1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * PS3 EHCI Host Controller driver 4 * 5 * Copyright (C) 2006 Sony Computer Entertainment Inc. 6 * Copyright 2006 Sony Corp. 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 as published by 10 * the Free Software Foundation; version 2 of the License. 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 20 */ 21 22 #include <asm/firmware.h> 23 #include <asm/ps3.h> 24 25 static void ps3_ehci_setup_insnreg(struct ehci_hcd *ehci) 26 { 27 /* PS3 HC internal setup register offsets. */ 28 29 enum ps3_ehci_hc_insnreg { 30 ps3_ehci_hc_insnreg01 = 0x084, 31 ps3_ehci_hc_insnreg02 = 0x088, 32 ps3_ehci_hc_insnreg03 = 0x08c, 33 }; 34 35 /* PS3 EHCI HC errata fix 316 - The PS3 EHCI HC will reset its 36 * internal INSNREGXX setup regs back to the chip default values 37 * on Host Controller Reset (CMD_RESET) or Light Host Controller 38 * Reset (CMD_LRESET). The work-around for this is for the HC 39 * driver to re-initialise these regs when ever the HC is reset. 40 */ 41 42 /* Set burst transfer counts to 256 out, 32 in. */ 43 44 writel_be(0x01000020, (void __iomem *)ehci->regs + 45 ps3_ehci_hc_insnreg01); 46 47 /* Enable burst transfer counts. */ 48 49 writel_be(0x00000001, (void __iomem *)ehci->regs + 50 ps3_ehci_hc_insnreg03); 51 } 52 53 static int ps3_ehci_hc_reset(struct usb_hcd *hcd) 54 { 55 int result; 56 struct ehci_hcd *ehci = hcd_to_ehci(hcd); 57 58 ehci->big_endian_mmio = 1; 59 ehci->caps = hcd->regs; 60 61 result = ehci_setup(hcd); 62 if (result) 63 return result; 64 65 ps3_ehci_setup_insnreg(ehci); 66 67 return result; 68 } 69 70 static const struct hc_driver ps3_ehci_hc_driver = { 71 .description = hcd_name, 72 .product_desc = "PS3 EHCI Host Controller", 73 .hcd_priv_size = sizeof(struct ehci_hcd), 74 .irq = ehci_irq, 75 .flags = HCD_MEMORY | HCD_USB2 | HCD_BH, 76 .reset = ps3_ehci_hc_reset, 77 .start = ehci_run, 78 .stop = ehci_stop, 79 .shutdown = ehci_shutdown, 80 .urb_enqueue = ehci_urb_enqueue, 81 .urb_dequeue = ehci_urb_dequeue, 82 .endpoint_disable = ehci_endpoint_disable, 83 .endpoint_reset = ehci_endpoint_reset, 84 .get_frame_number = ehci_get_frame, 85 .hub_status_data = ehci_hub_status_data, 86 .hub_control = ehci_hub_control, 87 #if defined(CONFIG_PM) 88 .bus_suspend = ehci_bus_suspend, 89 .bus_resume = ehci_bus_resume, 90 #endif 91 .relinquish_port = ehci_relinquish_port, 92 .port_handed_over = ehci_port_handed_over, 93 94 .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete, 95 }; 96 97 static int ps3_ehci_probe(struct ps3_system_bus_device *dev) 98 { 99 int result; 100 struct usb_hcd *hcd; 101 unsigned int virq; 102 static u64 dummy_mask = DMA_BIT_MASK(32); 103 104 if (usb_disabled()) { 105 result = -ENODEV; 106 goto fail_start; 107 } 108 109 result = ps3_open_hv_device(dev); 110 111 if (result) { 112 dev_dbg(&dev->core, "%s:%d: ps3_open_hv_device failed\n", 113 __func__, __LINE__); 114 goto fail_open; 115 } 116 117 result = ps3_dma_region_create(dev->d_region); 118 119 if (result) { 120 dev_dbg(&dev->core, "%s:%d: ps3_dma_region_create failed: " 121 "(%d)\n", __func__, __LINE__, result); 122 BUG_ON("check region type"); 123 goto fail_dma_region; 124 } 125 126 result = ps3_mmio_region_create(dev->m_region); 127 128 if (result) { 129 dev_dbg(&dev->core, "%s:%d: ps3_map_mmio_region failed\n", 130 __func__, __LINE__); 131 result = -EPERM; 132 goto fail_mmio_region; 133 } 134 135 dev_dbg(&dev->core, "%s:%d: mmio mapped_addr %lxh\n", __func__, 136 __LINE__, dev->m_region->lpar_addr); 137 138 result = ps3_io_irq_setup(PS3_BINDING_CPU_ANY, dev->interrupt_id, &virq); 139 140 if (result) { 141 dev_dbg(&dev->core, "%s:%d: ps3_construct_io_irq(%d) failed.\n", 142 __func__, __LINE__, virq); 143 result = -EPERM; 144 goto fail_irq; 145 } 146 147 dev->core.dma_mask = &dummy_mask; /* FIXME: for improper usb code */ 148 149 hcd = usb_create_hcd(&ps3_ehci_hc_driver, &dev->core, dev_name(&dev->core)); 150 151 if (!hcd) { 152 dev_dbg(&dev->core, "%s:%d: usb_create_hcd failed\n", __func__, 153 __LINE__); 154 result = -ENOMEM; 155 goto fail_create_hcd; 156 } 157 158 hcd->rsrc_start = dev->m_region->lpar_addr; 159 hcd->rsrc_len = dev->m_region->len; 160 161 if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) 162 dev_dbg(&dev->core, "%s:%d: request_mem_region failed\n", 163 __func__, __LINE__); 164 165 hcd->regs = ioremap(dev->m_region->lpar_addr, dev->m_region->len); 166 167 if (!hcd->regs) { 168 dev_dbg(&dev->core, "%s:%d: ioremap failed\n", __func__, 169 __LINE__); 170 result = -EPERM; 171 goto fail_ioremap; 172 } 173 174 dev_dbg(&dev->core, "%s:%d: hcd->rsrc_start %lxh\n", __func__, __LINE__, 175 (unsigned long)hcd->rsrc_start); 176 dev_dbg(&dev->core, "%s:%d: hcd->rsrc_len %lxh\n", __func__, __LINE__, 177 (unsigned long)hcd->rsrc_len); 178 dev_dbg(&dev->core, "%s:%d: hcd->regs %lxh\n", __func__, __LINE__, 179 (unsigned long)hcd->regs); 180 dev_dbg(&dev->core, "%s:%d: virq %lu\n", __func__, __LINE__, 181 (unsigned long)virq); 182 183 ps3_system_bus_set_drvdata(dev, hcd); 184 185 result = usb_add_hcd(hcd, virq, 0); 186 187 if (result) { 188 dev_dbg(&dev->core, "%s:%d: usb_add_hcd failed (%d)\n", 189 __func__, __LINE__, result); 190 goto fail_add_hcd; 191 } 192 193 device_wakeup_enable(hcd->self.controller); 194 return result; 195 196 fail_add_hcd: 197 iounmap(hcd->regs); 198 fail_ioremap: 199 release_mem_region(hcd->rsrc_start, hcd->rsrc_len); 200 usb_put_hcd(hcd); 201 fail_create_hcd: 202 ps3_io_irq_destroy(virq); 203 fail_irq: 204 ps3_free_mmio_region(dev->m_region); 205 fail_mmio_region: 206 ps3_dma_region_free(dev->d_region); 207 fail_dma_region: 208 ps3_close_hv_device(dev); 209 fail_open: 210 fail_start: 211 return result; 212 } 213 214 static int ps3_ehci_remove(struct ps3_system_bus_device *dev) 215 { 216 unsigned int tmp; 217 struct usb_hcd *hcd = ps3_system_bus_get_drvdata(dev); 218 219 BUG_ON(!hcd); 220 221 dev_dbg(&dev->core, "%s:%d: regs %p\n", __func__, __LINE__, hcd->regs); 222 dev_dbg(&dev->core, "%s:%d: irq %u\n", __func__, __LINE__, hcd->irq); 223 224 tmp = hcd->irq; 225 226 usb_remove_hcd(hcd); 227 228 ps3_system_bus_set_drvdata(dev, NULL); 229 230 BUG_ON(!hcd->regs); 231 iounmap(hcd->regs); 232 233 release_mem_region(hcd->rsrc_start, hcd->rsrc_len); 234 usb_put_hcd(hcd); 235 236 ps3_io_irq_destroy(tmp); 237 ps3_free_mmio_region(dev->m_region); 238 239 ps3_dma_region_free(dev->d_region); 240 ps3_close_hv_device(dev); 241 242 return 0; 243 } 244 245 static int __init ps3_ehci_driver_register(struct ps3_system_bus_driver *drv) 246 { 247 return firmware_has_feature(FW_FEATURE_PS3_LV1) 248 ? ps3_system_bus_driver_register(drv) 249 : 0; 250 } 251 252 static void ps3_ehci_driver_unregister(struct ps3_system_bus_driver *drv) 253 { 254 if (firmware_has_feature(FW_FEATURE_PS3_LV1)) 255 ps3_system_bus_driver_unregister(drv); 256 } 257 258 MODULE_ALIAS(PS3_MODULE_ALIAS_EHCI); 259 260 static struct ps3_system_bus_driver ps3_ehci_driver = { 261 .core.name = "ps3-ehci-driver", 262 .core.owner = THIS_MODULE, 263 .match_id = PS3_MATCH_ID_EHCI, 264 .probe = ps3_ehci_probe, 265 .remove = ps3_ehci_remove, 266 .shutdown = ps3_ehci_remove, 267 }; 268