| 1 | /* |
| 2 | * ADM5120 HCD (Host Controller Driver) for USB |
| 3 | * |
| 4 | * Copyright (C) 2007-2008 Gabor Juhos <juhosg@openwrt.org> |
| 5 | * |
| 6 | * This file was derived from: drivers/usb/host/ohci-au1xxx.c |
| 7 | * (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at> |
| 8 | * (C) Copyright 2000-2002 David Brownell <dbrownell@users.sourceforge.net> |
| 9 | * (C) Copyright 2002 Hewlett-Packard Company |
| 10 | * |
| 11 | * Written by Christopher Hoover <ch@hpl.hp.com> |
| 12 | * Based on fragments of previous driver by Russell King et al. |
| 13 | * |
| 14 | * Modified for LH7A404 from ahcd-sa1111.c |
| 15 | * by Durgesh Pattamatta <pattamattad@sharpsec.com> |
| 16 | * Modified for AMD Alchemy Au1xxx |
| 17 | * by Matt Porter <mporter@kernel.crashing.org> |
| 18 | * |
| 19 | * This program is free software; you can redistribute it and/or modify it |
| 20 | * under the terms of the GNU General Public License version 2 as published |
| 21 | * by the Free Software Foundation. |
| 22 | * |
| 23 | */ |
| 24 | |
| 25 | #include <linux/platform_device.h> |
| 26 | #include <linux/signal.h> |
| 27 | |
| 28 | #include <asm/bootinfo.h> |
| 29 | #include <asm/mach-adm5120/adm5120_defs.h> |
| 30 | |
| 31 | #ifdef DEBUG |
| 32 | #define HCD_DBG(f, a...) printk(KERN_DEBUG "%s: " f, hcd_name, ## a) |
| 33 | #else |
| 34 | #define HCD_DBG(f, a...) do {} while (0) |
| 35 | #endif |
| 36 | #define HCD_ERR(f, a...) printk(KERN_ERR "%s: " f, hcd_name, ## a) |
| 37 | #define HCD_INFO(f, a...) printk(KERN_INFO "%s: " f, hcd_name, ## a) |
| 38 | |
| 39 | /*-------------------------------------------------------------------------*/ |
| 40 | |
| 41 | static int admhc_adm5120_probe(const struct hc_driver *driver, |
| 42 | struct platform_device *dev) |
| 43 | { |
| 44 | int retval; |
| 45 | struct usb_hcd *hcd; |
| 46 | int irq; |
| 47 | struct resource *regs; |
| 48 | |
| 49 | /* sanity checks */ |
| 50 | regs = platform_get_resource(dev, IORESOURCE_MEM, 0); |
| 51 | if (!regs) { |
| 52 | HCD_DBG("no IOMEM resource found\n"); |
| 53 | return -ENODEV; |
| 54 | } |
| 55 | |
| 56 | irq = platform_get_irq(dev, 0); |
| 57 | if (irq < 0) { |
| 58 | HCD_DBG("no IRQ resource found\n"); |
| 59 | return -ENODEV; |
| 60 | } |
| 61 | |
| 62 | hcd = usb_create_hcd(driver, &dev->dev, "ADM5120"); |
| 63 | if (!hcd) |
| 64 | return -ENOMEM; |
| 65 | |
| 66 | hcd->rsrc_start = regs->start; |
| 67 | hcd->rsrc_len = regs->end - regs->start + 1; |
| 68 | |
| 69 | if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) { |
| 70 | HCD_DBG("request_mem_region failed\n"); |
| 71 | retval = -EBUSY; |
| 72 | goto err_dev; |
| 73 | } |
| 74 | |
| 75 | hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len); |
| 76 | if (!hcd->regs) { |
| 77 | HCD_DBG("ioremap failed\n"); |
| 78 | retval = -ENOMEM; |
| 79 | goto err_mem; |
| 80 | } |
| 81 | |
| 82 | admhc_hcd_init(hcd_to_admhcd(hcd)); |
| 83 | |
| 84 | retval = usb_add_hcd(hcd, irq, 0); |
| 85 | if (retval) |
| 86 | goto err_io; |
| 87 | |
| 88 | return 0; |
| 89 | |
| 90 | err_io: |
| 91 | iounmap(hcd->regs); |
| 92 | err_mem: |
| 93 | release_mem_region(hcd->rsrc_start, hcd->rsrc_len); |
| 94 | err_dev: |
| 95 | usb_put_hcd(hcd); |
| 96 | return retval; |
| 97 | } |
| 98 | |
| 99 | |
| 100 | /* may be called without controller electrically present */ |
| 101 | /* may be called with controller, bus, and devices active */ |
| 102 | |
| 103 | static void admhc_adm5120_remove(struct usb_hcd *hcd, |
| 104 | struct platform_device *dev) |
| 105 | { |
| 106 | usb_remove_hcd(hcd); |
| 107 | iounmap(hcd->regs); |
| 108 | release_mem_region(hcd->rsrc_start, hcd->rsrc_len); |
| 109 | usb_put_hcd(hcd); |
| 110 | } |
| 111 | |
| 112 | static int __devinit admhc_adm5120_start(struct usb_hcd *hcd) |
| 113 | { |
| 114 | struct admhcd *ahcd = hcd_to_admhcd(hcd); |
| 115 | int ret; |
| 116 | |
| 117 | ret = admhc_init(ahcd); |
| 118 | if (ret < 0) { |
| 119 | HCD_ERR("unable to init %s\n", hcd->self.bus_name); |
| 120 | goto err; |
| 121 | } |
| 122 | |
| 123 | ret = admhc_run(ahcd); |
| 124 | if (ret < 0) { |
| 125 | HCD_ERR("unable to run %s\n", hcd->self.bus_name); |
| 126 | goto err_stop; |
| 127 | } |
| 128 | |
| 129 | return 0; |
| 130 | |
| 131 | err_stop: |
| 132 | admhc_stop(hcd); |
| 133 | err: |
| 134 | return ret; |
| 135 | } |
| 136 | |
| 137 | static const struct hc_driver adm5120_hc_driver = { |
| 138 | .description = hcd_name, |
| 139 | .product_desc = "ADM5120 built-in USB 1.1 Host Controller", |
| 140 | .hcd_priv_size = sizeof(struct admhcd), |
| 141 | |
| 142 | /* |
| 143 | * generic hardware linkage |
| 144 | */ |
| 145 | .irq = admhc_irq, |
| 146 | .flags = HCD_USB11 | HCD_MEMORY, |
| 147 | |
| 148 | /* |
| 149 | * basic lifecycle operations |
| 150 | */ |
| 151 | .start = admhc_adm5120_start, |
| 152 | .stop = admhc_stop, |
| 153 | .shutdown = admhc_shutdown, |
| 154 | |
| 155 | /* |
| 156 | * managing i/o requests and associated device resources |
| 157 | */ |
| 158 | .urb_enqueue = admhc_urb_enqueue, |
| 159 | .urb_dequeue = admhc_urb_dequeue, |
| 160 | .endpoint_disable = admhc_endpoint_disable, |
| 161 | |
| 162 | /* |
| 163 | * scheduling support |
| 164 | */ |
| 165 | .get_frame_number = admhc_get_frame_number, |
| 166 | |
| 167 | /* |
| 168 | * root hub support |
| 169 | */ |
| 170 | .hub_status_data = admhc_hub_status_data, |
| 171 | .hub_control = admhc_hub_control, |
| 172 | #ifdef CONFIG_PM |
| 173 | .bus_suspend = admhc_bus_suspend, |
| 174 | .bus_resume = admhc_bus_resume, |
| 175 | #endif |
| 176 | .start_port_reset = admhc_start_port_reset, |
| 177 | }; |
| 178 | |
| 179 | static int usb_hcd_adm5120_probe(struct platform_device *pdev) |
| 180 | { |
| 181 | int ret; |
| 182 | |
| 183 | ret = admhc_adm5120_probe(&adm5120_hc_driver, pdev); |
| 184 | |
| 185 | return ret; |
| 186 | } |
| 187 | |
| 188 | static int usb_hcd_adm5120_remove(struct platform_device *pdev) |
| 189 | { |
| 190 | struct usb_hcd *hcd = platform_get_drvdata(pdev); |
| 191 | |
| 192 | admhc_adm5120_remove(hcd, pdev); |
| 193 | |
| 194 | return 0; |
| 195 | } |
| 196 | |
| 197 | #ifdef CONFIG_PM |
| 198 | /* TODO */ |
| 199 | static int usb_hcd_adm5120_suspend(struct platform_device *dev) |
| 200 | { |
| 201 | struct usb_hcd *hcd = platform_get_drvdata(dev); |
| 202 | |
| 203 | return 0; |
| 204 | } |
| 205 | |
| 206 | static int usb_hcd_adm5120_resume(struct platform_device *dev) |
| 207 | { |
| 208 | struct usb_hcd *hcd = platform_get_drvdata(dev); |
| 209 | |
| 210 | return 0; |
| 211 | } |
| 212 | #else |
| 213 | #define usb_hcd_adm5120_suspend NULL |
| 214 | #define usb_hcd_adm5120_resume NULL |
| 215 | #endif /* CONFIG_PM */ |
| 216 | |
| 217 | static struct platform_driver usb_hcd_adm5120_driver = { |
| 218 | .probe = usb_hcd_adm5120_probe, |
| 219 | .remove = usb_hcd_adm5120_remove, |
| 220 | .shutdown = usb_hcd_platform_shutdown, |
| 221 | .suspend = usb_hcd_adm5120_suspend, |
| 222 | .resume = usb_hcd_adm5120_resume, |
| 223 | .driver = { |
| 224 | .name = "adm5120-hcd", |
| 225 | .owner = THIS_MODULE, |
| 226 | }, |
| 227 | }; |
| 228 | |
| 229 | |
