src/soc/mediatek/common/mt6315.c

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2
   3 #include <console/console.h>
   4 #include <delay.h>
   5 #include <soc/mt6315.h>
   6 #include <soc/pmif.h>
   7 #include <soc/pmif_spmi.h>
   8
   9 static struct pmif *pmif_arb = NULL;
  10
  11 static void mt6315_read(u32 slvid, u32 reg, u32 *data)
  12 {
  13         pmif_arb->read(pmif_arb, slvid, reg, data);
  14 }
  15
  16 static void mt6315_write(u32 slvid, u32 reg, u32 data)
  17 {
  18         pmif_arb->write(pmif_arb, slvid, reg, data);
  19 }
  20
  21 void mt6315_write_field(u32 slvid, u32 reg, u32 val, u32 mask, u32 shift)
  22 {
  23         pmif_arb->write_field(pmif_arb, slvid, reg, val, mask, shift);
  24 }
  25
  26 static void mt6315_wdt_enable(u32 slvid)
  27 {
  28         mt6315_write(slvid, 0x3A9, 0x63);
  29         mt6315_write(slvid, 0x3A8, 0x15);
  30         mt6315_write(slvid, 0x127, 0x2);
  31         mt6315_write(slvid, 0x127, 0x1);
  32         mt6315_write(slvid, 0x127, 0x8);
  33         udelay(50);
  34         mt6315_write(slvid, 0x128, 0x8);
  35         mt6315_write(slvid, 0x3A8, 0);
  36         mt6315_write(slvid, 0x3A9, 0);
  37 }
  38
  39 void mt6315_buck_set_voltage(u32 slvid, u32 buck_id, u32 buck_uv)
  40 {
  41         unsigned int vol_reg, vol_val;
  42
  43         if (!pmif_arb)
  44                 die("ERROR: pmif_arb not initialized");
  45
  46         switch (buck_id) {
  47         case MT6315_BUCK_1:
  48                 vol_reg = MT6315_BUCK_TOP_ELR0;
  49                 break;
  50         case MT6315_BUCK_3:
  51                 vol_reg = MT6315_BUCK_TOP_ELR3;
  52                 break;
  53         default:
  54                 die("ERROR: Unknown buck_id %u", buck_id);
  55                 return;
  56         };
  57
  58         vol_val = buck_uv / 6250;
  59         mt6315_write(slvid, vol_reg, vol_val);
  60 }
  61
  62 u32 mt6315_buck_get_voltage(u32 slvid, u32 buck_id)
  63 {
  64         u32 vol_reg, vol;
  65
  66         if (!pmif_arb)
  67                 die("ERROR: pmif_arb not initialized");
  68
  69         switch (buck_id) {
  70         case MT6315_BUCK_1:
  71                 vol_reg = MT6315_BUCK_VBUCK1_DBG0;
  72                 break;
  73         case MT6315_BUCK_3:
  74                 vol_reg = MT6315_BUCK_VBUCK1_DBG3;
  75                 break;
  76         default:
  77                 die("ERROR: Unknown buck_id %u", buck_id);
  78                 return 0;
  79         };
  80
  81         mt6315_read(slvid, vol_reg, &vol);
  82         return vol * 6250;
  83 }
  84
  85 static void init_pmif_arb(void)
  86 {
  87         if (!pmif_arb) {
  88                 pmif_arb = get_pmif_controller(PMIF_SPMI, 0);
  89                 if (!pmif_arb)
  90                         die("ERROR: No spmi device");
  91         }
  92
  93         if (pmif_arb->is_pmif_init_done(pmif_arb))
  94                 die("ERROR - Failed to initialize pmif spmi");
  95 }
  96
  97 void mt6315_init(void)
  98 {
  99         size_t i;
 100
 101         init_pmif_arb();
 102
 103         for (i = 0; i < spmi_dev_cnt; i++)
 104                 mt6315_wdt_enable(spmi_dev[i].slvid);
 105
 106         mt6315_init_setting();
 107 }