1 /* 2 * host.c - ChipIdea USB host controller driver 3 * 4 * Copyright (c) 2012 Intel Corporation 5 * 6 * Author: Alexander Shishkin 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License version 2 as 10 * published by the Free Software Foundation. 11 * 12 * This program is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 * GNU General Public License for more details. 16 * 17 * You should have received a copy of the GNU General Public License 18 * along with this program; if not, write to the Free Software 19 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 20 */ 21 22 #include <linux/kernel.h> 23 #include <linux/io.h> 24 #include <linux/usb.h> 25 #include <linux/usb/hcd.h> 26 #include <linux/usb/chipidea.h> 27 28 #include "../host/ehci.h" 29 30 #include "ci.h" 31 #include "bits.h" 32 #include "host.h" 33 34 static struct hc_driver __read_mostly ci_ehci_hc_driver; 35 36 static irqreturn_t host_irq(struct ci13xxx *ci) 37 { 38 return usb_hcd_irq(ci->irq, ci->hcd); 39 } 40 41 static int host_start(struct ci13xxx *ci) 42 { 43 struct usb_hcd *hcd; 44 struct ehci_hcd *ehci; 45 int ret; 46 47 if (usb_disabled()) 48 return -ENODEV; 49 50 hcd = usb_create_hcd(&ci_ehci_hc_driver, ci->dev, dev_name(ci->dev)); 51 if (!hcd) 52 return -ENOMEM; 53 54 dev_set_drvdata(ci->dev, ci); 55 hcd->rsrc_start = ci->hw_bank.phys; 56 hcd->rsrc_len = ci->hw_bank.size; 57 hcd->regs = ci->hw_bank.abs; 58 hcd->has_tt = 1; 59 60 hcd->power_budget = ci->platdata->power_budget; 61 hcd->phy = ci->transceiver; 62 63 ehci = hcd_to_ehci(hcd); 64 ehci->caps = ci->hw_bank.cap; 65 ehci->has_hostpc = ci->hw_bank.lpm; 66 67 ret = usb_add_hcd(hcd, 0, 0); 68 if (ret) 69 usb_put_hcd(hcd); 70 else 71 ci->hcd = hcd; 72 73 if (ci->platdata->flags & CI13XXX_DISABLE_STREAMING) 74 hw_write(ci, OP_USBMODE, USBMODE_CI_SDIS, USBMODE_CI_SDIS); 75 76 return ret; 77 } 78 79 static void host_stop(struct ci13xxx *ci) 80 { 81 struct usb_hcd *hcd = ci->hcd; 82 83 usb_remove_hcd(hcd); 84 usb_put_hcd(hcd); 85 } 86 87 int ci_hdrc_host_init(struct ci13xxx *ci) 88 { 89 struct ci_role_driver *rdrv; 90 91 if (!hw_read(ci, CAP_DCCPARAMS, DCCPARAMS_HC)) 92 return -ENXIO; 93 94 rdrv = devm_kzalloc(ci->dev, sizeof(struct ci_role_driver), GFP_KERNEL); 95 if (!rdrv) 96 return -ENOMEM; 97 98 rdrv->start = host_start; 99 rdrv->stop = host_stop; 100 rdrv->irq = host_irq; 101 rdrv->name = "host"; 102 ci->roles[CI_ROLE_HOST] = rdrv; 103 104 ehci_init_driver(&ci_ehci_hc_driver, NULL); 105 106 return 0; 107 } 108