drivers/ata/dwc_ahci.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * DWC SATA platform driver
   4  *
   5  * (C) Copyright 2016
   6  *     Texas Instruments Incorporated, <www.ti.com>
   7  *
   8  * Author: Mugunthan V N <[email protected]>
   9  */
  10
  11 #include <common.h>
  12 #include <dm.h>
  13 #include <ahci.h>
  14 #include <scsi.h>
  15 #include <sata.h>
  16 #include <asm/arch/sata.h>
  17 #include <asm/io.h>
  18 #include <generic-phy.h>
  19
  20 struct dwc_ahci_priv {
  21         void *base;
  22         void *wrapper_base;
  23 };
  24
  25 static int dwc_ahci_bind(struct udevice *dev)
  26 {
  27         struct udevice *scsi_dev;
  28
  29         return ahci_bind_scsi(dev, &scsi_dev);
  30 }
  31
  32 static int dwc_ahci_ofdata_to_platdata(struct udevice *dev)
  33 {
  34         struct dwc_ahci_priv *priv = dev_get_priv(dev);
  35         fdt_addr_t addr;
  36
  37         priv->base = map_physmem(devfdt_get_addr(dev), sizeof(void *),
  38                                  MAP_NOCACHE);
  39
  40         addr = devfdt_get_addr_index(dev, 1);
  41         if (addr != FDT_ADDR_T_NONE) {
  42                 priv->wrapper_base = map_physmem(addr, sizeof(void *),
  43                                                  MAP_NOCACHE);
  44         } else {
  45                 priv->wrapper_base = NULL;
  46         }
  47
  48         return 0;
  49 }
  50
  51 static int dwc_ahci_probe(struct udevice *dev)
  52 {
  53         struct dwc_ahci_priv *priv = dev_get_priv(dev);
  54         int ret;
  55         struct phy phy;
  56
  57         ret = generic_phy_get_by_name(dev, "sata-phy", &phy);
  58         if (ret) {
  59                 pr_err("can't get the phy from DT\n");
  60                 return ret;
  61         }
  62
  63         ret = generic_phy_init(&phy);
  64         if (ret) {
  65                 pr_err("unable to initialize the sata phy\n");
  66                 return ret;
  67         }
  68
  69         ret = generic_phy_power_on(&phy);
  70         if (ret) {
  71                 pr_err("unable to power on the sata phy\n");
  72                 return ret;
  73         }
  74
  75         if (priv->wrapper_base) {
  76                 u32 val = TI_SATA_IDLE_NO | TI_SATA_STANDBY_NO;
  77
  78                 /* Enable SATA module, No Idle, No Standby */
  79                 writel(val, priv->wrapper_base + TI_SATA_SYSCONFIG);
  80         }
  81
  82         return ahci_probe_scsi(dev, (ulong)priv->base);
  83 }
  84
  85 static const struct udevice_id dwc_ahci_ids[] = {
  86         { .compatible = "snps,dwc-ahci" },
  87         { }
  88 };
  89
  90 U_BOOT_DRIVER(dwc_ahci) = {
  91         .name   = "dwc_ahci",
  92         .id     = UCLASS_AHCI,
  93         .of_match = dwc_ahci_ids,
  94         .bind   = dwc_ahci_bind,
  95         .ofdata_to_platdata = dwc_ahci_ofdata_to_platdata,
  96         .ops    = &scsi_ops,
  97         .probe  = dwc_ahci_probe,
  98         .priv_auto_alloc_size = sizeof(struct dwc_ahci_priv),
  99 };