Felipe Balbi | 54ab2b0 | 2009-10-14 11:44:14 +0300 | [diff] [blame] | 1 | /* |
Anand Gadiyar | 4792a15 | 2010-11-21 23:23:42 +0530 | [diff] [blame] | 2 | * ehci-omap.c - driver for USBHOST on OMAP3/4 processors |
Felipe Balbi | 54ab2b0 | 2009-10-14 11:44:14 +0300 | [diff] [blame] | 3 | * |
Anand Gadiyar | 4792a15 | 2010-11-21 23:23:42 +0530 | [diff] [blame] | 4 | * Bus Glue for the EHCI controllers in OMAP3/4 |
| 5 | * Tested on several OMAP3 boards, and OMAP4 Pandaboard |
Felipe Balbi | 54ab2b0 | 2009-10-14 11:44:14 +0300 | [diff] [blame] | 6 | * |
Keshava Munegowda | 1940316 | 2011-03-01 20:08:21 +0530 | [diff] [blame] | 7 | * Copyright (C) 2007-2011 Texas Instruments, Inc. |
Felipe Balbi | 54ab2b0 | 2009-10-14 11:44:14 +0300 | [diff] [blame] | 8 | * Author: Vikram Pandita <vikram.pandita@ti.com> |
Anand Gadiyar | 4792a15 | 2010-11-21 23:23:42 +0530 | [diff] [blame] | 9 | * Author: Anand Gadiyar <gadiyar@ti.com> |
Keshava Munegowda | 1940316 | 2011-03-01 20:08:21 +0530 | [diff] [blame] | 10 | * Author: Keshava Munegowda <keshava_mgowda@ti.com> |
Felipe Balbi | 54ab2b0 | 2009-10-14 11:44:14 +0300 | [diff] [blame] | 11 | * |
| 12 | * Copyright (C) 2009 Nokia Corporation |
| 13 | * Contact: Felipe Balbi <felipe.balbi@nokia.com> |
| 14 | * |
| 15 | * Based on "ehci-fsl.c" and "ehci-au1xxx.c" ehci glue layers |
| 16 | * |
| 17 | * This program is free software; you can redistribute it and/or modify |
| 18 | * it under the terms of the GNU General Public License as published by |
| 19 | * the Free Software Foundation; either version 2 of the License, or |
| 20 | * (at your option) any later version. |
| 21 | * |
| 22 | * This program is distributed in the hope that it will be useful, |
| 23 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 24 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 25 | * GNU General Public License for more details. |
| 26 | * |
| 27 | * You should have received a copy of the GNU General Public License |
| 28 | * along with this program; if not, write to the Free Software |
| 29 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 30 | * |
Keshava Munegowda | 1940316 | 2011-03-01 20:08:21 +0530 | [diff] [blame] | 31 | * TODO (last updated Feb 27, 2010): |
Felipe Balbi | 54ab2b0 | 2009-10-14 11:44:14 +0300 | [diff] [blame] | 32 | * - add kernel-doc |
| 33 | * - enable AUTOIDLE |
Felipe Balbi | 54ab2b0 | 2009-10-14 11:44:14 +0300 | [diff] [blame] | 34 | * - add suspend/resume |
Anand Gadiyar | 4792a15 | 2010-11-21 23:23:42 +0530 | [diff] [blame] | 35 | * - add HSIC and TLL support |
| 36 | * - convert to use hwmod and runtime PM |
Felipe Balbi | 54ab2b0 | 2009-10-14 11:44:14 +0300 | [diff] [blame] | 37 | */ |
| 38 | |
| 39 | #include <linux/platform_device.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 40 | #include <linux/slab.h> |
Ajay Kumar Gupta | 5aa4af2 | 2010-07-08 14:03:02 +0530 | [diff] [blame] | 41 | #include <linux/usb/ulpi.h> |
Thomas Weber | c76f782 | 2009-12-15 10:38:05 -0800 | [diff] [blame] | 42 | #include <plat/usb.h> |
Keshava Munegowda | 6e3d4be | 2011-04-21 19:52:43 +0530 | [diff] [blame] | 43 | #include <linux/regulator/consumer.h> |
Keshava Munegowda | 6c984b0 | 2011-10-11 13:22:11 +0530 | [diff] [blame] | 44 | #include <linux/pm_runtime.h> |
Keshava Munegowda | 1fcb57d | 2012-03-19 12:12:47 +0530 | [diff] [blame] | 45 | #include <linux/gpio.h> |
Anand Gadiyar | 354ab85 | 2012-06-05 15:34:27 +0300 | [diff] [blame^] | 46 | #include <linux/clk.h> |
Felipe Balbi | 54ab2b0 | 2009-10-14 11:44:14 +0300 | [diff] [blame] | 47 | |
Felipe Balbi | 54ab2b0 | 2009-10-14 11:44:14 +0300 | [diff] [blame] | 48 | /* EHCI Register Set */ |
Anand Gadiyar | 572538d | 2010-05-06 20:09:48 +0530 | [diff] [blame] | 49 | #define EHCI_INSNREG04 (0xA0) |
| 50 | #define EHCI_INSNREG04_DISABLE_UNSUSPEND (1 << 5) |
Felipe Balbi | 54ab2b0 | 2009-10-14 11:44:14 +0300 | [diff] [blame] | 51 | #define EHCI_INSNREG05_ULPI (0xA4) |
| 52 | #define EHCI_INSNREG05_ULPI_CONTROL_SHIFT 31 |
| 53 | #define EHCI_INSNREG05_ULPI_PORTSEL_SHIFT 24 |
| 54 | #define EHCI_INSNREG05_ULPI_OPSEL_SHIFT 22 |
| 55 | #define EHCI_INSNREG05_ULPI_REGADD_SHIFT 16 |
| 56 | #define EHCI_INSNREG05_ULPI_EXTREGADD_SHIFT 8 |
| 57 | #define EHCI_INSNREG05_ULPI_WRDATA_SHIFT 0 |
| 58 | |
Anand Gadiyar | 354ab85 | 2012-06-05 15:34:27 +0300 | [diff] [blame^] | 59 | /* Errata i693 */ |
| 60 | static struct clk *utmi_p1_fck; |
| 61 | static struct clk *utmi_p2_fck; |
| 62 | static struct clk *xclk60mhsp1_ck; |
| 63 | static struct clk *xclk60mhsp2_ck; |
| 64 | static struct clk *usbhost_p1_fck; |
| 65 | static struct clk *usbhost_p2_fck; |
| 66 | static struct clk *init_60m_fclk; |
| 67 | |
Felipe Balbi | 54ab2b0 | 2009-10-14 11:44:14 +0300 | [diff] [blame] | 68 | /*-------------------------------------------------------------------------*/ |
| 69 | |
Keshava Munegowda | 1940316 | 2011-03-01 20:08:21 +0530 | [diff] [blame] | 70 | static const struct hc_driver ehci_omap_hc_driver; |
| 71 | |
| 72 | |
| 73 | static inline void ehci_write(void __iomem *base, u32 reg, u32 val) |
Felipe Balbi | 54ab2b0 | 2009-10-14 11:44:14 +0300 | [diff] [blame] | 74 | { |
| 75 | __raw_writel(val, base + reg); |
| 76 | } |
| 77 | |
Keshava Munegowda | 1940316 | 2011-03-01 20:08:21 +0530 | [diff] [blame] | 78 | static inline u32 ehci_read(void __iomem *base, u32 reg) |
Felipe Balbi | 54ab2b0 | 2009-10-14 11:44:14 +0300 | [diff] [blame] | 79 | { |
| 80 | return __raw_readl(base + reg); |
| 81 | } |
| 82 | |
Anand Gadiyar | 354ab85 | 2012-06-05 15:34:27 +0300 | [diff] [blame^] | 83 | /* Erratum i693 workaround sequence */ |
| 84 | static void omap_ehci_erratum_i693(struct ehci_hcd *ehci) |
| 85 | { |
| 86 | int ret = 0; |
| 87 | |
| 88 | /* Switch to the internal 60 MHz clock */ |
| 89 | ret = clk_set_parent(utmi_p1_fck, init_60m_fclk); |
| 90 | if (ret != 0) |
| 91 | ehci_err(ehci, "init_60m_fclk set parent" |
| 92 | "failed error:%d\n", ret); |
| 93 | |
| 94 | ret = clk_set_parent(utmi_p2_fck, init_60m_fclk); |
| 95 | if (ret != 0) |
| 96 | ehci_err(ehci, "init_60m_fclk set parent" |
| 97 | "failed error:%d\n", ret); |
| 98 | |
| 99 | clk_enable(usbhost_p1_fck); |
| 100 | clk_enable(usbhost_p2_fck); |
| 101 | |
| 102 | /* Wait 1ms and switch back to the external clock */ |
| 103 | mdelay(1); |
| 104 | ret = clk_set_parent(utmi_p1_fck, xclk60mhsp1_ck); |
| 105 | if (ret != 0) |
| 106 | ehci_err(ehci, "xclk60mhsp1_ck set parent" |
| 107 | "failed error:%d\n", ret); |
| 108 | |
| 109 | ret = clk_set_parent(utmi_p2_fck, xclk60mhsp2_ck); |
| 110 | if (ret != 0) |
| 111 | ehci_err(ehci, "xclk60mhsp2_ck set parent" |
| 112 | "failed error:%d\n", ret); |
| 113 | |
| 114 | clk_disable(usbhost_p1_fck); |
| 115 | clk_disable(usbhost_p2_fck); |
| 116 | } |
| 117 | |
Keshava Munegowda | 1940316 | 2011-03-01 20:08:21 +0530 | [diff] [blame] | 118 | static void omap_ehci_soft_phy_reset(struct platform_device *pdev, u8 port) |
Felipe Balbi | 54ab2b0 | 2009-10-14 11:44:14 +0300 | [diff] [blame] | 119 | { |
Keshava Munegowda | 1940316 | 2011-03-01 20:08:21 +0530 | [diff] [blame] | 120 | struct usb_hcd *hcd = dev_get_drvdata(&pdev->dev); |
Ajay Kumar Gupta | 5aa4af2 | 2010-07-08 14:03:02 +0530 | [diff] [blame] | 121 | unsigned long timeout = jiffies + msecs_to_jiffies(1000); |
| 122 | unsigned reg = 0; |
| 123 | |
| 124 | reg = ULPI_FUNC_CTRL_RESET |
| 125 | /* FUNCTION_CTRL_SET register */ |
| 126 | | (ULPI_SET(ULPI_FUNC_CTRL) << EHCI_INSNREG05_ULPI_REGADD_SHIFT) |
| 127 | /* Write */ |
| 128 | | (2 << EHCI_INSNREG05_ULPI_OPSEL_SHIFT) |
| 129 | /* PORTn */ |
| 130 | | ((port + 1) << EHCI_INSNREG05_ULPI_PORTSEL_SHIFT) |
| 131 | /* start ULPI access*/ |
| 132 | | (1 << EHCI_INSNREG05_ULPI_CONTROL_SHIFT); |
| 133 | |
Keshava Munegowda | 1940316 | 2011-03-01 20:08:21 +0530 | [diff] [blame] | 134 | ehci_write(hcd->regs, EHCI_INSNREG05_ULPI, reg); |
Ajay Kumar Gupta | 5aa4af2 | 2010-07-08 14:03:02 +0530 | [diff] [blame] | 135 | |
| 136 | /* Wait for ULPI access completion */ |
Keshava Munegowda | 1940316 | 2011-03-01 20:08:21 +0530 | [diff] [blame] | 137 | while ((ehci_read(hcd->regs, EHCI_INSNREG05_ULPI) |
Ajay Kumar Gupta | 5aa4af2 | 2010-07-08 14:03:02 +0530 | [diff] [blame] | 138 | & (1 << EHCI_INSNREG05_ULPI_CONTROL_SHIFT))) { |
| 139 | cpu_relax(); |
| 140 | |
| 141 | if (time_after(jiffies, timeout)) { |
Keshava Munegowda | 1940316 | 2011-03-01 20:08:21 +0530 | [diff] [blame] | 142 | dev_dbg(&pdev->dev, "phy reset operation timed out\n"); |
Ajay Kumar Gupta | 5aa4af2 | 2010-07-08 14:03:02 +0530 | [diff] [blame] | 143 | break; |
| 144 | } |
| 145 | } |
| 146 | } |
| 147 | |
Anand Gadiyar | 354ab85 | 2012-06-05 15:34:27 +0300 | [diff] [blame^] | 148 | static int omap_ehci_hub_control( |
| 149 | struct usb_hcd *hcd, |
| 150 | u16 typeReq, |
| 151 | u16 wValue, |
| 152 | u16 wIndex, |
| 153 | char *buf, |
| 154 | u16 wLength |
| 155 | ) |
| 156 | { |
| 157 | struct ehci_hcd *ehci = hcd_to_ehci(hcd); |
| 158 | u32 __iomem *status_reg = &ehci->regs->port_status[ |
| 159 | (wIndex & 0xff) - 1]; |
| 160 | u32 temp; |
| 161 | unsigned long flags; |
| 162 | int retval = 0; |
| 163 | |
| 164 | spin_lock_irqsave(&ehci->lock, flags); |
| 165 | |
| 166 | if (typeReq == SetPortFeature && wValue == USB_PORT_FEAT_SUSPEND) { |
| 167 | temp = ehci_readl(ehci, status_reg); |
| 168 | if ((temp & PORT_PE) == 0 || (temp & PORT_RESET) != 0) { |
| 169 | retval = -EPIPE; |
| 170 | goto done; |
| 171 | } |
| 172 | |
| 173 | temp &= ~PORT_WKCONN_E; |
| 174 | temp |= PORT_WKDISC_E | PORT_WKOC_E; |
| 175 | ehci_writel(ehci, temp | PORT_SUSPEND, status_reg); |
| 176 | |
| 177 | omap_ehci_erratum_i693(ehci); |
| 178 | |
| 179 | set_bit((wIndex & 0xff) - 1, &ehci->suspended_ports); |
| 180 | goto done; |
| 181 | } |
| 182 | |
| 183 | spin_unlock_irqrestore(&ehci->lock, flags); |
| 184 | |
| 185 | /* Handle the hub control events here */ |
| 186 | return ehci_hub_control(hcd, typeReq, wValue, wIndex, buf, wLength); |
| 187 | done: |
| 188 | spin_unlock_irqrestore(&ehci->lock, flags); |
| 189 | return retval; |
| 190 | } |
| 191 | |
Ming Lei | d4aefec | 2011-07-28 22:59:53 +0800 | [diff] [blame] | 192 | static void disable_put_regulator( |
| 193 | struct ehci_hcd_omap_platform_data *pdata) |
| 194 | { |
| 195 | int i; |
| 196 | |
| 197 | for (i = 0 ; i < OMAP3_HS_USB_PORTS ; i++) { |
| 198 | if (pdata->regulator[i]) { |
| 199 | regulator_disable(pdata->regulator[i]); |
| 200 | regulator_put(pdata->regulator[i]); |
| 201 | } |
| 202 | } |
| 203 | } |
Felipe Balbi | 54ab2b0 | 2009-10-14 11:44:14 +0300 | [diff] [blame] | 204 | |
| 205 | /* configure so an HC device and id are always provided */ |
| 206 | /* always called with process context; sleeping is OK */ |
| 207 | |
| 208 | /** |
| 209 | * ehci_hcd_omap_probe - initialize TI-based HCDs |
| 210 | * |
| 211 | * Allocates basic resources for this USB host controller, and |
| 212 | * then invokes the start() method for the HCD associated with it |
| 213 | * through the hotplug entry's driver_data. |
| 214 | */ |
| 215 | static int ehci_hcd_omap_probe(struct platform_device *pdev) |
| 216 | { |
Keshava Munegowda | 1940316 | 2011-03-01 20:08:21 +0530 | [diff] [blame] | 217 | struct device *dev = &pdev->dev; |
| 218 | struct ehci_hcd_omap_platform_data *pdata = dev->platform_data; |
| 219 | struct resource *res; |
| 220 | struct usb_hcd *hcd; |
| 221 | void __iomem *regs; |
| 222 | struct ehci_hcd *omap_ehci; |
| 223 | int ret = -ENODEV; |
| 224 | int irq; |
Keshava Munegowda | 6e3d4be | 2011-04-21 19:52:43 +0530 | [diff] [blame] | 225 | int i; |
| 226 | char supply[7]; |
Felipe Balbi | 54ab2b0 | 2009-10-14 11:44:14 +0300 | [diff] [blame] | 227 | |
| 228 | if (usb_disabled()) |
Keshava Munegowda | 1940316 | 2011-03-01 20:08:21 +0530 | [diff] [blame] | 229 | return -ENODEV; |
Felipe Balbi | 54ab2b0 | 2009-10-14 11:44:14 +0300 | [diff] [blame] | 230 | |
Keshava Munegowda | 1940316 | 2011-03-01 20:08:21 +0530 | [diff] [blame] | 231 | if (!dev->parent) { |
| 232 | dev_err(dev, "Missing parent device\n"); |
| 233 | return -ENODEV; |
Felipe Balbi | 54ab2b0 | 2009-10-14 11:44:14 +0300 | [diff] [blame] | 234 | } |
| 235 | |
Keshava Munegowda | 1940316 | 2011-03-01 20:08:21 +0530 | [diff] [blame] | 236 | irq = platform_get_irq_byname(pdev, "ehci-irq"); |
| 237 | if (irq < 0) { |
| 238 | dev_err(dev, "EHCI irq failed\n"); |
| 239 | return -ENODEV; |
| 240 | } |
| 241 | |
| 242 | res = platform_get_resource_byname(pdev, |
| 243 | IORESOURCE_MEM, "ehci"); |
| 244 | if (!res) { |
| 245 | dev_err(dev, "UHH EHCI get resource failed\n"); |
| 246 | return -ENODEV; |
| 247 | } |
| 248 | |
| 249 | regs = ioremap(res->start, resource_size(res)); |
| 250 | if (!regs) { |
| 251 | dev_err(dev, "UHH EHCI ioremap failed\n"); |
| 252 | return -ENOMEM; |
| 253 | } |
| 254 | |
| 255 | hcd = usb_create_hcd(&ehci_omap_hc_driver, dev, |
| 256 | dev_name(dev)); |
Felipe Balbi | 54ab2b0 | 2009-10-14 11:44:14 +0300 | [diff] [blame] | 257 | if (!hcd) { |
Keshava Munegowda | 1940316 | 2011-03-01 20:08:21 +0530 | [diff] [blame] | 258 | dev_err(dev, "failed to create hcd with err %d\n", ret); |
Felipe Balbi | 54ab2b0 | 2009-10-14 11:44:14 +0300 | [diff] [blame] | 259 | ret = -ENOMEM; |
Keshava Munegowda | 1940316 | 2011-03-01 20:08:21 +0530 | [diff] [blame] | 260 | goto err_io; |
Felipe Balbi | 54ab2b0 | 2009-10-14 11:44:14 +0300 | [diff] [blame] | 261 | } |
| 262 | |
Felipe Balbi | 54ab2b0 | 2009-10-14 11:44:14 +0300 | [diff] [blame] | 263 | hcd->rsrc_start = res->start; |
| 264 | hcd->rsrc_len = resource_size(res); |
Keshava Munegowda | 1940316 | 2011-03-01 20:08:21 +0530 | [diff] [blame] | 265 | hcd->regs = regs; |
Felipe Balbi | 54ab2b0 | 2009-10-14 11:44:14 +0300 | [diff] [blame] | 266 | |
Keshava Munegowda | 6e3d4be | 2011-04-21 19:52:43 +0530 | [diff] [blame] | 267 | /* get ehci regulator and enable */ |
| 268 | for (i = 0 ; i < OMAP3_HS_USB_PORTS ; i++) { |
| 269 | if (pdata->port_mode[i] != OMAP_EHCI_PORT_MODE_PHY) { |
| 270 | pdata->regulator[i] = NULL; |
| 271 | continue; |
| 272 | } |
| 273 | snprintf(supply, sizeof(supply), "hsusb%d", i); |
| 274 | pdata->regulator[i] = regulator_get(dev, supply); |
| 275 | if (IS_ERR(pdata->regulator[i])) { |
| 276 | pdata->regulator[i] = NULL; |
| 277 | dev_dbg(dev, |
| 278 | "failed to get ehci port%d regulator\n", i); |
| 279 | } else { |
| 280 | regulator_enable(pdata->regulator[i]); |
| 281 | } |
| 282 | } |
| 283 | |
Keshava Munegowda | 1fcb57d | 2012-03-19 12:12:47 +0530 | [diff] [blame] | 284 | if (pdata->phy_reset) { |
| 285 | if (gpio_is_valid(pdata->reset_gpio_port[0])) |
| 286 | gpio_request_one(pdata->reset_gpio_port[0], |
| 287 | GPIOF_OUT_INIT_LOW, "USB1 PHY reset"); |
| 288 | |
| 289 | if (gpio_is_valid(pdata->reset_gpio_port[1])) |
| 290 | gpio_request_one(pdata->reset_gpio_port[1], |
| 291 | GPIOF_OUT_INIT_LOW, "USB2 PHY reset"); |
| 292 | |
| 293 | /* Hold the PHY in RESET for enough time till DIR is high */ |
| 294 | udelay(10); |
| 295 | } |
| 296 | |
Keshava Munegowda | 6c984b0 | 2011-10-11 13:22:11 +0530 | [diff] [blame] | 297 | pm_runtime_enable(dev); |
| 298 | pm_runtime_get_sync(dev); |
Felipe Balbi | 54ab2b0 | 2009-10-14 11:44:14 +0300 | [diff] [blame] | 299 | |
Keshava Munegowda | 1940316 | 2011-03-01 20:08:21 +0530 | [diff] [blame] | 300 | /* |
| 301 | * An undocumented "feature" in the OMAP3 EHCI controller, |
| 302 | * causes suspended ports to be taken out of suspend when |
| 303 | * the USBCMD.Run/Stop bit is cleared (for example when |
| 304 | * we do ehci_bus_suspend). |
| 305 | * This breaks suspend-resume if the root-hub is allowed |
| 306 | * to suspend. Writing 1 to this undocumented register bit |
| 307 | * disables this feature and restores normal behavior. |
| 308 | */ |
| 309 | ehci_write(regs, EHCI_INSNREG04, |
| 310 | EHCI_INSNREG04_DISABLE_UNSUSPEND); |
| 311 | |
| 312 | /* Soft reset the PHY using PHY reset command over ULPI */ |
| 313 | if (pdata->port_mode[0] == OMAP_EHCI_PORT_MODE_PHY) |
| 314 | omap_ehci_soft_phy_reset(pdev, 0); |
| 315 | if (pdata->port_mode[1] == OMAP_EHCI_PORT_MODE_PHY) |
| 316 | omap_ehci_soft_phy_reset(pdev, 1); |
| 317 | |
| 318 | omap_ehci = hcd_to_ehci(hcd); |
| 319 | omap_ehci->sbrn = 0x20; |
| 320 | |
Felipe Balbi | 54ab2b0 | 2009-10-14 11:44:14 +0300 | [diff] [blame] | 321 | /* we know this is the memory we want, no need to ioremap again */ |
Keshava Munegowda | 1940316 | 2011-03-01 20:08:21 +0530 | [diff] [blame] | 322 | omap_ehci->caps = hcd->regs; |
| 323 | omap_ehci->regs = hcd->regs |
Jan Andersson | c430131 | 2011-05-03 20:11:57 +0200 | [diff] [blame] | 324 | + HC_LENGTH(ehci, readl(&omap_ehci->caps->hc_capbase)); |
Felipe Balbi | 54ab2b0 | 2009-10-14 11:44:14 +0300 | [diff] [blame] | 325 | |
Keshava Munegowda | 1940316 | 2011-03-01 20:08:21 +0530 | [diff] [blame] | 326 | dbg_hcs_params(omap_ehci, "reset"); |
| 327 | dbg_hcc_params(omap_ehci, "reset"); |
Anand Gadiyar | bdb581b | 2010-02-12 17:54:59 +0530 | [diff] [blame] | 328 | |
Felipe Balbi | 54ab2b0 | 2009-10-14 11:44:14 +0300 | [diff] [blame] | 329 | /* cache this readonly data; minimize chip reads */ |
Keshava Munegowda | 1940316 | 2011-03-01 20:08:21 +0530 | [diff] [blame] | 330 | omap_ehci->hcs_params = readl(&omap_ehci->caps->hcs_params); |
Felipe Balbi | 54ab2b0 | 2009-10-14 11:44:14 +0300 | [diff] [blame] | 331 | |
Geoff Levand | 876e0df | 2011-11-22 18:04:45 -0800 | [diff] [blame] | 332 | ehci_reset(omap_ehci); |
| 333 | |
Keshava Munegowda | 1fcb57d | 2012-03-19 12:12:47 +0530 | [diff] [blame] | 334 | if (pdata->phy_reset) { |
| 335 | /* Hold the PHY in RESET for enough time till |
| 336 | * PHY is settled and ready |
| 337 | */ |
| 338 | udelay(10); |
| 339 | |
| 340 | if (gpio_is_valid(pdata->reset_gpio_port[0])) |
Igor Grinberg | 7b18389 | 2012-05-09 10:31:35 +0300 | [diff] [blame] | 341 | gpio_set_value_cansleep(pdata->reset_gpio_port[0], 1); |
Keshava Munegowda | 1fcb57d | 2012-03-19 12:12:47 +0530 | [diff] [blame] | 342 | |
| 343 | if (gpio_is_valid(pdata->reset_gpio_port[1])) |
Igor Grinberg | 7b18389 | 2012-05-09 10:31:35 +0300 | [diff] [blame] | 344 | gpio_set_value_cansleep(pdata->reset_gpio_port[1], 1); |
Keshava Munegowda | 1fcb57d | 2012-03-19 12:12:47 +0530 | [diff] [blame] | 345 | } |
| 346 | |
Russ Dill | 3aa2ae7 | 2012-05-04 04:24:47 -0700 | [diff] [blame] | 347 | ret = usb_add_hcd(hcd, irq, IRQF_SHARED); |
| 348 | if (ret) { |
| 349 | dev_err(dev, "failed to add hcd with err %d\n", ret); |
| 350 | goto err_add_hcd; |
| 351 | } |
| 352 | |
| 353 | /* root ports should always stay powered */ |
| 354 | ehci_port_power(omap_ehci, 1); |
| 355 | |
Anand Gadiyar | 354ab85 | 2012-06-05 15:34:27 +0300 | [diff] [blame^] | 356 | /* get clocks */ |
| 357 | utmi_p1_fck = clk_get(dev, "utmi_p1_gfclk"); |
| 358 | if (IS_ERR(utmi_p1_fck)) { |
| 359 | ret = PTR_ERR(utmi_p1_fck); |
| 360 | dev_err(dev, "utmi_p1_gfclk failed error:%d\n", ret); |
| 361 | goto err_add_hcd; |
| 362 | } |
| 363 | |
| 364 | xclk60mhsp1_ck = clk_get(dev, "xclk60mhsp1_ck"); |
| 365 | if (IS_ERR(xclk60mhsp1_ck)) { |
| 366 | ret = PTR_ERR(xclk60mhsp1_ck); |
| 367 | dev_err(dev, "xclk60mhsp1_ck failed error:%d\n", ret); |
| 368 | goto err_utmi_p1_fck; |
| 369 | } |
| 370 | |
| 371 | utmi_p2_fck = clk_get(dev, "utmi_p2_gfclk"); |
| 372 | if (IS_ERR(utmi_p2_fck)) { |
| 373 | ret = PTR_ERR(utmi_p2_fck); |
| 374 | dev_err(dev, "utmi_p2_gfclk failed error:%d\n", ret); |
| 375 | goto err_xclk60mhsp1_ck; |
| 376 | } |
| 377 | |
| 378 | xclk60mhsp2_ck = clk_get(dev, "xclk60mhsp2_ck"); |
| 379 | if (IS_ERR(xclk60mhsp2_ck)) { |
| 380 | ret = PTR_ERR(xclk60mhsp2_ck); |
| 381 | dev_err(dev, "xclk60mhsp2_ck failed error:%d\n", ret); |
| 382 | goto err_utmi_p2_fck; |
| 383 | } |
| 384 | |
| 385 | usbhost_p1_fck = clk_get(dev, "usb_host_hs_utmi_p1_clk"); |
| 386 | if (IS_ERR(usbhost_p1_fck)) { |
| 387 | ret = PTR_ERR(usbhost_p1_fck); |
| 388 | dev_err(dev, "usbhost_p1_fck failed error:%d\n", ret); |
| 389 | goto err_xclk60mhsp2_ck; |
| 390 | } |
| 391 | |
| 392 | usbhost_p2_fck = clk_get(dev, "usb_host_hs_utmi_p2_clk"); |
| 393 | if (IS_ERR(usbhost_p2_fck)) { |
| 394 | ret = PTR_ERR(usbhost_p2_fck); |
| 395 | dev_err(dev, "usbhost_p2_fck failed error:%d\n", ret); |
| 396 | goto err_usbhost_p1_fck; |
| 397 | } |
| 398 | |
| 399 | init_60m_fclk = clk_get(dev, "init_60m_fclk"); |
| 400 | if (IS_ERR(init_60m_fclk)) { |
| 401 | ret = PTR_ERR(init_60m_fclk); |
| 402 | dev_err(dev, "init_60m_fclk failed error:%d\n", ret); |
| 403 | goto err_usbhost_p2_fck; |
| 404 | } |
| 405 | |
Felipe Balbi | 54ab2b0 | 2009-10-14 11:44:14 +0300 | [diff] [blame] | 406 | return 0; |
| 407 | |
Anand Gadiyar | 354ab85 | 2012-06-05 15:34:27 +0300 | [diff] [blame^] | 408 | err_usbhost_p2_fck: |
| 409 | clk_put(usbhost_p2_fck); |
| 410 | |
| 411 | err_usbhost_p1_fck: |
| 412 | clk_put(usbhost_p1_fck); |
| 413 | |
| 414 | err_xclk60mhsp2_ck: |
| 415 | clk_put(xclk60mhsp2_ck); |
| 416 | |
| 417 | err_utmi_p2_fck: |
| 418 | clk_put(utmi_p2_fck); |
| 419 | |
| 420 | err_xclk60mhsp1_ck: |
| 421 | clk_put(xclk60mhsp1_ck); |
| 422 | |
| 423 | err_utmi_p1_fck: |
| 424 | clk_put(utmi_p1_fck); |
| 425 | |
Felipe Balbi | 54ab2b0 | 2009-10-14 11:44:14 +0300 | [diff] [blame] | 426 | err_add_hcd: |
Ming Lei | d4aefec | 2011-07-28 22:59:53 +0800 | [diff] [blame] | 427 | disable_put_regulator(pdata); |
Keshava Munegowda | 6c984b0 | 2011-10-11 13:22:11 +0530 | [diff] [blame] | 428 | pm_runtime_put_sync(dev); |
Felipe Balbi | 54ab2b0 | 2009-10-14 11:44:14 +0300 | [diff] [blame] | 429 | |
Keshava Munegowda | 1940316 | 2011-03-01 20:08:21 +0530 | [diff] [blame] | 430 | err_io: |
Ming Lei | d4aefec | 2011-07-28 22:59:53 +0800 | [diff] [blame] | 431 | iounmap(regs); |
Felipe Balbi | 54ab2b0 | 2009-10-14 11:44:14 +0300 | [diff] [blame] | 432 | return ret; |
| 433 | } |
| 434 | |
Felipe Balbi | 54ab2b0 | 2009-10-14 11:44:14 +0300 | [diff] [blame] | 435 | |
| 436 | /** |
| 437 | * ehci_hcd_omap_remove - shutdown processing for EHCI HCDs |
| 438 | * @pdev: USB Host Controller being removed |
| 439 | * |
| 440 | * Reverses the effect of usb_ehci_hcd_omap_probe(), first invoking |
| 441 | * the HCD's stop() method. It is always called from a thread |
| 442 | * context, normally "rmmod", "apmd", or something similar. |
| 443 | */ |
| 444 | static int ehci_hcd_omap_remove(struct platform_device *pdev) |
| 445 | { |
Keshava Munegowda | 1fcb57d | 2012-03-19 12:12:47 +0530 | [diff] [blame] | 446 | struct device *dev = &pdev->dev; |
| 447 | struct usb_hcd *hcd = dev_get_drvdata(dev); |
| 448 | struct ehci_hcd_omap_platform_data *pdata = dev->platform_data; |
Felipe Balbi | 54ab2b0 | 2009-10-14 11:44:14 +0300 | [diff] [blame] | 449 | |
| 450 | usb_remove_hcd(hcd); |
Ming Lei | d4aefec | 2011-07-28 22:59:53 +0800 | [diff] [blame] | 451 | disable_put_regulator(dev->platform_data); |
| 452 | iounmap(hcd->regs); |
Felipe Balbi | 54ab2b0 | 2009-10-14 11:44:14 +0300 | [diff] [blame] | 453 | usb_put_hcd(hcd); |
Anand Gadiyar | 354ab85 | 2012-06-05 15:34:27 +0300 | [diff] [blame^] | 454 | |
| 455 | clk_put(utmi_p1_fck); |
| 456 | clk_put(utmi_p2_fck); |
| 457 | clk_put(xclk60mhsp1_ck); |
| 458 | clk_put(xclk60mhsp2_ck); |
| 459 | clk_put(usbhost_p1_fck); |
| 460 | clk_put(usbhost_p2_fck); |
| 461 | clk_put(init_60m_fclk); |
| 462 | |
Keshava Munegowda | 6c984b0 | 2011-10-11 13:22:11 +0530 | [diff] [blame] | 463 | pm_runtime_put_sync(dev); |
| 464 | pm_runtime_disable(dev); |
| 465 | |
Keshava Munegowda | 1fcb57d | 2012-03-19 12:12:47 +0530 | [diff] [blame] | 466 | if (pdata->phy_reset) { |
| 467 | if (gpio_is_valid(pdata->reset_gpio_port[0])) |
| 468 | gpio_free(pdata->reset_gpio_port[0]); |
| 469 | |
| 470 | if (gpio_is_valid(pdata->reset_gpio_port[1])) |
| 471 | gpio_free(pdata->reset_gpio_port[1]); |
| 472 | } |
Felipe Balbi | 54ab2b0 | 2009-10-14 11:44:14 +0300 | [diff] [blame] | 473 | return 0; |
| 474 | } |
| 475 | |
| 476 | static void ehci_hcd_omap_shutdown(struct platform_device *pdev) |
| 477 | { |
Keshava Munegowda | 1940316 | 2011-03-01 20:08:21 +0530 | [diff] [blame] | 478 | struct usb_hcd *hcd = dev_get_drvdata(&pdev->dev); |
Felipe Balbi | 54ab2b0 | 2009-10-14 11:44:14 +0300 | [diff] [blame] | 479 | |
| 480 | if (hcd->driver->shutdown) |
| 481 | hcd->driver->shutdown(hcd); |
| 482 | } |
| 483 | |
| 484 | static struct platform_driver ehci_hcd_omap_driver = { |
| 485 | .probe = ehci_hcd_omap_probe, |
| 486 | .remove = ehci_hcd_omap_remove, |
| 487 | .shutdown = ehci_hcd_omap_shutdown, |
| 488 | /*.suspend = ehci_hcd_omap_suspend, */ |
| 489 | /*.resume = ehci_hcd_omap_resume, */ |
| 490 | .driver = { |
| 491 | .name = "ehci-omap", |
| 492 | } |
| 493 | }; |
| 494 | |
| 495 | /*-------------------------------------------------------------------------*/ |
| 496 | |
| 497 | static const struct hc_driver ehci_omap_hc_driver = { |
| 498 | .description = hcd_name, |
| 499 | .product_desc = "OMAP-EHCI Host Controller", |
| 500 | .hcd_priv_size = sizeof(struct ehci_hcd), |
| 501 | |
| 502 | /* |
| 503 | * generic hardware linkage |
| 504 | */ |
| 505 | .irq = ehci_irq, |
| 506 | .flags = HCD_MEMORY | HCD_USB2, |
| 507 | |
| 508 | /* |
| 509 | * basic lifecycle operations |
| 510 | */ |
| 511 | .reset = ehci_init, |
| 512 | .start = ehci_run, |
| 513 | .stop = ehci_stop, |
| 514 | .shutdown = ehci_shutdown, |
| 515 | |
| 516 | /* |
| 517 | * managing i/o requests and associated device resources |
| 518 | */ |
| 519 | .urb_enqueue = ehci_urb_enqueue, |
| 520 | .urb_dequeue = ehci_urb_dequeue, |
| 521 | .endpoint_disable = ehci_endpoint_disable, |
| 522 | .endpoint_reset = ehci_endpoint_reset, |
| 523 | |
| 524 | /* |
| 525 | * scheduling support |
| 526 | */ |
| 527 | .get_frame_number = ehci_get_frame, |
| 528 | |
| 529 | /* |
| 530 | * root hub support |
| 531 | */ |
| 532 | .hub_status_data = ehci_hub_status_data, |
Anand Gadiyar | 354ab85 | 2012-06-05 15:34:27 +0300 | [diff] [blame^] | 533 | .hub_control = omap_ehci_hub_control, |
Felipe Balbi | 54ab2b0 | 2009-10-14 11:44:14 +0300 | [diff] [blame] | 534 | .bus_suspend = ehci_bus_suspend, |
| 535 | .bus_resume = ehci_bus_resume, |
| 536 | |
| 537 | .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete, |
| 538 | }; |
| 539 | |
| 540 | MODULE_ALIAS("platform:omap-ehci"); |
| 541 | MODULE_AUTHOR("Texas Instruments, Inc."); |
| 542 | MODULE_AUTHOR("Felipe Balbi <felipe.balbi@nokia.com>"); |
| 543 | |