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 #define USB2_SBUSCFG_OFF 0x90 30 31 #define USB_SBUSCFG_BAWR_OFF 0x6 32 #define USB_SBUSCFG_BARD_OFF 0x3 33 #define USB_SBUSCFG_AHBBRST_OFF 0x0 34 35 #define USB_SBUSCFG_BAWR_ALIGN_64B 0x4 36 #define USB_SBUSCFG_BARD_ALIGN_64B 0x4 37 #define USB_SBUSCFG_AHBBRST_INCR16 0x7 38 39 /* 40 * USB 2.0 Bridge Address Decoding registers setup 41 */ 42 #ifdef CONFIG_DM_USB 43 44 struct ehci_mvebu_priv { 45 struct ehci_ctrl ehci; 46 fdt_addr_t hcd_base; 47 }; 48 49 /* 50 * Once all the older Marvell SoC's (Orion, Kirkwood) are converted 51 * to the common mvebu archticture including the mbus setup, this 52 * will be the only function needed to configure the access windows 53 */ 54 static void usb_brg_adrdec_setup(void *base) 55 { 56 const struct mbus_dram_target_info *dram; 57 int i; 58 59 dram = mvebu_mbus_dram_info(); 60 61 for (i = 0; i < 4; i++) { 62 writel(0, base + USB_WINDOW_CTRL(i)); 63 writel(0, base + USB_WINDOW_BASE(i)); 64 } 65 66 for (i = 0; i < dram->num_cs; i++) { 67 const struct mbus_dram_window *cs = dram->cs + i; 68 69 /* Write size, attributes and target id to control register */ 70 writel(((cs->size - 1) & 0xffff0000) | (cs->mbus_attr << 8) | 71 (dram->mbus_dram_target_id << 4) | 1, 72 base + USB_WINDOW_CTRL(i)); 73 74 /* Write base address to base register */ 75 writel(cs->base, base + USB_WINDOW_BASE(i)); 76 } 77 } 78 79 static void marvell_ehci_powerup_fixup(struct ehci_ctrl *ctrl, 80 uint32_t *status_reg, uint32_t *reg) 81 { 82 struct ehci_mvebu_priv *priv = ctrl->priv; 83 84 /* 85 * Set default value for reg SBUSCFG, which is Control for the AMBA 86 * system bus interface: 87 * BAWR = BARD = 4 : Align rd/wr bursts packets larger than 64 bytes 88 * AHBBRST = 7 : Align AHB burst for packets larger than 64 bytes 89 */ 90 writel((USB_SBUSCFG_BAWR_ALIGN_64B << USB_SBUSCFG_BAWR_OFF) | 91 (USB_SBUSCFG_BARD_ALIGN_64B << USB_SBUSCFG_BARD_OFF) | 92 (USB_SBUSCFG_AHBBRST_INCR16 << USB_SBUSCFG_AHBBRST_OFF), 93 priv->hcd_base + USB2_SBUSCFG_OFF); 94 95 mdelay(50); 96 } 97 98 static struct ehci_ops marvell_ehci_ops = { 99 .powerup_fixup = NULL, 100 }; 101 102 static int ehci_mvebu_probe(struct udevice *dev) 103 { 104 struct ehci_mvebu_priv *priv = dev_get_priv(dev); 105 struct ehci_hccr *hccr; 106 struct ehci_hcor *hcor; 107 108 /* 109 * Get the base address for EHCI controller from the device node 110 */ 111 priv->hcd_base = dev_get_addr(dev); 112 if (priv->hcd_base == FDT_ADDR_T_NONE) { 113 debug("Can't get the EHCI register base address\n"); 114 return -ENXIO; 115 } 116 117 /* 118 * For SoCs without hlock like Armada3700 we need to program the sbuscfg 119 * reg to guarantee AHB master's burst will not overrun or underrun 120 * the FIFO. Otherwise all USB2 write option will fail. 121 * Also, the address decoder doesn't need to get setup with this 122 * SoC, so don't call usb_brg_adrdec_setup(). 123 */ 124 if (of_device_is_compatible(dev, "marvell,armada3700-ehci")) 125 marvell_ehci_ops.powerup_fixup = marvell_ehci_powerup_fixup; 126 else 127 usb_brg_adrdec_setup((void *)priv->hcd_base); 128 129 hccr = (struct ehci_hccr *)(priv->hcd_base + 0x100); 130 hcor = (struct ehci_hcor *) 131 ((uintptr_t)hccr + HC_LENGTH(ehci_readl(&hccr->cr_capbase))); 132 133 debug("ehci-marvell: init hccr %lx and hcor %lx hc_length %ld\n", 134 (uintptr_t)hccr, (uintptr_t)hcor, 135 (uintptr_t)HC_LENGTH(ehci_readl(&hccr->cr_capbase))); 136 137 return ehci_register(dev, hccr, hcor, &marvell_ehci_ops, 0, 138 USB_INIT_HOST); 139 } 140 141 static const struct udevice_id ehci_usb_ids[] = { 142 { .compatible = "marvell,orion-ehci", }, 143 { .compatible = "marvell,armada3700-ehci", }, 144 { } 145 }; 146 147 U_BOOT_DRIVER(ehci_mvebu) = { 148 .name = "ehci_mvebu", 149 .id = UCLASS_USB, 150 .of_match = ehci_usb_ids, 151 .probe = ehci_mvebu_probe, 152 .remove = ehci_deregister, 153 .ops = &ehci_usb_ops, 154 .platdata_auto_alloc_size = sizeof(struct usb_platdata), 155 .priv_auto_alloc_size = sizeof(struct ehci_mvebu_priv), 156 .flags = DM_FLAG_ALLOC_PRIV_DMA, 157 }; 158 159 #else 160 #define MVUSB_BASE(port) MVUSB0_BASE 161 162 static void usb_brg_adrdec_setup(int index) 163 { 164 int i; 165 u32 size, base, attrib; 166 167 for (i = 0; i < CONFIG_NR_DRAM_BANKS; i++) { 168 169 /* Enable DRAM bank */ 170 switch (i) { 171 case 0: 172 attrib = MVUSB0_CPU_ATTR_DRAM_CS0; 173 break; 174 case 1: 175 attrib = MVUSB0_CPU_ATTR_DRAM_CS1; 176 break; 177 case 2: 178 attrib = MVUSB0_CPU_ATTR_DRAM_CS2; 179 break; 180 case 3: 181 attrib = MVUSB0_CPU_ATTR_DRAM_CS3; 182 break; 183 default: 184 /* invalide bank, disable access */ 185 attrib = 0; 186 break; 187 } 188 189 size = gd->bd->bi_dram[i].size; 190 base = gd->bd->bi_dram[i].start; 191 if ((size) && (attrib)) 192 writel(MVCPU_WIN_CTRL_DATA(size, USB_TARGET_DRAM, 193 attrib, MVCPU_WIN_ENABLE), 194 MVUSB0_BASE + USB_WINDOW_CTRL(i)); 195 else 196 writel(MVCPU_WIN_DISABLE, 197 MVUSB0_BASE + USB_WINDOW_CTRL(i)); 198 199 writel(base, MVUSB0_BASE + USB_WINDOW_BASE(i)); 200 } 201 } 202 203 /* 204 * Create the appropriate control structures to manage 205 * a new EHCI host controller. 206 */ 207 int ehci_hcd_init(int index, enum usb_init_type init, 208 struct ehci_hccr **hccr, struct ehci_hcor **hcor) 209 { 210 usb_brg_adrdec_setup(index); 211 212 *hccr = (struct ehci_hccr *)(MVUSB_BASE(index) + 0x100); 213 *hcor = (struct ehci_hcor *)((uint32_t) *hccr 214 + HC_LENGTH(ehci_readl(&(*hccr)->cr_capbase))); 215 216 debug("ehci-marvell: init hccr %x and hcor %x hc_length %d\n", 217 (uint32_t)*hccr, (uint32_t)*hcor, 218 (uint32_t)HC_LENGTH(ehci_readl(&(*hccr)->cr_capbase))); 219 220 return 0; 221 } 222 223 /* 224 * Destroy the appropriate control structures corresponding 225 * the the EHCI host controller. 226 */ 227 int ehci_hcd_stop(int index) 228 { 229 return 0; 230 } 231 232 #endif /* CONFIG_DM_USB */ 233