| 1 | /* |
| 2 | * Bus Glue for Atheros AR71xx built-in EHCI controller. |
| 3 | * |
| 4 | * Copyright (C) 2008-2010 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 | #include <linux/delay.h> |
| 17 | |
| 18 | #include <asm/mach-ar71xx/platform.h> |
| 19 | |
| 20 | extern int usb_disabled(void); |
| 21 | |
| 22 | static int ehci_ar71xx_init(struct usb_hcd *hcd) |
| 23 | { |
| 24 | struct ehci_hcd *ehci = hcd_to_ehci(hcd); |
| 25 | int ret; |
| 26 | |
| 27 | ehci->caps = hcd->regs; |
| 28 | ehci->regs = hcd->regs + |
| 29 | HC_LENGTH(ehci_readl(ehci, &ehci->caps->hc_capbase)); |
| 30 | ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params); |
| 31 | |
| 32 | ehci->sbrn = 0x20; |
| 33 | ehci->has_synopsys_hc_bug = 1; |
| 34 | |
| 35 | ehci_reset(ehci); |
| 36 | |
| 37 | ret = ehci_init(hcd); |
| 38 | if (ret) |
| 39 | return ret; |
| 40 | |
| 41 | ehci_port_power(ehci, 0); |
| 42 | |
| 43 | return 0; |
| 44 | } |
| 45 | |
| 46 | static int ehci_ar91xx_init(struct usb_hcd *hcd) |
| 47 | { |
| 48 | struct ehci_hcd *ehci = hcd_to_ehci(hcd); |
| 49 | int ret; |
| 50 | |
| 51 | ehci->caps = hcd->regs + 0x100; |
| 52 | ehci->regs = hcd->regs + 0x100 + |
| 53 | HC_LENGTH(ehci_readl(ehci, &ehci->caps->hc_capbase)); |
| 54 | ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params); |
| 55 | |
| 56 | hcd->has_tt = 1; |
| 57 | ehci->sbrn = 0x20; |
| 58 | |
| 59 | ehci_reset(ehci); |
| 60 | |
| 61 | ret = ehci_init(hcd); |
| 62 | if (ret) |
| 63 | return ret; |
| 64 | |
| 65 | ehci_port_power(ehci, 0); |
| 66 | |
| 67 | return 0; |
| 68 | } |
| 69 | |
| 70 | static int ehci_ar71xx_probe(const struct hc_driver *driver, |
| 71 | struct usb_hcd **hcd_out, |
| 72 | struct platform_device *pdev) |
| 73 | { |
| 74 | struct usb_hcd *hcd; |
| 75 | struct resource *res; |
| 76 | int irq; |
| 77 | int ret; |
| 78 | |
| 79 | res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); |
| 80 | if (!res) { |
| 81 | dev_dbg(&pdev->dev, "no IRQ specified for %s\n", |
| 82 | dev_name(&pdev->dev)); |
| 83 | return -ENODEV; |
| 84 | } |
| 85 | irq = res->start; |
| 86 | |
| 87 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
| 88 | if (!res) { |
| 89 | dev_dbg(&pdev->dev, "no base address specified for %s\n", |
| 90 | dev_name(&pdev->dev)); |
| 91 | return -ENODEV; |
| 92 | } |
| 93 | |
| 94 | hcd = usb_create_hcd(driver, &pdev->dev, dev_name(&pdev->dev)); |
| 95 | if (!hcd) |
| 96 | return -ENOMEM; |
| 97 | |
| 98 | hcd->rsrc_start = res->start; |
| 99 | hcd->rsrc_len = res->end - res->start + 1; |
| 100 | |
| 101 | if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) { |
| 102 | dev_dbg(&pdev->dev, "controller already in use\n"); |
| 103 | ret = -EBUSY; |
| 104 | goto err_put_hcd; |
| 105 | } |
| 106 | |
| 107 | hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len); |
| 108 | if (!hcd->regs) { |
| 109 | dev_dbg(&pdev->dev, "error mapping memory\n"); |
| 110 | ret = -EFAULT; |
| 111 | goto err_release_region; |
| 112 | } |
| 113 | |
| 114 | ret = usb_add_hcd(hcd, irq, IRQF_DISABLED | IRQF_SHARED); |
| 115 | if (ret) |
| 116 | goto err_iounmap; |
| 117 | |
| 118 | return 0; |
| 119 | |
| 120 | err_iounmap: |
| 121 | iounmap(hcd->regs); |
| 122 | |
| 123 | err_release_region: |
| 124 | release_mem_region(hcd->rsrc_start, hcd->rsrc_len); |
| 125 | err_put_hcd: |
| 126 | usb_put_hcd(hcd); |
| 127 | return ret; |
| 128 | } |
| 129 | |
| 130 | static void ehci_ar71xx_remove(struct usb_hcd *hcd, |
| 131 | struct platform_device *pdev) |
| 132 | { |
| 133 | usb_remove_hcd(hcd); |
| 134 | iounmap(hcd->regs); |
| 135 | release_mem_region(hcd->rsrc_start, hcd->rsrc_len); |
| 136 | usb_put_hcd(hcd); |
| 137 | } |
| 138 | |
| 139 | static const struct hc_driver ehci_ar71xx_hc_driver = { |
| 140 | .description = hcd_name, |
| 141 | .product_desc = "Atheros AR71xx built-in EHCI controller", |
| 142 | .hcd_priv_size = sizeof(struct ehci_hcd), |
| 143 | |
| 144 | .irq = ehci_irq, |
| 145 | .flags = HCD_MEMORY | HCD_USB2, |
| 146 | |
| 147 | .reset = ehci_ar71xx_init, |
| 148 | .start = ehci_run, |
| 149 | .stop = ehci_stop, |
| 150 | .shutdown = ehci_shutdown, |
| 151 | |
| 152 | .urb_enqueue = ehci_urb_enqueue, |
| 153 | .urb_dequeue = ehci_urb_dequeue, |
| 154 | .endpoint_disable = ehci_endpoint_disable, |
| 155 | .endpoint_reset = ehci_endpoint_reset, |
| 156 | |
| 157 | .get_frame_number = ehci_get_frame, |
| 158 | |
| 159 | .hub_status_data = ehci_hub_status_data, |
| 160 | .hub_control = ehci_hub_control, |
| 161 | #ifdef CONFIG_PM |
| 162 | .hub_suspend = ehci_hub_suspend, |
| 163 | .hub_resume = ehci_hub_resume, |
| 164 | #endif |
| 165 | .relinquish_port = ehci_relinquish_port, |
| 166 | .port_handed_over = ehci_port_handed_over, |
| 167 | |
| 168 | .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete, |
| 169 | }; |
| 170 | |
| 171 | static const struct hc_driver ehci_ar91xx_hc_driver = { |
| 172 | .description = hcd_name, |
| 173 | .product_desc = "Atheros AR91xx built-in EHCI controller", |
| 174 | .hcd_priv_size = sizeof(struct ehci_hcd), |
| 175 | .irq = ehci_irq, |
| 176 | .flags = HCD_MEMORY | HCD_USB2, |
| 177 | |
| 178 | .reset = ehci_ar91xx_init, |
| 179 | .start = ehci_run, |
| 180 | .stop = ehci_stop, |
| 181 | .shutdown = ehci_shutdown, |
| 182 | |
| 183 | .urb_enqueue = ehci_urb_enqueue, |
| 184 | .urb_dequeue = ehci_urb_dequeue, |
| 185 | .endpoint_disable = ehci_endpoint_disable, |
| 186 | .endpoint_reset = ehci_endpoint_reset, |
| 187 | |
| 188 | .get_frame_number = ehci_get_frame, |
| 189 | |
| 190 | .hub_status_data = ehci_hub_status_data, |
| 191 | .hub_control = ehci_hub_control, |
| 192 | #ifdef CONFIG_PM |
| 193 | .hub_suspend = ehci_hub_suspend, |
| 194 | .hub_resume = ehci_hub_resume, |
| 195 | #endif |
| 196 | .relinquish_port = ehci_relinquish_port, |
| 197 | .port_handed_over = ehci_port_handed_over, |
| 198 | |
| 199 | .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete, |
| 200 | }; |
| 201 | |
| 202 | static int ehci_ar71xx_driver_probe(struct platform_device *pdev) |
| 203 | { |
| 204 | struct ar71xx_ehci_platform_data *pdata; |
| 205 | struct usb_hcd *hcd = NULL; |
| 206 | int ret; |
| 207 | |
| 208 | if (usb_disabled()) |
| 209 | return -ENODEV; |
| 210 | |
| 211 | pdata = pdev->dev.platform_data; |
| 212 | if (!pdata) { |
| 213 | dev_err(&pdev->dev, "no platform data specified for %s\n", |
| 214 | dev_name(&pdev->dev)); |
| 215 | return -ENODEV; |
| 216 | } |
| 217 | |
| 218 | if (pdata->is_ar91xx) |
| 219 | ret = ehci_ar71xx_probe(&ehci_ar91xx_hc_driver, &hcd, pdev); |
| 220 | else |
| 221 | ret = ehci_ar71xx_probe(&ehci_ar71xx_hc_driver, &hcd, pdev); |
| 222 | |
| 223 | return ret; |
| 224 | } |
| 225 | |
| 226 | static int ehci_ar71xx_driver_remove(struct platform_device *pdev) |
| 227 | { |
| 228 | struct usb_hcd *hcd = platform_get_drvdata(pdev); |
| 229 | |
| 230 | ehci_ar71xx_remove(hcd, pdev); |
| 231 | return 0; |
| 232 | } |
| 233 | |
| 234 | MODULE_ALIAS("platform:ar71xx-ehci"); |
| 235 | |
| 236 | static struct platform_driver ehci_ar71xx_driver = { |
| 237 | .probe = ehci_ar71xx_driver_probe, |
| 238 | .remove = ehci_ar71xx_driver_remove, |
| 239 | .driver = { |
| 240 | .name = "ar71xx-ehci", |
| 241 | } |
| 242 | }; |
| 243 | |
