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 struct dwc_ahci_priv { 22 void *base; 23 void *wrapper_base; 24 }; 25 26 static int dwc_ahci_bind(struct udevice *dev) 27 { 28 struct udevice *scsi_dev; 29 30 return ahci_bind_scsi(dev, &scsi_dev); 31 } 32 33 static int dwc_ahci_ofdata_to_platdata(struct udevice *dev) 34 { 35 struct dwc_ahci_priv *priv = dev_get_priv(dev); 36 fdt_addr_t addr; 37 38 priv->base = map_physmem(devfdt_get_addr(dev), sizeof(void *), 39 MAP_NOCACHE); 40 41 addr = devfdt_get_addr_index(dev, 1); 42 if (addr != FDT_ADDR_T_NONE) { 43 priv->wrapper_base = map_physmem(addr, sizeof(void *), 44 MAP_NOCACHE); 45 } else { 46 priv->wrapper_base = NULL; 47 } 48 49 return 0; 50 } 51 52 static int dwc_ahci_probe(struct udevice *dev) 53 { 54 struct dwc_ahci_priv *priv = dev_get_priv(dev); 55 int ret; 56 struct phy phy; 57 58 ret = generic_phy_get_by_name(dev, "sata-phy", &phy); 59 if (ret) { 60 pr_err("can't get the phy from DT\n"); 61 return ret; 62 } 63 64 ret = generic_phy_init(&phy); 65 if (ret) { 66 pr_err("unable to initialize the sata phy\n"); 67 return ret; 68 } 69 70 ret = generic_phy_power_on(&phy); 71 if (ret) { 72 pr_err("unable to power on the sata phy\n"); 73 return ret; 74 } 75 76 if (priv->wrapper_base) { 77 u32 val = TI_SATA_IDLE_NO | TI_SATA_STANDBY_NO; 78 79 /* Enable SATA module, No Idle, No Standby */ 80 writel(val, priv->wrapper_base + TI_SATA_SYSCONFIG); 81 } 82 83 return ahci_probe_scsi(dev, (ulong)priv->base); 84 } 85 86 static const struct udevice_id dwc_ahci_ids[] = { 87 { .compatible = "snps,dwc-ahci" }, 88 { } 89 }; 90 91 U_BOOT_DRIVER(dwc_ahci) = { 92 .name = "dwc_ahci", 93 .id = UCLASS_AHCI, 94 .of_match = dwc_ahci_ids, 95 .bind = dwc_ahci_bind, 96 .ofdata_to_platdata = dwc_ahci_ofdata_to_platdata, 97 .ops = &scsi_ops, 98 .probe = dwc_ahci_probe, 99 .priv_auto_alloc_size = sizeof(struct dwc_ahci_priv), 100 }; 101