diff options
Diffstat (limited to 'src/soc/amd/stoneyridge/early_fch.c')
| -rw-r--r-- | src/soc/amd/stoneyridge/early_fch.c | 173 |
1 files changed, 173 insertions, 0 deletions
diff --git a/src/soc/amd/stoneyridge/early_fch.c b/src/soc/amd/stoneyridge/early_fch.c new file mode 100644 index 0000000000..1f038f61f1 --- /dev/null +++ b/src/soc/amd/stoneyridge/early_fch.c @@ -0,0 +1,173 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ + +#include <amdblocks/acpimmio.h> +#include <amdblocks/lpc.h> +#include <amdblocks/pmlib.h> +#include <amdblocks/reset.h> +#include <amdblocks/smbus.h> +#include <amdblocks/spi.h> +#include <soc/southbridge.h> +#include <types.h> + +static void sb_enable_lpc(void) +{ + u8 byte; + + /* Enable LPC controller */ + byte = pm_io_read8(PM_LPC_GATING); + byte |= PM_LPC_ENABLE; + pm_io_write8(PM_LPC_GATING, byte); +} + +static void sb_lpc_decode(void) +{ + u32 tmp = 0; + + /* Enable I/O decode to LPC bus */ + tmp = DECODE_ENABLE_PARALLEL_PORT0 | DECODE_ENABLE_PARALLEL_PORT2 + | DECODE_ENABLE_PARALLEL_PORT4 | DECODE_ENABLE_SERIAL_PORT0 + | DECODE_ENABLE_SERIAL_PORT1 | DECODE_ENABLE_SERIAL_PORT2 + | DECODE_ENABLE_SERIAL_PORT3 | DECODE_ENABLE_SERIAL_PORT4 + | DECODE_ENABLE_SERIAL_PORT5 | DECODE_ENABLE_SERIAL_PORT6 + | DECODE_ENABLE_SERIAL_PORT7 | DECODE_ENABLE_AUDIO_PORT0 + | DECODE_ENABLE_AUDIO_PORT1 | DECODE_ENABLE_AUDIO_PORT2 + | DECODE_ENABLE_AUDIO_PORT3 | DECODE_ENABLE_MSS_PORT2 + | DECODE_ENABLE_MSS_PORT3 | DECODE_ENABLE_FDC_PORT0 + | DECODE_ENABLE_FDC_PORT1 | DECODE_ENABLE_GAME_PORT + | DECODE_ENABLE_KBC_PORT | DECODE_ENABLE_ACPIUC_PORT + | DECODE_ENABLE_ADLIB_PORT; + + /* Decode SIOs at 2E/2F and 4E/4F */ + if (CONFIG(STONEYRIDGE_LEGACY_FREE)) + tmp |= DECODE_ALTERNATE_SIO_ENABLE | DECODE_SIO_ENABLE; + + lpc_enable_decode(tmp); +} + +static void setup_spread_spectrum(int *reboot) +{ + uint16_t rstcfg = pm_read16(PWR_RESET_CFG); + + rstcfg &= ~TOGGLE_ALL_PWR_GOOD; + pm_write16(PWR_RESET_CFG, rstcfg); + + uint32_t cntl1 = misc_read32(MISC_CLK_CNTL1); + + if (cntl1 & CG1PLL_FBDIV_TEST) { + printk(BIOS_DEBUG, "Spread spectrum is ready\n"); + misc_write32(MISC_CGPLL_CONFIG1, + misc_read32(MISC_CGPLL_CONFIG1) | + CG1PLL_SPREAD_SPECTRUM_ENABLE); + + return; + } + + printk(BIOS_DEBUG, "Setting up spread spectrum\n"); + + uint32_t cfg6 = misc_read32(MISC_CGPLL_CONFIG6); + cfg6 &= ~CG1PLL_LF_MODE_MASK; + cfg6 |= (0x0f8 << CG1PLL_LF_MODE_SHIFT) & CG1PLL_LF_MODE_MASK; + misc_write32(MISC_CGPLL_CONFIG6, cfg6); + + uint32_t cfg3 = misc_read32(MISC_CGPLL_CONFIG3); + cfg3 &= ~CG1PLL_REFDIV_MASK; + cfg3 |= (0x003 << CG1PLL_REFDIV_SHIFT) & CG1PLL_REFDIV_MASK; + cfg3 &= ~CG1PLL_FBDIV_MASK; + cfg3 |= (0x04b << CG1PLL_FBDIV_SHIFT) & CG1PLL_FBDIV_MASK; + misc_write32(MISC_CGPLL_CONFIG3, cfg3); + + uint32_t cfg5 = misc_read32(MISC_CGPLL_CONFIG5); + cfg5 &= ~SS_AMOUNT_NFRAC_SLIP_MASK; + cfg5 |= (0x2 << SS_AMOUNT_NFRAC_SLIP_SHIFT) & SS_AMOUNT_NFRAC_SLIP_MASK; + misc_write32(MISC_CGPLL_CONFIG5, cfg5); + + uint32_t cfg4 = misc_read32(MISC_CGPLL_CONFIG4); + cfg4 &= ~SS_AMOUNT_DSFRAC_MASK; + cfg4 |= (0xd000 << SS_AMOUNT_DSFRAC_SHIFT) & SS_AMOUNT_DSFRAC_MASK; + cfg4 &= ~SS_STEP_SIZE_DSFRAC_MASK; + cfg4 |= (0x02d5 << SS_STEP_SIZE_DSFRAC_SHIFT) + & SS_STEP_SIZE_DSFRAC_MASK; + misc_write32(MISC_CGPLL_CONFIG4, cfg4); + + rstcfg |= TOGGLE_ALL_PWR_GOOD; + pm_write16(PWR_RESET_CFG, rstcfg); + + cntl1 |= CG1PLL_FBDIV_TEST; + misc_write32(MISC_CLK_CNTL1, cntl1); + + *reboot = 1; +} + +static void setup_misc(int *reboot) +{ + /* Undocumented register */ + uint32_t reg = misc_read32(0x50); + if (!(reg & BIT(16))) { + reg |= BIT(16); + + misc_write32(0x50, reg); + *reboot = 1; + } +} + +/* Before console init */ +void bootblock_fch_early_init(void) +{ + int reboot = 0; + + /* Enable_acpimmio_decode_pm04 to enable the ACPIMMIO decode which is needed to access + the GPIO registers. */ + enable_acpimmio_decode_pm04(); + lpc_enable_rom(); + sb_enable_lpc(); + lpc_enable_port80(); + sb_lpc_decode(); + /* Make sure the base address is predictable */ + lpc_set_spibase(SPI_BASE_ADDRESS); + fch_spi_early_init(); + fch_smbus_init(); + fch_enable_cf9_io(); + setup_spread_spectrum(&reboot); + setup_misc(&reboot); + + if (reboot) + warm_reset(); + + fch_enable_legacy_io(); + enable_aoac_devices(); + + /* disable the keyboard reset function before mainboard GPIO setup */ + if (CONFIG(DISABLE_KEYBOARD_RESET_PIN)) + fch_disable_kb_rst(); +} + +/* After console init */ +void bootblock_fch_init(void) +{ + pm_set_power_failure_state(); + fch_print_pmxc0_status(); + show_spi_speeds_and_modes(); +} + +void fch_clk_output_48Mhz(u32 osc) +{ + u32 ctrl; + + /* + * Clear the disable for OSCOUT1 (signal typically named XnnM_25M_48M) + * or OSCOUT2 (USBCLK/25M_48M_OSC). The frequency defaults to 48MHz. + */ + ctrl = misc_read32(MISC_CLK_CNTL1); + + switch (osc) { + case 1: + ctrl &= ~OSCOUT1_CLK_OUTPUT_ENB; + break; + case 2: + ctrl &= ~OSCOUT2_CLK_OUTPUT_ENB; + break; + default: + return; /* do nothing if invalid */ + } + misc_write32(MISC_CLK_CNTL1, ctrl); +} |