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-govindr...@ti.com>
---
drivers/ram/k3-ddrss/k3-ddrss.c | 158 ++++++++++++++++++++++++++++++++
1 file changed, 158 insertions(+)
diff --git a/drivers/ram/k3-ddrss/k3-ddrss.c b/drivers/ram/k3-ddrss/k3-ddrss.c
index 96084d0b83d9..25e3976e6569 100644
--- a/drivers/ram/k3-ddrss/k3-ddrss.c
+++ b/drivers/ram/k3-ddrss/k3-ddrss.c
@@ -33,6 +33,75 @@
#define SINGLE_DDR_SUBSYSTEM 0x1
#define MULTI_DDR_SUBSYSTEM 0x2
+#define MULTI_DDR_CFG0 0x00114100
+#define MULTI_DDR_CFG1 0x00114104
+#define DDR_CFG_LOAD 0x00114110
+
+enum intrlv_gran {
+ GRAN_128B,
+ GRAN_512B,
+ GRAN_2KB,
+ GRAN_4KB,
+ GRAN_16KB,
+ GRAN_32KB,
+ GRAN_512KB,
+ GRAN_1GB,
+ GRAN_1_5GB,
+ GRAN_2GB,
+ GRAN_3GB,
+ GRAN_4GB,
+ GRAN_6GB,
+ GRAN_8GB,
+ GRAN_16GB
+};
+
+enum intrlv_size {
+ SIZE_0,
+ SIZE_128MB,
+ SIZE_256MB,
+ SIZE_512MB,
+ SIZE_1GB,
+ SIZE_2GB,
+ SIZE_3GB,
+ SIZE_4GB,
+ SIZE_6GB,
+ SIZE_8GB,
+ SIZE_12GB,
+ SIZE_16GB,
+ SIZE_32GB
+};
+
+struct k3_ddrss_data {
+ u32 flags;
+};
+
+enum ecc_enable {
+ DISABLE_ALL = 0,
+ ENABLE_0,
+ ENABLE_1,
+ ENABLE_ALL
+};
+
+enum emif_config {
+ INTERLEAVE_ALL = 0,
+ SEPR0,
+ SEPR1
+};
+
+enum emif_active {
+ EMIF_0 = 1,
+ EMIF_1,
+ EMIF_ALL
+};
+
+struct k3_msmc {
+ enum intrlv_gran gran;
+ enum intrlv_size size;
+ enum ecc_enable enable;
+ enum emif_config config;
+ enum emif_active active;
+};
+
struct k3_ddrss_desc {
struct udevice *dev;
void __iomem *ddrss_ss_cfg;
@@ -512,3 +581,92 @@ U_BOOT_DRIVER(k3_ddrss) = {
.probe = k3_ddrss_probe,
.priv_auto = sizeof(struct k3_ddrss_desc),
};
+
+static int k3_msmc_set_config(struct k3_msmc *msmc)
+{
+ u32 ddr_cfg0 = 0;
+ u32 ddr_cfg1 = 0;
+
+ ddr_cfg0 |= msmc->gran << 24;
+ ddr_cfg0 |= msmc->size << 16;
+ /* heartbeat_per, bit[4:0] setting to 3 is advisable */
+ ddr_cfg0 |= 3;
+
+ /* Program MULTI_DDR_CFG0 */
+ writel(ddr_cfg0, MULTI_DDR_CFG0);
+
+ ddr_cfg1 |= msmc->enable << 16;
+ ddr_cfg1 |= msmc->config << 8;
+ ddr_cfg1 |= msmc->active;
+
+ /* Program MULTI_DDR_CFG1 */
+ writel(ddr_cfg1, MULTI_DDR_CFG1);
+
+ /* Program DDR_CFG_LOAD */
+ writel(0x60000000, DDR_CFG_LOAD);
+
+ return 0;
+}
+
+static int k3_msmc_probe(struct udevice *dev)
+{
+ struct k3_msmc *msmc = dev_get_priv(dev);
+ int ret = 0;
+
+ /* Read the granular size from DT */
+ ret = dev_read_u32(dev, "intrlv-gran", &msmc->gran);
+ if (ret) {
+ dev_err(dev, "missing intrlv-gran property");
+ return -EINVAL;
+ }
+
+ /* Read the interleave region from DT */
+ ret = dev_read_u32(dev, "intrlv-size", &msmc->size);
+ if (ret) {
+ dev_err(dev, "missing intrlv-size property");
+ return -EINVAL;
+ }
+
+ /* Read ECC enable config */
+ ret = dev_read_u32(dev, "ecc-enable", &msmc->enable);
+ if (ret) {
+ dev_err(dev, "missing ecc-enable property");
+ return -EINVAL;
+ }
+
+ /* Read EMIF configuration */
+ ret = dev_read_u32(dev, "emif-config", &msmc->config);
+ if (ret) {
+ dev_err(dev, "missing emif-config property");
+ return -EINVAL;
+ }
+
+ /* Read EMIF active */
+ ret = dev_read_u32(dev, "emif-active", &msmc->active);
+ if (ret) {
+ dev_err(dev, "missing emif-active property");
+ return -EINVAL;
+ }
+
+ ret = k3_msmc_set_config(msmc);
+ if (ret) {
+ dev_err(dev, "error setting msmc config");
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static const struct udevice_id k3_msmc_ids[] = {
+ { .compatible = "ti,j721s2-msmc"},
+ {}
+};
+
+U_BOOT_DRIVER(k3_msmc) = {
+ .name = "k3_msmc",
+ .of_match = k3_msmc_ids,
+ .id = UCLASS_MISC,
+ .probe = k3_msmc_probe,
+ .priv_auto = sizeof(struct k3_msmc),
+ .flags = DM_FLAG_DEFAULT_PD_CTRL_OFF,
+};
--
2.17.1
