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 <mugunthanvnm@ti.com> 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 }; 100