1/* 2 * OHCI HCD (Host Controller Driver) for USB. 3 * 4 * (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at> 5 * (C) Copyright 2000-2002 David Brownell <dbrownell@users.sourceforge.net> 6 * (C) Copyright 2002 Hewlett-Packard Company 7 * 8 * Bus Glue for Moschip MCS814x. 9 * 10 * Written by Christopher Hoover <ch@hpl.hp.com> 11 * Based on fragments of previous driver by Russell King et al. 12 * 13 * Modified for LH7A404 from ohci-sa1111.c 14 * by Durgesh Pattamatta <pattamattad@sharpsec.com> 15 * 16 * Modified for pxa27x from ohci-lh7a404.c 17 * by Nick Bane <nick@cecomputing.co.uk> 26-8-2004 18 * 19 * Modified for mcs814x from ohci-mcs814x.c 20 * by Lennert Buytenhek <buytenh@wantstofly.org> 28-2-2006 21 * Based on an earlier driver by Ray Lehtiniemi 22 * 23 * This file is licenced under the GPL. 24 */ 25 26#include <linux/device.h> 27#include <linux/signal.h> 28#include <linux/platform_device.h> 29#include <linux/of.h> 30 31static int usb_hcd_mcs814x_probe(const struct hc_driver *driver, 32 struct platform_device *pdev) 33{ 34 int retval; 35 struct usb_hcd *hcd; 36 37 if (pdev->resource[1].flags != IORESOURCE_IRQ) { 38 pr_debug("resource[1] is not IORESOURCE_IRQ"); 39 return -ENOMEM; 40 } 41 42 pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32); 43 pdev->dev.dma_mask = &pdev->dev.coherent_dma_mask; 44 45 hcd = usb_create_hcd(driver, &pdev->dev, "mcs814x"); 46 if (hcd == NULL) 47 return -ENOMEM; 48 49 hcd->rsrc_start = pdev->resource[0].start; 50 hcd->rsrc_len = pdev->resource[0].end - pdev->resource[0].start + 1; 51 if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) { 52 usb_put_hcd(hcd); 53 retval = -EBUSY; 54 goto err1; 55 } 56 57 hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len); 58 if (hcd->regs == NULL) { 59 pr_debug("ioremap failed"); 60 retval = -ENOMEM; 61 goto err2; 62 } 63 64 ohci_hcd_init(hcd_to_ohci(hcd)); 65 66 retval = usb_add_hcd(hcd, pdev->resource[1].start, IRQF_DISABLED); 67 if (retval == 0) 68 return retval; 69 70 iounmap(hcd->regs); 71err2: 72 release_mem_region(hcd->rsrc_start, hcd->rsrc_len); 73err1: 74 usb_put_hcd(hcd); 75 76 return retval; 77} 78 79static void usb_hcd_mcs814x_remove(struct usb_hcd *hcd, 80 struct platform_device *pdev) 81{ 82 usb_remove_hcd(hcd); 83 iounmap(hcd->regs); 84 release_mem_region(hcd->rsrc_start, hcd->rsrc_len); 85 usb_put_hcd(hcd); 86} 87 88static int __devinit ohci_mcs814x_start(struct usb_hcd *hcd) 89{ 90 struct ohci_hcd *ohci = hcd_to_ohci(hcd); 91 int ret; 92 93 ret = ohci_init(ohci); 94 if (ret < 0) 95 return ret; 96 97 ret = ohci_run(ohci); 98 if (ret < 0) { 99 ohci_err(ohci, "can't start %s", hcd->self.bus_name); 100 ohci_stop(hcd); 101 return ret; 102 } 103 104 return 0; 105} 106 107static struct hc_driver ohci_mcs814x_hc_driver = { 108 .description = hcd_name, 109 .product_desc = "MCS814X OHCI", 110 .hcd_priv_size = sizeof(struct ohci_hcd), 111 .irq = ohci_irq, 112 .flags = HCD_USB11 | HCD_MEMORY, 113 .start = ohci_mcs814x_start, 114 .stop = ohci_stop, 115 .shutdown = ohci_shutdown, 116 .urb_enqueue = ohci_urb_enqueue, 117 .urb_dequeue = ohci_urb_dequeue, 118 .endpoint_disable = ohci_endpoint_disable, 119 .get_frame_number = ohci_get_frame, 120 .hub_status_data = ohci_hub_status_data, 121 .hub_control = ohci_hub_control, 122#ifdef CONFIG_PM 123 .bus_suspend = ohci_bus_suspend, 124 .bus_resume = ohci_bus_resume, 125#endif 126 .start_port_reset = ohci_start_port_reset, 127}; 128 129extern int usb_disabled(void); 130 131static int ohci_hcd_mcs814x_drv_probe(struct platform_device *pdev) 132{ 133 int ret; 134 135 ret = -ENODEV; 136 if (!usb_disabled()) 137 ret = usb_hcd_mcs814x_probe(&ohci_mcs814x_hc_driver, pdev); 138 139 return ret; 140} 141 142static int ohci_hcd_mcs814x_drv_remove(struct platform_device *pdev) 143{ 144 struct usb_hcd *hcd = platform_get_drvdata(pdev); 145 146 usb_hcd_mcs814x_remove(hcd, pdev); 147 148 return 0; 149} 150 151#ifdef CONFIG_PM 152static int ohci_hcd_mcs814x_drv_suspend(struct platform_device *pdev, pm_message_t state) 153{ 154 struct usb_hcd *hcd = platform_get_drvdata(pdev); 155 struct ohci_hcd *ohci = hcd_to_ohci(hcd); 156 157 if (time_before(jiffies, ohci->next_statechange)) 158 msleep(5); 159 ohci->next_statechange = jiffies; 160 161 hcd->state = HC_STATE_SUSPENDED; 162 163 return 0; 164} 165 166static int ohci_hcd_mcs814x_drv_resume(struct platform_device *pdev) 167{ 168 struct usb_hcd *hcd = platform_get_drvdata(pdev); 169 struct ohci_hcd *ohci = hcd_to_ohci(hcd); 170 int status; 171 172 if (time_before(jiffies, ohci->next_statechange)) 173 msleep(5); 174 ohci->next_statechange = jiffies; 175 176 ohci_finish_controller_resume(hcd); 177 return 0; 178} 179#endif 180 181static const struct of_device_id mcs814x_ohci_id[] = { 182 { .compatible = "moschip,mcs814x-ohci" }, 183 { .compatible = "ohci-le" }, 184 { /* sentinel */ }, 185}; 186 187static struct platform_driver ohci_hcd_mcs814x_driver = { 188 .probe = ohci_hcd_mcs814x_drv_probe, 189 .remove = ohci_hcd_mcs814x_drv_remove, 190 .shutdown = usb_hcd_platform_shutdown, 191#ifdef CONFIG_PM 192 .suspend = ohci_hcd_mcs814x_drv_suspend, 193 .resume = ohci_hcd_mcs814x_drv_resume, 194#endif 195 .driver = { 196 .name = "mcs814x-ohci", 197 .owner = THIS_MODULE, 198 .of_match_table = mcs814x_ohci_id, 199 }, 200}; 201 202MODULE_ALIAS("platform:mcs814x-ohci"); 203