soc/intel/jasperlake: Add Jasper Lake SoC support

This is a copy patch from Tiger Lake SoC code.

The only changes done on top of copy is changing below configs:
1. SOC_INTEL_TIGERLAKE -> SOC_INTEL_TIGERLAKE_COPY
2. SOC_INTEL_JASPERLAKE -> SOC_INTEL_JASPERLAKE_COPY
3. SOC_INTEL_TIGERLAKE_BASE -> SOC_INTEL_TIGERLAKE_BASE_COPY

We started with initial assumption that JSL and TGL can co-exist.
But now we see the SoC code in Tiger Lake is relying on too many
compile-time directives to make two SoCs co-exist. Some of the
differences are listed below:

-> Kconfig: Multiple Kconfig options using
   if SOC_INTEL_{TIGERLAKE/JASPERLAKE}

-> GPIO: GPIO communities have their own differences.
   This requires conditional checks in gpio.asl, gpio.c, gpio*.h,
   pmc.h and gpio.asl

-> PCI IRQs: Set up differently for JSL and TGL

-> PCIe: Number of Root ports differ.

-> eMMC/SD: Only supported on JSL.

-> USB: Number of USB port are different for JSL and TGL.

-> Memory configuration parameters are different for JSL and TGL.

-> FSP parameters for JSL and TGL are different.

The split of JSL and TGL SoC code is planned as below:

1. Copy Tiger Lake SoC code as is, and change SoC Kconfig
   to avoid conflicts with current mainboard builds.

2. Clean up TGL code out of copy patch done in step 1.
   Make it JSL only code. The SoC config still kept as
   SOC_INTEL_JASPERLAKE_COPY.

3. Change JSL SOC Kconfig from SOC_INTEL_JASPERLAKE_COPY to
   SOC_INTEL_JASPERLAKE, dedede and jasperlake_rvp boards can
   bind to SoC code from soc/intel/jasperlake. This step establishes
   Jasper Lake as a separate SoC.

4. Clean up current JSL code from TGL code. This step establishes
   Tiger Lake as a separate SoC.

BUG=b:150217037

Change-Id: I9c33f478a2f8ed5e2d8e7815821d13044d35d388
Signed-off-by: Aamir Bohra <aamir.bohra@intel.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/39823
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Subrata Banik <subrata.banik@intel.com>
Reviewed-by: Furquan Shaikh <furquan@google.com>
Reviewed-by: Karthik Ramasubramanian <kramasub@google.com>

1 files changed, 75 insertions, 0 deletions

diff --git a/src/soc/intel/jasperlake/uart.c b/src/soc/intel/jasperlake/uart.c
new file mode 100644
index 0000000000..03b4469a98
--- /dev/null
+++ b/src/soc/intel/jasperlake/uart.c
@@ -0,0 +1,75 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * 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.
+ */
+
+/*
+ * This file is created based on Intel Tiger Lake Processor PCH Datasheet
+ * Document number: 575857
+ * Chapter number: 9
+ */
+
+#include <console/console.h>
+#include <device/pci_def.h>
+#include <intelblocks/gpio.h>
+#include <intelblocks/lpss.h>
+#include <intelblocks/pcr.h>
+#include <intelblocks/uart.h>
+#include <soc/iomap.h>
+#include <soc/pch.h>
+#include <soc/pci_devs.h>
+#include <soc/pcr_ids.h>
+
+const struct uart_gpio_pad_config uart_gpio_pads[] = {
+	{
+		.console_index = 0,
+		.gpios = {
+			PAD_CFG_NF(GPP_C8, NONE, DEEP, NF1), /* UART0 RX */
+			PAD_CFG_NF(GPP_C9, NONE, DEEP, NF1), /* UART0 TX */
+		},
+	},
+	{
+		.console_index = 1,
+		.gpios = {
+			PAD_CFG_NF(GPP_C12, NONE, DEEP, NF1), /* UART1 RX */
+			PAD_CFG_NF(GPP_C13, NONE, DEEP, NF1), /* UART1 TX */
+		},
+	},
+	{
+		.console_index = 2,
+		.gpios = {
+			PAD_CFG_NF(GPP_C20, NONE, DEEP, NF1), /* UART2 RX */
+			PAD_CFG_NF(GPP_C21, NONE, DEEP, NF1), /* UART2 TX */
+		},
+	}
+};
+
+const int uart_max_index = ARRAY_SIZE(uart_gpio_pads);
+
+DEVTREE_CONST struct device *soc_uart_console_to_device(int uart_console)
+{
+	/*
+	 * if index is valid, this function will return corresponding structure
+	 * for uart console else will return NULL.
+	 */
+	switch (uart_console) {
+	case 0:
+		return pcidev_path_on_root(PCH_DEVFN_UART0);
+	case 1:
+		return pcidev_path_on_root(PCH_DEVFN_UART1);
+	case 2:
+		return pcidev_path_on_root(PCH_DEVFN_UART2);
+	default:
+		printk(BIOS_ERR, "Invalid UART console index\n");
+		return NULL;
+	}
+}