+// SPDX-License-Identifier: GPL-2.0
/*
* From coreboot southbridge/intel/bd82x6x/lpc.c
*
* Copyright (C) 2008-2009 coresystems GmbH
- *
- * SPDX-License-Identifier: GPL-2.0
*/
#include <common.h>
+#include <dm.h>
#include <errno.h>
#include <fdtdec.h>
+#include <log.h>
+#include <rtc.h>
#include <pci.h>
+#include <asm/intel_regs.h>
+#include <asm/interrupt.h>
+#include <asm/io.h>
+#include <asm/ioapic.h>
+#include <asm/lpc_common.h>
#include <asm/pci.h>
#include <asm/arch/pch.h>
-int lpc_early_init(const void *blob, int node, pci_dev_t dev)
+DECLARE_GLOBAL_DATA_PTR;
+
+#define NMI_OFF 0
+
+#define ENABLE_ACPI_MODE_IN_COREBOOT 0
+#define TEST_SMM_FLASH_LOCKDOWN 0
+
+static int pch_enable_apic(struct udevice *pch)
{
- struct reg_info {
- u32 base;
- u32 size;
- } values[4], *ptr;
- int count;
+ u32 reg32;
int i;
- count = fdtdec_get_int_array_count(blob, node, "gen-dec",
- (u32 *)values, sizeof(values) / sizeof(u32));
- if (count < 0)
+ /* Enable ACPI I/O and power management. Set SCI IRQ to IRQ9 */
+ dm_pci_write_config8(pch, ACPI_CNTL, 0x80);
+
+ writel(0, IO_APIC_INDEX);
+ writel(1 << 25, IO_APIC_DATA);
+
+ /* affirm full set of redirection table entries ("write once") */
+ writel(1, IO_APIC_INDEX);
+ reg32 = readl(IO_APIC_DATA);
+ writel(1, IO_APIC_INDEX);
+ writel(reg32, IO_APIC_DATA);
+
+ writel(0, IO_APIC_INDEX);
+ reg32 = readl(IO_APIC_DATA);
+ debug("PCH APIC ID = %x\n", (reg32 >> 24) & 0x0f);
+ if (reg32 != (1 << 25)) {
+ printf("APIC Error - cannot write to registers\n");
+ return -EPERM;
+ }
+
+ debug("Dumping IOAPIC registers\n");
+ for (i = 0; i < 3; i++) {
+ writel(i, IO_APIC_INDEX);
+ debug(" reg 0x%04x:", i);
+ reg32 = readl(IO_APIC_DATA);
+ debug(" 0x%08x\n", reg32);
+ }
+
+ /* Select Boot Configuration register. */
+ writel(3, IO_APIC_INDEX);
+
+ /* Use Processor System Bus to deliver interrupts. */
+ writel(1, IO_APIC_DATA);
+
+ return 0;
+}
+
+static void pch_enable_serial_irqs(struct udevice *pch)
+{
+ u32 value;
+
+ /* Set packet length and toggle silent mode bit for one frame. */
+ value = (1 << 7) | (1 << 6) | ((21 - 17) << 2) | (0 << 0);
+#ifdef CONFIG_SERIRQ_CONTINUOUS_MODE
+ dm_pci_write_config8(pch, SERIRQ_CNTL, value);
+#else
+ dm_pci_write_config8(pch, SERIRQ_CNTL, value | (1 << 6));
+#endif
+}
+
+static int pch_pirq_init(struct udevice *pch)
+{
+ uint8_t route[8], *ptr;
+
+ if (fdtdec_get_byte_array(gd->fdt_blob, dev_of_offset(pch),
+ "intel,pirq-routing", route, sizeof(route)))
return -EINVAL;
+ ptr = route;
+ dm_pci_write_config8(pch, PIRQA_ROUT, *ptr++);
+ dm_pci_write_config8(pch, PIRQB_ROUT, *ptr++);
+ dm_pci_write_config8(pch, PIRQC_ROUT, *ptr++);
+ dm_pci_write_config8(pch, PIRQD_ROUT, *ptr++);
+
+ dm_pci_write_config8(pch, PIRQE_ROUT, *ptr++);
+ dm_pci_write_config8(pch, PIRQF_ROUT, *ptr++);
+ dm_pci_write_config8(pch, PIRQG_ROUT, *ptr++);
+ dm_pci_write_config8(pch, PIRQH_ROUT, *ptr++);
+
+ /*
+ * TODO(sjg@chromium.org): U-Boot does not set up the interrupts
+ * here. It's unclear if it is needed
+ */
+ return 0;
+}
+
+static int pch_gpi_routing(struct udevice *pch)
+{
+ u8 route[16];
+ u32 reg;
+ int gpi;
+
+ if (fdtdec_get_byte_array(gd->fdt_blob, dev_of_offset(pch),
+ "intel,gpi-routing", route, sizeof(route)))
+ return -EINVAL;
+
+ for (reg = 0, gpi = 0; gpi < ARRAY_SIZE(route); gpi++)
+ reg |= route[gpi] << (gpi * 2);
+
+ dm_pci_write_config32(pch, 0xb8, reg);
+
+ return 0;
+}
+
+static int pch_power_options(struct udevice *pch)
+{
+ const void *blob = gd->fdt_blob;
+ int node = dev_of_offset(pch);
+ u8 reg8;
+ u16 reg16, pmbase;
+ u32 reg32;
+ const char *state;
+ int pwr_on;
+ int nmi_option;
+ int ret;
+
+ /*
+ * Which state do we want to goto after g3 (power restored)?
+ * 0 == S0 Full On
+ * 1 == S5 Soft Off
+ *
+ * If the option is not existent (Laptops), use Kconfig setting.
+ * TODO(sjg@chromium.org): Make this configurable
+ */
+ pwr_on = MAINBOARD_POWER_ON;
+
+ dm_pci_read_config16(pch, GEN_PMCON_3, ®16);
+ reg16 &= 0xfffe;
+ switch (pwr_on) {
+ case MAINBOARD_POWER_OFF:
+ reg16 |= 1;
+ state = "off";
+ break;
+ case MAINBOARD_POWER_ON:
+ reg16 &= ~1;
+ state = "on";
+ break;
+ case MAINBOARD_POWER_KEEP:
+ reg16 &= ~1;
+ state = "state keep";
+ break;
+ default:
+ state = "undefined";
+ }
+
+ reg16 &= ~(3 << 4); /* SLP_S4# Assertion Stretch 4s */
+ reg16 |= (1 << 3); /* SLP_S4# Assertion Stretch Enable */
+
+ reg16 &= ~(1 << 10);
+ reg16 |= (1 << 11); /* SLP_S3# Min Assertion Width 50ms */
+
+ reg16 |= (1 << 12); /* Disable SLP stretch after SUS well */
+
+ dm_pci_write_config16(pch, GEN_PMCON_3, reg16);
+ debug("Set power %s after power failure.\n", state);
+
+ /* Set up NMI on errors. */
+ reg8 = inb(0x61);
+ reg8 &= 0x0f; /* Higher Nibble must be 0 */
+ reg8 &= ~(1 << 3); /* IOCHK# NMI Enable */
+ reg8 |= (1 << 2); /* PCI SERR# Disable for now */
+ outb(reg8, 0x61);
+
+ reg8 = inb(0x70);
+ /* TODO(sjg@chromium.org): Make this configurable */
+ nmi_option = NMI_OFF;
+ if (nmi_option) {
+ debug("NMI sources enabled.\n");
+ reg8 &= ~(1 << 7); /* Set NMI. */
+ } else {
+ debug("NMI sources disabled.\n");
+ /* Can't mask NMI from PCI-E and NMI_NOW */
+ reg8 |= (1 << 7);
+ }
+ outb(reg8, 0x70);
+
+ /* Enable CPU_SLP# and Intel Speedstep, set SMI# rate down */
+ dm_pci_read_config16(pch, GEN_PMCON_1, ®16);
+ reg16 &= ~(3 << 0); /* SMI# rate 1 minute */
+ reg16 &= ~(1 << 10); /* Disable BIOS_PCI_EXP_EN for native PME */
+#if DEBUG_PERIODIC_SMIS
+ /* Set DEBUG_PERIODIC_SMIS in pch.h to debug using periodic SMIs */
+ reg16 |= (3 << 0); /* Periodic SMI every 8s */
+#endif
+ dm_pci_write_config16(pch, GEN_PMCON_1, reg16);
+
+ /* Set the board's GPI routing. */
+ ret = pch_gpi_routing(pch);
+ if (ret)
+ return ret;
+
+ dm_pci_read_config16(pch, 0x40, &pmbase);
+ pmbase &= 0xfffe;
+
+ writel(fdtdec_get_int(blob, node, "intel,gpe0-enable", 0),
+ (ulong)pmbase + GPE0_EN);
+ writew(fdtdec_get_int(blob, node, "intel,alt-gp-smi-enable", 0),
+ (ulong)pmbase + ALT_GP_SMI_EN);
+
+ /* Set up power management block and determine sleep mode */
+ reg32 = inl(pmbase + 0x04); /* PM1_CNT */
+ reg32 &= ~(7 << 10); /* SLP_TYP */
+ reg32 |= (1 << 0); /* SCI_EN */
+ outl(reg32, pmbase + 0x04);
+
+ /* Clear magic status bits to prevent unexpected wake */
+ setbits_le32(RCB_REG(0x3310), (1 << 4) | (1 << 5) | (1 << 0));
+ clrbits_le32(RCB_REG(0x3f02), 0xf);
+
+ return 0;
+}
+
+static void pch_rtc_init(struct udevice *pch)
+{
+ int rtc_failed;
+ u8 reg8;
+
+ dm_pci_read_config8(pch, GEN_PMCON_3, ®8);
+ rtc_failed = reg8 & RTC_BATTERY_DEAD;
+ if (rtc_failed) {
+ reg8 &= ~RTC_BATTERY_DEAD;
+ dm_pci_write_config8(pch, GEN_PMCON_3, reg8);
+ }
+ debug("rtc_failed = 0x%x\n", rtc_failed);
+
+ /* TODO: Handle power failure */
+ if (rtc_failed)
+ printf("RTC power failed\n");
+}
- /* Set COM1/COM2 decode range */
- pci_write_config16(dev, LPC_IO_DEC, 0x0010);
+/* CougarPoint PCH Power Management init */
+static void cpt_pm_init(struct udevice *pch)
+{
+ debug("CougarPoint PM init\n");
+ dm_pci_write_config8(pch, 0xa9, 0x47);
+ setbits_le32(RCB_REG(0x2238), (1 << 6) | (1 << 0));
+
+ setbits_le32(RCB_REG(0x228c), 1 << 0);
+ setbits_le32(RCB_REG(0x1100), (1 << 13) | (1 << 14));
+ setbits_le32(RCB_REG(0x0900), 1 << 14);
+ writel(0xc0388400, RCB_REG(0x2304));
+ setbits_le32(RCB_REG(0x2314), (1 << 5) | (1 << 18));
+ setbits_le32(RCB_REG(0x2320), (1 << 15) | (1 << 1));
+ clrsetbits_le32(RCB_REG(0x3314), ~0x1f, 0xf);
+ writel(0x050f0000, RCB_REG(0x3318));
+ writel(0x04000000, RCB_REG(0x3324));
+ setbits_le32(RCB_REG(0x3340), 0xfffff);
+ setbits_le32(RCB_REG(0x3344), 1 << 1);
+
+ writel(0x0001c000, RCB_REG(0x3360));
+ writel(0x00061100, RCB_REG(0x3368));
+ writel(0x7f8fdfff, RCB_REG(0x3378));
+ writel(0x000003fc, RCB_REG(0x337c));
+ writel(0x00001000, RCB_REG(0x3388));
+ writel(0x0001c000, RCB_REG(0x3390));
+ writel(0x00000800, RCB_REG(0x33a0));
+ writel(0x00001000, RCB_REG(0x33b0));
+ writel(0x00093900, RCB_REG(0x33c0));
+ writel(0x24653002, RCB_REG(0x33cc));
+ writel(0x062108fe, RCB_REG(0x33d0));
+ clrsetbits_le32(RCB_REG(0x33d4), 0x0fff0fff, 0x00670060);
+ writel(0x01010000, RCB_REG(0x3a28));
+ writel(0x01010404, RCB_REG(0x3a2c));
+ writel(0x01041041, RCB_REG(0x3a80));
+ clrsetbits_le32(RCB_REG(0x3a84), 0x0000ffff, 0x00001001);
+ setbits_le32(RCB_REG(0x3a84), 1 << 24); /* SATA 2/3 disabled */
+ setbits_le32(RCB_REG(0x3a88), 1 << 0); /* SATA 4/5 disabled */
+ writel(0x00000001, RCB_REG(0x3a6c));
+ clrsetbits_le32(RCB_REG(0x2344), ~0x00ffff00, 0xff00000c);
+ clrsetbits_le32(RCB_REG(0x80c), 0xff << 20, 0x11 << 20);
+ writel(0, RCB_REG(0x33c8));
+ setbits_le32(RCB_REG(0x21b0), 0xf);
+}
+
+/* PantherPoint PCH Power Management init */
+static void ppt_pm_init(struct udevice *pch)
+{
+ debug("PantherPoint PM init\n");
+ dm_pci_write_config8(pch, 0xa9, 0x47);
+ setbits_le32(RCB_REG(0x2238), 1 << 0);
+ setbits_le32(RCB_REG(0x228c), 1 << 0);
+ setbits_le16(RCB_REG(0x1100), (1 << 13) | (1 << 14));
+ setbits_le16(RCB_REG(0x0900), 1 << 14);
+ writel(0xc03b8400, RCB_REG(0x2304));
+ setbits_le32(RCB_REG(0x2314), (1 << 5) | (1 << 18));
+ setbits_le32(RCB_REG(0x2320), (1 << 15) | (1 << 1));
+ clrsetbits_le32(RCB_REG(0x3314), 0x1f, 0xf);
+ writel(0x054f0000, RCB_REG(0x3318));
+ writel(0x04000000, RCB_REG(0x3324));
+ setbits_le32(RCB_REG(0x3340), 0xfffff);
+ setbits_le32(RCB_REG(0x3344), (1 << 1) | (1 << 0));
+ writel(0x0001c000, RCB_REG(0x3360));
+ writel(0x00061100, RCB_REG(0x3368));
+ writel(0x7f8fdfff, RCB_REG(0x3378));
+ writel(0x000003fd, RCB_REG(0x337c));
+ writel(0x00001000, RCB_REG(0x3388));
+ writel(0x0001c000, RCB_REG(0x3390));
+ writel(0x00000800, RCB_REG(0x33a0));
+ writel(0x00001000, RCB_REG(0x33b0));
+ writel(0x00093900, RCB_REG(0x33c0));
+ writel(0x24653002, RCB_REG(0x33cc));
+ writel(0x067388fe, RCB_REG(0x33d0));
+ clrsetbits_le32(RCB_REG(0x33d4), 0x0fff0fff, 0x00670060);
+ writel(0x01010000, RCB_REG(0x3a28));
+ writel(0x01010404, RCB_REG(0x3a2c));
+ writel(0x01040000, RCB_REG(0x3a80));
+ clrsetbits_le32(RCB_REG(0x3a84), 0x0000ffff, 0x00001001);
+ /* SATA 2/3 disabled */
+ setbits_le32(RCB_REG(0x3a84), 1 << 24);
+ /* SATA 4/5 disabled */
+ setbits_le32(RCB_REG(0x3a88), 1 << 0);
+ writel(0x00000001, RCB_REG(0x3a6c));
+ clrsetbits_le32(RCB_REG(0x2344), 0xff0000ff, 0xff00000c);
+ clrsetbits_le32(RCB_REG(0x80c), 0xff << 20, 0x11 << 20);
+ setbits_le32(RCB_REG(0x33a4), (1 << 0));
+ writel(0, RCB_REG(0x33c8));
+ setbits_le32(RCB_REG(0x21b0), 0xf);
+}
+
+static void enable_hpet(void)
+{
+ /* Move HPET to default address 0xfed00000 and enable it */
+ clrsetbits_le32(RCB_REG(HPTC), 3 << 0, 1 << 7);
+}
+
+static void enable_clock_gating(struct udevice *pch)
+{
+ u32 reg32;
+ u16 reg16;
+
+ setbits_le32(RCB_REG(0x2234), 0xf);
+
+ dm_pci_read_config16(pch, GEN_PMCON_1, ®16);
+ reg16 |= (1 << 2) | (1 << 11);
+ dm_pci_write_config16(pch, GEN_PMCON_1, reg16);
+
+ pch_iobp_update(pch, 0xeb007f07, ~0U, 1 << 31);
+ pch_iobp_update(pch, 0xeb004000, ~0U, 1 << 7);
+ pch_iobp_update(pch, 0xec007f07, ~0U, 1 << 31);
+ pch_iobp_update(pch, 0xec004000, ~0U, 1 << 7);
+
+ reg32 = readl(RCB_REG(CG));
+ reg32 |= (1 << 31);
+ reg32 |= (1 << 29) | (1 << 28);
+ reg32 |= (1 << 27) | (1 << 26) | (1 << 25) | (1 << 24);
+ reg32 |= (1 << 16);
+ reg32 |= (1 << 17);
+ reg32 |= (1 << 18);
+ reg32 |= (1 << 22);
+ reg32 |= (1 << 23);
+ reg32 &= ~(1 << 20);
+ reg32 |= (1 << 19);
+ reg32 |= (1 << 0);
+ reg32 |= (0xf << 1);
+ writel(reg32, RCB_REG(CG));
+
+ setbits_le32(RCB_REG(0x38c0), 0x7);
+ setbits_le32(RCB_REG(0x36d4), 0x6680c004);
+ setbits_le32(RCB_REG(0x3564), 0x3);
+}
+
+static void pch_disable_smm_only_flashing(struct udevice *pch)
+{
+ u8 reg8;
+
+ debug("Enabling BIOS updates outside of SMM... ");
+ dm_pci_read_config8(pch, 0xdc, ®8); /* BIOS_CNTL */
+ reg8 &= ~(1 << 5);
+ dm_pci_write_config8(pch, 0xdc, reg8);
+}
+
+static void pch_fixups(struct udevice *pch)
+{
+ u8 gen_pmcon_2;
+
+ /* Indicate DRAM init done for MRC S3 to know it can resume */
+ dm_pci_read_config8(pch, GEN_PMCON_2, &gen_pmcon_2);
+ gen_pmcon_2 |= (1 << 7);
+ dm_pci_write_config8(pch, GEN_PMCON_2, gen_pmcon_2);
+
+ /* Enable DMI ASPM in the PCH */
+ clrbits_le32(RCB_REG(0x2304), 1 << 10);
+ setbits_le32(RCB_REG(0x21a4), (1 << 11) | (1 << 10));
+ setbits_le32(RCB_REG(0x21a8), 0x3);
+}
+
+static void set_spi_speed(void)
+{
+ u32 fdod;
+
+ /* Observe SPI Descriptor Component Section 0 */
+ writel(0x1000, RCB_REG(SPI_DESC_COMP0));
+
+ /* Extract the1 Write/Erase SPI Frequency from descriptor */
+ fdod = readl(RCB_REG(SPI_FREQ_WR_ERA));
+ fdod >>= 24;
+ fdod &= 7;
- /* Enable PS/2 Keyboard/Mouse, EC areas and COM1 */
- pci_write_config16(dev, LPC_EN, KBC_LPC_EN | MC_LPC_EN |
- GAMEL_LPC_EN | COMA_LPC_EN);
+ /* Set Software Sequence frequency to match */
+ clrsetbits_8(RCB_REG(SPI_FREQ_SWSEQ), 7, fdod);
+}
+
+static int lpc_init_extra(struct udevice *dev)
+{
+ struct udevice *pch = dev->parent;
+
+ debug("pch: lpc_init\n");
+ dm_pci_write_bar32(pch, 0, 0);
+ dm_pci_write_bar32(pch, 1, 0xff800000);
+ dm_pci_write_bar32(pch, 2, 0xfec00000);
+ dm_pci_write_bar32(pch, 3, 0x800);
+ dm_pci_write_bar32(pch, 4, 0x900);
+
+ /* Set the value for PCI command register. */
+ dm_pci_write_config16(pch, PCI_COMMAND, 0x000f);
+
+ /* IO APIC initialization. */
+ pch_enable_apic(pch);
+
+ pch_enable_serial_irqs(pch);
+
+ /* Setup the PIRQ. */
+ pch_pirq_init(pch);
- /* Write all registers but use 0 if we run out of data */
- count = count * sizeof(u32) / sizeof(values[0]);
- for (i = 0, ptr = values; i < ARRAY_SIZE(values); i++, ptr++) {
- u32 reg = 0;
+ /* Setup power options. */
+ pch_power_options(pch);
- if (i < count)
- reg = ptr->base | PCI_COMMAND_IO | (ptr->size << 16);
- pci_write_config32(dev, LPC_GENX_DEC(i), reg);
+ /* Initialize power management */
+ switch (pch_silicon_type(pch)) {
+ case PCH_TYPE_CPT: /* CougarPoint */
+ cpt_pm_init(pch);
+ break;
+ case PCH_TYPE_PPT: /* PantherPoint */
+ ppt_pm_init(pch);
+ break;
+ default:
+ printf("Unknown Chipset: %s\n", pch->name);
+ return -ENOSYS;
}
+ /* Initialize the real time clock. */
+ pch_rtc_init(pch);
+
+ /* Initialize the High Precision Event Timers, if present. */
+ enable_hpet();
+
+ /* Initialize Clock Gating */
+ enable_clock_gating(pch);
+
+ pch_disable_smm_only_flashing(pch);
+
+ pch_fixups(pch);
+
return 0;
}
+
+static int bd82x6x_lpc_early_init(struct udevice *dev)
+{
+ set_spi_speed();
+
+ /* Setting up Southbridge. In the northbridge code. */
+ debug("Setting up static southbridge registers\n");
+ dm_pci_write_config32(dev->parent, PCH_RCBA_BASE,
+ RCB_BASE_ADDRESS | 1);
+ dm_pci_write_config32(dev->parent, PMBASE, DEFAULT_PMBASE | 1);
+
+ /* Enable ACPI BAR */
+ dm_pci_write_config8(dev->parent, ACPI_CNTL, 0x80);
+
+ debug("Disabling watchdog reboot\n");
+ setbits_le32(RCB_REG(GCS), 1 >> 5); /* No reset */
+ outw(1 << 11, DEFAULT_PMBASE | 0x60 | 0x08); /* halt timer */
+
+ dm_pci_write_config32(dev->parent, GPIO_BASE, DEFAULT_GPIOBASE | 1);
+ dm_pci_write_config32(dev->parent, GPIO_CNTL, 0x10);
+
+ return 0;
+}
+
+static int bd82x6x_lpc_probe(struct udevice *dev)
+{
+ int ret;
+
+ if (!(gd->flags & GD_FLG_RELOC)) {
+ ret = lpc_common_early_init(dev);
+ if (ret) {
+ debug("%s: lpc_early_init() failed\n", __func__);
+ return ret;
+ }
+
+ return bd82x6x_lpc_early_init(dev);
+ }
+
+ return lpc_init_extra(dev);
+}
+
+static const struct udevice_id bd82x6x_lpc_ids[] = {
+ { .compatible = "intel,bd82x6x-lpc" },
+ { }
+};
+
+U_BOOT_DRIVER(bd82x6x_lpc_drv) = {
+ .name = "lpc",
+ .id = UCLASS_LPC,
+ .of_match = bd82x6x_lpc_ids,
+ .probe = bd82x6x_lpc_probe,
+};
projects / oweals / u-boot.git / blobdiff