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_ofdata_to_platdata(struct udevice *dev)
  29 {
  30         struct dwc_ahci_priv *priv = dev_get_priv(dev);
  31         struct scsi_platdata *plat = dev_get_uclass_platdata(dev);
  32         fdt_addr_t addr;
  33
  34         plat->max_id = fdtdec_get_uint(gd->fdt_blob, dev_of_offset(dev),
  35                                        "max-id", CONFIG_SYS_SCSI_MAX_SCSI_ID);
  36         plat->max_lun = fdtdec_get_uint(gd->fdt_blob, dev_of_offset(dev),
  37                                         "max-lun", CONFIG_SYS_SCSI_MAX_LUN);
  38
  39         priv->base = map_physmem(devfdt_get_addr(dev), sizeof(void *),
  40                                  MAP_NOCACHE);
  41
  42         addr = devfdt_get_addr_index(dev, 1);
  43         if (addr != FDT_ADDR_T_NONE) {
  44                 priv->wrapper_base = map_physmem(addr, sizeof(void *),
  45                                                  MAP_NOCACHE);
  46         } else {
  47                 priv->wrapper_base = NULL;
  48         }
  49
  50         return 0;
  51 }
  52
  53 static int dwc_ahci_probe(struct udevice *dev)
  54 {
  55         struct dwc_ahci_priv *priv = dev_get_priv(dev);
  56         int ret;
  57         struct phy phy;
  58
  59         ret = generic_phy_get_by_name(dev, "sata-phy", &phy);
  60         if (ret) {
  61                 pr_err("can't get the phy from DT\n");
  62                 return ret;
  63         }
  64
  65         ret = generic_phy_init(&phy);
  66         if (ret) {
  67                 pr_err("unable to initialize the sata phy\n");
  68                 return ret;
  69         }
  70
  71         ret = generic_phy_power_on(&phy);
  72         if (ret) {
  73                 pr_err("unable to power on the sata phy\n");
  74                 return ret;
  75         }
  76
  77         if (priv->wrapper_base) {
  78                 u32 val = TI_SATA_IDLE_NO | TI_SATA_STANDBY_NO;
  79
  80                 /* Enable SATA module, No Idle, No Standby */
  81                 writel(val, priv->wrapper_base + TI_SATA_SYSCONFIG);
  82         }
  83
  84         ret = ahci_init_dm(dev, priv->base);
  85         if (ret)
  86                 return ret;
  87
  88         return achi_start_ports_dm(dev);
  89 }
  90
  91 static const struct udevice_id dwc_ahci_ids[] = {
  92         { .compatible = "snps,dwc-ahci" },
  93         { }
  94 };
  95
  96 U_BOOT_DRIVER(dwc_ahci) = {
  97         .name   = "dwc_ahci",
  98         .id     = UCLASS_SCSI,
  99         .of_match = dwc_ahci_ids,
 100         .ofdata_to_platdata = dwc_ahci_ofdata_to_platdata,
 101         .ops    = &scsi_ops,
 102         .probe  = dwc_ahci_probe,
 103         .priv_auto_alloc_size = sizeof(struct dwc_ahci_priv),
 104         .flags = DM_FLAG_ALLOC_PRIV_DMA,
 105 };