[dv,spi] Set strong drive strength and fast slew rate for SPI pads

Signed-off-by: Sharon Topaz <[email protected]> [dv,spi] fix lint issues Signed-off-by: Sharon Topaz <[email protected]> [dv,spi] Add kDeviceSimDV, kDeviceSilicon constraints Signed-off-by: Sharon Topaz <[email protected]>
lowRISC · Sep 18, 2024 · 44b3377 · 44b3377
1 parent e93d0ee
commit 44b3377
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Showing 3 changed files with 91 additions and 6 deletions.
diff --git a/sw/device/tests/power_virus_systemtest.c b/sw/device/tests/power_virus_systemtest.c
@@ -1454,6 +1454,48 @@ bool test_main(void) {
   if (kDeviceType == kDeviceSimDV || kDeviceType == kDeviceSimVerilator) {
     configure_pinmux_sim();
   }
+
+  // Set pads attributes for SPI passthrough mode
+  dif_pinmux_pad_attr_t out_attr;
+  dif_pinmux_pad_attr_t in_attr = {
+      .slew_rate = 1,
+      .drive_strength = 3,
+      .flags = kDifPinmuxPadAttrPullResistorEnable |
+               kDifPinmuxPadAttrPullResistorUp};
+  // spi host0
+  CHECK_DIF_OK(
+      dif_pinmux_pad_write_attrs(&pinmux, kTopEarlgreyDirectPadsSpiHost0Sck,
+                                 kDifPinmuxPadKindDio, in_attr, &out_attr));
+  CHECK_DIF_OK(
+      dif_pinmux_pad_write_attrs(&pinmux, kTopEarlgreyDirectPadsSpiHost0Sd0,
+                                 kDifPinmuxPadKindDio, in_attr, &out_attr));
+  CHECK_DIF_OK(
+      dif_pinmux_pad_write_attrs(&pinmux, kTopEarlgreyDirectPadsSpiHost0Sd1,
+                                 kDifPinmuxPadKindDio, in_attr, &out_attr));
+
+  CHECK_DIF_OK(
+      dif_pinmux_pad_write_attrs(&pinmux, kTopEarlgreyDirectPadsSpiHost0Sd2,
+                                 kDifPinmuxPadKindDio, in_attr, &out_attr));
+
+  CHECK_DIF_OK(
+      dif_pinmux_pad_write_attrs(&pinmux, kTopEarlgreyDirectPadsSpiHost0Sd3,
+                                 kDifPinmuxPadKindDio, in_attr, &out_attr));
+  // spi device
+  CHECK_DIF_OK(
+      dif_pinmux_pad_write_attrs(&pinmux, kTopEarlgreyDirectPadsSpiDeviceSd0,
+                                 kDifPinmuxPadKindDio, in_attr, &out_attr));
+  CHECK_DIF_OK(
+      dif_pinmux_pad_write_attrs(&pinmux, kTopEarlgreyDirectPadsSpiDeviceSd1,
+                                 kDifPinmuxPadKindDio, in_attr, &out_attr));
+
+  CHECK_DIF_OK(
+      dif_pinmux_pad_write_attrs(&pinmux, kTopEarlgreyDirectPadsSpiDeviceSd2,
+                                 kDifPinmuxPadKindDio, in_attr, &out_attr));
+
+  CHECK_DIF_OK(
+      dif_pinmux_pad_write_attrs(&pinmux, kTopEarlgreyDirectPadsSpiDeviceSd3,
+                                 kDifPinmuxPadKindDio, in_attr, &out_attr));
+
   // Clear GPIO pin 0 (max power indicator pin).
   CHECK_DIF_OK(
       dif_gpio_output_set_enabled(&gpio, /*pin=*/0, kDifToggleEnabled));

diff --git a/sw/device/tests/sim_dv/spi_host_tx_rx_test.c b/sw/device/tests/sim_dv/spi_host_tx_rx_test.c
@@ -147,11 +147,11 @@ void init_spi_host(dif_spi_host_t *spi_host,
  * This peripheral is 'direct' connected to the pads.
  */
 void setup_pads_spi_host0(void) {
-  // set weak pull-ups for all the pads
+  // set weak pull-ups, fast slew rate and strong drive strengh for all the pads
   dif_pinmux_pad_attr_t out_attr;
   dif_pinmux_pad_attr_t in_attr = {
-      .slew_rate = 0,
-      .drive_strength = 0,
+      .slew_rate = 1,
+      .drive_strength = 3,
       .flags = kDifPinmuxPadAttrPullResistorEnable |
                kDifPinmuxPadAttrPullResistorUp};
   for (uint32_t i = 0; i <= ARRAYSIZE(spi_host0_direct_pads); ++i) {
@@ -167,11 +167,11 @@ void setup_pads_spi_host0(void) {
  * This peripheral is 'muxed', so configure the pinmux as well as pads.
  */
 void setup_pinmux_pads_spi_host1(void) {
-  // Set weak pull-ups for the pads
+  // Set weak pull-ups, fast slew rate and strong drive strengh for the pads
   dif_pinmux_pad_attr_t out_attr;
   dif_pinmux_pad_attr_t in_attr = {
-      .slew_rate = 0,
-      .drive_strength = 0,
+      .slew_rate = 1,
+      .drive_strength = 3,
       // set weak pull-ups for all the pads
       .flags = kDifPinmuxPadAttrPullResistorEnable |
                kDifPinmuxPadAttrPullResistorUp};

diff --git a/sw/device/tests/sim_dv/spi_passthrough_test.c b/sw/device/tests/sim_dv/spi_passthrough_test.c
@@ -377,6 +377,49 @@ bool test_main(void) {
         dif_pinmux_output_select(&pinmux, setting.pad, setting.peripheral));
   }
 
+  if (kDeviceType == kDeviceSilicon || kDeviceType == kDeviceSimDV) {
+    // Set fast slew rate and strong drive strengh for SPI pads
+    dif_pinmux_pad_attr_t out_attr;
+    dif_pinmux_pad_attr_t in_attr = {
+        .slew_rate = 1,
+        .drive_strength = 3,
+        .flags = kDifPinmuxPadAttrPullResistorEnable |
+                 kDifPinmuxPadAttrPullResistorUp};
+
+    CHECK_DIF_OK(
+        dif_pinmux_pad_write_attrs(&pinmux, kTopEarlgreyDirectPadsSpiHost0Sck,
+                                   kDifPinmuxPadKindDio, in_attr, &out_attr));
+    CHECK_DIF_OK(
+        dif_pinmux_pad_write_attrs(&pinmux, kTopEarlgreyDirectPadsSpiHost0Sd0,
+                                   kDifPinmuxPadKindDio, in_attr, &out_attr));
+    CHECK_DIF_OK(
+        dif_pinmux_pad_write_attrs(&pinmux, kTopEarlgreyDirectPadsSpiHost0Sd1,
+                                   kDifPinmuxPadKindDio, in_attr, &out_attr));
+
+    CHECK_DIF_OK(
+        dif_pinmux_pad_write_attrs(&pinmux, kTopEarlgreyDirectPadsSpiHost0Sd2,
+                                   kDifPinmuxPadKindDio, in_attr, &out_attr));
+
+    CHECK_DIF_OK(
+        dif_pinmux_pad_write_attrs(&pinmux, kTopEarlgreyDirectPadsSpiHost0Sd3,
+                                   kDifPinmuxPadKindDio, in_attr, &out_attr));
+    // Spi_Device
+    CHECK_DIF_OK(
+        dif_pinmux_pad_write_attrs(&pinmux, kTopEarlgreyDirectPadsSpiDeviceSd0,
+                                   kDifPinmuxPadKindDio, in_attr, &out_attr));
+    CHECK_DIF_OK(
+        dif_pinmux_pad_write_attrs(&pinmux, kTopEarlgreyDirectPadsSpiDeviceSd1,
+                                   kDifPinmuxPadKindDio, in_attr, &out_attr));
+
+    CHECK_DIF_OK(
+        dif_pinmux_pad_write_attrs(&pinmux, kTopEarlgreyDirectPadsSpiDeviceSd2,
+                                   kDifPinmuxPadKindDio, in_attr, &out_attr));
+
+    CHECK_DIF_OK(
+        dif_pinmux_pad_write_attrs(&pinmux, kTopEarlgreyDirectPadsSpiDeviceSd3,
+                                   kDifPinmuxPadKindDio, in_attr, &out_attr));
+  }
+
   // Initialize the PLIC.
   CHECK_DIF_OK(dif_rv_plic_init(
       mmio_region_from_addr(TOP_EARLGREY_RV_PLIC_BASE_ADDR), &rv_plic));