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 error("can't get the phy from DT\n"); 62 return ret; 63 } 64 65 ret = generic_phy_init(&phy); 66 if (ret) { 67 error("unable to initialize the sata phy\n"); 68 return ret; 69 } 70 71 ret = generic_phy_power_on(&phy); 72 if (ret) { 73 error("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 }; 106