1 /* 2 * (C) Copyright 2012 3 * Atmel Semiconductor <www.atmel.com> 4 * Written-by: Bo Shen <voice.shen@atmel.com> 5 * 6 * SPDX-License-Identifier: GPL-2.0+ 7 */ 8 9 #include <common.h> 10 #include <clk.h> 11 #include <dm.h> 12 #include <usb.h> 13 #include <asm/io.h> 14 #include <asm/arch/clk.h> 15 16 #include "ehci.h" 17 18 DECLARE_GLOBAL_DATA_PTR; 19 20 #ifndef CONFIG_DM_USB 21 22 int ehci_hcd_init(int index, enum usb_init_type init, 23 struct ehci_hccr **hccr, struct ehci_hcor **hcor) 24 { 25 /* Enable UTMI PLL */ 26 if (at91_upll_clk_enable()) 27 return -1; 28 29 /* Enable USB Host clock */ 30 at91_periph_clk_enable(ATMEL_ID_UHPHS); 31 32 *hccr = (struct ehci_hccr *)ATMEL_BASE_EHCI; 33 *hcor = (struct ehci_hcor *)((uint32_t)*hccr + 34 HC_LENGTH(ehci_readl(&(*hccr)->cr_capbase))); 35 36 return 0; 37 } 38 39 int ehci_hcd_stop(int index) 40 { 41 /* Disable USB Host Clock */ 42 at91_periph_clk_disable(ATMEL_ID_UHPHS); 43 44 /* Disable UTMI PLL */ 45 if (at91_upll_clk_disable()) 46 return -1; 47 48 return 0; 49 } 50 51 #else 52 53 struct ehci_atmel_priv { 54 struct ehci_ctrl ehci; 55 }; 56 57 static int ehci_atmel_enable_clk(struct udevice *dev) 58 { 59 struct clk clk; 60 int ret; 61 62 ret = clk_get_by_index(dev, 0, &clk); 63 if (ret) 64 return ret; 65 66 ret = clk_enable(&clk); 67 if (ret) 68 return ret; 69 70 ret = clk_get_by_index(dev, 1, &clk); 71 if (ret) 72 return -EINVAL; 73 74 ret = clk_enable(&clk); 75 if (ret) 76 return ret; 77 78 clk_free(&clk); 79 80 return 0; 81 } 82 83 static int ehci_atmel_probe(struct udevice *dev) 84 { 85 struct ehci_hccr *hccr; 86 struct ehci_hcor *hcor; 87 fdt_addr_t hcd_base; 88 int ret; 89 90 ret = ehci_atmel_enable_clk(dev); 91 if (ret) { 92 debug("Failed to enable USB Host clock\n"); 93 return ret; 94 } 95 96 /* 97 * Get the base address for EHCI controller from the device node 98 */ 99 hcd_base = dev_get_addr(dev); 100 if (hcd_base == FDT_ADDR_T_NONE) { 101 debug("Can't get the EHCI register base address\n"); 102 return -ENXIO; 103 } 104 105 hccr = (struct ehci_hccr *)hcd_base; 106 hcor = (struct ehci_hcor *) 107 ((u32)hccr + HC_LENGTH(ehci_readl(&hccr->cr_capbase))); 108 109 debug("echi-atmel: init hccr %x and hcor %x hc_length %d\n", 110 (u32)hccr, (u32)hcor, 111 (u32)HC_LENGTH(ehci_readl(&hccr->cr_capbase))); 112 113 return ehci_register(dev, hccr, hcor, NULL, 0, USB_INIT_HOST); 114 } 115 116 static const struct udevice_id ehci_usb_ids[] = { 117 { .compatible = "atmel,at91sam9g45-ehci", }, 118 { } 119 }; 120 121 U_BOOT_DRIVER(ehci_atmel) = { 122 .name = "ehci_atmel", 123 .id = UCLASS_USB, 124 .of_match = ehci_usb_ids, 125 .probe = ehci_atmel_probe, 126 .remove = ehci_deregister, 127 .ops = &ehci_usb_ops, 128 .platdata_auto_alloc_size = sizeof(struct usb_platdata), 129 .priv_auto_alloc_size = sizeof(struct ehci_atmel_priv), 130 .flags = DM_FLAG_ALLOC_PRIV_DMA, 131 }; 132 133 #endif 134