1/* 2 * Bus Glue for Atheros AR7XXX/AR9XXX built-in EHCI controller. 3 * 4 * Copyright (C) 2008-2011 Gabor Juhos <juhosg@openwrt.org> 5 * Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org> 6 * 7 * Parts of this file are based on Atheros' 2.6.15 BSP 8 * Copyright (C) 2007 Atheros Communications, Inc. 9 * 10 * This program is free software; you can redistribute it and/or modify it 11 * under the terms of the GNU General Public License version 2 as published 12 * by the Free Software Foundation. 13 */ 14 15#include <linux/platform_device.h> 16 17enum { 18 EHCI_ATH79_IP_V1 = 0, 19 EHCI_ATH79_IP_V2, 20}; 21 22static const struct platform_device_id ehci_ath79_id_table[] = { 23 { 24 .name = "ar71xx-ehci", 25 .driver_data = EHCI_ATH79_IP_V1, 26 }, 27 { 28 .name = "ar724x-ehci", 29 .driver_data = EHCI_ATH79_IP_V2, 30 }, 31 { 32 .name = "ar913x-ehci", 33 .driver_data = EHCI_ATH79_IP_V2, 34 }, 35 { 36 .name = "ar933x-ehci", 37 .driver_data = EHCI_ATH79_IP_V2, 38 }, 39 { 40 /* terminating entry */ 41 }, 42}; 43 44MODULE_DEVICE_TABLE(platform, ehci_ath79_id_table); 45 46static int ehci_ath79_init(struct usb_hcd *hcd) 47{ 48 struct ehci_hcd *ehci = hcd_to_ehci(hcd); 49 struct platform_device *pdev = to_platform_device(hcd->self.controller); 50 const struct platform_device_id *id; 51 int ret; 52 53 id = platform_get_device_id(pdev); 54 if (!id) { 55 dev_err(hcd->self.controller, "missing device id\n"); 56 return -EINVAL; 57 } 58 59 switch (id->driver_data) { 60 case EHCI_ATH79_IP_V1: 61 ehci->has_synopsys_hc_bug = 1; 62 63 ehci->caps = hcd->regs; 64 ehci->regs = hcd->regs + 65 HC_LENGTH(ehci, 66 ehci_readl(ehci, &ehci->caps->hc_capbase)); 67 break; 68 69 case EHCI_ATH79_IP_V2: 70 hcd->has_tt = 1; 71 72 ehci->caps = hcd->regs + 0x100; 73 ehci->regs = hcd->regs + 0x100 + 74 HC_LENGTH(ehci, 75 ehci_readl(ehci, &ehci->caps->hc_capbase)); 76 break; 77 78 default: 79 BUG(); 80 } 81 82 dbg_hcs_params(ehci, "reset"); 83 dbg_hcc_params(ehci, "reset"); 84 ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params); 85 ehci->sbrn = 0x20; 86 87 ehci_reset(ehci); 88 89 ret = ehci_init(hcd); 90 if (ret) 91 return ret; 92 93 ehci_port_power(ehci, 0); 94 95 return 0; 96} 97 98static const struct hc_driver ehci_ath79_hc_driver = { 99 .description = hcd_name, 100 .product_desc = "Atheros built-in EHCI controller", 101 .hcd_priv_size = sizeof(struct ehci_hcd), 102 .irq = ehci_irq, 103 .flags = HCD_MEMORY | HCD_USB2, 104 105 .reset = ehci_ath79_init, 106 .start = ehci_run, 107 .stop = ehci_stop, 108 .shutdown = ehci_shutdown, 109 110 .urb_enqueue = ehci_urb_enqueue, 111 .urb_dequeue = ehci_urb_dequeue, 112 .endpoint_disable = ehci_endpoint_disable, 113 .endpoint_reset = ehci_endpoint_reset, 114 115 .get_frame_number = ehci_get_frame, 116 117 .hub_status_data = ehci_hub_status_data, 118 .hub_control = ehci_hub_control, 119 120 .relinquish_port = ehci_relinquish_port, 121 .port_handed_over = ehci_port_handed_over, 122 123 .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete, 124}; 125 126static int ehci_ath79_probe(struct platform_device *pdev) 127{ 128 struct usb_hcd *hcd; 129 struct resource *res; 130 int irq; 131 int ret; 132 133 if (usb_disabled()) 134 return -ENODEV; 135 136 res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); 137 if (!res) { 138 dev_dbg(&pdev->dev, "no IRQ specified\n"); 139 return -ENODEV; 140 } 141 irq = res->start; 142 143 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 144 if (!res) { 145 dev_dbg(&pdev->dev, "no base address specified\n"); 146 return -ENODEV; 147 } 148 149 hcd = usb_create_hcd(&ehci_ath79_hc_driver, &pdev->dev, 150 dev_name(&pdev->dev)); 151 if (!hcd) 152 return -ENOMEM; 153 154 hcd->rsrc_start = res->start; 155 hcd->rsrc_len = resource_size(res); 156 157 if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) { 158 dev_dbg(&pdev->dev, "controller already in use\n"); 159 ret = -EBUSY; 160 goto err_put_hcd; 161 } 162 163 hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len); 164 if (!hcd->regs) { 165 dev_dbg(&pdev->dev, "error mapping memory\n"); 166 ret = -EFAULT; 167 goto err_release_region; 168 } 169 170 ret = usb_add_hcd(hcd, irq, IRQF_SHARED); 171 if (ret) 172 goto err_iounmap; 173 174 return 0; 175 176err_iounmap: 177 iounmap(hcd->regs); 178 179err_release_region: 180 release_mem_region(hcd->rsrc_start, hcd->rsrc_len); 181err_put_hcd: 182 usb_put_hcd(hcd); 183 return ret; 184} 185 186static int ehci_ath79_remove(struct platform_device *pdev) 187{ 188 struct usb_hcd *hcd = platform_get_drvdata(pdev); 189 190 usb_remove_hcd(hcd); 191 iounmap(hcd->regs); 192 release_mem_region(hcd->rsrc_start, hcd->rsrc_len); 193 usb_put_hcd(hcd); 194 195 return 0; 196} 197 198static struct platform_driver ehci_ath79_driver = { 199 .probe = ehci_ath79_probe, 200 .remove = ehci_ath79_remove, 201 .id_table = ehci_ath79_id_table, 202 .driver = { 203 .owner = THIS_MODULE, 204 .name = "ath79-ehci", 205 } 206}; 207 208MODULE_ALIAS(PLATFORM_MODULE_PREFIX "ath79-ehci"); 209