kernel/drivers/usb/host/ehci-ps3.c

   1 /*
   2  *  PS3 EHCI Host Controller driver
   3  *
   4  *  Copyright (C) 2006 Sony Computer Entertainment Inc.
   5  *  Copyright 2006 Sony Corp.
   6  *
   7  *  This program is free software; you can redistribute it and/or modify
   8  *  it under the terms of the GNU General Public License as published by
   9  *  the Free Software Foundation; version 2 of the License.
  10  *
  11  *  This program is distributed in the hope that it will be useful,
  12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *  GNU General Public License for more details.
  15  *
  16  *  You should have received a copy of the GNU General Public License
  17  *  along with this program; if not, write to the Free Software
  18  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  */
  20
  21 #include <asm/firmware.h>
  22 #include <asm/ps3.h>
  23
  24 static void ps3_ehci_setup_insnreg(struct ehci_hcd *ehci)
  25 {
  26         /* PS3 HC internal setup register offsets. */
  27
  28         enum ps3_ehci_hc_insnreg {
  29                 ps3_ehci_hc_insnreg01 = 0x084,
  30                 ps3_ehci_hc_insnreg02 = 0x088,
  31                 ps3_ehci_hc_insnreg03 = 0x08c,
  32         };
  33
  34         /* PS3 EHCI HC errata fix 316 - The PS3 EHCI HC will reset its
  35          * internal INSNREGXX setup regs back to the chip default values
  36          * on Host Controller Reset (CMD_RESET) or Light Host Controller
  37          * Reset (CMD_LRESET).  The work-around for this is for the HC
  38          * driver to re-initialise these regs when ever the HC is reset.
  39          */
  40
  41         /* Set burst transfer counts to 256 out, 32 in. */
  42
  43         writel_be(0x01000020, (void __iomem *)ehci->regs +
  44                 ps3_ehci_hc_insnreg01);
  45
  46         /* Enable burst transfer counts. */
  47
  48         writel_be(0x00000001, (void __iomem *)ehci->regs +
  49                 ps3_ehci_hc_insnreg03);
  50 }
  51
  52 static int ps3_ehci_hc_reset(struct usb_hcd *hcd)
  53 {
  54         int result;
  55         struct ehci_hcd *ehci = hcd_to_ehci(hcd);
  56
  57         ehci->big_endian_mmio = 1;
  58         ehci->caps = hcd->regs;
  59
  60         result = ehci_setup(hcd);
  61         if (result)
  62                 return result;
  63
  64         ps3_ehci_setup_insnreg(ehci);
  65
  66         return result;
  67 }
  68
  69 static const struct hc_driver ps3_ehci_hc_driver = {
  70         .description            = hcd_name,
  71         .product_desc           = "PS3 EHCI Host Controller",
  72         .hcd_priv_size          = sizeof(struct ehci_hcd),
  73         .irq                    = ehci_irq,
  74         .flags                  = HCD_MEMORY | HCD_USB2 | HCD_BH,
  75         .reset                  = ps3_ehci_hc_reset,
  76         .start                  = ehci_run,
  77         .stop                   = ehci_stop,
  78         .shutdown               = ehci_shutdown,
  79         .urb_enqueue            = ehci_urb_enqueue,
  80         .urb_dequeue            = ehci_urb_dequeue,
  81         .endpoint_disable       = ehci_endpoint_disable,
  82         .endpoint_reset         = ehci_endpoint_reset,
  83         .get_frame_number       = ehci_get_frame,
  84         .hub_status_data        = ehci_hub_status_data,
  85         .hub_control            = ehci_hub_control,
  86 #if defined(CONFIG_PM)
  87         .bus_suspend            = ehci_bus_suspend,
  88         .bus_resume             = ehci_bus_resume,
  89 #endif
  90         .relinquish_port        = ehci_relinquish_port,
  91         .port_handed_over       = ehci_port_handed_over,
  92
  93         .clear_tt_buffer_complete       = ehci_clear_tt_buffer_complete,
  94 };
  95
  96 static int ps3_ehci_probe(struct ps3_system_bus_device *dev)
  97 {
  98         int result;
  99         struct usb_hcd *hcd;
 100         unsigned int virq;
 101         static u64 dummy_mask = DMA_BIT_MASK(32);
 102
 103         if (usb_disabled()) {
 104                 result = -ENODEV;
 105                 goto fail_start;
 106         }
 107
 108         result = ps3_open_hv_device(dev);
 109
 110         if (result) {
 111                 dev_dbg(&dev->core, "%s:%d: ps3_open_hv_device failed\n",
 112                         __func__, __LINE__);
 113                 goto fail_open;
 114         }
 115
 116         result = ps3_dma_region_create(dev->d_region);
 117
 118         if (result) {
 119                 dev_dbg(&dev->core, "%s:%d: ps3_dma_region_create failed: "
 120                         "(%d)\n", __func__, __LINE__, result);
 121                 BUG_ON("check region type");
 122                 goto fail_dma_region;
 123         }
 124
 125         result = ps3_mmio_region_create(dev->m_region);
 126
 127         if (result) {
 128                 dev_dbg(&dev->core, "%s:%d: ps3_map_mmio_region failed\n",
 129                         __func__, __LINE__);
 130                 result = -EPERM;
 131                 goto fail_mmio_region;
 132         }
 133
 134         dev_dbg(&dev->core, "%s:%d: mmio mapped_addr %lxh\n", __func__,
 135                 __LINE__, dev->m_region->lpar_addr);
 136
 137         result = ps3_io_irq_setup(PS3_BINDING_CPU_ANY, dev->interrupt_id, &virq);
 138
 139         if (result) {
 140                 dev_dbg(&dev->core, "%s:%d: ps3_construct_io_irq(%d) failed.\n",
 141                         __func__, __LINE__, virq);
 142                 result = -EPERM;
 143                 goto fail_irq;
 144         }
 145
 146         dev->core.dma_mask = &dummy_mask; /* FIXME: for improper usb code */
 147
 148         hcd = usb_create_hcd(&ps3_ehci_hc_driver, &dev->core, dev_name(&dev->core));
 149
 150         if (!hcd) {
 151                 dev_dbg(&dev->core, "%s:%d: usb_create_hcd failed\n", __func__,
 152                         __LINE__);
 153                 result = -ENOMEM;
 154                 goto fail_create_hcd;
 155         }
 156
 157         hcd->rsrc_start = dev->m_region->lpar_addr;
 158         hcd->rsrc_len = dev->m_region->len;
 159
 160         if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name))
 161                 dev_dbg(&dev->core, "%s:%d: request_mem_region failed\n",
 162                         __func__, __LINE__);
 163
 164         hcd->regs = ioremap(dev->m_region->lpar_addr, dev->m_region->len);
 165
 166         if (!hcd->regs) {
 167                 dev_dbg(&dev->core, "%s:%d: ioremap failed\n", __func__,
 168                         __LINE__);
 169                 result = -EPERM;
 170                 goto fail_ioremap;
 171         }
 172
 173         dev_dbg(&dev->core, "%s:%d: hcd->rsrc_start %lxh\n", __func__, __LINE__,
 174                 (unsigned long)hcd->rsrc_start);
 175         dev_dbg(&dev->core, "%s:%d: hcd->rsrc_len   %lxh\n", __func__, __LINE__,
 176                 (unsigned long)hcd->rsrc_len);
 177         dev_dbg(&dev->core, "%s:%d: hcd->regs       %lxh\n", __func__, __LINE__,
 178                 (unsigned long)hcd->regs);
 179         dev_dbg(&dev->core, "%s:%d: virq            %lu\n", __func__, __LINE__,
 180                 (unsigned long)virq);
 181
 182         ps3_system_bus_set_drvdata(dev, hcd);
 183
 184         result = usb_add_hcd(hcd, virq, 0);
 185
 186         if (result) {
 187                 dev_dbg(&dev->core, "%s:%d: usb_add_hcd failed (%d)\n",
 188                         __func__, __LINE__, result);
 189                 goto fail_add_hcd;
 190         }
 191
 192         device_wakeup_enable(hcd->self.controller);
 193         return result;
 194
 195 fail_add_hcd:
 196         iounmap(hcd->regs);
 197 fail_ioremap:
 198         release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
 199         usb_put_hcd(hcd);
 200 fail_create_hcd:
 201         ps3_io_irq_destroy(virq);
 202 fail_irq:
 203         ps3_free_mmio_region(dev->m_region);
 204 fail_mmio_region:
 205         ps3_dma_region_free(dev->d_region);
 206 fail_dma_region:
 207         ps3_close_hv_device(dev);
 208 fail_open:
 209 fail_start:
 210         return result;
 211 }
 212
 213 static int ps3_ehci_remove(struct ps3_system_bus_device *dev)
 214 {
 215         unsigned int tmp;
 216         struct usb_hcd *hcd = ps3_system_bus_get_drvdata(dev);
 217
 218         BUG_ON(!hcd);
 219
 220         dev_dbg(&dev->core, "%s:%d: regs %p\n", __func__, __LINE__, hcd->regs);
 221         dev_dbg(&dev->core, "%s:%d: irq %u\n", __func__, __LINE__, hcd->irq);
 222
 223         tmp = hcd->irq;
 224
 225         usb_remove_hcd(hcd);
 226
 227         ps3_system_bus_set_drvdata(dev, NULL);
 228
 229         BUG_ON(!hcd->regs);
 230         iounmap(hcd->regs);
 231
 232         release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
 233         usb_put_hcd(hcd);
 234
 235         ps3_io_irq_destroy(tmp);
 236         ps3_free_mmio_region(dev->m_region);
 237
 238         ps3_dma_region_free(dev->d_region);
 239         ps3_close_hv_device(dev);
 240
 241         return 0;
 242 }
 243
 244 static int __init ps3_ehci_driver_register(struct ps3_system_bus_driver *drv)
 245 {
 246         return firmware_has_feature(FW_FEATURE_PS3_LV1)
 247                 ? ps3_system_bus_driver_register(drv)
 248                 : 0;
 249 }
 250
 251 static void ps3_ehci_driver_unregister(struct ps3_system_bus_driver *drv)
 252 {
 253         if (firmware_has_feature(FW_FEATURE_PS3_LV1))
 254                 ps3_system_bus_driver_unregister(drv);
 255 }
 256
 257 MODULE_ALIAS(PS3_MODULE_ALIAS_EHCI);
 258
 259 static struct ps3_system_bus_driver ps3_ehci_driver = {
 260         .core.name = "ps3-ehci-driver",
 261         .core.owner = THIS_MODULE,
 262         .match_id = PS3_MATCH_ID_EHCI,
 263         .probe = ps3_ehci_probe,
 264         .remove = ps3_ehci_remove,
 265         .shutdown = ps3_ehci_remove,
 266 };