git.sur5r.net Git - u-boot/blob - drivers/ata/dwc_ahci.c

   1 /*
   2  * DWC SATA platform driver
   3  *
   4  * (C) Copyright 2016
   5  *     Texas Instruments Incorporated, <www.ti.com>
   6  *
   7  * Author: Mugunthan V N <mugunthanvnm@ti.com>
   8  *
   9  * SPDX-License-Identifier:     GPL-2.0+
  10  */
  11
  12 #include <common.h>
  13 #include <dm.h>
  14 #include <ahci.h>
  15 #include <scsi.h>
  16 #include <sata.h>
  17 #include <asm/arch/sata.h>
  18 #include <asm/io.h>
  19 #include <generic-phy.h>
  20
  21 DECLARE_GLOBAL_DATA_PTR;
  22
  23 struct dwc_ahci_priv {
  24         void *base;
  25         void *wrapper_base;
  26 };
  27
  28 static int dwc_ahci_bind(struct udevice *dev)
  29 {
  30         struct udevice *scsi_dev;
  31
  32         return ahci_bind_scsi(dev, &scsi_dev);
  33 }
  34
  35 static int dwc_ahci_ofdata_to_platdata(struct udevice *dev)
  36 {
  37         struct dwc_ahci_priv *priv = dev_get_priv(dev);
  38         fdt_addr_t addr;
  39
  40         priv->base = map_physmem(devfdt_get_addr(dev), sizeof(void *),
  41                                  MAP_NOCACHE);
  42
  43         addr = devfdt_get_addr_index(dev, 1);
  44         if (addr != FDT_ADDR_T_NONE) {
  45                 priv->wrapper_base = map_physmem(addr, sizeof(void *),
  46                                                  MAP_NOCACHE);
  47         } else {
  48                 priv->wrapper_base = NULL;
  49         }
  50
  51         return 0;
  52 }
  53
  54 static int dwc_ahci_probe(struct udevice *dev)
  55 {
  56         struct dwc_ahci_priv *priv = dev_get_priv(dev);
  57         int ret;
  58         struct phy phy;
  59
  60         ret = generic_phy_get_by_name(dev, "sata-phy", &phy);
  61         if (ret) {
  62                 pr_err("can't get the phy from DT\n");
  63                 return ret;
  64         }
  65
  66         ret = generic_phy_init(&phy);
  67         if (ret) {
  68                 pr_err("unable to initialize the sata phy\n");
  69                 return ret;
  70         }
  71
  72         ret = generic_phy_power_on(&phy);
  73         if (ret) {
  74                 pr_err("unable to power on the sata phy\n");
  75                 return ret;
  76         }
  77
  78         if (priv->wrapper_base) {
  79                 u32 val = TI_SATA_IDLE_NO | TI_SATA_STANDBY_NO;
  80
  81                 /* Enable SATA module, No Idle, No Standby */
  82                 writel(val, priv->wrapper_base + TI_SATA_SYSCONFIG);
  83         }
  84
  85         return ahci_probe_scsi(dev, (ulong)priv->base);
  86 }
  87
  88 static const struct udevice_id dwc_ahci_ids[] = {
  89         { .compatible = "snps,dwc-ahci" },
  90         { }
  91 };
  92
  93 U_BOOT_DRIVER(dwc_ahci) = {
  94         .name   = "dwc_ahci",
  95         .id     = UCLASS_AHCI,
  96         .of_match = dwc_ahci_ids,
  97         .bind   = dwc_ahci_bind,
  98         .ofdata_to_platdata = dwc_ahci_ofdata_to_platdata,
  99         .ops    = &scsi_ops,
 100         .probe  = dwc_ahci_probe,
 101         .priv_auto_alloc_size = sizeof(struct dwc_ahci_priv),
 102 };