Merge https://gitlab.denx.de/u-boot/custodians/u-boot-x86

- Various minor fixes for x86
- Switch to ACPI mode on Intel edison
- Support run-time configuration for NS16550 driver
- Update coreboot and slimbootloader serial drivers to use NS16550
run-time configuration
- ICH SPI driver fixes to hardware sequencing erase case
- Move ITSS from Apollo Lake to a more generic location
- Intel GPIO driver bug fixes
- Move to vs2017-win2016 platform build host for Azure pipelines

4 files changed, 150 insertions, 8 deletions

diff --git a/drivers/serial/Kconfig b/drivers/serial/Kconfig
index bd95f70b61..cd2e098883 100644
--- a/drivers/serial/Kconfig
+++ b/drivers/serial/Kconfig
@@ -542,6 +542,17 @@ config BCM6345_SERIAL
 	help
 	  Select this to enable UART on BCM6345 SoCs.
 
+config COREBOOT_SERIAL
+	bool "Coreboot UART support"
+	depends on DM_SERIAL
+	default y if SYS_COREBOOT
+	select SYS_NS16550
+	help
+	  Select this to enable a ns16550-style UART where the platform data
+	  comes from the coreboot 'sysinfo' tables. This allows U-Boot to have
+	  a serial console on any platform without needing to change the
+	  device tree, etc.
+
 config FSL_LINFLEXUART
 	bool "Freescale Linflex UART support"
 	depends on DM_SERIAL
@@ -601,6 +612,27 @@ config SYS_NS16550
 	  be used. It can be a constant or a function to get clock, eg,
 	  get_serial_clock().
 
+config NS16550_DYNAMIC
+	bool "Allow NS16550 to be configured at runtime"
+	default y if SYS_COREBOOT || SYS_SLIMBOOTLOADER
+	help
+	  Enable this option to allow device-tree control of the driver.
+
+	  Normally this driver is controlled by the following options:
+
+	  CONFIG_SYS_NS16550_PORT_MAPPED - indicates that port I/O is used for
+	     access. If not enabled, then the UART is memory-mapped.
+	  CONFIG_SYS_NS16550_MEM32 - if memory-mapped, indicates that 32-bit
+	     access should be used (instead of 8-bit)
+	  CONFIG_SYS_NS16550_REG_SIZE - indicates register width and also
+	     endianness. If positive, big-endian access is used. If negative,
+	     little-endian is used.
+
+	  It is not a good practice for a driver to be statically configured,
+	  since it prevents the same driver being used for different types of
+	  UARTs in a system. This option avoids this problem at the cost of a
+	  slightly increased code size.
+
 config INTEL_MID_SERIAL
 	bool "Intel MID platform UART support"
 	depends on DM_SERIAL && OF_CONTROL
diff --git a/drivers/serial/Makefile b/drivers/serial/Makefile
index 06ee30697d..76b1811510 100644
--- a/drivers/serial/Makefile
+++ b/drivers/serial/Makefile
@@ -35,6 +35,7 @@ obj-$(CONFIG_AR933X_UART) += serial_ar933x.o
 obj-$(CONFIG_ARM_DCC) += arm_dcc.o
 obj-$(CONFIG_ATMEL_USART) += atmel_usart.o
 obj-$(CONFIG_BCM6345_SERIAL) += serial_bcm6345.o
+obj-$(CONFIG_COREBOOT_SERIAL) += serial_coreboot.o
 obj-$(CONFIG_EFI_APP) += serial_efi.o
 obj-$(CONFIG_LPC32XX_HSUART) += lpc32xx_hsuart.o
 obj-$(CONFIG_MCFUART) += mcfuart.o
diff --git a/drivers/serial/ns16550.c b/drivers/serial/ns16550.c
index 9851663dc5..31f6cfe421 100644
--- a/drivers/serial/ns16550.c
+++ b/drivers/serial/ns16550.c
@@ -93,19 +93,79 @@ static inline int serial_in_shift(void *addr, int shift)
 #define CONFIG_SYS_NS16550_CLK  0
 #endif
 
+/*
+ * Use this #ifdef for now since many platforms don't define in(), out(),
+ * out_le32(), etc. but we don't have #defines to indicate this.
+ *
+ * TODO(sjg@chromium.org): Add CONFIG options to indicate what I/O is available
+ * on a platform
+ */
+#ifdef CONFIG_NS16550_DYNAMIC
+static void serial_out_dynamic(struct ns16550_platdata *plat, u8 *addr,
+			       int value)
+{
+	if (plat->flags & NS16550_FLAG_IO) {
+		outb(value, addr);
+	} else if (plat->reg_width == 4) {
+		if (plat->flags & NS16550_FLAG_ENDIAN) {
+			if (plat->flags & NS16550_FLAG_BE)
+				out_be32(addr, value);
+			else
+				out_le32(addr, value);
+		} else {
+			writel(value, addr);
+		}
+	} else if (plat->flags & NS16550_FLAG_BE) {
+		writeb(value, addr + (1 << plat->reg_shift) - 1);
+	} else {
+		writeb(value, addr);
+	}
+}
+
+static int serial_in_dynamic(struct ns16550_platdata *plat, u8 *addr)
+{
+	if (plat->flags & NS16550_FLAG_IO) {
+		return inb(addr);
+	} else if (plat->reg_width == 4) {
+		if (plat->flags & NS16550_FLAG_ENDIAN) {
+			if (plat->flags & NS16550_FLAG_BE)
+				return in_be32(addr);
+			else
+				return in_le32(addr);
+		} else {
+			return readl(addr);
+		}
+	} else if (plat->flags & NS16550_FLAG_BE) {
+		return readb(addr + (1 << plat->reg_shift) - 1);
+	} else {
+		return readb(addr);
+	}
+}
+#else
+static inline void serial_out_dynamic(struct ns16550_platdata *plat, u8 *addr,
+				      int value)
+{
+}
+
+static inline int serial_in_dynamic(struct ns16550_platdata *plat, u8 *addr)
+{
+	return 0;
+}
+
+#endif /* CONFIG_NS16550_DYNAMIC */
+
 static void ns16550_writeb(NS16550_t port, int offset, int value)
 {
 	struct ns16550_platdata *plat = port->plat;
 	unsigned char *addr;
 
 	offset *= 1 << plat->reg_shift;
-	addr = (unsigned char *)plat->base + offset;
+	addr = (unsigned char *)plat->base + offset + plat->reg_offset;
 
-	/*
-	 * As far as we know it doesn't make sense to support selection of
-	 * these options at run-time, so use the existing CONFIG options.
-	 */
-	serial_out_shift(addr + plat->reg_offset, plat->reg_shift, value);
+	if (IS_ENABLED(CONFIG_NS16550_DYNAMIC))
+		serial_out_dynamic(plat, addr, value);
+	else
+		serial_out_shift(addr, plat->reg_shift, value);
 }
 
 static int ns16550_readb(NS16550_t port, int offset)
@@ -114,9 +174,12 @@ static int ns16550_readb(NS16550_t port, int offset)
 	unsigned char *addr;
 
 	offset *= 1 << plat->reg_shift;
-	addr = (unsigned char *)plat->base + offset;
+	addr = (unsigned char *)plat->base + offset + plat->reg_offset;
 
-	return serial_in_shift(addr + plat->reg_offset, plat->reg_shift);
+	if (IS_ENABLED(CONFIG_NS16550_DYNAMIC))
+		return serial_in_dynamic(plat, addr);
+	else
+		return serial_in_shift(addr, plat->reg_shift);
 }
 
 static u32 ns16550_getfcr(NS16550_t port)
diff --git a/drivers/serial/serial_coreboot.c b/drivers/serial/serial_coreboot.c
new file mode 100644
index 0000000000..ccab347514
--- /dev/null
+++ b/drivers/serial/serial_coreboot.c
@@ -0,0 +1,46 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * UART support for U-Boot when launched from Coreboot
+ *
+ * Copyright 2019 Google LLC
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <ns16550.h>
+#include <serial.h>
+#include <asm/arch/sysinfo.h>
+
+static int coreboot_ofdata_to_platdata(struct udevice *dev)
+{
+	struct ns16550_platdata *plat = dev_get_platdata(dev);
+	struct cb_serial *cb_info = lib_sysinfo.serial;
+
+	plat->base = cb_info->baseaddr;
+	plat->reg_shift = cb_info->regwidth == 4 ? 2 : 0;
+	plat->reg_width = cb_info->regwidth;
+	plat->clock = cb_info->input_hertz;
+	plat->fcr = UART_FCR_DEFVAL;
+	plat->flags = 0;
+	if (cb_info->type == CB_SERIAL_TYPE_IO_MAPPED)
+		plat->flags |= NS16550_FLAG_IO;
+
+	return 0;
+}
+
+static const struct udevice_id coreboot_serial_ids[] = {
+	{ .compatible = "coreboot-serial" },
+	{ },
+};
+
+U_BOOT_DRIVER(coreboot_uart) = {
+	.name	= "coreboot_uart",
+	.id	= UCLASS_SERIAL,
+	.of_match	= coreboot_serial_ids,
+	.priv_auto_alloc_size = sizeof(struct NS16550),
+	.platdata_auto_alloc_size = sizeof(struct ns16550_platdata),
+	.ofdata_to_platdata  = coreboot_ofdata_to_platdata,
+	.probe	= ns16550_serial_probe,
+	.ops	= &ns16550_serial_ops,
+	.flags	= DM_FLAG_PRE_RELOC,
+};