2 * Copyright (c) 2014 Google, Inc
4 * Graeme Russ, graeme.russ@gmail.com.
6 * Some portions from coreboot src/mainboard/google/link/romstage.c
7 * and src/cpu/intel/model_206ax/bootblock.c
8 * Copyright (C) 2007-2010 coresystems GmbH
9 * Copyright (C) 2011 Google Inc.
11 * SPDX-License-Identifier: GPL-2.0
20 #include <asm/lapic.h>
25 #include <asm/processor.h>
26 #include <asm/arch/model_206ax.h>
27 #include <asm/arch/microcode.h>
28 #include <asm/arch/pch.h>
29 #include <asm/arch/sandybridge.h>
31 DECLARE_GLOBAL_DATA_PTR;
33 static void enable_port80_on_lpc(struct pci_controller *hose, pci_dev_t dev)
35 /* Enable port 80 POST on LPC */
36 pci_hose_write_config_dword(hose, dev, PCH_RCBA_BASE, DEFAULT_RCBA | 1);
37 clrbits_le32(RCB_REG(GCS), 4);
41 * Enable Prefetching and Caching.
43 static void enable_spi_prefetch(struct pci_controller *hose, pci_dev_t dev)
47 pci_hose_read_config_byte(hose, dev, 0xdc, ®8);
49 reg8 |= (2 << 2); /* Prefetching and Caching Enabled */
50 pci_hose_write_config_byte(hose, dev, 0xdc, reg8);
53 static int set_flex_ratio_to_tdp_nominal(void)
55 msr_t flex_ratio, msr;
58 /* Minimum CPU revision for configurable TDP support */
59 if (cpuid_eax(1) < IVB_CONFIG_TDP_MIN_CPUID)
62 /* Check for Flex Ratio support */
63 flex_ratio = msr_read(MSR_FLEX_RATIO);
64 if (!(flex_ratio.lo & FLEX_RATIO_EN))
67 /* Check for >0 configurable TDPs */
68 msr = msr_read(MSR_PLATFORM_INFO);
69 if (((msr.hi >> 1) & 3) == 0)
72 /* Use nominal TDP ratio for flex ratio */
73 msr = msr_read(MSR_CONFIG_TDP_NOMINAL);
74 nominal_ratio = msr.lo & 0xff;
76 /* See if flex ratio is already set to nominal TDP ratio */
77 if (((flex_ratio.lo >> 8) & 0xff) == nominal_ratio)
80 /* Set flex ratio to nominal TDP ratio */
81 flex_ratio.lo &= ~0xff00;
82 flex_ratio.lo |= nominal_ratio << 8;
83 flex_ratio.lo |= FLEX_RATIO_LOCK;
84 msr_write(MSR_FLEX_RATIO, flex_ratio);
86 /* Set flex ratio in soft reset data register bits 11:6 */
87 clrsetbits_le32(RCB_REG(SOFT_RESET_DATA), 0x3f << 6,
88 (nominal_ratio & 0x3f) << 6);
90 /* Set soft reset control to use register value */
91 setbits_le32(RCB_REG(SOFT_RESET_CTRL), 1);
93 /* Issue warm reset, will be "CPU only" due to soft reset data */
94 outb(0x0, PORT_RESET);
95 outb(SYS_RST | RST_CPU, PORT_RESET);
102 static void set_spi_speed(void)
106 /* Observe SPI Descriptor Component Section 0 */
107 writel(0x1000, RCB_REG(SPI_DESC_COMP0));
109 /* Extract the1 Write/Erase SPI Frequency from descriptor */
110 fdod = readl(RCB_REG(SPI_FREQ_WR_ERA));
114 /* Set Software Sequence frequency to match */
115 clrsetbits_8(RCB_REG(SPI_FREQ_SWSEQ), 7, fdod);
118 int arch_cpu_init(void)
120 post_code(POST_CPU_INIT);
122 return x86_cpu_init_f();
125 int arch_cpu_init_dm(void)
127 struct pci_controller *hose;
128 struct udevice *bus, *dev;
132 ret = uclass_get_device(UCLASS_PCI, 0, &bus);
137 hose = dev_get_uclass_priv(bus);
139 /* TODO(sjg@chromium.org): Get rid of gd->hose */
142 ret = uclass_first_device(UCLASS_LPC, &dev);
146 enable_spi_prefetch(hose, PCH_LPC_DEV);
148 /* This is already done in start.S, but let's do it in C */
149 enable_port80_on_lpc(hose, PCH_LPC_DEV);
154 * We should do as little as possible before the serial console is
155 * up. Perhaps this should move to later. Our next lot of init
156 * happens in print_cpuinfo() when we have a console
158 ret = set_flex_ratio_to_tdp_nominal();
165 static int enable_smbus(void)
170 /* Set the SMBus device statically. */
171 dev = PCI_BDF(0x0, 0x1f, 0x3);
173 /* Check to make sure we've got the right device. */
174 value = x86_pci_read_config16(dev, 0x0);
175 if (value != 0x8086) {
176 printf("SMBus controller not found\n");
180 /* Set SMBus I/O base. */
181 x86_pci_write_config32(dev, SMB_BASE,
182 SMBUS_IO_BASE | PCI_BASE_ADDRESS_SPACE_IO);
184 /* Set SMBus enable. */
185 x86_pci_write_config8(dev, HOSTC, HST_EN);
187 /* Set SMBus I/O space enable. */
188 x86_pci_write_config16(dev, PCI_COMMAND, PCI_COMMAND_IO);
190 /* Disable interrupt generation. */
191 outb(0, SMBUS_IO_BASE + SMBHSTCTL);
193 /* Clear any lingering errors, so transactions can run. */
194 outb(inb(SMBUS_IO_BASE + SMBHSTSTAT), SMBUS_IO_BASE + SMBHSTSTAT);
195 debug("SMBus controller enabled\n");
200 #define PCH_EHCI0_TEMP_BAR0 0xe8000000
201 #define PCH_EHCI1_TEMP_BAR0 0xe8000400
202 #define PCH_XHCI_TEMP_BAR0 0xe8001000
205 * Setup USB controller MMIO BAR to prevent the reference code from
206 * resetting the controller.
208 * The BAR will be re-assigned during device enumeration so these are only
211 * This is used to speed up the resume path.
213 static void enable_usb_bar(void)
215 pci_dev_t usb0 = PCH_EHCI1_DEV;
216 pci_dev_t usb1 = PCH_EHCI2_DEV;
217 pci_dev_t usb3 = PCH_XHCI_DEV;
220 /* USB Controller 1 */
221 x86_pci_write_config32(usb0, PCI_BASE_ADDRESS_0,
222 PCH_EHCI0_TEMP_BAR0);
223 cmd = x86_pci_read_config32(usb0, PCI_COMMAND);
224 cmd |= PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY;
225 x86_pci_write_config32(usb0, PCI_COMMAND, cmd);
227 /* USB Controller 1 */
228 x86_pci_write_config32(usb1, PCI_BASE_ADDRESS_0,
229 PCH_EHCI1_TEMP_BAR0);
230 cmd = x86_pci_read_config32(usb1, PCI_COMMAND);
231 cmd |= PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY;
232 x86_pci_write_config32(usb1, PCI_COMMAND, cmd);
234 /* USB3 Controller */
235 x86_pci_write_config32(usb3, PCI_BASE_ADDRESS_0,
237 cmd = x86_pci_read_config32(usb3, PCI_COMMAND);
238 cmd |= PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY;
239 x86_pci_write_config32(usb3, PCI_COMMAND, cmd);
242 static int report_bist_failure(void)
244 if (gd->arch.bist != 0) {
245 post_code(POST_BIST_FAILURE);
246 printf("BIST failed: %08x\n", gd->arch.bist);
253 int print_cpuinfo(void)
255 enum pei_boot_mode_t boot_mode = PEI_BOOT_NONE;
256 char processor_name[CPU_MAX_NAME_LEN];
262 /* Halt if there was a built in self test failure */
263 ret = report_bist_failure();
269 ret = microcode_update_intel();
273 /* Enable upper 128bytes of CMOS */
274 writel(1 << 2, RCB_REG(RC));
276 /* TODO: cmos_post_init() */
277 if (readl(MCHBAR_REG(SSKPD)) == 0xCAFE) {
278 debug("soft reset detected\n");
279 boot_mode = PEI_BOOT_SOFT_RESET;
281 /* System is not happy after keyboard reset... */
282 debug("Issuing CF9 warm reset\n");
286 /* Early chipset init required before RAM init can work */
287 sandybridge_early_init(SANDYBRIDGE_MOBILE);
289 /* Check PM1_STS[15] to see if we are waking from Sx */
290 pm1_sts = inw(DEFAULT_PMBASE + PM1_STS);
292 /* Read PM1_CNT[12:10] to determine which Sx state */
293 pm1_cnt = inl(DEFAULT_PMBASE + PM1_CNT);
295 if ((pm1_sts & WAK_STS) && ((pm1_cnt >> 10) & 7) == 5) {
296 debug("Resume from S3 detected, but disabled.\n");
299 * TODO: An indication of life might be possible here (e.g.
303 post_code(POST_EARLY_INIT);
305 /* Enable SPD ROMs and DDR-III DRAM */
306 ret = enable_smbus();
310 /* Prepare USB controller early in S3 resume */
311 if (boot_mode == PEI_BOOT_RESUME)
314 gd->arch.pei_boot_mode = boot_mode;
316 /* TODO: Move this to the board or driver */
317 x86_pci_write_config32(PCH_LPC_DEV, GPIO_BASE, DEFAULT_GPIOBASE | 1);
318 x86_pci_write_config32(PCH_LPC_DEV, GPIO_CNTL, 0x10);
320 /* Print processor name */
321 name = cpu_get_name(processor_name);
322 printf("CPU: %s\n", name);
324 post_code(POST_CPU_INFO);
329 void board_debug_uart_init(void)
331 /* This enables the debug UART */
332 pci_x86_write_config(NULL, PCH_LPC_DEV, LPC_EN, COMA_LPC_EN,