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 <linux/clk.h> 16 #include <plat/ehci-orion.h> 17 18 #define rdl(off) __raw_readl(hcd->regs + (off)) 19 #define wrl(off, val) __raw_writel((val), hcd->regs + (off)) 20 21 #define USB_CMD 0x140 22 #define USB_MODE 0x1a8 23 #define USB_CAUSE 0x310 24 #define USB_MASK 0x314 25 #define USB_WINDOW_CTRL(i) (0x320 + ((i) << 4)) 26 #define USB_WINDOW_BASE(i) (0x324 + ((i) << 4)) 27 #define USB_IPG 0x360 28 #define USB_PHY_PWR_CTRL 0x400 29 #define USB_PHY_TX_CTRL 0x420 30 #define USB_PHY_RX_CTRL 0x430 31 #define USB_PHY_IVREF_CTRL 0x440 32 #define USB_PHY_TST_GRP_CTRL 0x450 33 34 /* 35 * Implement Orion USB controller specification guidelines 36 */ 37 static void orion_usb_phy_v1_setup(struct usb_hcd *hcd) 38 { 39 /* The below GLs are according to the Orion Errata document */ 40 /* 41 * Clear interrupt cause and mask 42 */ 43 wrl(USB_CAUSE, 0); 44 wrl(USB_MASK, 0); 45 46 /* 47 * Reset controller 48 */ 49 wrl(USB_CMD, rdl(USB_CMD) | 0x2); 50 while (rdl(USB_CMD) & 0x2); 51 52 /* 53 * GL# USB-10: Set IPG for non start of frame packets 54 * Bits[14:8]=0xc 55 */ 56 wrl(USB_IPG, (rdl(USB_IPG) & ~0x7f00) | 0xc00); 57 58 /* 59 * GL# USB-9: USB 2.0 Power Control 60 * BG_VSEL[7:6]=0x1 61 */ 62 wrl(USB_PHY_PWR_CTRL, (rdl(USB_PHY_PWR_CTRL) & ~0xc0)| 0x40); 63 64 /* 65 * GL# USB-1: USB PHY Tx Control - force calibration to '8' 66 * TXDATA_BLOCK_EN[21]=0x1, EXT_RCAL_EN[13]=0x1, IMP_CAL[6:3]=0x8 67 */ 68 wrl(USB_PHY_TX_CTRL, (rdl(USB_PHY_TX_CTRL) & ~0x78) | 0x202040); 69 70 /* 71 * GL# USB-3 GL# USB-9: USB PHY Rx Control 72 * RXDATA_BLOCK_LENGHT[31:30]=0x3, EDGE_DET_SEL[27:26]=0, 73 * CDR_FASTLOCK_EN[21]=0, DISCON_THRESHOLD[9:8]=0, SQ_THRESH[7:4]=0x1 74 */ 75 wrl(USB_PHY_RX_CTRL, (rdl(USB_PHY_RX_CTRL) & ~0xc2003f0) | 0xc0000010); 76 77 /* 78 * GL# USB-3 GL# USB-9: USB PHY IVREF Control 79 * PLLVDD12[1:0]=0x2, RXVDD[5:4]=0x3, Reserved[19]=0 80 */ 81 wrl(USB_PHY_IVREF_CTRL, (rdl(USB_PHY_IVREF_CTRL) & ~0x80003 ) | 0x32); 82 83 /* 84 * GL# USB-3 GL# USB-9: USB PHY Test Group Control 85 * REG_FIFO_SQ_RST[15]=0 86 */ 87 wrl(USB_PHY_TST_GRP_CTRL, rdl(USB_PHY_TST_GRP_CTRL) & ~0x8000); 88 89 /* 90 * Stop and reset controller 91 */ 92 wrl(USB_CMD, rdl(USB_CMD) & ~0x1); 93 wrl(USB_CMD, rdl(USB_CMD) | 0x2); 94 while (rdl(USB_CMD) & 0x2); 95 96 /* 97 * GL# USB-5 Streaming disable REG_USB_MODE[4]=1 98 * TBD: This need to be done after each reset! 99 * GL# USB-4 Setup USB Host mode 100 */ 101 wrl(USB_MODE, 0x13); 102 } 103 104 static int ehci_orion_setup(struct usb_hcd *hcd) 105 { 106 struct ehci_hcd *ehci = hcd_to_ehci(hcd); 107 int retval; 108 109 retval = ehci_setup(hcd); 110 if (retval) 111 return retval; 112 113 ehci_port_power(ehci, 0); 114 115 return retval; 116 } 117 118 static const struct hc_driver ehci_orion_hc_driver = { 119 .description = hcd_name, 120 .product_desc = "Marvell Orion EHCI", 121 .hcd_priv_size = sizeof(struct ehci_hcd), 122 123 /* 124 * generic hardware linkage 125 */ 126 .irq = ehci_irq, 127 .flags = HCD_MEMORY | HCD_USB2, 128 129 /* 130 * basic lifecycle operations 131 */ 132 .reset = ehci_orion_setup, 133 .start = ehci_run, 134 .stop = ehci_stop, 135 .shutdown = ehci_shutdown, 136 137 /* 138 * managing i/o requests and associated device resources 139 */ 140 .urb_enqueue = ehci_urb_enqueue, 141 .urb_dequeue = ehci_urb_dequeue, 142 .endpoint_disable = ehci_endpoint_disable, 143 .endpoint_reset = ehci_endpoint_reset, 144 145 /* 146 * scheduling support 147 */ 148 .get_frame_number = ehci_get_frame, 149 150 /* 151 * root hub support 152 */ 153 .hub_status_data = ehci_hub_status_data, 154 .hub_control = ehci_hub_control, 155 .bus_suspend = ehci_bus_suspend, 156 .bus_resume = ehci_bus_resume, 157 .relinquish_port = ehci_relinquish_port, 158 .port_handed_over = ehci_port_handed_over, 159 160 .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete, 161 }; 162 163 static void __init 164 ehci_orion_conf_mbus_windows(struct usb_hcd *hcd, 165 const struct mbus_dram_target_info *dram) 166 { 167 int i; 168 169 for (i = 0; i < 4; i++) { 170 wrl(USB_WINDOW_CTRL(i), 0); 171 wrl(USB_WINDOW_BASE(i), 0); 172 } 173 174 for (i = 0; i < dram->num_cs; i++) { 175 const struct mbus_dram_window *cs = dram->cs + i; 176 177 wrl(USB_WINDOW_CTRL(i), ((cs->size - 1) & 0xffff0000) | 178 (cs->mbus_attr << 8) | 179 (dram->mbus_dram_target_id << 4) | 1); 180 wrl(USB_WINDOW_BASE(i), cs->base); 181 } 182 } 183 184 static int __devinit ehci_orion_drv_probe(struct platform_device *pdev) 185 { 186 struct orion_ehci_data *pd = pdev->dev.platform_data; 187 const struct mbus_dram_target_info *dram; 188 struct resource *res; 189 struct usb_hcd *hcd; 190 struct ehci_hcd *ehci; 191 struct clk *clk; 192 void __iomem *regs; 193 int irq, err; 194 195 if (usb_disabled()) 196 return -ENODEV; 197 198 pr_debug("Initializing Orion-SoC USB Host Controller\n"); 199 200 irq = platform_get_irq(pdev, 0); 201 if (irq <= 0) { 202 dev_err(&pdev->dev, 203 "Found HC with no IRQ. Check %s setup!\n", 204 dev_name(&pdev->dev)); 205 err = -ENODEV; 206 goto err1; 207 } 208 209 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 210 if (!res) { 211 dev_err(&pdev->dev, 212 "Found HC with no register addr. Check %s setup!\n", 213 dev_name(&pdev->dev)); 214 err = -ENODEV; 215 goto err1; 216 } 217 218 if (!request_mem_region(res->start, resource_size(res), 219 ehci_orion_hc_driver.description)) { 220 dev_dbg(&pdev->dev, "controller already in use\n"); 221 err = -EBUSY; 222 goto err1; 223 } 224 225 regs = ioremap(res->start, resource_size(res)); 226 if (regs == NULL) { 227 dev_dbg(&pdev->dev, "error mapping memory\n"); 228 err = -EFAULT; 229 goto err2; 230 } 231 232 /* Not all platforms can gate the clock, so it is not 233 an error if the clock does not exists. */ 234 clk = clk_get(&pdev->dev, NULL); 235 if (!IS_ERR(clk)) { 236 clk_prepare_enable(clk); 237 clk_put(clk); 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 hcd->has_tt = 1; 254 255 /* 256 * (Re-)program MBUS remapping windows if we are asked to. 257 */ 258 dram = mv_mbus_dram_info(); 259 if (dram) 260 ehci_orion_conf_mbus_windows(hcd, dram); 261 262 /* 263 * setup Orion USB controller. 264 */ 265 switch (pd->phy_version) { 266 case EHCI_PHY_NA: /* dont change USB phy settings */ 267 break; 268 case EHCI_PHY_ORION: 269 orion_usb_phy_v1_setup(hcd); 270 break; 271 case EHCI_PHY_DD: 272 case EHCI_PHY_KW: 273 default: 274 printk(KERN_WARNING "Orion ehci -USB phy version isn't supported.\n"); 275 } 276 277 err = usb_add_hcd(hcd, irq, IRQF_SHARED); 278 if (err) 279 goto err4; 280 281 return 0; 282 283 err4: 284 usb_put_hcd(hcd); 285 err3: 286 if (!IS_ERR(clk)) { 287 clk_disable_unprepare(clk); 288 clk_put(clk); 289 } 290 iounmap(regs); 291 err2: 292 release_mem_region(res->start, resource_size(res)); 293 err1: 294 dev_err(&pdev->dev, "init %s fail, %d\n", 295 dev_name(&pdev->dev), err); 296 297 return err; 298 } 299 300 static int __exit ehci_orion_drv_remove(struct platform_device *pdev) 301 { 302 struct usb_hcd *hcd = platform_get_drvdata(pdev); 303 struct clk *clk; 304 305 usb_remove_hcd(hcd); 306 iounmap(hcd->regs); 307 release_mem_region(hcd->rsrc_start, hcd->rsrc_len); 308 usb_put_hcd(hcd); 309 310 clk = clk_get(&pdev->dev, NULL); 311 if (!IS_ERR(clk)) { 312 clk_disable_unprepare(clk); 313 clk_put(clk); 314 } 315 return 0; 316 } 317 318 MODULE_ALIAS("platform:orion-ehci"); 319 320 static struct platform_driver ehci_orion_driver = { 321 .probe = ehci_orion_drv_probe, 322 .remove = __exit_p(ehci_orion_drv_remove), 323 .shutdown = usb_hcd_platform_shutdown, 324 .driver.name = "orion-ehci", 325 }; 326