src/mainboard/dell/optiplex_9010/sch5545_ec_early.c

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2
   3 #include <arch/io.h>
   4 #include <superio/smsc/sch5545/sch5545.h>
   5 #include <superio/smsc/sch5545/sch5545_emi.h>
   6
   7 #include "sch5545_ec.h"
   8
   9 static uint16_t emi_bar;
  10
  11 static const struct ec_val_reg ec_gpio_init_table[] = {
  12         /*
  13          * Probably some early GPIO initialization, setting GPIO functions.
  14          * The LSBs in third column match the GPIO config registers offsets for
  15          * non-default GPIOs.
  16          */
  17         { EC_GPIO_PP | EC_GPIO_FUNC1, 0x08cc }, /* GP063 (def) / KBDRST# */
  18         { EC_GPIO_PP | EC_GPIO_FUNC1, 0x08d0 }, /* GP064 (def) / A20M */
  19         { EC_GPIO_PP | EC_GPIO_FUNC1, 0x089c }, /* GP047 / TXD1 (def) */
  20         { EC_GPIO_PP | EC_GPIO_FUNC1, 0x0878 }, /* GP036 (def) / SMBCLK1 */
  21         { EC_GPIO_PP | EC_GPIO_FUNC1, 0x0880 }, /* GP040 (def) / SMBDAT1 */
  22         { EC_GPIO_OD | EC_GPIO_FUNC1, 0x0884 }, /* GP041 (def) / IO_PME# */
  23         { EC_GPIO_PP | EC_GPIO_FUNC1, 0x08e4 }, /* GP071 (def) / IO_SMI# */
  24         { EC_GPIO_PP | EC_GPIO_FUNC1, 0x08e0 }, /* GP070 (def) / SPEAKER */
  25         { EC_GPIO_PP | EC_GPIO_FUNC1, 0x0848 }, /* GP022 (def) / PWM1 */
  26         { EC_GPIO_PP | EC_GPIO_FUNC1, 0x084c }, /* GP023 (def) / PWM2 */
  27         { EC_GPIO_PP | EC_GPIO_FUNC1, 0x0850 }, /* GP024 (def) / PWM3 */
  28         { EC_GPIO_PP | EC_GPIO_FUNC1, 0x083c }, /* GP017 / TACH1 (def) */
  29         { EC_GPIO_PP | EC_GPIO_FUNC1, 0x0840 }, /* GP020 / TACH2 (def) */
  30         { EC_GPIO_PP | EC_GPIO_FUNC1, 0x0844 }, /* GP021 / TACH3 (def) */
  31         { EC_GPIO_PP | EC_GPIO_FUNC1, 0x0814 }, /* GP005 (def) / PECI_REQ# */
  32 };
  33
  34 static const struct ec_val_reg ec_hwm_early_init_table[] = {
  35         /* Probably some early hardware monitor initialization */
  36         { 0xff, 0x0005 },
  37         { 0x30, 0x00f0 },
  38         { 0x10, 0x00f8 },
  39         { 0x00, 0x00f9 },
  40         { 0x00, 0x00fa },
  41         { 0x00, 0x00fb },
  42         { 0x00, 0x00ea },
  43         { 0x00, 0x00eb },
  44         { 0x7c, 0x00ef },
  45         { 0x03, 0x006e },
  46         { 0x51, 0x02d0 },
  47         { 0x01, 0x02d2 },
  48         { 0x12, 0x059a },
  49         { 0x11, 0x059e },
  50         { 0x14, 0x05a2 },
  51         { 0x55, 0x05a3 },
  52         { 0x01, 0x02db },
  53         { 0x01, 0x0040 },
  54 };
  55
  56 static void ec_read_write_reg_timeout(uint16_t ldn, uint8_t *val, uint16_t reg,
  57                                       uint8_t rw_bit)
  58 {
  59         uint16_t timeout = 0;
  60         rw_bit &= 1;
  61         sch5545_emi_ec2h_mailbox_clear();
  62         sch5545_emi_ec_write16(0x8000, (ldn << 1) | 0x100 | rw_bit);
  63
  64         sch5545_emi_set_ec_addr(0x8004);
  65
  66         if (rw_bit)
  67                 outb(*val, emi_bar + SCH5545_EMI_EC_DATA);
  68
  69         outb(reg & 0xff, emi_bar + SCH5545_EMI_EC_DATA + 2);
  70         outb((reg >> 8) & 0xff, emi_bar + SCH5545_EMI_EC_DATA + 3);
  71         sch5545_emi_h2ec_mbox_write(1);
  72
  73         do {
  74                 timeout++;
  75                 if ((sch5545_emi_ec2h_mbox_read() & 1) != 0)
  76                         break;
  77         } while (timeout < 0xfff);
  78
  79         sch5545_emi_set_int_src(0x11);
  80         sch5545_emi_h2ec_mbox_write(0xc0);
  81
  82         if (!rw_bit)
  83                 *val = inb(emi_bar + SCH5545_EMI_EC_DATA);
  84 }
  85
  86 static void ec_init_gpios(void)
  87 {
  88         unsigned int i;
  89         uint8_t val;
  90
  91         for (i = 0; i < ARRAY_SIZE(ec_gpio_init_table); i++) {
  92                 val = ec_gpio_init_table[i].val;
  93                 ec_read_write_reg_timeout(EC_GPIO_LDN, &val, ec_gpio_init_table[i].reg,
  94                                           WRITE_OP);
  95         }
  96 }
  97
  98 static void ec_early_hwm_init(void)
  99 {
 100         unsigned int i;
 101         uint8_t val;
 102
 103         for (i = 0; i < ARRAY_SIZE(ec_hwm_early_init_table); i++) {
 104                 val = ec_hwm_early_init_table[i].val;
 105                 ec_read_write_reg_timeout(EC_HWM_LDN, &val, ec_hwm_early_init_table[i].reg,
 106                                           WRITE_OP);
 107         }
 108 }
 109
 110 void sch5545_ec_early_init(void)
 111 {
 112         emi_bar = sch5545_read_emi_bar(0x2e);
 113
 114         ec_init_gpios();
 115         ec_early_hwm_init();
 116 }