upstream u-boot with additional patches for our devices/boards:
https://lists.denx.de/pipermail/u-boot/2017-March/282789.html (AXP crashes) ;
Gbit ethernet patch for some LIME2 revisions ;
with SPI flash support
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540 lines
14 KiB
540 lines
14 KiB
/*
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* Copyright (c) 2016 Google, Inc
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*
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* SPDX-License-Identifier: GPL-2.0
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*/
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#include <common.h>
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#include <dm.h>
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#include <pch.h>
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#include <asm/cpu.h>
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#include <asm/gpio.h>
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#include <asm/i8259.h>
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#include <asm/intel_regs.h>
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#include <asm/io.h>
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#include <asm/ioapic.h>
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#include <asm/lpc_common.h>
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#include <asm/pch_common.h>
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#include <asm/arch/cpu.h>
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#include <asm/arch/gpio.h>
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#include <asm/arch/iomap.h>
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#include <asm/arch/pch.h>
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#include <asm/arch/pm.h>
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#include <asm/arch/rcb.h>
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#include <asm/arch/spi.h>
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#define BIOS_CTRL 0xdc
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bool cpu_is_ult(void)
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{
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u32 fm = cpu_get_family_model();
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return fm == BROADWELL_FAMILY_ULT || fm == HASWELL_FAMILY_ULT;
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}
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static int broadwell_pch_early_init(struct udevice *dev)
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{
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struct gpio_desc desc;
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struct udevice *bus;
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pci_dev_t bdf;
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int ret;
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dm_pci_write_config32(dev, PCH_RCBA, RCB_BASE_ADDRESS | 1);
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dm_pci_write_config32(dev, PMBASE, ACPI_BASE_ADDRESS | 1);
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dm_pci_write_config8(dev, ACPI_CNTL, ACPI_EN);
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dm_pci_write_config32(dev, GPIO_BASE, GPIO_BASE_ADDRESS | 1);
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dm_pci_write_config8(dev, GPIO_CNTL, GPIO_EN);
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/* Enable IOAPIC */
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writew(0x1000, RCB_REG(OIC));
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/* Read back for posted write */
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readw(RCB_REG(OIC));
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/* Set HPET address and enable it */
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clrsetbits_le32(RCB_REG(HPTC), 3, 1 << 7);
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/* Read back for posted write */
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readl(RCB_REG(HPTC));
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/* Enable HPET to start counter */
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setbits_le32(HPET_BASE_ADDRESS + 0x10, 1 << 0);
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setbits_le32(RCB_REG(GCS), 1 << 5);
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/*
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* Enable PP3300_AUTOBAHN_EN after initial GPIO setup
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* to prevent possible brownout. This will cause the GPIOs to be set
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* up if it has not been done already.
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*/
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ret = gpio_request_by_name(dev, "power-enable-gpio", 0, &desc,
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GPIOD_IS_OUT | GPIOD_IS_OUT_ACTIVE);
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if (ret)
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return ret;
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/* 8.14 Additional PCI Express Programming Steps, step #1 */
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bdf = PCI_BDF(0, 0x1c, 0);
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bus = pci_get_controller(dev);
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pci_bus_clrset_config32(bus, bdf, 0xf4, 0x60, 0);
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pci_bus_clrset_config32(bus, bdf, 0xf4, 0x80, 0x80);
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pci_bus_clrset_config32(bus, bdf, 0xe2, 0x30, 0x30);
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return 0;
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}
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static void pch_misc_init(struct udevice *dev)
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{
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/* Setup SLP signal assertion, SLP_S4=4s, SLP_S3=50ms */
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dm_pci_clrset_config8(dev, GEN_PMCON_3, 3 << 4 | 1 << 10,
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1 << 3 | 1 << 11 | 1 << 12);
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/* Prepare sleep mode */
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clrsetio_32(ACPI_BASE_ADDRESS + PM1_CNT, SLP_TYP, SCI_EN);
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/* Setup NMI on errors, disable SERR */
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clrsetio_8(0x61, 0xf0, 1 << 2);
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/* Disable NMI sources */
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setio_8(0x70, 1 << 7);
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/* Indicate DRAM init done for MRC */
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dm_pci_clrset_config8(dev, GEN_PMCON_2, 0, 1 << 7);
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/* Clear status bits to prevent unexpected wake */
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setbits_le32(RCB_REG(0x3310), 0x0000002f);
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clrsetbits_le32(RCB_REG(0x3f02), 0x0000000f, 0);
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/* Enable PCIe Relaxed Order */
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setbits_le32(RCB_REG(0x2314), 1 << 31 | 1 << 7);
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setbits_le32(RCB_REG(0x1114), 1 << 15 | 1 << 14);
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/* Setup SERIRQ, enable continuous mode */
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dm_pci_clrset_config8(dev, SERIRQ_CNTL, 0, 1 << 7 | 1 << 6);
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};
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static void pch_enable_ioapic(void)
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{
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u32 reg32;
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io_apic_set_id(0x02);
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/* affirm full set of redirection table entries ("write once") */
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reg32 = io_apic_read(0x01);
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/* PCH-LP has 39 redirection entries */
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reg32 &= ~0x00ff0000;
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reg32 |= 0x00270000;
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io_apic_write(0x01, reg32);
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/*
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* Select Boot Configuration register (0x03) and
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* use Processor System Bus (0x01) to deliver interrupts.
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*/
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io_apic_write(0x03, 0x01);
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}
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/* Enable all requested GPE */
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void enable_all_gpe(u32 set1, u32 set2, u32 set3, u32 set4)
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{
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outl(set1, ACPI_BASE_ADDRESS + GPE0_EN(GPE_31_0));
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outl(set2, ACPI_BASE_ADDRESS + GPE0_EN(GPE_63_32));
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outl(set3, ACPI_BASE_ADDRESS + GPE0_EN(GPE_94_64));
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outl(set4, ACPI_BASE_ADDRESS + GPE0_EN(GPE_STD));
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}
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/*
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* Enable GPIO SMI events - it would be good to put this in the GPIO driver
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* but it would need a new driver operation.
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*/
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int enable_alt_smi(struct udevice *pch, u32 mask)
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{
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struct pch_lp_gpio_regs *regs;
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u32 gpiobase;
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int ret;
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ret = pch_get_gpio_base(pch, &gpiobase);
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if (ret) {
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debug("%s: invalid GPIOBASE address (%08x)\n", __func__,
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gpiobase);
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return -EINVAL;
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}
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regs = (struct pch_lp_gpio_regs *)gpiobase;
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setio_32(regs->alt_gpi_smi_en, mask);
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return 0;
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}
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static int pch_power_options(struct udevice *dev)
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{
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int pwr_on_after_power_fail = MAINBOARD_POWER_OFF;
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const char *state;
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u32 enable[4];
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u16 reg16;
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int ret;
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dm_pci_read_config16(dev, GEN_PMCON_3, ®16);
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reg16 &= 0xfffe;
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switch (pwr_on_after_power_fail) {
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case MAINBOARD_POWER_OFF:
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reg16 |= 1;
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state = "off";
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break;
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case MAINBOARD_POWER_ON:
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reg16 &= ~1;
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state = "on";
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break;
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case MAINBOARD_POWER_KEEP:
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reg16 &= ~1;
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state = "state keep";
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break;
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default:
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state = "undefined";
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}
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dm_pci_write_config16(dev, GEN_PMCON_3, reg16);
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debug("Set power %s after power failure.\n", state);
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/* GPE setup based on device tree configuration */
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ret = fdtdec_get_int_array(gd->fdt_blob, dev->of_offset,
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"intel,gpe0-en", enable, ARRAY_SIZE(enable));
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if (ret)
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return -EINVAL;
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enable_all_gpe(enable[0], enable[1], enable[2], enable[3]);
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/* SMI setup based on device tree configuration */
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enable_alt_smi(dev, fdtdec_get_int(gd->fdt_blob, dev->of_offset,
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"intel,alt-gp-smi-enable", 0));
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return 0;
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}
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/* Magic register settings for power management */
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static void pch_pm_init_magic(struct udevice *dev)
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{
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dm_pci_write_config8(dev, 0xa9, 0x46);
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clrbits_le32(RCB_REG(0x232c), 1),
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setbits_le32(RCB_REG(0x1100), 0x0000c13f);
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clrsetbits_le32(RCB_REG(0x2320), 0x60, 0x10);
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writel(0x00012fff, RCB_REG(0x3314));
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clrsetbits_le32(RCB_REG(0x3318), 0x000f0330, 0x0dcf0400);
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writel(0x04000000, RCB_REG(0x3324));
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writel(0x00041400, RCB_REG(0x3368));
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writel(0x3f8ddbff, RCB_REG(0x3388));
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writel(0x00007001, RCB_REG(0x33ac));
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writel(0x00181900, RCB_REG(0x33b0));
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writel(0x00060A00, RCB_REG(0x33c0));
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writel(0x06200840, RCB_REG(0x33d0));
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writel(0x01010101, RCB_REG(0x3a28));
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writel(0x040c0404, RCB_REG(0x3a2c));
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writel(0x9000000a, RCB_REG(0x3a9c));
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writel(0x03808033, RCB_REG(0x2b1c));
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writel(0x80000009, RCB_REG(0x2b34));
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writel(0x022ddfff, RCB_REG(0x3348));
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writel(0x00000001, RCB_REG(0x334c));
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writel(0x0001c000, RCB_REG(0x3358));
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writel(0x3f8ddbff, RCB_REG(0x3380));
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writel(0x0001c7e1, RCB_REG(0x3384));
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writel(0x0001c7e1, RCB_REG(0x338c));
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writel(0x0001c000, RCB_REG(0x3398));
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writel(0x00181900, RCB_REG(0x33a8));
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writel(0x00080000, RCB_REG(0x33dc));
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writel(0x00000001, RCB_REG(0x33e0));
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writel(0x0000040c, RCB_REG(0x3a20));
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writel(0x01010101, RCB_REG(0x3a24));
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writel(0x01010101, RCB_REG(0x3a30));
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dm_pci_clrset_config32(dev, 0xac, 0x00200000, 0);
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setbits_le32(RCB_REG(0x0410), 0x00000003);
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setbits_le32(RCB_REG(0x2618), 0x08000000);
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setbits_le32(RCB_REG(0x2300), 0x00000002);
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setbits_le32(RCB_REG(0x2600), 0x00000008);
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writel(0x00007001, RCB_REG(0x33b4));
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writel(0x022ddfff, RCB_REG(0x3350));
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writel(0x00000001, RCB_REG(0x3354));
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/* Power Optimizer */
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setbits_le32(RCB_REG(0x33d4), 0x08000000);
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/*
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* This stops the LCD from turning on:
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* setbits_le32(RCB_REG(0x33c8), 0x08000080);
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*/
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writel(0x0000883c, RCB_REG(0x2b10));
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writel(0x1e0a4616, RCB_REG(0x2b14));
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writel(0x40000005, RCB_REG(0x2b24));
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writel(0x0005db01, RCB_REG(0x2b20));
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writel(0x05145005, RCB_REG(0x3a80));
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writel(0x00001005, RCB_REG(0x3a84));
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setbits_le32(RCB_REG(0x33d4), 0x2fff2fb1);
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setbits_le32(RCB_REG(0x33c8), 0x00008000);
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};
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static int pch_type(struct udevice *dev)
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{
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u16 type;
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dm_pci_read_config16(dev, PCI_DEVICE_ID, &type);
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return type;
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}
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/* Return 1 if PCH type is WildcatPoint */
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static int pch_is_wpt(struct udevice *dev)
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{
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return ((pch_type(dev) & 0xfff0) == 0x9cc0) ? 1 : 0;
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}
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/* Return 1 if PCH type is WildcatPoint ULX */
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static int pch_is_wpt_ulx(struct udevice *dev)
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{
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u16 lpcid = pch_type(dev);
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switch (lpcid) {
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case PCH_WPT_BDW_Y_SAMPLE:
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case PCH_WPT_BDW_Y_PREMIUM:
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case PCH_WPT_BDW_Y_BASE:
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return 1;
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}
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return 0;
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}
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static u32 pch_read_soft_strap(int id)
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{
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clrbits_le32(SPI_REG(SPIBAR_FDOC), 0x00007ffc);
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setbits_le32(SPI_REG(SPIBAR_FDOC), 0x00004000 | id * 4);
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return readl(SPI_REG(SPIBAR_FDOD));
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}
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static void pch_enable_mphy(struct udevice *dev)
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{
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u32 data_and = 0xffffffff;
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u32 data_or = (1 << 14) | (1 << 13) | (1 << 12);
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data_or |= (1 << 0);
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if (pch_is_wpt(dev)) {
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data_and &= ~((1 << 7) | (1 << 6) | (1 << 3));
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data_or |= (1 << 5) | (1 << 4);
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if (pch_is_wpt_ulx(dev)) {
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/* Check if SATA and USB3 MPHY are enabled */
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u32 strap19 = pch_read_soft_strap(19);
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strap19 &= ((1 << 31) | (1 << 30));
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strap19 >>= 30;
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if (strap19 == 3) {
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data_or |= (1 << 3);
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debug("Enable ULX MPHY PG control in single domain\n");
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} else if (strap19 == 0) {
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debug("Enable ULX MPHY PG control in split domains\n");
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} else {
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debug("Invalid PCH Soft Strap 19 configuration\n");
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}
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} else {
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data_or |= (1 << 3);
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}
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}
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pch_iobp_update(0xCF000000, data_and, data_or);
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}
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static void pch_init_deep_sx(bool deep_sx_enable_ac, bool deep_sx_enable_dc)
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{
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if (deep_sx_enable_ac) {
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setbits_le32(RCB_REG(DEEP_S3_POL), DEEP_S3_EN_AC);
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setbits_le32(RCB_REG(DEEP_S5_POL), DEEP_S5_EN_AC);
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}
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if (deep_sx_enable_dc) {
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setbits_le32(RCB_REG(DEEP_S3_POL), DEEP_S3_EN_DC);
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setbits_le32(RCB_REG(DEEP_S5_POL), DEEP_S5_EN_DC);
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}
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if (deep_sx_enable_ac || deep_sx_enable_dc) {
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setbits_le32(RCB_REG(DEEP_SX_CONFIG),
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DEEP_SX_WAKE_PIN_EN | DEEP_SX_GP27_PIN_EN);
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}
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}
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/* Power Management init */
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static void pch_pm_init(struct udevice *dev)
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{
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debug("PCH PM init\n");
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pch_init_deep_sx(false, false);
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pch_enable_mphy(dev);
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pch_pm_init_magic(dev);
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if (pch_is_wpt(dev)) {
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setbits_le32(RCB_REG(0x33e0), 1 << 4 | 1 << 1);
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setbits_le32(RCB_REG(0x2b1c), 1 << 22 | 1 << 14 | 1 << 13);
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writel(0x16bf0002, RCB_REG(0x33e4));
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setbits_le32(RCB_REG(0x33e4), 0x1);
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}
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pch_iobp_update(0xCA000000, ~0UL, 0x00000009);
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/* Set RCBA 0x2b1c[29]=1 if DSP disabled */
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if (readl(RCB_REG(FD)) & PCH_DISABLE_ADSPD)
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setbits_le32(RCB_REG(0x2b1c), 1 << 29);
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}
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static void pch_cg_init(struct udevice *dev)
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{
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struct udevice *bus = pci_get_controller(dev);
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u32 reg32;
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u16 reg16;
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ulong val;
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/* DMI */
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setbits_le32(RCB_REG(0x2234), 0xf);
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dm_pci_read_config16(dev, GEN_PMCON_1, ®16);
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reg16 &= ~(1 << 10); /* Disable BIOS_PCI_EXP_EN for native PME */
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if (pch_is_wpt(dev))
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reg16 &= ~(1 << 11);
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else
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reg16 |= 1 << 11;
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reg16 |= 1 << 5 | 1 << 6 | 1 << 7 | 1 << 12;
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reg16 |= 1 << 2; /* PCI CLKRUN# Enable */
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dm_pci_write_config16(dev, GEN_PMCON_1, reg16);
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/*
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* RCBA + 0x2614[27:25,14:13,10,8] = 101,11,1,1
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* RCBA + 0x2614[23:16] = 0x20
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* RCBA + 0x2614[30:28] = 0x0
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* RCBA + 0x2614[26] = 1 (IF 0:2.0@0x08 >= 0x0b)
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*/
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clrsetbits_le32(RCB_REG(0x2614), 0x64ff0000, 0x0a206500);
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/* Check for 0:2.0@0x08 >= 0x0b */
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pci_bus_read_config(bus, PCI_BDF(0, 0x2, 0), 0x8, &val, PCI_SIZE_8);
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if (pch_is_wpt(dev) || val >= 0x0b)
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setbits_le32(RCB_REG(0x2614), 1 << 26);
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setbits_le32(RCB_REG(0x900), 0x0000031f);
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reg32 = readl(RCB_REG(CG));
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if (readl(RCB_REG(0x3454)) & (1 << 4))
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reg32 &= ~(1 << 29); /* LPC Dynamic */
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else
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reg32 |= (1 << 29); /* LPC Dynamic */
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reg32 |= 1 << 31; /* LP LPC */
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reg32 |= 1 << 30; /* LP BLA */
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if (readl(RCB_REG(0x3454)) & (1 << 4))
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reg32 &= ~(1 << 29);
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else
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reg32 |= 1 << 29;
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reg32 |= 1 << 28; /* GPIO Dynamic */
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reg32 |= 1 << 27; /* HPET Dynamic */
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reg32 |= 1 << 26; /* Generic Platform Event Clock */
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if (readl(RCB_REG(BUC)) & PCH_DISABLE_GBE)
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reg32 |= 1 << 23; /* GbE Static */
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if (readl(RCB_REG(FD)) & PCH_DISABLE_HD_AUDIO)
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reg32 |= 1 << 21; /* HDA Static */
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reg32 |= 1 << 22; /* HDA Dynamic */
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writel(reg32, RCB_REG(CG));
|
|
|
|
/* PCH-LP LPC */
|
|
if (pch_is_wpt(dev))
|
|
clrsetbits_le32(RCB_REG(0x3434), 0x1f, 0x17);
|
|
else
|
|
setbits_le32(RCB_REG(0x3434), 0x7);
|
|
|
|
/* SPI */
|
|
setbits_le32(RCB_REG(0x38c0), 0x3c07);
|
|
|
|
pch_iobp_update(0xCE00C000, ~1UL, 0x00000000);
|
|
}
|
|
|
|
static void systemagent_init(void)
|
|
{
|
|
/* Enable Power Aware Interrupt Routing */
|
|
clrsetbits_8(MCHBAR_REG(MCH_PAIR), 0x7, 0x4); /* Fixed Priority */
|
|
|
|
/*
|
|
* Set bits 0+1 of BIOS_RESET_CPL to indicate to the CPU
|
|
* that BIOS has initialized memory and power management
|
|
*/
|
|
setbits_8(MCHBAR_REG(BIOS_RESET_CPL), 3);
|
|
debug("Set BIOS_RESET_CPL\n");
|
|
|
|
/* Configure turbo power limits 1ms after reset complete bit */
|
|
mdelay(1);
|
|
|
|
cpu_set_power_limits(28);
|
|
}
|
|
|
|
static int broadwell_pch_init(struct udevice *dev)
|
|
{
|
|
int ret;
|
|
|
|
/* Enable upper 128 bytes of CMOS */
|
|
setbits_le32(RCB_REG(RC), 1 << 2);
|
|
|
|
/*
|
|
* TODO: TCO timer halt - this hangs
|
|
* setio_16(ACPI_BASE_ADDRESS + TCO1_CNT, TCO_TMR_HLT);
|
|
*/
|
|
|
|
/* Disable unused device (always) */
|
|
setbits_le32(RCB_REG(FD), PCH_DISABLE_ALWAYS);
|
|
|
|
pch_misc_init(dev);
|
|
|
|
/* Interrupt configuration */
|
|
pch_enable_ioapic();
|
|
|
|
/* Initialize power management */
|
|
ret = pch_power_options(dev);
|
|
if (ret)
|
|
return ret;
|
|
pch_pm_init(dev);
|
|
pch_cg_init(dev);
|
|
systemagent_init();
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int broadwell_pch_probe(struct udevice *dev)
|
|
{
|
|
if (!(gd->flags & GD_FLG_RELOC))
|
|
return broadwell_pch_early_init(dev);
|
|
else
|
|
return broadwell_pch_init(dev);
|
|
}
|
|
|
|
static int broadwell_pch_get_spi_base(struct udevice *dev, ulong *sbasep)
|
|
{
|
|
u32 rcba;
|
|
|
|
dm_pci_read_config32(dev, PCH_RCBA, &rcba);
|
|
/* Bits 31-14 are the base address, 13-1 are reserved, 0 is enable */
|
|
rcba = rcba & 0xffffc000;
|
|
*sbasep = rcba + 0x3800;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int broadwell_set_spi_protect(struct udevice *dev, bool protect)
|
|
{
|
|
return lpc_set_spi_protect(dev, BIOS_CTRL, protect);
|
|
}
|
|
|
|
static int broadwell_get_gpio_base(struct udevice *dev, u32 *gbasep)
|
|
{
|
|
dm_pci_read_config32(dev, GPIO_BASE, gbasep);
|
|
*gbasep &= PCI_BASE_ADDRESS_IO_MASK;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct pch_ops broadwell_pch_ops = {
|
|
.get_spi_base = broadwell_pch_get_spi_base,
|
|
.set_spi_protect = broadwell_set_spi_protect,
|
|
.get_gpio_base = broadwell_get_gpio_base,
|
|
};
|
|
|
|
static const struct udevice_id broadwell_pch_ids[] = {
|
|
{ .compatible = "intel,broadwell-pch" },
|
|
{ }
|
|
};
|
|
|
|
U_BOOT_DRIVER(broadwell_pch) = {
|
|
.name = "broadwell_pch",
|
|
.id = UCLASS_PCH,
|
|
.of_match = broadwell_pch_ids,
|
|
.probe = broadwell_pch_probe,
|
|
.ops = &broadwell_pch_ops,
|
|
};
|
|
|