x86: broadwell: Add support for SDRAM setup
Broadwell uses a binary blob called the memory reference code (MRC) to start
up its SDRAM. This is similar to ivybridge so we can mostly use common code
for running this blob.
Signed-off-by: Simon Glass <sjg@chromium.org>
Acked-by: Bin Meng <bmeng.cn@gmail.com>
diff --git a/arch/x86/cpu/broadwell/sdram.c b/arch/x86/cpu/broadwell/sdram.c
new file mode 100644
index 0000000..4bf5d15
--- /dev/null
+++ b/arch/x86/cpu/broadwell/sdram.c
@@ -0,0 +1,307 @@
+/*
+ * Copyright (c) 2016 Google, Inc
+ *
+ * From coreboot src/soc/intel/broadwell/romstage/raminit.c
+ *
+ * SPDX-License-Identifier: GPL-2.0
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <pci.h>
+#include <syscon.h>
+#include <asm/cpu.h>
+#include <asm/io.h>
+#include <asm/lpc_common.h>
+#include <asm/mrccache.h>
+#include <asm/mrc_common.h>
+#include <asm/mtrr.h>
+#include <asm/pci.h>
+#include <asm/arch/iomap.h>
+#include <asm/arch/me.h>
+#include <asm/arch/pch.h>
+#include <asm/arch/pei_data.h>
+#include <asm/arch/pm.h>
+
+ulong board_get_usable_ram_top(ulong total_size)
+{
+ return mrc_common_board_get_usable_ram_top(total_size);
+}
+
+void dram_init_banksize(void)
+{
+ mrc_common_dram_init_banksize();
+}
+
+void broadwell_fill_pei_data(struct pei_data *pei_data)
+{
+ pei_data->pei_version = PEI_VERSION;
+ pei_data->board_type = BOARD_TYPE_ULT;
+ pei_data->pciexbar = MCFG_BASE_ADDRESS;
+ pei_data->smbusbar = SMBUS_BASE_ADDRESS;
+ pei_data->ehcibar = EARLY_EHCI_BAR;
+ pei_data->xhcibar = EARLY_XHCI_BAR;
+ pei_data->gttbar = EARLY_GTT_BAR;
+ pei_data->pmbase = ACPI_BASE_ADDRESS;
+ pei_data->gpiobase = GPIO_BASE_ADDRESS;
+ pei_data->tseg_size = CONFIG_SMM_TSEG_SIZE;
+ pei_data->temp_mmio_base = EARLY_TEMP_MMIO;
+ pei_data->tx_byte = sdram_console_tx_byte;
+ pei_data->ddr_refresh_2x = 1;
+}
+
+static inline void pei_data_usb2_port(struct pei_data *pei_data, int port,
+ uint16_t length, uint8_t enable,
+ uint8_t oc_pin, uint8_t location)
+{
+ pei_data->usb2_ports[port].length = length;
+ pei_data->usb2_ports[port].enable = enable;
+ pei_data->usb2_ports[port].oc_pin = oc_pin;
+ pei_data->usb2_ports[port].location = location;
+}
+
+static inline void pei_data_usb3_port(struct pei_data *pei_data, int port,
+ uint8_t enable, uint8_t oc_pin,
+ uint8_t fixed_eq)
+{
+ pei_data->usb3_ports[port].enable = enable;
+ pei_data->usb3_ports[port].oc_pin = oc_pin;
+ pei_data->usb3_ports[port].fixed_eq = fixed_eq;
+}
+
+void mainboard_fill_pei_data(struct pei_data *pei_data)
+{
+ /* DQ byte map for Samus board */
+ const u8 dq_map[2][6][2] = {
+ { { 0x0F, 0xF0 }, { 0x00, 0xF0 }, { 0x0F, 0xF0 },
+ { 0x0F, 0x00 }, { 0xFF, 0x00 }, { 0xFF, 0x00 } },
+ { { 0x0F, 0xF0 }, { 0x00, 0xF0 }, { 0x0F, 0xF0 },
+ { 0x0F, 0x00 }, { 0xFF, 0x00 }, { 0xFF, 0x00 } } };
+ /* DQS CPU<>DRAM map for Samus board */
+ const u8 dqs_map[2][8] = {
+ { 2, 0, 1, 3, 6, 4, 7, 5 },
+ { 2, 1, 0, 3, 6, 5, 4, 7 } };
+
+ pei_data->ec_present = 1;
+
+ /* One installed DIMM per channel */
+ pei_data->dimm_channel0_disabled = 2;
+ pei_data->dimm_channel1_disabled = 2;
+
+ memcpy(pei_data->dq_map, dq_map, sizeof(dq_map));
+ memcpy(pei_data->dqs_map, dqs_map, sizeof(dqs_map));
+
+ /* P0: HOST PORT */
+ pei_data_usb2_port(pei_data, 0, 0x0080, 1, 0,
+ USB_PORT_BACK_PANEL);
+ /* P1: HOST PORT */
+ pei_data_usb2_port(pei_data, 1, 0x0080, 1, 1,
+ USB_PORT_BACK_PANEL);
+ /* P2: RAIDEN */
+ pei_data_usb2_port(pei_data, 2, 0x0080, 1, USB_OC_PIN_SKIP,
+ USB_PORT_BACK_PANEL);
+ /* P3: SD CARD */
+ pei_data_usb2_port(pei_data, 3, 0x0040, 1, USB_OC_PIN_SKIP,
+ USB_PORT_INTERNAL);
+ /* P4: RAIDEN */
+ pei_data_usb2_port(pei_data, 4, 0x0080, 1, USB_OC_PIN_SKIP,
+ USB_PORT_BACK_PANEL);
+ /* P5: WWAN (Disabled) */
+ pei_data_usb2_port(pei_data, 5, 0x0000, 0, USB_OC_PIN_SKIP,
+ USB_PORT_SKIP);
+ /* P6: CAMERA */
+ pei_data_usb2_port(pei_data, 6, 0x0040, 1, USB_OC_PIN_SKIP,
+ USB_PORT_INTERNAL);
+ /* P7: BT */
+ pei_data_usb2_port(pei_data, 7, 0x0040, 1, USB_OC_PIN_SKIP,
+ USB_PORT_INTERNAL);
+
+ /* P1: HOST PORT */
+ pei_data_usb3_port(pei_data, 0, 1, 0, 0);
+ /* P2: HOST PORT */
+ pei_data_usb3_port(pei_data, 1, 1, 1, 0);
+ /* P3: RAIDEN */
+ pei_data_usb3_port(pei_data, 2, 1, USB_OC_PIN_SKIP, 0);
+ /* P4: RAIDEN */
+ pei_data_usb3_port(pei_data, 3, 1, USB_OC_PIN_SKIP, 0);
+}
+
+static unsigned long get_top_of_ram(struct udevice *dev)
+{
+ /*
+ * Base of DPR is top of usable DRAM below 4GiB. The register has
+ * 1 MiB alignment and reports the TOP of the range, the base
+ * must be calculated from the size in MiB in bits 11:4.
+ */
+ u32 dpr, tom;
+
+ dm_pci_read_config32(dev, DPR, &dpr);
+ tom = dpr & ~((1 << 20) - 1);
+
+ debug("dpt %08x tom %08x\n", dpr, tom);
+ /* Subtract DMA Protected Range size if enabled */
+ if (dpr & DPR_EPM)
+ tom -= (dpr & DPR_SIZE_MASK) << 16;
+
+ return (unsigned long)tom;
+}
+
+/**
+ * sdram_find() - Find available memory
+ *
+ * This is a bit complicated since on x86 there are system memory holes all
+ * over the place. We create a list of available memory blocks
+ *
+ * @dev: Northbridge device
+ */
+static int sdram_find(struct udevice *dev)
+{
+ struct memory_info *info = &gd->arch.meminfo;
+ ulong top_of_ram;
+
+ top_of_ram = get_top_of_ram(dev);
+ mrc_add_memory_area(info, 0, top_of_ram);
+
+ /* Add MTRRs for memory */
+ mtrr_add_request(MTRR_TYPE_WRBACK, 0, 2ULL << 30);
+
+ return 0;
+}
+
+static int prepare_mrc_cache(struct pei_data *pei_data)
+{
+ struct mrc_data_container *mrc_cache;
+ struct mrc_region entry;
+ int ret;
+
+ ret = mrccache_get_region(NULL, &entry);
+ if (ret)
+ return ret;
+ mrc_cache = mrccache_find_current(&entry);
+ if (!mrc_cache)
+ return -ENOENT;
+
+ pei_data->saved_data = mrc_cache->data;
+ pei_data->saved_data_size = mrc_cache->data_size;
+ debug("%s: at %p, size %x checksum %04x\n", __func__,
+ pei_data->saved_data, pei_data->saved_data_size,
+ mrc_cache->checksum);
+
+ return 0;
+}
+
+int reserve_arch(void)
+{
+ return mrccache_reserve();
+}
+
+int dram_init(void)
+{
+ struct pei_data _pei_data __aligned(8);
+ struct pei_data *pei_data = &_pei_data;
+ struct udevice *dev, *me_dev, *pch_dev;
+ struct chipset_power_state ps;
+ const void *spd_data;
+ int ret, size;
+
+ memset(pei_data, '\0', sizeof(struct pei_data));
+
+ /* Print ME state before MRC */
+ ret = syscon_get_by_driver_data(X86_SYSCON_ME, &me_dev);
+ if (ret)
+ return ret;
+ intel_me_status(me_dev);
+
+ /* Save ME HSIO version */
+ ret = uclass_first_device(UCLASS_PCH, &pch_dev);
+ if (ret)
+ return ret;
+ if (!pch_dev)
+ return -ENODEV;
+ power_state_get(pch_dev, &ps);
+
+ intel_me_hsio_version(me_dev, &ps.hsio_version, &ps.hsio_checksum);
+
+ broadwell_fill_pei_data(pei_data);
+ mainboard_fill_pei_data(pei_data);
+
+ ret = uclass_first_device(UCLASS_NORTHBRIDGE, &dev);
+ if (ret)
+ return ret;
+ if (!dev)
+ return -ENODEV;
+ size = 256;
+ ret = mrc_locate_spd(dev, size, &spd_data);
+ if (ret)
+ return ret;
+ memcpy(pei_data->spd_data[0][0], spd_data, size);
+ memcpy(pei_data->spd_data[1][0], spd_data, size);
+
+ ret = prepare_mrc_cache(pei_data);
+ if (ret)
+ debug("prepare_mrc_cache failed: %d\n", ret);
+
+ debug("PEI version %#x\n", pei_data->pei_version);
+ ret = mrc_common_init(dev, pei_data, true);
+ if (ret)
+ return ret;
+ debug("Memory init done\n");
+
+ ret = sdram_find(dev);
+ if (ret)
+ return ret;
+ gd->ram_size = gd->arch.meminfo.total_32bit_memory;
+ debug("RAM size %llx\n", (unsigned long long)gd->ram_size);
+
+ debug("MRC output data length %#x at %p\n", pei_data->data_to_save_size,
+ pei_data->data_to_save);
+ /* S3 resume: don't save scrambler seed or MRC data */
+ if (pei_data->boot_mode != SLEEP_STATE_S3) {
+ /*
+ * This will be copied to SDRAM in reserve_arch(), then written
+ * to SPI flash in mrccache_save()
+ */
+ gd->arch.mrc_output = (char *)pei_data->data_to_save;
+ gd->arch.mrc_output_len = pei_data->data_to_save_size;
+ }
+ gd->arch.pei_meminfo = pei_data->meminfo;
+
+ return 0;
+}
+
+/* Use this hook to save our SDRAM parameters */
+int misc_init_r(void)
+{
+ int ret;
+
+ ret = mrccache_save();
+ if (ret)
+ printf("Unable to save MRC data: %d\n", ret);
+ else
+ debug("Saved MRC cache data\n");
+
+ return 0;
+}
+
+void board_debug_uart_init(void)
+{
+ struct udevice *bus = NULL;
+
+ /* com1 / com2 decode range */
+ pci_x86_write_config(bus, PCH_DEV_LPC, LPC_IO_DEC, 1 << 4, PCI_SIZE_16);
+
+ pci_x86_write_config(bus, PCH_DEV_LPC, LPC_EN, COMA_LPC_EN,
+ PCI_SIZE_16);
+}
+
+static const struct udevice_id broadwell_syscon_ids[] = {
+ { .compatible = "intel,me", .data = X86_SYSCON_ME },
+ { .compatible = "intel,gma", .data = X86_SYSCON_GMA },
+ { }
+};
+
+U_BOOT_DRIVER(syscon_intel_me) = {
+ .name = "intel_me_syscon",
+ .id = UCLASS_SYSCON,
+ .of_match = broadwell_syscon_ids,
+};