1 /* 2 * drivers/usb/host/ehci-orion.c 3 * 4 * Tzachi Perelstein <tzachi@marvell.com> 5 * 6 * This file is licensed under the terms of the GNU General Public 7 * License version 2. This program is licensed "as is" without any 8 * warranty of any kind, whether express or implied. 9 */ 10 11 #include <linux/kernel.h> 12 #include <linux/module.h> 13 #include <linux/platform_device.h> 14 #include <linux/mbus.h> 15 #include <plat/ehci-orion.h> 16 17 #define rdl(off) __raw_readl(hcd->regs + (off)) 18 #define wrl(off, val) __raw_writel((val), hcd->regs + (off)) 19 20 #define USB_CMD 0x140 21 #define USB_MODE 0x1a8 22 #define USB_CAUSE 0x310 23 #define USB_MASK 0x314 24 #define USB_WINDOW_CTRL(i) (0x320 + ((i) << 4)) 25 #define USB_WINDOW_BASE(i) (0x324 + ((i) << 4)) 26 #define USB_IPG 0x360 27 #define USB_PHY_PWR_CTRL 0x400 28 #define USB_PHY_TX_CTRL 0x420 29 #define USB_PHY_RX_CTRL 0x430 30 #define USB_PHY_IVREF_CTRL 0x440 31 #define USB_PHY_TST_GRP_CTRL 0x450 32 33 /* 34 * Implement Orion USB controller specification guidelines 35 */ 36 static void orion_usb_phy_v1_setup(struct usb_hcd *hcd) 37 { 38 /* The below GLs are according to the Orion Errata document */ 39 /* 40 * Clear interrupt cause and mask 41 */ 42 wrl(USB_CAUSE, 0); 43 wrl(USB_MASK, 0); 44 45 /* 46 * Reset controller 47 */ 48 wrl(USB_CMD, rdl(USB_CMD) | 0x2); 49 while (rdl(USB_CMD) & 0x2); 50 51 /* 52 * GL# USB-10: Set IPG for non start of frame packets 53 * Bits[14:8]=0xc 54 */ 55 wrl(USB_IPG, (rdl(USB_IPG) & ~0x7f00) | 0xc00); 56 57 /* 58 * GL# USB-9: USB 2.0 Power Control 59 * BG_VSEL[7:6]=0x1 60 */ 61 wrl(USB_PHY_PWR_CTRL, (rdl(USB_PHY_PWR_CTRL) & ~0xc0)| 0x40); 62 63 /* 64 * GL# USB-1: USB PHY Tx Control - force calibration to '8' 65 * TXDATA_BLOCK_EN[21]=0x1, EXT_RCAL_EN[13]=0x1, IMP_CAL[6:3]=0x8 66 */ 67 wrl(USB_PHY_TX_CTRL, (rdl(USB_PHY_TX_CTRL) & ~0x78) | 0x202040); 68 69 /* 70 * GL# USB-3 GL# USB-9: USB PHY Rx Control 71 * RXDATA_BLOCK_LENGHT[31:30]=0x3, EDGE_DET_SEL[27:26]=0, 72 * CDR_FASTLOCK_EN[21]=0, DISCON_THRESHOLD[9:8]=0, SQ_THRESH[7:4]=0x1 73 */ 74 wrl(USB_PHY_RX_CTRL, (rdl(USB_PHY_RX_CTRL) & ~0xc2003f0) | 0xc0000010); 75 76 /* 77 * GL# USB-3 GL# USB-9: USB PHY IVREF Control 78 * PLLVDD12[1:0]=0x2, RXVDD[5:4]=0x3, Reserved[19]=0 79 */ 80 wrl(USB_PHY_IVREF_CTRL, (rdl(USB_PHY_IVREF_CTRL) & ~0x80003 ) | 0x32); 81 82 /* 83 * GL# USB-3 GL# USB-9: USB PHY Test Group Control 84 * REG_FIFO_SQ_RST[15]=0 85 */ 86 wrl(USB_PHY_TST_GRP_CTRL, rdl(USB_PHY_TST_GRP_CTRL) & ~0x8000); 87 88 /* 89 * Stop and reset controller 90 */ 91 wrl(USB_CMD, rdl(USB_CMD) & ~0x1); 92 wrl(USB_CMD, rdl(USB_CMD) | 0x2); 93 while (rdl(USB_CMD) & 0x2); 94 95 /* 96 * GL# USB-5 Streaming disable REG_USB_MODE[4]=1 97 * TBD: This need to be done after each reset! 98 * GL# USB-4 Setup USB Host mode 99 */ 100 wrl(USB_MODE, 0x13); 101 } 102 103 static int ehci_orion_setup(struct usb_hcd *hcd) 104 { 105 struct ehci_hcd *ehci = hcd_to_ehci(hcd); 106 int retval; 107 108 hcd->has_tt = 1; 109 110 retval = ehci_halt(ehci); 111 if (retval) 112 return retval; 113 114 /* 115 * data structure init 116 */ 117 retval = ehci_init(hcd); 118 if (retval) 119 return retval; 120 121 ehci_reset(ehci); 122 123 ehci_port_power(ehci, 0); 124 125 return retval; 126 } 127 128 static const struct hc_driver ehci_orion_hc_driver = { 129 .description = hcd_name, 130 .product_desc = "Marvell Orion EHCI", 131 .hcd_priv_size = sizeof(struct ehci_hcd), 132 133 /* 134 * generic hardware linkage 135 */ 136 .irq = ehci_irq, 137 .flags = HCD_MEMORY | HCD_USB2, 138 139 /* 140 * basic lifecycle operations 141 */ 142 .reset = ehci_orion_setup, 143 .start = ehci_run, 144 .stop = ehci_stop, 145 .shutdown = ehci_shutdown, 146 147 /* 148 * managing i/o requests and associated device resources 149 */ 150 .urb_enqueue = ehci_urb_enqueue, 151 .urb_dequeue = ehci_urb_dequeue, 152 .endpoint_disable = ehci_endpoint_disable, 153 .endpoint_reset = ehci_endpoint_reset, 154 155 /* 156 * scheduling support 157 */ 158 .get_frame_number = ehci_get_frame, 159 160 /* 161 * root hub support 162 */ 163 .hub_status_data = ehci_hub_status_data, 164 .hub_control = ehci_hub_control, 165 .bus_suspend = ehci_bus_suspend, 166 .bus_resume = ehci_bus_resume, 167 .relinquish_port = ehci_relinquish_port, 168 .port_handed_over = ehci_port_handed_over, 169 170 .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete, 171 }; 172 173 static void __init 174 ehci_orion_conf_mbus_windows(struct usb_hcd *hcd, 175 struct mbus_dram_target_info *dram) 176 { 177 int i; 178 179 for (i = 0; i < 4; i++) { 180 wrl(USB_WINDOW_CTRL(i), 0); 181 wrl(USB_WINDOW_BASE(i), 0); 182 } 183 184 for (i = 0; i < dram->num_cs; i++) { 185 struct mbus_dram_window *cs = dram->cs + i; 186 187 wrl(USB_WINDOW_CTRL(i), ((cs->size - 1) & 0xffff0000) | 188 (cs->mbus_attr << 8) | 189 (dram->mbus_dram_target_id << 4) | 1); 190 wrl(USB_WINDOW_BASE(i), cs->base); 191 } 192 } 193 194 static int __devinit ehci_orion_drv_probe(struct platform_device *pdev) 195 { 196 struct orion_ehci_data *pd = pdev->dev.platform_data; 197 struct resource *res; 198 struct usb_hcd *hcd; 199 struct ehci_hcd *ehci; 200 void __iomem *regs; 201 int irq, err; 202 203 if (usb_disabled()) 204 return -ENODEV; 205 206 pr_debug("Initializing Orion-SoC USB Host Controller\n"); 207 208 irq = platform_get_irq(pdev, 0); 209 if (irq <= 0) { 210 dev_err(&pdev->dev, 211 "Found HC with no IRQ. Check %s setup!\n", 212 dev_name(&pdev->dev)); 213 err = -ENODEV; 214 goto err1; 215 } 216 217 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 218 if (!res) { 219 dev_err(&pdev->dev, 220 "Found HC with no register addr. Check %s setup!\n", 221 dev_name(&pdev->dev)); 222 err = -ENODEV; 223 goto err1; 224 } 225 226 if (!request_mem_region(res->start, resource_size(res), 227 ehci_orion_hc_driver.description)) { 228 dev_dbg(&pdev->dev, "controller already in use\n"); 229 err = -EBUSY; 230 goto err1; 231 } 232 233 regs = ioremap(res->start, resource_size(res)); 234 if (regs == NULL) { 235 dev_dbg(&pdev->dev, "error mapping memory\n"); 236 err = -EFAULT; 237 goto err2; 238 } 239 240 hcd = usb_create_hcd(&ehci_orion_hc_driver, 241 &pdev->dev, dev_name(&pdev->dev)); 242 if (!hcd) { 243 err = -ENOMEM; 244 goto err3; 245 } 246 247 hcd->rsrc_start = res->start; 248 hcd->rsrc_len = resource_size(res); 249 hcd->regs = regs; 250 251 ehci = hcd_to_ehci(hcd); 252 ehci->caps = hcd->regs + 0x100; 253 ehci->regs = hcd->regs + 0x100 + 254 HC_LENGTH(ehci, ehci_readl(ehci, &ehci->caps->hc_capbase)); 255 ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params); 256 hcd->has_tt = 1; 257 ehci->sbrn = 0x20; 258 259 /* 260 * (Re-)program MBUS remapping windows if we are asked to. 261 */ 262 if (pd != NULL && pd->dram != NULL) 263 ehci_orion_conf_mbus_windows(hcd, pd->dram); 264 265 /* 266 * setup Orion USB controller. 267 */ 268 switch (pd->phy_version) { 269 case EHCI_PHY_NA: /* dont change USB phy settings */ 270 break; 271 case EHCI_PHY_ORION: 272 orion_usb_phy_v1_setup(hcd); 273 break; 274 case EHCI_PHY_DD: 275 case EHCI_PHY_KW: 276 default: 277 printk(KERN_WARNING "Orion ehci -USB phy version isn't supported.\n"); 278 } 279 280 err = usb_add_hcd(hcd, irq, IRQF_SHARED | IRQF_DISABLED); 281 if (err) 282 goto err4; 283 284 return 0; 285 286 err4: 287 usb_put_hcd(hcd); 288 err3: 289 iounmap(regs); 290 err2: 291 release_mem_region(res->start, resource_size(res)); 292 err1: 293 dev_err(&pdev->dev, "init %s fail, %d\n", 294 dev_name(&pdev->dev), err); 295 296 return err; 297 } 298 299 static int __exit ehci_orion_drv_remove(struct platform_device *pdev) 300 { 301 struct usb_hcd *hcd = platform_get_drvdata(pdev); 302 303 usb_remove_hcd(hcd); 304 iounmap(hcd->regs); 305 release_mem_region(hcd->rsrc_start, hcd->rsrc_len); 306 usb_put_hcd(hcd); 307 308 return 0; 309 } 310 311 MODULE_ALIAS("platform:orion-ehci"); 312 313 static struct platform_driver ehci_orion_driver = { 314 .probe = ehci_orion_drv_probe, 315 .remove = __exit_p(ehci_orion_drv_remove), 316 .shutdown = usb_hcd_platform_shutdown, 317 .driver.name = "orion-ehci", 318 }; 319