x86: Add support for Intel Minnowboard Max

This is a relatively low-cost x86 board in a small form factor. The main
peripherals are uSD, USB, HDMI, Ethernet and SATA. It uses an Atom 3800
series CPU. So far only the dual core 2GB variant is supported.

This uses the existing FSP support. Binary blobs are required to make this
board work. The microcode update is included as a patch (all 3000 lines of
it).

Change-Id: I0088c47fe87cf08ae635b343d32c332269062156
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>

7 files changed, 337 insertions, 0 deletions

diff --git a/arch/x86/cpu/Makefile b/arch/x86/cpu/Makefile
index 62e43c0..5acf8bb 100644
--- a/arch/x86/cpu/Makefile
+++ b/arch/x86/cpu/Makefile
@@ -12,6 +12,7 @@ extra-y	= start.o
 obj-$(CONFIG_X86_RESET_VECTOR) += resetvec.o start16.o
 obj-y	+= interrupts.o cpu.o call64.o
 
+obj-$(CONFIG_INTEL_BAYTRAIL) += baytrail/
 obj-$(CONFIG_SYS_COREBOOT) += coreboot/
 obj-$(CONFIG_NORTHBRIDGE_INTEL_SANDYBRIDGE) += ivybridge/
 obj-$(CONFIG_NORTHBRIDGE_INTEL_IVYBRIDGE) += ivybridge/
diff --git a/arch/x86/cpu/baytrail/Kconfig b/arch/x86/cpu/baytrail/Kconfig
new file mode 100644
index 0000000..e86cc01
--- /dev/null
+++ b/arch/x86/cpu/baytrail/Kconfig
@@ -0,0 +1,9 @@
+#
+# Copyright (C) 2015 Google, Inc
+#
+# SPDX-License-Identifier:	GPL-2.0+
+#
+
+config INTEL_BAYTRAIL
+	bool
+	select HAVE_FSP
diff --git a/arch/x86/cpu/baytrail/Makefile b/arch/x86/cpu/baytrail/Makefile
new file mode 100644
index 0000000..8914e8b
--- /dev/null
+++ b/arch/x86/cpu/baytrail/Makefile
@@ -0,0 +1,10 @@
+#
+# Copyright (C) 2015 Google, Inc
+#
+# SPDX-License-Identifier:	GPL-2.0+
+#
+
+obj-y += early_uart.o
+obj-y += fsp_configs.o
+obj-y += pci.o
+obj-y += valleyview.o
diff --git a/arch/x86/cpu/baytrail/early_uart.c b/arch/x86/cpu/baytrail/early_uart.c
new file mode 100644
index 0000000..4199210
--- /dev/null
+++ b/arch/x86/cpu/baytrail/early_uart.c
@@ -0,0 +1,77 @@
+/*
+ * Copyright (C) 2015 Google, Inc
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <errno.h>
+#include <asm/io.h>
+
+#define PCI_DEV_CONFIG(segbus, dev, fn) ( \
+		(((segbus) & 0xfff) << 20) | \
+		(((dev) & 0x1f) << 15) | \
+		(((fn)  & 0x07) << 12))
+
+/* Platform Controller Unit */
+#define LPC_DEV			0x1f
+#define LPC_FUNC		0
+
+/* Enable UART */
+#define UART_CONT		0x80
+
+/* SCORE Pad definitions */
+#define UART_RXD_PAD			82
+#define UART_TXD_PAD			83
+
+/* Pad base: PAD_CONF0[n]= PAD_BASE + 16 * n */
+#define GPSCORE_PAD_BASE	(IO_BASE_ADDRESS + IO_BASE_OFFSET_GPSCORE)
+
+/* IO Memory */
+#define IO_BASE_ADDRESS			0xfed0c000
+#define  IO_BASE_OFFSET_GPSCORE		0x0000
+#define  IO_BASE_OFFSET_GPNCORE		0x1000
+#define  IO_BASE_OFFSET_GPSSUS		0x2000
+#define IO_BASE_SIZE			0x4000
+
+static inline unsigned int score_pconf0(int pad_num)
+{
+	return GPSCORE_PAD_BASE + pad_num * 16;
+}
+
+static void score_select_func(int pad, int func)
+{
+	uint32_t reg;
+	uint32_t pconf0_addr = score_pconf0(pad);
+
+	reg = readl(pconf0_addr);
+	reg &= ~0x7;
+	reg |= func & 0x7;
+	writel(reg, pconf0_addr);
+}
+
+static void pci_write_config32(int dev, unsigned int where, u32 value)
+{
+	unsigned long addr;
+
+	addr = CONFIG_PCIE_ECAM_BASE | dev | (where & ~3);
+	writel(value, addr);
+}
+
+/* This can be called after memory-mapped PCI is working */
+int setup_early_uart(void)
+{
+	/* Enable the legacy UART hardware. */
+	pci_write_config32(PCI_DEV_CONFIG(0, LPC_DEV, LPC_FUNC), UART_CONT, 1);
+
+	/*
+	 * Set up the pads to the UART function. This allows the signals to
+	 * leave the chip
+	 */
+	score_select_func(UART_RXD_PAD, 1);
+	score_select_func(UART_TXD_PAD, 1);
+
+	/* TODO(sjg@chromium.org): Call debug_uart_init() */
+
+	return 0;
+}
diff --git a/arch/x86/cpu/baytrail/fsp_configs.c b/arch/x86/cpu/baytrail/fsp_configs.c
new file mode 100644
index 0000000..86b6926
--- /dev/null
+++ b/arch/x86/cpu/baytrail/fsp_configs.c
@@ -0,0 +1,156 @@
+/*
+ * Copyright (C) 2013, Intel Corporation
+ * Copyright (C) 2014, Bin Meng <bmeng.cn@gmail.com>
+ *
+ * SPDX-License-Identifier:	Intel
+ */
+
+#include <common.h>
+#include <asm/arch/fsp/azalia.h>
+#include <asm/fsp/fsp_support.h>
+
+/* ALC262 Verb Table - 10EC0262 */
+static const uint32_t verb_table_data13[] = {
+	/* Pin Complex (NID 0x11) */
+	0x01171cf0,
+	0x01171d11,
+	0x01171e11,
+	0x01171f41,
+	/* Pin Complex (NID 0x12) */
+	0x01271cf0,
+	0x01271d11,
+	0x01271e11,
+	0x01271f41,
+	/* Pin Complex (NID 0x14) */
+	0x01471c10,
+	0x01471d40,
+	0x01471e01,
+	0x01471f01,
+	/* Pin Complex (NID 0x15) */
+	0x01571cf0,
+	0x01571d11,
+	0x01571e11,
+	0x01571f41,
+	/* Pin Complex (NID 0x16) */
+	0x01671cf0,
+	0x01671d11,
+	0x01671e11,
+	0x01671f41,
+	/* Pin Complex (NID 0x18) */
+	0x01871c20,
+	0x01871d98,
+	0x01871ea1,
+	0x01871f01,
+	/* Pin Complex (NID 0x19) */
+	0x01971c21,
+	0x01971d98,
+	0x01971ea1,
+	0x01971f02,
+	/* Pin Complex (NID 0x1A) */
+	0x01a71c2f,
+	0x01a71d30,
+	0x01a71e81,
+	0x01a71f01,
+	/* Pin Complex */
+	0x01b71c1f,
+	0x01b71d40,
+	0x01b71e21,
+	0x01b71f02,
+	/* Pin Complex */
+	0x01c71cf0,
+	0x01c71d11,
+	0x01c71e11,
+	0x01c71f41,
+	/* Pin Complex */
+	0x01d71c01,
+	0x01d71dc6,
+	0x01d71e14,
+	0x01d71f40,
+	/* Pin Complex */
+	0x01e71cf0,
+	0x01e71d11,
+	0x01e71e11,
+	0x01e71f41,
+	/* Pin Complex */
+	0x01f71cf0,
+	0x01f71d11,
+	0x01f71e11,
+	0x01f71f41,
+};
+
+/*
+ * This needs to be in ROM since if we put it in CAR, FSP init loses it when
+ * it drops CAR.
+ *
+ * TODO(sjg@chromium.org): Move to device tree when FSP allows it
+ *
+ * VerbTable: (RealTek ALC262)
+ * Revision ID = 0xFF, support all steps
+ * Codec Verb Table For AZALIA
+ * Codec Address: CAd value (0/1/2)
+ * Codec Vendor: 0x10EC0262
+ */
+static const struct pch_azalia_verb_table azalia_verb_table[] = {
+	{
+		{
+			0x10ec0262,
+			0x0000,
+			0xff,
+			0x01,
+			0x000b,
+			0x0002,
+		},
+		verb_table_data13
+	}
+};
+
+const struct pch_azalia_config azalia_config = {
+	.pme_enable = 1,
+	.docking_supported = 1,
+	.docking_attached = 0,
+	.hdmi_codec_enable = 1,
+	.azalia_v_ci_enable = 1,
+	.rsvdbits = 0,
+	.azalia_verb_table_num = 1,
+	.azalia_verb_table = azalia_verb_table,
+	.reset_wait_timer_us = 300
+};
+
+void update_fsp_upd(struct upd_region *fsp_upd)
+{
+	struct memory_down_data *mem;
+
+	/*
+	 * Configure everything here to avoid the poor hard-pressed user
+	 * needing to run Intel's binary configuration tool. It may also allow
+	 * us to support the 1GB single core variant easily.
+	 *
+	 * TODO(sjg@chromium.org): Move to device tree
+	 */
+	fsp_upd->mrc_init_tseg_size = 8;
+	fsp_upd->mrc_init_mmio_size = 0x800;
+	fsp_upd->emmc_boot_mode = 0xff;
+	fsp_upd->enable_sdio = 1;
+	fsp_upd->enable_sdcard = 1;
+	fsp_upd->enable_hsuart0 = 1;
+	fsp_upd->azalia_config_ptr = (uint32_t)&azalia_config;
+	fsp_upd->enable_i2_c0 = 0;
+	fsp_upd->enable_i2_c2 = 0;
+	fsp_upd->enable_i2_c3 = 0;
+	fsp_upd->enable_i2_c4 = 0;
+	fsp_upd->enable_xhci = 0;
+	fsp_upd->igd_render_standby = 1;
+
+	mem = &fsp_upd->memory_params;
+	mem->enable_memory_down = 1;
+	mem->dram_speed = 1;
+	mem->dimm_width = 1;
+	mem->dimm_density = 2;
+	mem->dimm_tcl = 0xb;
+	mem->dimm_trpt_rcd = 0xb;
+	mem->dimm_twr = 0xc;
+	mem->dimm_twtr = 6;
+	mem->dimm_trrd = 6;
+	mem->dimm_trtp = 6;
+	mem->dimm_tfaw = 0x14;
+}
diff --git a/arch/x86/cpu/baytrail/pci.c b/arch/x86/cpu/baytrail/pci.c
new file mode 100644
index 0000000..6c291f9
--- /dev/null
+++ b/arch/x86/cpu/baytrail/pci.c
@@ -0,0 +1,46 @@
+/*
+ * Copyright (C) 2014, Bin Meng <bmeng.cn@gmail.com>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <pci.h>
+#include <asm/pci.h>
+#include <asm/fsp/fsp_support.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+void board_pci_setup_hose(struct pci_controller *hose)
+{
+	hose->first_busno = 0;
+	hose->last_busno = 0;
+
+	/* PCI memory space */
+	pci_set_region(hose->regions + 0,
+		       CONFIG_PCI_MEM_BUS,
+		       CONFIG_PCI_MEM_PHYS,
+		       CONFIG_PCI_MEM_SIZE,
+		       PCI_REGION_MEM);
+
+	/* PCI IO space */
+	pci_set_region(hose->regions + 1,
+		       CONFIG_PCI_IO_BUS,
+		       CONFIG_PCI_IO_PHYS,
+		       CONFIG_PCI_IO_SIZE,
+		       PCI_REGION_IO);
+
+	pci_set_region(hose->regions + 2,
+		       CONFIG_PCI_PREF_BUS,
+		       CONFIG_PCI_PREF_PHYS,
+		       CONFIG_PCI_PREF_SIZE,
+		       PCI_REGION_PREFETCH);
+
+	pci_set_region(hose->regions + 3,
+		       0,
+		       0,
+		       gd->ram_size,
+		       PCI_REGION_MEM | PCI_REGION_SYS_MEMORY);
+
+	hose->region_count = 4;
+}
diff --git a/arch/x86/cpu/baytrail/valleyview.c b/arch/x86/cpu/baytrail/valleyview.c
new file mode 100644
index 0000000..a3e837d
--- /dev/null
+++ b/arch/x86/cpu/baytrail/valleyview.c
@@ -0,0 +1,38 @@
+/*
+ * Copyright (C) 2014, Bin Meng <bmeng.cn@gmail.com>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <mmc.h>
+#include <pci_ids.h>
+#include <asm/post.h>
+
+static struct pci_device_id mmc_supported[] = {
+	{ PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_VALLEYVIEW_SDIO },
+	{ PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_VALLEYVIEW_SDCARD },
+};
+
+int cpu_mmc_init(bd_t *bis)
+{
+	printf("mmc init\n");
+	return pci_mmc_init("ValleyView SDHCI", mmc_supported,
+			    ARRAY_SIZE(mmc_supported));
+}
+
+int arch_cpu_init(void)
+{
+	int ret;
+
+	post_code(POST_CPU_INIT);
+#ifdef CONFIG_SYS_X86_TSC_TIMER
+	timer_set_base(rdtsc());
+#endif
+
+	ret = x86_cpu_init_f();
+	if (ret)
+		return ret;
+
+	return 0;
+}