Merge tag 'u-boot-atmel-fixes-2020.07-a' of https://gitlab.denx.de/u-boot/custodians...
[oweals/u-boot.git] / arch / x86 / cpu / ivybridge / lpc.c
1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  * From coreboot southbridge/intel/bd82x6x/lpc.c
4  *
5  * Copyright (C) 2008-2009 coresystems GmbH
6  */
7
8 #include <common.h>
9 #include <dm.h>
10 #include <errno.h>
11 #include <fdtdec.h>
12 #include <log.h>
13 #include <rtc.h>
14 #include <pci.h>
15 #include <asm/intel_regs.h>
16 #include <asm/interrupt.h>
17 #include <asm/io.h>
18 #include <asm/ioapic.h>
19 #include <asm/lpc_common.h>
20 #include <asm/pci.h>
21 #include <asm/arch/pch.h>
22
23 DECLARE_GLOBAL_DATA_PTR;
24
25 #define NMI_OFF                         0
26
27 #define ENABLE_ACPI_MODE_IN_COREBOOT    0
28 #define TEST_SMM_FLASH_LOCKDOWN         0
29
30 static int pch_enable_apic(struct udevice *pch)
31 {
32         u32 reg32;
33         int i;
34
35         /* Enable ACPI I/O and power management. Set SCI IRQ to IRQ9 */
36         dm_pci_write_config8(pch, ACPI_CNTL, 0x80);
37
38         writel(0, IO_APIC_INDEX);
39         writel(1 << 25, IO_APIC_DATA);
40
41         /* affirm full set of redirection table entries ("write once") */
42         writel(1, IO_APIC_INDEX);
43         reg32 = readl(IO_APIC_DATA);
44         writel(1, IO_APIC_INDEX);
45         writel(reg32, IO_APIC_DATA);
46
47         writel(0, IO_APIC_INDEX);
48         reg32 = readl(IO_APIC_DATA);
49         debug("PCH APIC ID = %x\n", (reg32 >> 24) & 0x0f);
50         if (reg32 != (1 << 25)) {
51                 printf("APIC Error - cannot write to registers\n");
52                 return -EPERM;
53         }
54
55         debug("Dumping IOAPIC registers\n");
56         for (i = 0;  i < 3; i++) {
57                 writel(i, IO_APIC_INDEX);
58                 debug("  reg 0x%04x:", i);
59                 reg32 = readl(IO_APIC_DATA);
60                 debug(" 0x%08x\n", reg32);
61         }
62
63         /* Select Boot Configuration register. */
64         writel(3, IO_APIC_INDEX);
65
66         /* Use Processor System Bus to deliver interrupts. */
67         writel(1, IO_APIC_DATA);
68
69         return 0;
70 }
71
72 static void pch_enable_serial_irqs(struct udevice *pch)
73 {
74         u32 value;
75
76         /* Set packet length and toggle silent mode bit for one frame. */
77         value = (1 << 7) | (1 << 6) | ((21 - 17) << 2) | (0 << 0);
78 #ifdef CONFIG_SERIRQ_CONTINUOUS_MODE
79         dm_pci_write_config8(pch, SERIRQ_CNTL, value);
80 #else
81         dm_pci_write_config8(pch, SERIRQ_CNTL, value | (1 << 6));
82 #endif
83 }
84
85 static int pch_pirq_init(struct udevice *pch)
86 {
87         uint8_t route[8], *ptr;
88
89         if (fdtdec_get_byte_array(gd->fdt_blob, dev_of_offset(pch),
90                                   "intel,pirq-routing", route, sizeof(route)))
91                 return -EINVAL;
92         ptr = route;
93         dm_pci_write_config8(pch, PIRQA_ROUT, *ptr++);
94         dm_pci_write_config8(pch, PIRQB_ROUT, *ptr++);
95         dm_pci_write_config8(pch, PIRQC_ROUT, *ptr++);
96         dm_pci_write_config8(pch, PIRQD_ROUT, *ptr++);
97
98         dm_pci_write_config8(pch, PIRQE_ROUT, *ptr++);
99         dm_pci_write_config8(pch, PIRQF_ROUT, *ptr++);
100         dm_pci_write_config8(pch, PIRQG_ROUT, *ptr++);
101         dm_pci_write_config8(pch, PIRQH_ROUT, *ptr++);
102
103         /*
104          * TODO(sjg@chromium.org): U-Boot does not set up the interrupts
105          * here. It's unclear if it is needed
106          */
107         return 0;
108 }
109
110 static int pch_gpi_routing(struct udevice *pch)
111 {
112         u8 route[16];
113         u32 reg;
114         int gpi;
115
116         if (fdtdec_get_byte_array(gd->fdt_blob, dev_of_offset(pch),
117                                   "intel,gpi-routing", route, sizeof(route)))
118                 return -EINVAL;
119
120         for (reg = 0, gpi = 0; gpi < ARRAY_SIZE(route); gpi++)
121                 reg |= route[gpi] << (gpi * 2);
122
123         dm_pci_write_config32(pch, 0xb8, reg);
124
125         return 0;
126 }
127
128 static int pch_power_options(struct udevice *pch)
129 {
130         const void *blob = gd->fdt_blob;
131         int node = dev_of_offset(pch);
132         u8 reg8;
133         u16 reg16, pmbase;
134         u32 reg32;
135         const char *state;
136         int pwr_on;
137         int nmi_option;
138         int ret;
139
140         /*
141          * Which state do we want to goto after g3 (power restored)?
142          * 0 == S0 Full On
143          * 1 == S5 Soft Off
144          *
145          * If the option is not existent (Laptops), use Kconfig setting.
146          * TODO(sjg@chromium.org): Make this configurable
147          */
148         pwr_on = MAINBOARD_POWER_ON;
149
150         dm_pci_read_config16(pch, GEN_PMCON_3, &reg16);
151         reg16 &= 0xfffe;
152         switch (pwr_on) {
153         case MAINBOARD_POWER_OFF:
154                 reg16 |= 1;
155                 state = "off";
156                 break;
157         case MAINBOARD_POWER_ON:
158                 reg16 &= ~1;
159                 state = "on";
160                 break;
161         case MAINBOARD_POWER_KEEP:
162                 reg16 &= ~1;
163                 state = "state keep";
164                 break;
165         default:
166                 state = "undefined";
167         }
168
169         reg16 &= ~(3 << 4);     /* SLP_S4# Assertion Stretch 4s */
170         reg16 |= (1 << 3);      /* SLP_S4# Assertion Stretch Enable */
171
172         reg16 &= ~(1 << 10);
173         reg16 |= (1 << 11);     /* SLP_S3# Min Assertion Width 50ms */
174
175         reg16 |= (1 << 12);     /* Disable SLP stretch after SUS well */
176
177         dm_pci_write_config16(pch, GEN_PMCON_3, reg16);
178         debug("Set power %s after power failure.\n", state);
179
180         /* Set up NMI on errors. */
181         reg8 = inb(0x61);
182         reg8 &= 0x0f;           /* Higher Nibble must be 0 */
183         reg8 &= ~(1 << 3);      /* IOCHK# NMI Enable */
184         reg8 |= (1 << 2); /* PCI SERR# Disable for now */
185         outb(reg8, 0x61);
186
187         reg8 = inb(0x70);
188         /* TODO(sjg@chromium.org): Make this configurable */
189         nmi_option = NMI_OFF;
190         if (nmi_option) {
191                 debug("NMI sources enabled.\n");
192                 reg8 &= ~(1 << 7);      /* Set NMI. */
193         } else {
194                 debug("NMI sources disabled.\n");
195                 /* Can't mask NMI from PCI-E and NMI_NOW */
196                 reg8 |= (1 << 7);
197         }
198         outb(reg8, 0x70);
199
200         /* Enable CPU_SLP# and Intel Speedstep, set SMI# rate down */
201         dm_pci_read_config16(pch, GEN_PMCON_1, &reg16);
202         reg16 &= ~(3 << 0);     /* SMI# rate 1 minute */
203         reg16 &= ~(1 << 10);    /* Disable BIOS_PCI_EXP_EN for native PME */
204 #if DEBUG_PERIODIC_SMIS
205         /* Set DEBUG_PERIODIC_SMIS in pch.h to debug using periodic SMIs */
206         reg16 |= (3 << 0);      /* Periodic SMI every 8s */
207 #endif
208         dm_pci_write_config16(pch, GEN_PMCON_1, reg16);
209
210         /* Set the board's GPI routing. */
211         ret = pch_gpi_routing(pch);
212         if (ret)
213                 return ret;
214
215         dm_pci_read_config16(pch, 0x40, &pmbase);
216         pmbase &= 0xfffe;
217
218         writel(fdtdec_get_int(blob, node, "intel,gpe0-enable", 0),
219                (ulong)pmbase + GPE0_EN);
220         writew(fdtdec_get_int(blob, node, "intel,alt-gp-smi-enable", 0),
221                (ulong)pmbase + ALT_GP_SMI_EN);
222
223         /* Set up power management block and determine sleep mode */
224         reg32 = inl(pmbase + 0x04); /* PM1_CNT */
225         reg32 &= ~(7 << 10);    /* SLP_TYP */
226         reg32 |= (1 << 0);      /* SCI_EN */
227         outl(reg32, pmbase + 0x04);
228
229         /* Clear magic status bits to prevent unexpected wake */
230         setbits_le32(RCB_REG(0x3310), (1 << 4) | (1 << 5) | (1 << 0));
231         clrbits_le32(RCB_REG(0x3f02), 0xf);
232
233         return 0;
234 }
235
236 static void pch_rtc_init(struct udevice *pch)
237 {
238         int rtc_failed;
239         u8 reg8;
240
241         dm_pci_read_config8(pch, GEN_PMCON_3, &reg8);
242         rtc_failed = reg8 & RTC_BATTERY_DEAD;
243         if (rtc_failed) {
244                 reg8 &= ~RTC_BATTERY_DEAD;
245                 dm_pci_write_config8(pch, GEN_PMCON_3, reg8);
246         }
247         debug("rtc_failed = 0x%x\n", rtc_failed);
248
249         /* TODO: Handle power failure */
250         if (rtc_failed)
251                 printf("RTC power failed\n");
252 }
253
254 /* CougarPoint PCH Power Management init */
255 static void cpt_pm_init(struct udevice *pch)
256 {
257         debug("CougarPoint PM init\n");
258         dm_pci_write_config8(pch, 0xa9, 0x47);
259         setbits_le32(RCB_REG(0x2238), (1 << 6) | (1 << 0));
260
261         setbits_le32(RCB_REG(0x228c), 1 << 0);
262         setbits_le32(RCB_REG(0x1100), (1 << 13) | (1 << 14));
263         setbits_le32(RCB_REG(0x0900), 1 << 14);
264         writel(0xc0388400, RCB_REG(0x2304));
265         setbits_le32(RCB_REG(0x2314), (1 << 5) | (1 << 18));
266         setbits_le32(RCB_REG(0x2320), (1 << 15) | (1 << 1));
267         clrsetbits_le32(RCB_REG(0x3314), ~0x1f, 0xf);
268         writel(0x050f0000, RCB_REG(0x3318));
269         writel(0x04000000, RCB_REG(0x3324));
270         setbits_le32(RCB_REG(0x3340), 0xfffff);
271         setbits_le32(RCB_REG(0x3344), 1 << 1);
272
273         writel(0x0001c000, RCB_REG(0x3360));
274         writel(0x00061100, RCB_REG(0x3368));
275         writel(0x7f8fdfff, RCB_REG(0x3378));
276         writel(0x000003fc, RCB_REG(0x337c));
277         writel(0x00001000, RCB_REG(0x3388));
278         writel(0x0001c000, RCB_REG(0x3390));
279         writel(0x00000800, RCB_REG(0x33a0));
280         writel(0x00001000, RCB_REG(0x33b0));
281         writel(0x00093900, RCB_REG(0x33c0));
282         writel(0x24653002, RCB_REG(0x33cc));
283         writel(0x062108fe, RCB_REG(0x33d0));
284         clrsetbits_le32(RCB_REG(0x33d4), 0x0fff0fff, 0x00670060);
285         writel(0x01010000, RCB_REG(0x3a28));
286         writel(0x01010404, RCB_REG(0x3a2c));
287         writel(0x01041041, RCB_REG(0x3a80));
288         clrsetbits_le32(RCB_REG(0x3a84), 0x0000ffff, 0x00001001);
289         setbits_le32(RCB_REG(0x3a84), 1 << 24); /* SATA 2/3 disabled */
290         setbits_le32(RCB_REG(0x3a88), 1 << 0);  /* SATA 4/5 disabled */
291         writel(0x00000001, RCB_REG(0x3a6c));
292         clrsetbits_le32(RCB_REG(0x2344), ~0x00ffff00, 0xff00000c);
293         clrsetbits_le32(RCB_REG(0x80c), 0xff << 20, 0x11 << 20);
294         writel(0, RCB_REG(0x33c8));
295         setbits_le32(RCB_REG(0x21b0), 0xf);
296 }
297
298 /* PantherPoint PCH Power Management init */
299 static void ppt_pm_init(struct udevice *pch)
300 {
301         debug("PantherPoint PM init\n");
302         dm_pci_write_config8(pch, 0xa9, 0x47);
303         setbits_le32(RCB_REG(0x2238), 1 << 0);
304         setbits_le32(RCB_REG(0x228c), 1 << 0);
305         setbits_le16(RCB_REG(0x1100), (1 << 13) | (1 << 14));
306         setbits_le16(RCB_REG(0x0900), 1 << 14);
307         writel(0xc03b8400, RCB_REG(0x2304));
308         setbits_le32(RCB_REG(0x2314), (1 << 5) | (1 << 18));
309         setbits_le32(RCB_REG(0x2320), (1 << 15) | (1 << 1));
310         clrsetbits_le32(RCB_REG(0x3314), 0x1f, 0xf);
311         writel(0x054f0000, RCB_REG(0x3318));
312         writel(0x04000000, RCB_REG(0x3324));
313         setbits_le32(RCB_REG(0x3340), 0xfffff);
314         setbits_le32(RCB_REG(0x3344), (1 << 1) | (1 << 0));
315         writel(0x0001c000, RCB_REG(0x3360));
316         writel(0x00061100, RCB_REG(0x3368));
317         writel(0x7f8fdfff, RCB_REG(0x3378));
318         writel(0x000003fd, RCB_REG(0x337c));
319         writel(0x00001000, RCB_REG(0x3388));
320         writel(0x0001c000, RCB_REG(0x3390));
321         writel(0x00000800, RCB_REG(0x33a0));
322         writel(0x00001000, RCB_REG(0x33b0));
323         writel(0x00093900, RCB_REG(0x33c0));
324         writel(0x24653002, RCB_REG(0x33cc));
325         writel(0x067388fe, RCB_REG(0x33d0));
326         clrsetbits_le32(RCB_REG(0x33d4), 0x0fff0fff, 0x00670060);
327         writel(0x01010000, RCB_REG(0x3a28));
328         writel(0x01010404, RCB_REG(0x3a2c));
329         writel(0x01040000, RCB_REG(0x3a80));
330         clrsetbits_le32(RCB_REG(0x3a84), 0x0000ffff, 0x00001001);
331         /* SATA 2/3 disabled */
332         setbits_le32(RCB_REG(0x3a84), 1 << 24);
333         /* SATA 4/5 disabled */
334         setbits_le32(RCB_REG(0x3a88), 1 << 0);
335         writel(0x00000001, RCB_REG(0x3a6c));
336         clrsetbits_le32(RCB_REG(0x2344), 0xff0000ff, 0xff00000c);
337         clrsetbits_le32(RCB_REG(0x80c), 0xff << 20, 0x11 << 20);
338         setbits_le32(RCB_REG(0x33a4), (1 << 0));
339         writel(0, RCB_REG(0x33c8));
340         setbits_le32(RCB_REG(0x21b0), 0xf);
341 }
342
343 static void enable_hpet(void)
344 {
345         /* Move HPET to default address 0xfed00000 and enable it */
346         clrsetbits_le32(RCB_REG(HPTC), 3 << 0, 1 << 7);
347 }
348
349 static void enable_clock_gating(struct udevice *pch)
350 {
351         u32 reg32;
352         u16 reg16;
353
354         setbits_le32(RCB_REG(0x2234), 0xf);
355
356         dm_pci_read_config16(pch, GEN_PMCON_1, &reg16);
357         reg16 |= (1 << 2) | (1 << 11);
358         dm_pci_write_config16(pch, GEN_PMCON_1, reg16);
359
360         pch_iobp_update(pch, 0xeb007f07, ~0U, 1 << 31);
361         pch_iobp_update(pch, 0xeb004000, ~0U, 1 << 7);
362         pch_iobp_update(pch, 0xec007f07, ~0U, 1 << 31);
363         pch_iobp_update(pch, 0xec004000, ~0U, 1 << 7);
364
365         reg32 = readl(RCB_REG(CG));
366         reg32 |= (1 << 31);
367         reg32 |= (1 << 29) | (1 << 28);
368         reg32 |= (1 << 27) | (1 << 26) | (1 << 25) | (1 << 24);
369         reg32 |= (1 << 16);
370         reg32 |= (1 << 17);
371         reg32 |= (1 << 18);
372         reg32 |= (1 << 22);
373         reg32 |= (1 << 23);
374         reg32 &= ~(1 << 20);
375         reg32 |= (1 << 19);
376         reg32 |= (1 << 0);
377         reg32 |= (0xf << 1);
378         writel(reg32, RCB_REG(CG));
379
380         setbits_le32(RCB_REG(0x38c0), 0x7);
381         setbits_le32(RCB_REG(0x36d4), 0x6680c004);
382         setbits_le32(RCB_REG(0x3564), 0x3);
383 }
384
385 static void pch_disable_smm_only_flashing(struct udevice *pch)
386 {
387         u8 reg8;
388
389         debug("Enabling BIOS updates outside of SMM... ");
390         dm_pci_read_config8(pch, 0xdc, &reg8);  /* BIOS_CNTL */
391         reg8 &= ~(1 << 5);
392         dm_pci_write_config8(pch, 0xdc, reg8);
393 }
394
395 static void pch_fixups(struct udevice *pch)
396 {
397         u8 gen_pmcon_2;
398
399         /* Indicate DRAM init done for MRC S3 to know it can resume */
400         dm_pci_read_config8(pch, GEN_PMCON_2, &gen_pmcon_2);
401         gen_pmcon_2 |= (1 << 7);
402         dm_pci_write_config8(pch, GEN_PMCON_2, gen_pmcon_2);
403
404         /* Enable DMI ASPM in the PCH */
405         clrbits_le32(RCB_REG(0x2304), 1 << 10);
406         setbits_le32(RCB_REG(0x21a4), (1 << 11) | (1 << 10));
407         setbits_le32(RCB_REG(0x21a8), 0x3);
408 }
409
410 static void set_spi_speed(void)
411 {
412         u32 fdod;
413
414         /* Observe SPI Descriptor Component Section 0 */
415         writel(0x1000, RCB_REG(SPI_DESC_COMP0));
416
417         /* Extract the1 Write/Erase SPI Frequency from descriptor */
418         fdod = readl(RCB_REG(SPI_FREQ_WR_ERA));
419         fdod >>= 24;
420         fdod &= 7;
421
422         /* Set Software Sequence frequency to match */
423         clrsetbits_8(RCB_REG(SPI_FREQ_SWSEQ), 7, fdod);
424 }
425
426 static int lpc_init_extra(struct udevice *dev)
427 {
428         struct udevice *pch = dev->parent;
429
430         debug("pch: lpc_init\n");
431         dm_pci_write_bar32(pch, 0, 0);
432         dm_pci_write_bar32(pch, 1, 0xff800000);
433         dm_pci_write_bar32(pch, 2, 0xfec00000);
434         dm_pci_write_bar32(pch, 3, 0x800);
435         dm_pci_write_bar32(pch, 4, 0x900);
436
437         /* Set the value for PCI command register. */
438         dm_pci_write_config16(pch, PCI_COMMAND, 0x000f);
439
440         /* IO APIC initialization. */
441         pch_enable_apic(pch);
442
443         pch_enable_serial_irqs(pch);
444
445         /* Setup the PIRQ. */
446         pch_pirq_init(pch);
447
448         /* Setup power options. */
449         pch_power_options(pch);
450
451         /* Initialize power management */
452         switch (pch_silicon_type(pch)) {
453         case PCH_TYPE_CPT: /* CougarPoint */
454                 cpt_pm_init(pch);
455                 break;
456         case PCH_TYPE_PPT: /* PantherPoint */
457                 ppt_pm_init(pch);
458                 break;
459         default:
460                 printf("Unknown Chipset: %s\n", pch->name);
461                 return -ENOSYS;
462         }
463
464         /* Initialize the real time clock. */
465         pch_rtc_init(pch);
466
467         /* Initialize the High Precision Event Timers, if present. */
468         enable_hpet();
469
470         /* Initialize Clock Gating */
471         enable_clock_gating(pch);
472
473         pch_disable_smm_only_flashing(pch);
474
475         pch_fixups(pch);
476
477         return 0;
478 }
479
480 static int bd82x6x_lpc_early_init(struct udevice *dev)
481 {
482         set_spi_speed();
483
484         /* Setting up Southbridge. In the northbridge code. */
485         debug("Setting up static southbridge registers\n");
486         dm_pci_write_config32(dev->parent, PCH_RCBA_BASE,
487                               RCB_BASE_ADDRESS | 1);
488         dm_pci_write_config32(dev->parent, PMBASE, DEFAULT_PMBASE | 1);
489
490         /* Enable ACPI BAR */
491         dm_pci_write_config8(dev->parent, ACPI_CNTL, 0x80);
492
493         debug("Disabling watchdog reboot\n");
494         setbits_le32(RCB_REG(GCS), 1 >> 5);     /* No reset */
495         outw(1 << 11, DEFAULT_PMBASE | 0x60 | 0x08);    /* halt timer */
496
497         dm_pci_write_config32(dev->parent, GPIO_BASE, DEFAULT_GPIOBASE | 1);
498         dm_pci_write_config32(dev->parent, GPIO_CNTL, 0x10);
499
500         return 0;
501 }
502
503 static int bd82x6x_lpc_probe(struct udevice *dev)
504 {
505         int ret;
506
507         if (!(gd->flags & GD_FLG_RELOC)) {
508                 ret = lpc_common_early_init(dev);
509                 if (ret) {
510                         debug("%s: lpc_early_init() failed\n", __func__);
511                         return ret;
512                 }
513
514                 return bd82x6x_lpc_early_init(dev);
515         }
516
517         return lpc_init_extra(dev);
518 }
519
520 static const struct udevice_id bd82x6x_lpc_ids[] = {
521         { .compatible = "intel,bd82x6x-lpc" },
522         { }
523 };
524
525 U_BOOT_DRIVER(bd82x6x_lpc_drv) = {
526         .name           = "lpc",
527         .id             = UCLASS_LPC,
528         .of_match       = bd82x6x_lpc_ids,
529         .probe          = bd82x6x_lpc_probe,
530 };