diff options
Diffstat (limited to 'arch/x86/cpu/broadwell/pch.c')
| -rw-r--r-- | arch/x86/cpu/broadwell/pch.c | 110 |
1 files changed, 110 insertions, 0 deletions
diff --git a/arch/x86/cpu/broadwell/pch.c b/arch/x86/cpu/broadwell/pch.c index 82506ba35e..73d3d3b515 100644 --- a/arch/x86/cpu/broadwell/pch.c +++ b/arch/x86/cpu/broadwell/pch.c @@ -20,7 +20,9 @@ #include <asm/arch/pch.h> #include <asm/arch/pm.h> #include <asm/arch/rcb.h> +#include <asm/arch/serialio.h> #include <asm/arch/spi.h> +#include <dm/uclass-internal.h> #define BIOS_CTRL 0xdc @@ -456,6 +458,111 @@ static void systemagent_init(void) cpu_set_power_limits(28); } +/* Enable LTR Auto Mode for D21:F1-F6 */ +static void serialio_d21_ltr(u32 bar0) +{ + /* 1. Program BAR0 + 808h[2] = 0b */ + clrbits_le32(bar0 + SIO_REG_PPR_GEN, SIO_REG_PPR_GEN_LTR_MODE_MASK); + + /* 2. Program BAR0 + 804h[1:0] = 00b */ + clrbits_le32(bar0 + SIO_REG_PPR_RST, SIO_REG_PPR_RST_ASSERT); + + /* 3. Program BAR0 + 804h[1:0] = 11b */ + setbits_le32(bar0 + SIO_REG_PPR_RST, SIO_REG_PPR_RST_ASSERT); + + /* 4. Program BAR0 + 814h[31:0] = 00000000h */ + writel(0, bar0 + SIO_REG_AUTO_LTR); +} + +/* Select I2C voltage of 1.8V or 3.3V */ +static void serialio_i2c_voltage_sel(u32 bar0, uint voltage) +{ + clrsetbits_le32(bar0 + SIO_REG_PPR_GEN, SIO_REG_PPR_GEN_VOLTAGE_MASK, + SIO_REG_PPR_GEN_VOLTAGE(voltage)); +} + +/* Put Serial IO D21:F0-F6 device into desired mode */ +static void serialio_d21_mode(int sio_index, int int_pin, bool acpi_mode) +{ + u32 portctrl = SIO_IOBP_PORTCTRL_PM_CAP_PRSNT; + + /* Snoop select 1 */ + portctrl |= SIO_IOBP_PORTCTRL_SNOOP_SELECT(1); + + /* Set interrupt pin */ + portctrl |= SIO_IOBP_PORTCTRL_INT_PIN(int_pin); + + if (acpi_mode) { + /* Enable ACPI interrupt mode */ + portctrl |= SIO_IOBP_PORTCTRL_ACPI_IRQ_EN; + } + + pch_iobp_update(SIO_IOBP_PORTCTRLX(sio_index), 0, portctrl); +} + +/* Init sequence to be run once, done as part of D21:F0 (SDMA) init */ +static void serialio_init_once(bool acpi_mode) +{ + if (acpi_mode) { + /* Enable ACPI IRQ for IRQ13, IRQ7, IRQ6, IRQ5 in RCBA */ + setbits_le32(RCB_REG(ACPIIRQEN), + 1 << 13 | 1 << 7 | 1 << 6 | 1 << 5); + } + + /* Program IOBP CB000154h[12,9:8,4:0] = 1001100011111b */ + pch_iobp_update(SIO_IOBP_GPIODF, ~0x0000131f, 0x0000131f); + + /* Program IOBP CB000180h[5:0] = 111111b (undefined register) */ + pch_iobp_update(0xcb000180, ~0x0000003f, 0x0000003f); +} + +/** + * pch_serialio_init() - set up serial I/O devices + * + * @return 0 if OK, -ve on error + */ +static int pch_serialio_init(void) +{ + struct udevice *dev, *hda; + bool acpi_mode = true; + u32 bar0, bar1; + int ret; + + ret = uclass_find_first_device(UCLASS_I2C, &dev); + if (ret) + return ret; + bar0 = dm_pci_read_bar32(dev, 0); + if (!bar0) + return -EINVAL; + bar1 = dm_pci_read_bar32(dev, 1); + if (!bar1) + return -EINVAL; + + serialio_init_once(acpi_mode); + serialio_d21_mode(SIO_ID_SDMA, SIO_PIN_INTB, acpi_mode); + + serialio_d21_ltr(bar0); + serialio_i2c_voltage_sel(bar0, 1); /* Select 1.8V always */ + serialio_d21_mode(SIO_ID_I2C0, SIO_PIN_INTC, acpi_mode); + setbits_le32(bar1 + PCH_PCS, PCH_PCS_PS_D3HOT); + + clrbits_le32(bar1 + PCH_PCS, PCH_PCS_PS_D3HOT); + + setbits_le32(bar0 + SIO_REG_PPR_CLOCK, SIO_REG_PPR_CLOCK_EN); + + /* Manually find the High-definition audio, to turn it off */ + ret = dm_pci_bus_find_bdf(PCI_BDF(0, 0x1b, 0), &hda); + if (ret) + return -ENOENT; + dm_pci_clrset_config8(hda, 0x43, 0, 0x6f); + + /* Route I/O buffers to ADSP function */ + dm_pci_clrset_config8(hda, 0x42, 0, 1 << 7 | 1 << 6); + log_debug("HDA disabled, I/O buffers routed to ADSP\n"); + + return 0; +} + static int broadwell_pch_init(struct udevice *dev) { int ret; @@ -482,6 +589,9 @@ static int broadwell_pch_init(struct udevice *dev) return ret; pch_pm_init(dev); pch_cg_init(dev); + ret = pch_serialio_init(); + if (ret) + return ret; systemagent_init(); return 0; |