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#ifdef CONFIG_ARCH_OMAP2PLUS 17#include <asm/arch/sata.h> 18#endif 19#include <asm/io.h> 20#include <generic-phy.h> 21#include <linux/printk.h> 22 23struct dwc_ahci_priv { 24 void *base; 25 void *wrapper_base; 26}; 27 28static int dwc_ahci_bind(struct udevice *dev) 29{ 30 struct udevice *scsi_dev; 31 32 return ahci_bind_scsi(dev, &scsi_dev); 33} 34 35static int dwc_ahci_of_to_plat(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(dev_read_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 54static 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_debug("unable to initialize the sata phy\n"); 69 return ret; 70 } 71 72 ret = generic_phy_power_on(&phy); 73 if (ret) { 74 pr_debug("unable to power on the sata phy\n"); 75 return ret; 76 } 77 78#ifdef CONFIG_ARCH_OMAP2PLUS 79 if (priv->wrapper_base) { 80 u32 val = TI_SATA_IDLE_NO | TI_SATA_STANDBY_NO; 81 82 /* Enable SATA module, No Idle, No Standby */ 83 writel(val, priv->wrapper_base + TI_SATA_SYSCONFIG); 84 } 85#endif 86 87 return ahci_probe_scsi(dev, (ulong)priv->base); 88} 89 90static const struct udevice_id dwc_ahci_ids[] = { 91 { .compatible = "snps,dwc-ahci" }, 92 { } 93}; 94 95U_BOOT_DRIVER(dwc_ahci) = { 96 .name = "dwc_ahci", 97 .id = UCLASS_AHCI, 98 .of_match = dwc_ahci_ids, 99 .bind = dwc_ahci_bind, 100 .of_to_plat = dwc_ahci_of_to_plat, 101 .ops = &scsi_ops, 102 .probe = dwc_ahci_probe, 103 .priv_auto = sizeof(struct dwc_ahci_priv), 104}; 105