#define EMC_DLL_XFORM_QUSE0 0x348
+#define EMC_DLL_XFORM_QUSE1 0x34c
+#define EMC_DLL_XFORM_QUSE2 0x350
+#define EMC_DLL_XFORM_QUSE3 0x354
+#define EMC_DLL_XFORM_QUSE4 0x358
+#define EMC_DLL_XFORM_QUSE5 0x35c
+#define EMC_DLL_XFORM_QUSE6 0x360
+#define EMC_DLL_XFORM_QUSE7 0x364
+#define EMC_DLL_XFORM_DQ0 0x368
+#define EMC_DLL_XFORM_DQ1 0x36c
+#define EMC_DLL_XFORM_DQ2 0x370
+#define EMC_DLL_XFORM_DQ3 0x374
+#define EMC_DLI_TRIM_TXDQS0 0x3a8
+#define EMC_DLI_TRIM_TXDQS1 0x3ac
+#define EMC_DLI_TRIM_TXDQS2 0x3b0
+#define EMC_DLI_TRIM_TXDQS3 0x3b4
+#define EMC_DLI_TRIM_TXDQS4 0x3b8
+#define EMC_DLI_TRIM_TXDQS5 0x3bc
+#define EMC_DLI_TRIM_TXDQS6 0x3c0
+#define EMC_DLI_TRIM_TXDQS7 0x3c4
+#define EMC_STALL_THEN_EXE_AFTER_CLKCHANGE 0x3cc
+#define EMC_SEL_DPD_CTRL 0x3d8
+#define EMC_SEL_DPD_CTRL_DATA_SEL_DPD BIT(8)
+#define EMC_SEL_DPD_CTRL_ODT_SEL_DPD BIT(5)
+#define EMC_SEL_DPD_CTRL_RESET_SEL_DPD BIT(4)
+#define EMC_SEL_DPD_CTRL_CA_SEL_DPD BIT(3)
+#define EMC_SEL_DPD_CTRL_CLK_SEL_DPD BIT(2)
+#define EMC_SEL_DPD_CTRL_DDR3_MASK \
+ ((0xf << 2) | BIT(8))
+#define EMC_SEL_DPD_CTRL_MASK \
+ ((0x3 << 2) | BIT(5) | BIT(8))
+#define EMC_PRE_REFRESH_REQ_CNT 0x3dc
+#define EMC_DYN_SELF_REF_CONTROL 0x3e0
+#define EMC_TXSRDLL 0x3e4
+#define EMC_CCFIFO_ADDR 0x3e8
+#define EMC_CCFIFO_DATA 0x3ec
+#define EMC_CCFIFO_STATUS 0x3f0
+#define EMC_CDB_CNTL_1 0x3f4
+#define EMC_CDB_CNTL_2 0x3f8
+#define EMC_XM2CLKPADCTRL2 0x3fc
+#define EMC_AUTO_CAL_CONFIG2 0x458
+#define EMC_AUTO_CAL_CONFIG3 0x45c
+#define EMC_IBDLY 0x468
+#define EMC_DLL_XFORM_ADDR0 0x46c
+#define EMC_DLL_XFORM_ADDR1 0x470
+#define EMC_DLL_XFORM_ADDR2 0x474
+#define EMC_DSR_VTTGEN_DRV 0x47c
+#define EMC_TXDSRVTTGEN 0x480
+#define EMC_XM2CMDPADCTRL4 0x484
+#define EMC_XM2CMDPADCTRL5 0x488
+#define EMC_DLL_XFORM_DQS8 0x4a0
+#define EMC_DLL_XFORM_DQS9 0x4a4
+#define EMC_DLL_XFORM_DQS10 0x4a8
+#define EMC_DLL_XFORM_DQS11 0x4ac
+#define EMC_DLL_XFORM_DQS12 0x4b0
+#define EMC_DLL_XFORM_DQS13 0x4b4
+#define EMC_DLL_XFORM_DQS14 0x4b8
+#define EMC_DLL_XFORM_DQS15 0x4bc
+#define EMC_DLL_XFORM_QUSE8 0x4c0
+#define EMC_DLL_XFORM_QUSE9 0x4c4
+#define EMC_DLL_XFORM_QUSE10 0x4c8
+#define EMC_DLL_XFORM_QUSE11 0x4cc
+#define EMC_DLL_XFORM_QUSE12 0x4d0
+#define EMC_DLL_XFORM_QUSE13 0x4d4
+#define EMC_DLL_XFORM_QUSE14 0x4d8
+#define EMC_DLL_XFORM_QUSE15 0x4dc
+#define EMC_DLL_XFORM_DQ4 0x4e0
+#define EMC_DLL_XFORM_DQ5 0x4e4
+#define EMC_DLL_XFORM_DQ6 0x4e8
+#define EMC_DLL_XFORM_DQ7 0x4ec
+#define EMC_DLI_TRIM_TXDQS8 0x520
+#define EMC_DLI_TRIM_TXDQS9 0x524
+#define EMC_DLI_TRIM_TXDQS10 0x528
+#define EMC_DLI_TRIM_TXDQS11 0x52c
+#define EMC_DLI_TRIM_TXDQS12 0x530
+#define EMC_DLI_TRIM_TXDQS13 0x534
+#define EMC_DLI_TRIM_TXDQS14 0x538
+#define EMC_DLI_TRIM_TXDQS15 0x53c
+#define EMC_CDB_CNTL_3 0x540
+#define EMC_XM2DQSPADCTRL5 0x544
+#define EMC_XM2DQSPADCTRL6 0x548
+#define EMC_XM2DQPADCTRL3 0x54c
+#define EMC_DLL_XFORM_ADDR3 0x550
+#define EMC_DLL_XFORM_ADDR4 0x554
+#define EMC_DLL_XFORM_ADDR5 0x558
+#define EMC_CFG_PIPE 0x560
+#define EMC_QPOP 0x564
+#define EMC_QUSE_WIDTH 0x568
+#define EMC_PUTERM_WIDTH 0x56c
+#define EMC_BGBIAS_CTL0 0x570
+#define EMC_BGBIAS_CTL0_BIAS0_DSC_E_PWRD_IBIAS_RX BIT(3)
+#define EMC_BGBIAS_CTL0_BIAS0_DSC_E_PWRD_IBIAS_VTTGEN BIT(2)
+#define EMC_BGBIAS_CTL0_BIAS0_DSC_E_PWRD BIT(1)
+#define EMC_PUTERM_ADJ 0x574
+
+#define DRAM_DEV_SEL_ALL 0
+#define DRAM_DEV_SEL_0 (2 << 30)
+#define DRAM_DEV_SEL_1 (1 << 30)
+
+#define EMC_CFG_POWER_FEATURES_MASK \
+ (EMC_CFG_DYN_SREF | EMC_CFG_DRAM_ACPD | EMC_CFG_DRAM_CLKSTOP_SR | \
+ EMC_CFG_DRAM_CLKSTOP_PD | EMC_CFG_DSR_VTTGEN_DRV_EN)
+#define EMC_REFCTRL_DEV_SEL(n) (((n > 1) ? 0 : 2) << EMC_REFCTRL_DEV_SEL_SHIFT)
+#define EMC_DRAM_DEV_SEL(n) ((n > 1) ? DRAM_DEV_SEL_ALL : DRAM_DEV_SEL_0)
+
+/* Maximum amount of time in us. to wait for changes to become effective */
+#define EMC_STATUS_UPDATE_TIMEOUT 1000
+
+enum emc_dram_type {
+ DRAM_TYPE_DDR3 = 0,
+ DRAM_TYPE_DDR1 = 1,
+ DRAM_TYPE_LPDDR3 = 2,
+ DRAM_TYPE_DDR2 = 3
+};
+
+enum emc_dll_change {
+ DLL_CHANGE_NONE,
+ DLL_CHANGE_ON,
+ DLL_CHANGE_OFF
+};
+
+static const unsigned long emc_burst_regs[] = {
+ EMC_RC,
+ EMC_RFC,
+ EMC_RFC_SLR,
+ EMC_RAS,
+ EMC_RP,
+ EMC_R2W,
+ EMC_W2R,
+ EMC_R2P,
+ EMC_W2P,
+ EMC_RD_RCD,
+ EMC_WR_RCD,
+ EMC_RRD,
+ EMC_REXT,
+ EMC_WEXT,
+ EMC_WDV,
+ EMC_WDV_MASK,
+ EMC_QUSE,
+ EMC_QUSE_WIDTH,
+ EMC_IBDLY,
+ EMC_EINPUT,
+ EMC_EINPUT_DURATION,
+ EMC_PUTERM_EXTRA,
+ EMC_PUTERM_WIDTH,
+ EMC_PUTERM_ADJ,
+ EMC_CDB_CNTL_1,
+ EMC_CDB_CNTL_2,
+ EMC_CDB_CNTL_3,
+ EMC_QRST,
+ EMC_QSAFE,
+ EMC_RDV,
+ EMC_RDV_MASK,
+ EMC_REFRESH,
+ EMC_BURST_REFRESH_NUM,
+ EMC_PRE_REFRESH_REQ_CNT,
+ EMC_PDEX2WR,
+ EMC_PDEX2RD,
+ EMC_PCHG2PDEN,
+ EMC_ACT2PDEN,
+ EMC_AR2PDEN,
+ EMC_RW2PDEN,
+ EMC_TXSR,
+ EMC_TXSRDLL,
+ EMC_TCKE,
+ EMC_TCKESR,
+ EMC_TPD,
+ EMC_TFAW,
+ EMC_TRPAB,
+ EMC_TCLKSTABLE,
+ EMC_TCLKSTOP,
+ EMC_TREFBW,
+ EMC_FBIO_CFG6,
+ EMC_ODT_WRITE,
+ EMC_ODT_READ,
+ EMC_FBIO_CFG5,
+ EMC_CFG_DIG_DLL,
+ EMC_CFG_DIG_DLL_PERIOD,
+ EMC_DLL_XFORM_DQS0,
+ EMC_DLL_XFORM_DQS1,
+ EMC_DLL_XFORM_DQS2,
+ EMC_DLL_XFORM_DQS3,
+ EMC_DLL_XFORM_DQS4,
+ EMC_DLL_XFORM_DQS5,
+ EMC_DLL_XFORM_DQS6,
+ EMC_DLL_XFORM_DQS7,
+ EMC_DLL_XFORM_DQS8,
+ EMC_DLL_XFORM_DQS9,
+ EMC_DLL_XFORM_DQS10,
+ EMC_DLL_XFORM_DQS11,
+ EMC_DLL_XFORM_DQS12,
+ EMC_DLL_XFORM_DQS13,
+ EMC_DLL_XFORM_DQS14,
+ EMC_DLL_XFORM_DQS15,
+ EMC_DLL_XFORM_QUSE0,
+ EMC_DLL_XFORM_QUSE1,
+ EMC_DLL_XFORM_QUSE2,
+ EMC_DLL_XFORM_QUSE3,
+ EMC_DLL_XFORM_QUSE4,
+ EMC_DLL_XFORM_QUSE5,
+ EMC_DLL_XFORM_QUSE6,
+ EMC_DLL_XFORM_QUSE7,
+ EMC_DLL_XFORM_ADDR0,
+ EMC_DLL_XFORM_ADDR1,
+ EMC_DLL_XFORM_ADDR2,
+ EMC_DLL_XFORM_ADDR3,
+ EMC_DLL_XFORM_ADDR4,
+ EMC_DLL_XFORM_ADDR5,
+ EMC_DLL_XFORM_QUSE8,
+ EMC_DLL_XFORM_QUSE9,
+ EMC_DLL_XFORM_QUSE10,
+ EMC_DLL_XFORM_QUSE11,
+ EMC_DLL_XFORM_QUSE12,
+ EMC_DLL_XFORM_QUSE13,
+ EMC_DLL_XFORM_QUSE14,
+ EMC_DLL_XFORM_QUSE15,
+ EMC_DLI_TRIM_TXDQS0,
+ EMC_DLI_TRIM_TXDQS1,
+ EMC_DLI_TRIM_TXDQS2,
+ EMC_DLI_TRIM_TXDQS3,
+ EMC_DLI_TRIM_TXDQS4,
+ EMC_DLI_TRIM_TXDQS5,
+ EMC_DLI_TRIM_TXDQS6,
+ EMC_DLI_TRIM_TXDQS7,
+ EMC_DLI_TRIM_TXDQS8,
+ EMC_DLI_TRIM_TXDQS9,
+ EMC_DLI_TRIM_TXDQS10,
+ EMC_DLI_TRIM_TXDQS11,
+ EMC_DLI_TRIM_TXDQS12,
+ EMC_DLI_TRIM_TXDQS13,
+ EMC_DLI_TRIM_TXDQS14,
+ EMC_DLI_TRIM_TXDQS15,
+ EMC_DLL_XFORM_DQ0,
+ EMC_DLL_XFORM_DQ1,
+ EMC_DLL_XFORM_DQ2,
+ EMC_DLL_XFORM_DQ3,
+ EMC_DLL_XFORM_DQ4,
+ EMC_DLL_XFORM_DQ5,
+ EMC_DLL_XFORM_DQ6,
+ EMC_DLL_XFORM_DQ7,
+ EMC_XM2CMDPADCTRL,
+ EMC_XM2CMDPADCTRL4,
+ EMC_XM2CMDPADCTRL5,
+ EMC_XM2DQPADCTRL2,
+ EMC_XM2DQPADCTRL3,
+ EMC_XM2CLKPADCTRL,
+ EMC_XM2CLKPADCTRL2,
+ EMC_XM2COMPPADCTRL,
+ EMC_XM2VTTGENPADCTRL,
+ EMC_XM2VTTGENPADCTRL2,
+ EMC_XM2VTTGENPADCTRL3,
+ EMC_XM2DQSPADCTRL3,
+ EMC_XM2DQSPADCTRL4,
+ EMC_XM2DQSPADCTRL5,
+ EMC_XM2DQSPADCTRL6,
+ EMC_DSR_VTTGEN_DRV,
+ EMC_TXDSRVTTGEN,
+ EMC_FBIO_SPARE,
+ EMC_ZCAL_WAIT_CNT,
+ EMC_MRS_WAIT_CNT2,
+ EMC_CTT,
+ EMC_CTT_DURATION,
+ EMC_CFG_PIPE,
+ EMC_DYN_SELF_REF_CONTROL,
+ EMC_QPOP
+};
+
+struct emc_timing {
+ unsigned long rate;
+
+ u32 emc_burst_data[ARRAY_SIZE(emc_burst_regs)];
+
+ u32 emc_auto_cal_config;
+ u32 emc_auto_cal_config2;
+ u32 emc_auto_cal_config3;
+ u32 emc_auto_cal_interval;
+ u32 emc_bgbias_ctl0;
+ u32 emc_cfg;
+ u32 emc_cfg_2;
+ u32 emc_ctt_term_ctrl;
+ u32 emc_mode_1;
+ u32 emc_mode_2;
+ u32 emc_mode_4;
+ u32 emc_mode_reset;
+ u32 emc_mrs_wait_cnt;
+ u32 emc_sel_dpd_ctrl;
+ u32 emc_xm2dqspadctrl2;
+ u32 emc_zcal_cnt_long;
+ u32 emc_zcal_interval;
+};
+
+struct tegra_emc {
+ struct device *dev;
+
+ struct tegra_mc *mc;
+
+ void __iomem *regs;
+
+ enum emc_dram_type dram_type;
+ unsigned int dram_num;
+
+ struct emc_timing last_timing;
+ struct emc_timing *timings;
+ unsigned int num_timings;
+};
+
+/* Timing change sequence functions */
+
+static void emc_ccfifo_writel(struct tegra_emc *emc, u32 value,
+ unsigned long offset)
+{
+ writel(value, emc->regs + EMC_CCFIFO_DATA);
+ writel(offset, emc->regs + EMC_CCFIFO_ADDR);
+}
+
+static void emc_seq_update_timing(struct tegra_emc *emc)
+{
+ unsigned int i;
+ u32 value;
+
+ writel(1, emc->regs + EMC_TIMING_CONTROL);
+
+ for (i = 0; i < EMC_STATUS_UPDATE_TIMEOUT; ++i) {
+ value = readl(emc->regs + EMC_STATUS);
+ if ((value & EMC_STATUS_TIMING_UPDATE_STALLED) == 0)
+ return;
+ udelay(1);
+ }
+
+ dev_err(emc->dev, "timing update timed out\n");
+}
+
+static void emc_seq_disable_auto_cal(struct tegra_emc *emc)
+{
+ unsigned int i;
+ u32 value;
+
+ writel(0, emc->regs + EMC_AUTO_CAL_INTERVAL);
+
+ for (i = 0; i < EMC_STATUS_UPDATE_TIMEOUT; ++i) {
+ value = readl(emc->regs + EMC_AUTO_CAL_STATUS);
+ if ((value & EMC_AUTO_CAL_STATUS_ACTIVE) == 0)
+ return;
+ udelay(1);
+ }
+
+ dev_err(emc->dev, "auto cal disable timed out\n");
+}
+
+static void emc_seq_wait_clkchange(struct tegra_emc *emc)
+{
+ unsigned int i;
+ u32 value;
+
+ for (i = 0; i < EMC_STATUS_UPDATE_TIMEOUT; ++i) {
+ value = readl(emc->regs + EMC_INTSTATUS);
+ if (value & EMC_INTSTATUS_CLKCHANGE_COMPLETE)
+ return;
+ udelay(1);
+ }
+
+ dev_err(emc->dev, "clock change timed out\n");
+}
+
+static struct emc_timing *tegra_emc_find_timing(struct tegra_emc *emc,
+ unsigned long rate)
+{
+ struct emc_timing *timing = NULL;
+ unsigned int i;
+
+ for (i = 0; i < emc->num_timings; i++) {
+ if (emc->timings[i].rate == rate) {
+ timing = &emc->timings[i];
+ break;
+ }
+ }
+
+ if (!timing) {
+ dev_err(emc->dev, "no timing for rate %lu\n", rate);
+ return NULL;
+ }
+
+ return timing;
+}
+
+int tegra_emc_prepare_timing_change(struct tegra_emc *emc,
+ unsigned long rate)
+{
+ struct emc_timing *timing = tegra_emc_find_timing(emc, rate);
+ struct emc_timing *last = &emc->last_timing;
+ enum emc_dll_change dll_change;
+ unsigned int pre_wait = 0;
+ u32 val, val2, mask;
+ bool update = false;
+ unsigned int i;
+
+ if (!timing)
+ return -ENOENT;
+
+ if ((last->emc_mode_1 & 0x1) == (timing->emc_mode_1 & 0x1))
+ dll_change = DLL_CHANGE_NONE;
+ else if (timing->emc_mode_1 & 0x1)
+ dll_change = DLL_CHANGE_ON;
+ else
+ dll_change = DLL_CHANGE_OFF;
+
+ /* Clear CLKCHANGE_COMPLETE interrupts */
+ writel(EMC_INTSTATUS_CLKCHANGE_COMPLETE, emc->regs + EMC_INTSTATUS);
+
+ /* Disable dynamic self-refresh */
+ val = readl(emc->regs + EMC_CFG);
+ if (val & EMC_CFG_PWR_MASK) {
+ val &= ~EMC_CFG_POWER_FEATURES_MASK;
+ writel(val, emc->regs + EMC_CFG);
+
+ pre_wait = 5;
+ }
+
+ /* Disable SEL_DPD_CTRL for clock change */
+ if (emc->dram_type == DRAM_TYPE_DDR3)
+ mask = EMC_SEL_DPD_CTRL_DDR3_MASK;
+ else
+ mask = EMC_SEL_DPD_CTRL_MASK;
+
+ val = readl(emc->regs + EMC_SEL_DPD_CTRL);
+ if (val & mask) {
+ val &= ~mask;
+ writel(val, emc->regs + EMC_SEL_DPD_CTRL);
+ }
+
+ /* Prepare DQ/DQS for clock change */
+ val = readl(emc->regs + EMC_BGBIAS_CTL0);
+ val2 = last->emc_bgbias_ctl0;
+ if (!(timing->emc_bgbias_ctl0 &
+ EMC_BGBIAS_CTL0_BIAS0_DSC_E_PWRD_IBIAS_RX) &&
+ (val & EMC_BGBIAS_CTL0_BIAS0_DSC_E_PWRD_IBIAS_RX)) {
+ val2 &= ~EMC_BGBIAS_CTL0_BIAS0_DSC_E_PWRD_IBIAS_RX;
+ update = true;
+ }
+
+ if ((val & EMC_BGBIAS_CTL0_BIAS0_DSC_E_PWRD) ||
+ (val & EMC_BGBIAS_CTL0_BIAS0_DSC_E_PWRD_IBIAS_VTTGEN)) {
+ update = true;
+ }
+
+ if (update) {
+ writel(val2, emc->regs + EMC_BGBIAS_CTL0);
+ if (pre_wait < 5)
+ pre_wait = 5;
+ }
+
+ update = false;
+ val = readl(emc->regs + EMC_XM2DQSPADCTRL2);
+ if (timing->emc_xm2dqspadctrl2 & EMC_XM2DQSPADCTRL2_VREF_ENABLE &&
+ !(val & EMC_XM2DQSPADCTRL2_VREF_ENABLE)) {
+ val |= EMC_XM2DQSPADCTRL2_VREF_ENABLE;
+ update = true;
+ }
+
+ if (timing->emc_xm2dqspadctrl2 & EMC_XM2DQSPADCTRL2_RX_FT_REC_ENABLE &&
+ !(val & EMC_XM2DQSPADCTRL2_RX_FT_REC_ENABLE)) {
+ val |= EMC_XM2DQSPADCTRL2_RX_FT_REC_ENABLE;
+ update = true;
+ }
+
+ if (update) {
+ writel(val, emc->regs + EMC_XM2DQSPADCTRL2);
+ if (pre_wait < 30)
+ pre_wait = 30;
+ }
+
+ /* Wait to settle */
+ if (pre_wait) {
+ emc_seq_update_timing(emc);
+ udelay(pre_wait);
+ }
+
+ /* Program CTT_TERM control */
+ if (last->emc_ctt_term_ctrl != timing->emc_ctt_term_ctrl) {
+ emc_seq_disable_auto_cal(emc);
+ writel(timing->emc_ctt_term_ctrl,
+ emc->regs + EMC_CTT_TERM_CTRL);
+ emc_seq_update_timing(emc);
+ }
+
+ /* Program burst shadow registers */
+ for (i = 0; i < ARRAY_SIZE(timing->emc_burst_data); ++i)
+ writel(timing->emc_burst_data[i],
+ emc->regs + emc_burst_regs[i]);
+
+ writel(timing->emc_xm2dqspadctrl2, emc->regs + EMC_XM2DQSPADCTRL2);
+ writel(timing->emc_zcal_interval, emc->regs + EMC_ZCAL_INTERVAL);
+
+ tegra_mc_write_emem_configuration(emc->mc, timing->rate);
+
+ val = timing->emc_cfg & ~EMC_CFG_POWER_FEATURES_MASK;
+ emc_ccfifo_writel(emc, val, EMC_CFG);
+
+ /* Program AUTO_CAL_CONFIG */
+ if (timing->emc_auto_cal_config2 != last->emc_auto_cal_config2)
+ emc_ccfifo_writel(emc, timing->emc_auto_cal_config2,
+ EMC_AUTO_CAL_CONFIG2);
+
+ if (timing->emc_auto_cal_config3 != last->emc_auto_cal_config3)
+ emc_ccfifo_writel(emc, timing->emc_auto_cal_config3,
+ EMC_AUTO_CAL_CONFIG3);
+
+ if (timing->emc_auto_cal_config != last->emc_auto_cal_config) {
+ val = timing->emc_auto_cal_config;
+ val &= EMC_AUTO_CAL_CONFIG_AUTO_CAL_START;
+ emc_ccfifo_writel(emc, val, EMC_AUTO_CAL_CONFIG);
+ }
+
+ /* DDR3: predict MRS long wait count */
+ if (emc->dram_type == DRAM_TYPE_DDR3 &&
+ dll_change == DLL_CHANGE_ON) {
+ u32 cnt = 512;
+
+ if (timing->emc_zcal_interval != 0 &&
+ last->emc_zcal_interval == 0)
+ cnt -= emc->dram_num * 256;
+
+ val = (timing->emc_mrs_wait_cnt
+ & EMC_MRS_WAIT_CNT_SHORT_WAIT_MASK)
+ >> EMC_MRS_WAIT_CNT_SHORT_WAIT_SHIFT;
+ if (cnt < val)
+ cnt = val;
+
+ val = timing->emc_mrs_wait_cnt
+ & ~EMC_MRS_WAIT_CNT_LONG_WAIT_MASK;
+ val |= (cnt << EMC_MRS_WAIT_CNT_LONG_WAIT_SHIFT)
+ & EMC_MRS_WAIT_CNT_LONG_WAIT_MASK;
+
+ writel(val, emc->regs + EMC_MRS_WAIT_CNT);
+ }
+
+ val = timing->emc_cfg_2;
+ val &= ~EMC_CFG_2_DIS_STP_OB_CLK_DURING_NON_WR;
+ emc_ccfifo_writel(emc, val, EMC_CFG_2);
+
+ /* DDR3: Turn off DLL and enter self-refresh */
+ if (emc->dram_type == DRAM_TYPE_DDR3 && dll_change == DLL_CHANGE_OFF)
+ emc_ccfifo_writel(emc, timing->emc_mode_1, EMC_EMRS);
+
+ /* Disable refresh controller */
+ emc_ccfifo_writel(emc, EMC_REFCTRL_DEV_SEL(emc->dram_num),
+ EMC_REFCTRL);
+ if (emc->dram_type == DRAM_TYPE_DDR3)
+ emc_ccfifo_writel(emc, EMC_DRAM_DEV_SEL(emc->dram_num) |
+ EMC_SELF_REF_CMD_ENABLED,
+ EMC_SELF_REF);
+
+ /* Flow control marker */
+ emc_ccfifo_writel(emc, 1, EMC_STALL_THEN_EXE_AFTER_CLKCHANGE);
+
+ /* DDR3: Exit self-refresh */
+ if (emc->dram_type == DRAM_TYPE_DDR3)
+ emc_ccfifo_writel(emc, EMC_DRAM_DEV_SEL(emc->dram_num),
+ EMC_SELF_REF);
+ emc_ccfifo_writel(emc, EMC_REFCTRL_DEV_SEL(emc->dram_num) |
+ EMC_REFCTRL_ENABLE,
+ EMC_REFCTRL);
+
+ /* Set DRAM mode registers */
+ if (emc->dram_type == DRAM_TYPE_DDR3) {
+ if (timing->emc_mode_1 != last->emc_mode_1)
+ emc_ccfifo_writel(emc, timing->emc_mode_1, EMC_EMRS);
+ if (timing->emc_mode_2 != last->emc_mode_2)
+ emc_ccfifo_writel(emc, timing->emc_mode_2, EMC_EMRS2);
+
+ if ((timing->emc_mode_reset != last->emc_mode_reset) ||
+ dll_change == DLL_CHANGE_ON) {
+ val = timing->emc_mode_reset;
+ if (dll_change == DLL_CHANGE_ON) {
+ val |= EMC_MODE_SET_DLL_RESET;
+ val |= EMC_MODE_SET_LONG_CNT;
+ } else {
+ val &= ~EMC_MODE_SET_DLL_RESET;
+ }
+ emc_ccfifo_writel(emc, val, EMC_MRS);
+ }
+ } else {
+ if (timing->emc_mode_2 != last->emc_mode_2)
+ emc_ccfifo_writel(emc, timing->emc_mode_2, EMC_MRW2);
+ if (timing->emc_mode_1 != last->emc_mode_1)
+ emc_ccfifo_writel(emc, timing->emc_mode_1, EMC_MRW);
+ if (timing->emc_mode_4 != last->emc_mode_4)
+ emc_ccfifo_writel(emc, timing->emc_mode_4, EMC_MRW4);
+ }
+
+ /* Issue ZCAL command if turning ZCAL on */
+ if (timing->emc_zcal_interval != 0 && last->emc_zcal_interval == 0) {
+ emc_ccfifo_writel(emc, EMC_ZQ_CAL_LONG_CMD_DEV0, EMC_ZQ_CAL);
+ if (emc->dram_num > 1)
+ emc_ccfifo_writel(emc, EMC_ZQ_CAL_LONG_CMD_DEV1,
+ EMC_ZQ_CAL);
+ }
+
+ /* Write to RO register to remove stall after change */
+ emc_ccfifo_writel(emc, 0, EMC_CCFIFO_STATUS);
+
+ if (timing->emc_cfg_2 & EMC_CFG_2_DIS_STP_OB_CLK_DURING_NON_WR)
+ emc_ccfifo_writel(emc, timing->emc_cfg_2, EMC_CFG_2);
+
+ /* Disable AUTO_CAL for clock change */
+ emc_seq_disable_auto_cal(emc);
+
+ /* Read register to wait until programming has settled */
+ readl(emc->regs + EMC_INTSTATUS);
+
+ return 0;
+}
+
+void tegra_emc_complete_timing_change(struct tegra_emc *emc,
+ unsigned long rate)
+{
+ struct emc_timing *timing = tegra_emc_find_timing(emc, rate);
+ struct emc_timing *last = &emc->last_timing;
+ u32 val;
+
+ if (!timing)
+ return;
+
+ /* Wait until the state machine has settled */
+ emc_seq_wait_clkchange(emc);
+
+ /* Restore AUTO_CAL */
+ if (timing->emc_ctt_term_ctrl != last->emc_ctt_term_ctrl)
+ writel(timing->emc_auto_cal_interval,
+ emc->regs + EMC_AUTO_CAL_INTERVAL);
+
+ /* Restore dynamic self-refresh */
+ if (timing->emc_cfg & EMC_CFG_PWR_MASK)
+ writel(timing->emc_cfg, emc->regs + EMC_CFG);
+
+ /* Set ZCAL wait count */
+ writel(timing->emc_zcal_cnt_long, emc->regs + EMC_ZCAL_WAIT_CNT);
+
+ /* LPDDR3: Turn off BGBIAS if low frequency */
+ if (emc->dram_type == DRAM_TYPE_LPDDR3 &&
+ timing->emc_bgbias_ctl0 &
+ EMC_BGBIAS_CTL0_BIAS0_DSC_E_PWRD_IBIAS_RX) {
+ val = timing->emc_bgbias_ctl0;
+ val |= EMC_BGBIAS_CTL0_BIAS0_DSC_E_PWRD_IBIAS_VTTGEN;
+ val |= EMC_BGBIAS_CTL0_BIAS0_DSC_E_PWRD;
+ writel(val, emc->regs + EMC_BGBIAS_CTL0);
+ } else {
+ if (emc->dram_type == DRAM_TYPE_DDR3 &&
+ readl(emc->regs + EMC_BGBIAS_CTL0) !=
+ timing->emc_bgbias_ctl0) {
+ writel(timing->emc_bgbias_ctl0,
+ emc->regs + EMC_BGBIAS_CTL0);
+ }
+
+ writel(timing->emc_auto_cal_interval,
+ emc->regs + EMC_AUTO_CAL_INTERVAL);
+ }
+
+ /* Wait for timing to settle */
+ udelay(2);
+
+ /* Reprogram SEL_DPD_CTRL */
+ writel(timing->emc_sel_dpd_ctrl, emc->regs + EMC_SEL_DPD_CTRL);
+ emc_seq_update_timing(emc);
+
+ emc->last_timing = *timing;
+}
+
+/* Initialization and deinitialization */
+
+static void emc_read_current_timing(struct tegra_emc *emc,
+ struct emc_timing *timing)
+{
+ unsigned int i;
+
+ for (i = 0; i < ARRAY_SIZE(emc_burst_regs); ++i)
+ timing->emc_burst_data[i] =
+ readl(emc->regs + emc_burst_regs[i]);
+
+ timing->emc_cfg = readl(emc->regs + EMC_CFG);
+
+ timing->emc_auto_cal_interval = 0;
+ timing->emc_zcal_cnt_long = 0;
+ timing->emc_mode_1 = 0;
+ timing->emc_mode_2 = 0;
+ timing->emc_mode_4 = 0;
+ timing->emc_mode_reset = 0;
+}
+
+static int emc_init(struct tegra_emc *emc)
+{
+ emc->dram_type = readl(emc->regs + EMC_FBIO_CFG5);
+ emc->dram_type &= EMC_FBIO_CFG5_DRAM_TYPE_MASK;
+ emc->dram_type >>= EMC_FBIO_CFG5_DRAM_TYPE_SHIFT;
+
+ emc->dram_num = tegra_mc_get_emem_device_count(emc->mc);
+
+ emc_read_current_timing(emc, &emc->last_timing);
+
+ return 0;
+}
+
+static int load_one_timing_from_dt(struct tegra_emc *emc,
+ struct emc_timing *timing,
+ struct device_node *node)
+{
+ u32 value;
+ int err;
+
+ err = of_property_read_u32(node, "clock-frequency", &value);
+ if (err) {
+ dev_err(emc->dev, "timing %s: failed to read rate: %d\n",
+ node->name, err);
+ return err;
+ }
+
+ timing->rate = value;
+
+ err = of_property_read_u32_array(node, "nvidia,emc-configuration",
+ timing->emc_burst_data,
+ ARRAY_SIZE(timing->emc_burst_data));
+ if (err) {
+ dev_err(emc->dev,
+ "timing %s: failed to read emc burst data: %d\n",
+ node->name, err);
+ return err;
+ }
+
+#define EMC_READ_PROP(prop, dtprop) { \
+ err = of_property_read_u32(node, dtprop, &timing->prop); \
+ if (err) { \
+ dev_err(emc->dev, "timing %s: failed to read " #prop ": %d\n", \
+ node->name, err); \
+ return err; \
+ } \
+}
+
+ EMC_READ_PROP(emc_auto_cal_config, "nvidia,emc-auto-cal-config")
+ EMC_READ_PROP(emc_auto_cal_config2, "nvidia,emc-auto-cal-config2")
+ EMC_READ_PROP(emc_auto_cal_config3, "nvidia,emc-auto-cal-config3")
+ EMC_READ_PROP(emc_auto_cal_interval, "nvidia,emc-auto-cal-interval")
+ EMC_READ_PROP(emc_bgbias_ctl0, "nvidia,emc-bgbias-ctl0")
+ EMC_READ_PROP(emc_cfg, "nvidia,emc-cfg")
+ EMC_READ_PROP(emc_cfg_2, "nvidia,emc-cfg-2")
+ EMC_READ_PROP(emc_ctt_term_ctrl, "nvidia,emc-ctt-term-ctrl")
+ EMC_READ_PROP(emc_mode_1, "nvidia,emc-mode-1")
+ EMC_READ_PROP(emc_mode_2, "nvidia,emc-mode-2")
+ EMC_READ_PROP(emc_mode_4, "nvidia,emc-mode-4")
+ EMC_READ_PROP(emc_mode_reset, "nvidia,emc-mode-reset")
+ EMC_READ_PROP(emc_mrs_wait_cnt, "nvidia,emc-mrs-wait-cnt")
+ EMC_READ_PROP(emc_sel_dpd_ctrl, "nvidia,emc-sel-dpd-ctrl")
+ EMC_READ_PROP(emc_xm2dqspadctrl2, "nvidia,emc-xm2dqspadctrl2")
+ EMC_READ_PROP(emc_zcal_cnt_long, "nvidia,emc-zcal-cnt-long")
+ EMC_READ_PROP(emc_zcal_interval, "nvidia,emc-zcal-interval")
+
+#undef EMC_READ_PROP
+
+ return 0;
+}
+
+static int cmp_timings(const void *_a, const void *_b)
+{
+ const struct emc_timing *a = _a;
+ const struct emc_timing *b = _b;
+
+ if (a->rate < b->rate)
+ return -1;
+ else if (a->rate == b->rate)
+ return 0;
+ else
+ return 1;
+}
+
+static int tegra_emc_load_timings_from_dt(struct tegra_emc *emc,
+ struct device_node *node)
+{
+ int child_count = of_get_child_count(node);
+ struct device_node *child;
+ struct emc_timing *timing;
+ unsigned int i = 0;
+ int err;
+
+ emc->timings = devm_kcalloc(emc->dev, child_count, sizeof(*timing),
+ GFP_KERNEL);
+ if (!emc->timings)
+ return -ENOMEM;
+
+ emc->num_timings = child_count;
+
+ for_each_child_of_node(node, child) {
+ timing = &emc->timings[i++];
+
+ err = load_one_timing_from_dt(emc, timing, child);
+ if (err)
+ return err;
+ }
+
+ sort(emc->timings, emc->num_timings, sizeof(*timing), cmp_timings,
+ NULL);
+
+ return 0;
+}
+
+static const struct of_device_id tegra_emc_of_match[] = {
+ { .compatible = "nvidia,tegra124-emc" },
+ {}
+};
+
+static struct device_node *
+tegra_emc_find_node_by_ram_code(struct device_node *node, u32 ram_code)
+{
+ struct device_node *np;
+ int err;
+
+ for_each_child_of_node(node, np) {
+ u32 value;
+
+ err = of_property_read_u32(np, "nvidia,ram-code", &value);
+ if (err || (value != ram_code)) {
+ of_node_put(np);
+ continue;
+ }
+
+ return np;
+ }
+
+ return NULL;
+}
+
+/* Debugfs entry */
+
+static int emc_debug_rate_get(void *data, u64 *rate)
+{
+ struct clk *c = data;
+
+ *rate = clk_get_rate(c);
+
+ return 0;
+}
+
+static int emc_debug_rate_set(void *data, u64 rate)
+{
+ struct clk *c = data;
+
+ return clk_set_rate(c, rate);
+}
+
+DEFINE_SIMPLE_ATTRIBUTE(emc_debug_rate_fops, emc_debug_rate_get,
+ emc_debug_rate_set, "%lld\n");
+
+static void emc_debugfs_init(struct device *dev)
+{
+ struct dentry *root, *file;
+ struct clk *clk;
+
+ root = debugfs_create_dir("emc", NULL);
+ if (!root) {
+ dev_err(dev, "failed to create debugfs directory\n");
+ return;
+ }
+
+ clk = clk_get_sys("tegra-clk-debug", "emc");
+ if (IS_ERR(clk)) {
+ dev_err(dev, "failed to get debug clock: %ld\n", PTR_ERR(clk));
+ return;
+ }
+
+ file = debugfs_create_file("rate", S_IRUGO | S_IWUSR, root, clk,
+ &emc_debug_rate_fops);
+ if (!file)
+ dev_err(dev, "failed to create debugfs entry\n");
+}
+
+static int tegra_emc_probe(struct platform_device *pdev)
+{
+ struct platform_device *mc;
+ struct device_node *np;
+ struct tegra_emc *emc;
+ struct resource *res;
+ u32 ram_code;
+ int err;
+
+ emc = devm_kzalloc(&pdev->dev, sizeof(*emc), GFP_KERNEL);
+ if (!emc)
+ return -ENOMEM;
+
+ emc->dev = &pdev->dev;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ emc->regs = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(emc->regs))
+ return PTR_ERR(emc->regs);
+
+ np = of_parse_phandle(pdev->dev.of_node, "nvidia,memory-controller", 0);
+ if (!np) {
+ dev_err(&pdev->dev, "could not get memory controller\n");
+ return -ENOENT;
+ }
+
+ mc = of_find_device_by_node(np);
+ if (!mc)
+ return -ENOENT;
+
+ of_node_put(np);
+
+ emc->mc = platform_get_drvdata(mc);
+ if (!emc->mc)
+ return -EPROBE_DEFER;
+
+ ram_code = tegra_read_ram_code();
+
+ np = tegra_emc_find_node_by_ram_code(pdev->dev.of_node, ram_code);
+ if (!np) {
+ dev_err(&pdev->dev,
+ "no memory timings for RAM code %u found in DT\n",
+ ram_code);
+ return -ENOENT;
+ }
+
+ err = tegra_emc_load_timings_from_dt(emc, np);
+
+ of_node_put(np);
+
+ if (err)
+ return err;
+
+ if (emc->num_timings == 0) {
+ dev_err(&pdev->dev,
+ "no memory timings for RAM code %u registered\n",
+ ram_code);
+ return -ENOENT;
+ }
+
+ err = emc_init(emc);
+ if (err) {
+ dev_err(&pdev->dev, "EMC initialization failed: %d\n", err);
+ return err;
+ }
+
+ platform_set_drvdata(pdev, emc);
+
+ if (IS_ENABLED(CONFIG_DEBUG_FS))
+ emc_debugfs_init(&pdev->dev);
+
+ return 0;
+};
+
+static struct platform_driver tegra_emc_driver = {
+ .probe = tegra_emc_probe,
+ .driver = {
+ .name = "tegra-emc",
+ .of_match_table = tegra_emc_of_match,
+ .suppress_bind_attrs = true,
+ },
+};
+
+static int tegra_emc_init(void)
+{
+ return platform_driver_register(&tegra_emc_driver);
+}
+subsys_initcall(tegra_emc_init);
diff --git a/drivers/memory/tegra/tegra124.c b/drivers/memory/tegra/tegra124.c
index b996dfb9358b..966e1557e6f4 100644
--- a/drivers/memory/tegra/tegra124.c
+++ b/drivers/memory/tegra/tegra124.c
@@ -15,6 +15,48 @@
#include "mc.h"
+#define MC_EMEM_ARB_CFG 0x90
+#define MC_EMEM_ARB_OUTSTANDING_REQ 0x94
+#define MC_EMEM_ARB_TIMING_RCD 0x98
+#define MC_EMEM_ARB_TIMING_RP 0x9c
+#define MC_EMEM_ARB_TIMING_RC 0xa0
+#define MC_EMEM_ARB_TIMING_RAS 0xa4
+#define MC_EMEM_ARB_TIMING_FAW 0xa8
+#define MC_EMEM_ARB_TIMING_RRD 0xac
+#define MC_EMEM_ARB_TIMING_RAP2PRE 0xb0
+#define MC_EMEM_ARB_TIMING_WAP2PRE 0xb4
+#define MC_EMEM_ARB_TIMING_R2R 0xb8
+#define MC_EMEM_ARB_TIMING_W2W 0xbc
+#define MC_EMEM_ARB_TIMING_R2W 0xc0
+#define MC_EMEM_ARB_TIMING_W2R 0xc4
+#define MC_EMEM_ARB_DA_TURNS 0xd0
+#define MC_EMEM_ARB_DA_COVERS 0xd4
+#define MC_EMEM_ARB_MISC0 0xd8
+#define MC_EMEM_ARB_MISC1 0xdc
+#define MC_EMEM_ARB_RING1_THROTTLE 0xe0
+
+static const unsigned long tegra124_mc_emem_regs[] = {
+ MC_EMEM_ARB_CFG,
+ MC_EMEM_ARB_OUTSTANDING_REQ,
+ MC_EMEM_ARB_TIMING_RCD,
+ MC_EMEM_ARB_TIMING_RP,
+ MC_EMEM_ARB_TIMING_RC,
+ MC_EMEM_ARB_TIMING_RAS,
+ MC_EMEM_ARB_TIMING_FAW,
+ MC_EMEM_ARB_TIMING_RRD,
+ MC_EMEM_ARB_TIMING_RAP2PRE,
+ MC_EMEM_ARB_TIMING_WAP2PRE,
+ MC_EMEM_ARB_TIMING_R2R,
+ MC_EMEM_ARB_TIMING_W2W,
+ MC_EMEM_ARB_TIMING_R2W,
+ MC_EMEM_ARB_TIMING_W2R,
+ MC_EMEM_ARB_DA_TURNS,
+ MC_EMEM_ARB_DA_COVERS,
+ MC_EMEM_ARB_MISC0,
+ MC_EMEM_ARB_MISC1,
+ MC_EMEM_ARB_RING1_THROTTLE
+};
+
static const struct tegra_mc_client tegra124_mc_clients[] = {
{
.id = 0x00,
@@ -991,6 +1033,8 @@ const struct tegra_mc_soc tegra124_mc_soc = {
.num_address_bits = 34,
.atom_size = 32,
.smmu = &tegra124_smmu_soc,
+ .emem_regs = tegra124_mc_emem_regs,
+ .num_emem_regs = ARRAY_SIZE(tegra124_mc_emem_regs),
};
#endif /* CONFIG_ARCH_TEGRA_124_SOC */
diff --git a/include/soc/tegra/emc.h b/include/soc/tegra/emc.h
new file mode 100644
index 000000000000..f6db33b579ec
--- /dev/null
+++ b/include/soc/tegra/emc.h
@@ -0,0 +1,19 @@
+/*
+ * Copyright (c) 2014 NVIDIA Corporation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef __SOC_TEGRA_EMC_H__
+#define __SOC_TEGRA_EMC_H__
+
+struct tegra_emc;
+
+int tegra_emc_prepare_timing_change(struct tegra_emc *emc,
+ unsigned long rate);
+void tegra_emc_complete_timing_change(struct tegra_emc *emc,
+ unsigned long rate);
+
+#endif /* __SOC_TEGRA_EMC_H__ */
diff --git a/include/soc/tegra/mc.h b/include/soc/tegra/mc.h
index e5ba518aaece..1ab2813273cd 100644
--- a/include/soc/tegra/mc.h
+++ b/include/soc/tegra/mc.h
@@ -20,6 +20,12 @@ struct tegra_smmu_enable {
unsigned int bit;
};
+struct tegra_mc_timing {
+ unsigned long rate;
+
+ u32 *emem_data;
+};
+
/* latency allowance */
struct tegra_mc_la {
unsigned int reg;
@@ -90,7 +96,7 @@ struct tegra_mc_soc {
const struct tegra_mc_client *clients;
unsigned int num_clients;
- const unsigned int *emem_regs;
+ const unsigned long *emem_regs;
unsigned int num_emem_regs;
unsigned int num_address_bits;
@@ -108,6 +114,12 @@ struct tegra_mc {
const struct tegra_mc_soc *soc;
unsigned long tick;
+
+ struct tegra_mc_timing *timings;
+ unsigned int num_timings;
};
+void tegra_mc_write_emem_configuration(struct tegra_mc *mc, unsigned long rate);
+unsigned int tegra_mc_get_emem_device_count(struct tegra_mc *mc);
+
#endif /* __SOC_TEGRA_MC_H__ */

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