drivers/usb/host/ehci-marvell.c

   1 /*
   2  * (C) Copyright 2009
   3  * Marvell Semiconductor <www.marvell.com>
   4  * Written-by: Prafulla Wadaskar <prafulla@marvell.com>
   5  *
   6  * SPDX-License-Identifier:     GPL-2.0+
   7  */
   8
   9 #include <common.h>
  10 #include <asm/io.h>
  11 #include <usb.h>
  12 #include "ehci.h"
  13 #include <linux/mbus.h>
  14 #include <asm/arch/cpu.h>
  15 #include <dm.h>
  16
  17 #if defined(CONFIG_KIRKWOOD)
  18 #include <asm/arch/soc.h>
  19 #elif defined(CONFIG_ORION5X)
  20 #include <asm/arch/orion5x.h>
  21 #endif
  22
  23 DECLARE_GLOBAL_DATA_PTR;
  24
  25 #define USB_WINDOW_CTRL(i)      (0x320 + ((i) << 4))
  26 #define USB_WINDOW_BASE(i)      (0x324 + ((i) << 4))
  27 #define USB_TARGET_DRAM         0x0
  28
  29 /*
  30  * USB 2.0 Bridge Address Decoding registers setup
  31  */
  32 #ifdef CONFIG_DM_USB
  33
  34 struct ehci_mvebu_priv {
  35         struct ehci_ctrl ehci;
  36         fdt_addr_t hcd_base;
  37 };
  38
  39 /*
  40  * Once all the older Marvell SoC's (Orion, Kirkwood) are converted
  41  * to the common mvebu archticture including the mbus setup, this
  42  * will be the only function needed to configure the access windows
  43  */
  44 static void usb_brg_adrdec_setup(u32 base)
  45 {
  46         const struct mbus_dram_target_info *dram;
  47         int i;
  48
  49         dram = mvebu_mbus_dram_info();
  50
  51         for (i = 0; i < 4; i++) {
  52                 writel(0, base + USB_WINDOW_CTRL(i));
  53                 writel(0, base + USB_WINDOW_BASE(i));
  54         }
  55
  56         for (i = 0; i < dram->num_cs; i++) {
  57                 const struct mbus_dram_window *cs = dram->cs + i;
  58
  59                 /* Write size, attributes and target id to control register */
  60                 writel(((cs->size - 1) & 0xffff0000) | (cs->mbus_attr << 8) |
  61                        (dram->mbus_dram_target_id << 4) | 1,
  62                        base + USB_WINDOW_CTRL(i));
  63
  64                 /* Write base address to base register */
  65                 writel(cs->base, base + USB_WINDOW_BASE(i));
  66         }
  67 }
  68
  69 static int ehci_mvebu_probe(struct udevice *dev)
  70 {
  71         struct ehci_mvebu_priv *priv = dev_get_priv(dev);
  72         struct ehci_hccr *hccr;
  73         struct ehci_hcor *hcor;
  74
  75         /*
  76          * Get the base address for EHCI controller from the device node
  77          */
  78         priv->hcd_base = dev_get_addr(dev);
  79         if (priv->hcd_base == FDT_ADDR_T_NONE) {
  80                 debug("Can't get the EHCI register base address\n");
  81                 return -ENXIO;
  82         }
  83
  84         usb_brg_adrdec_setup(priv->hcd_base);
  85
  86         hccr = (struct ehci_hccr *)(priv->hcd_base + 0x100);
  87         hcor = (struct ehci_hcor *)
  88                 ((u32)hccr + HC_LENGTH(ehci_readl(&hccr->cr_capbase)));
  89
  90         debug("ehci-marvell: init hccr %x and hcor %x hc_length %d\n",
  91               (u32)hccr, (u32)hcor,
  92               (u32)HC_LENGTH(ehci_readl(&hccr->cr_capbase)));
  93
  94         return ehci_register(dev, hccr, hcor, NULL, 0, USB_INIT_HOST);
  95 }
  96
  97 static int ehci_mvebu_remove(struct udevice *dev)
  98 {
  99         int ret;
 100
 101         ret = ehci_deregister(dev);
 102         if (ret)
 103                 return ret;
 104
 105         return 0;
 106 }
 107
 108 static const struct udevice_id ehci_usb_ids[] = {
 109         { .compatible = "marvell,orion-ehci", },
 110         { }
 111 };
 112
 113 U_BOOT_DRIVER(ehci_mvebu) = {
 114         .name   = "ehci_mvebu",
 115         .id     = UCLASS_USB,
 116         .of_match = ehci_usb_ids,
 117         .probe = ehci_mvebu_probe,
 118         .remove = ehci_mvebu_remove,
 119         .ops    = &ehci_usb_ops,
 120         .platdata_auto_alloc_size = sizeof(struct usb_platdata),
 121         .priv_auto_alloc_size = sizeof(struct ehci_mvebu_priv),
 122         .flags  = DM_FLAG_ALLOC_PRIV_DMA,
 123 };
 124
 125 #else
 126 #define MVUSB_BASE(port)        MVUSB0_BASE
 127
 128 static void usb_brg_adrdec_setup(int index)
 129 {
 130         int i;
 131         u32 size, base, attrib;
 132
 133         for (i = 0; i < CONFIG_NR_DRAM_BANKS; i++) {
 134
 135                 /* Enable DRAM bank */
 136                 switch (i) {
 137                 case 0:
 138                         attrib = MVUSB0_CPU_ATTR_DRAM_CS0;
 139                         break;
 140                 case 1:
 141                         attrib = MVUSB0_CPU_ATTR_DRAM_CS1;
 142                         break;
 143                 case 2:
 144                         attrib = MVUSB0_CPU_ATTR_DRAM_CS2;
 145                         break;
 146                 case 3:
 147                         attrib = MVUSB0_CPU_ATTR_DRAM_CS3;
 148                         break;
 149                 default:
 150                         /* invalide bank, disable access */
 151                         attrib = 0;
 152                         break;
 153                 }
 154
 155                 size = gd->bd->bi_dram[i].size;
 156                 base = gd->bd->bi_dram[i].start;
 157                 if ((size) && (attrib))
 158                         writel(MVCPU_WIN_CTRL_DATA(size, USB_TARGET_DRAM,
 159                                                    attrib, MVCPU_WIN_ENABLE),
 160                                 MVUSB0_BASE + USB_WINDOW_CTRL(i));
 161                 else
 162                         writel(MVCPU_WIN_DISABLE,
 163                                MVUSB0_BASE + USB_WINDOW_CTRL(i));
 164
 165                 writel(base, MVUSB0_BASE + USB_WINDOW_BASE(i));
 166         }
 167 }
 168
 169 /*
 170  * Create the appropriate control structures to manage
 171  * a new EHCI host controller.
 172  */
 173 int ehci_hcd_init(int index, enum usb_init_type init,
 174                 struct ehci_hccr **hccr, struct ehci_hcor **hcor)
 175 {
 176         usb_brg_adrdec_setup(index);
 177
 178         *hccr = (struct ehci_hccr *)(MVUSB_BASE(index) + 0x100);
 179         *hcor = (struct ehci_hcor *)((uint32_t) *hccr
 180                         + HC_LENGTH(ehci_readl(&(*hccr)->cr_capbase)));
 181
 182         debug("ehci-marvell: init hccr %x and hcor %x hc_length %d\n",
 183                 (uint32_t)*hccr, (uint32_t)*hcor,
 184                 (uint32_t)HC_LENGTH(ehci_readl(&(*hccr)->cr_capbase)));
 185
 186         return 0;
 187 }
 188
 189 /*
 190  * Destroy the appropriate control structures corresponding
 191  * the the EHCI host controller.
 192  */
 193 int ehci_hcd_stop(int index)
 194 {
 195         return 0;
 196 }
 197
 198 #endif /* CONFIG_DM_USB */