Daniel Mack | 7e8d5cd | 2009-10-28 01:14:59 +0100 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2008 Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix |
| 3 | * Copyright (c) 2009 Daniel Mack <daniel@caiaq.de> |
| 4 | * |
| 5 | * This program is free software; you can redistribute it and/or modify it |
| 6 | * under the terms of the GNU General Public License as published by the |
| 7 | * Free Software Foundation; either version 2 of the License, or (at your |
| 8 | * option) any later version. |
| 9 | * |
| 10 | * This program is distributed in the hope that it will be useful, but |
| 11 | * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY |
| 12 | * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| 13 | * for more details. |
| 14 | * |
| 15 | * You should have received a copy of the GNU General Public License |
| 16 | * along with this program; if not, write to the Free Software Foundation, |
| 17 | * Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| 18 | */ |
| 19 | |
| 20 | #include <linux/platform_device.h> |
| 21 | #include <linux/clk.h> |
| 22 | #include <linux/delay.h> |
| 23 | #include <linux/usb/otg.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 24 | #include <linux/slab.h> |
Daniel Mack | 7e8d5cd | 2009-10-28 01:14:59 +0100 | [diff] [blame] | 25 | |
| 26 | #include <mach/mxc_ehci.h> |
| 27 | |
| 28 | #define ULPI_VIEWPORT_OFFSET 0x170 |
Daniel Mack | 7e8d5cd | 2009-10-28 01:14:59 +0100 | [diff] [blame] | 29 | |
| 30 | struct ehci_mxc_priv { |
| 31 | struct clk *usbclk, *ahbclk; |
| 32 | struct usb_hcd *hcd; |
| 33 | }; |
| 34 | |
| 35 | /* called during probe() after chip reset completes */ |
| 36 | static int ehci_mxc_setup(struct usb_hcd *hcd) |
| 37 | { |
| 38 | struct ehci_hcd *ehci = hcd_to_ehci(hcd); |
Uwe Kleine-König | 724c852 | 2010-11-02 10:30:57 +0100 | [diff] [blame^] | 39 | struct device *dev = hcd->self.controller; |
| 40 | struct mxc_usbh_platform_data *pdata = dev_get_platdata(dev); |
Daniel Mack | 7e8d5cd | 2009-10-28 01:14:59 +0100 | [diff] [blame] | 41 | int retval; |
| 42 | |
| 43 | /* EHCI registers start at offset 0x100 */ |
| 44 | ehci->caps = hcd->regs + 0x100; |
| 45 | ehci->regs = hcd->regs + 0x100 + |
| 46 | HC_LENGTH(ehci_readl(ehci, &ehci->caps->hc_capbase)); |
| 47 | dbg_hcs_params(ehci, "reset"); |
| 48 | dbg_hcc_params(ehci, "reset"); |
| 49 | |
| 50 | /* cache this readonly data; minimize chip reads */ |
| 51 | ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params); |
| 52 | |
Matthieu CASTET | 65fd427 | 2010-09-06 18:26:56 +0200 | [diff] [blame] | 53 | hcd->has_tt = 1; |
| 54 | |
Daniel Mack | 7e8d5cd | 2009-10-28 01:14:59 +0100 | [diff] [blame] | 55 | retval = ehci_halt(ehci); |
| 56 | if (retval) |
| 57 | return retval; |
| 58 | |
| 59 | /* data structure init */ |
| 60 | retval = ehci_init(hcd); |
| 61 | if (retval) |
| 62 | return retval; |
| 63 | |
Daniel Mack | 7e8d5cd | 2009-10-28 01:14:59 +0100 | [diff] [blame] | 64 | ehci->sbrn = 0x20; |
| 65 | |
| 66 | ehci_reset(ehci); |
| 67 | |
Uwe Kleine-König | 724c852 | 2010-11-02 10:30:57 +0100 | [diff] [blame^] | 68 | /* set up the PORTSCx register */ |
| 69 | ehci_writel(ehci, pdata->portsc, &ehci->regs->port_status[0]); |
| 70 | |
| 71 | /* is this really needed? */ |
| 72 | msleep(10); |
| 73 | |
Daniel Mack | 7e8d5cd | 2009-10-28 01:14:59 +0100 | [diff] [blame] | 74 | ehci_port_power(ehci, 0); |
| 75 | return 0; |
| 76 | } |
| 77 | |
| 78 | static const struct hc_driver ehci_mxc_hc_driver = { |
| 79 | .description = hcd_name, |
| 80 | .product_desc = "Freescale On-Chip EHCI Host Controller", |
| 81 | .hcd_priv_size = sizeof(struct ehci_hcd), |
| 82 | |
| 83 | /* |
| 84 | * generic hardware linkage |
| 85 | */ |
| 86 | .irq = ehci_irq, |
| 87 | .flags = HCD_USB2 | HCD_MEMORY, |
| 88 | |
| 89 | /* |
| 90 | * basic lifecycle operations |
| 91 | */ |
| 92 | .reset = ehci_mxc_setup, |
| 93 | .start = ehci_run, |
| 94 | .stop = ehci_stop, |
| 95 | .shutdown = ehci_shutdown, |
| 96 | |
| 97 | /* |
| 98 | * managing i/o requests and associated device resources |
| 99 | */ |
| 100 | .urb_enqueue = ehci_urb_enqueue, |
| 101 | .urb_dequeue = ehci_urb_dequeue, |
| 102 | .endpoint_disable = ehci_endpoint_disable, |
| 103 | |
| 104 | /* |
| 105 | * scheduling support |
| 106 | */ |
| 107 | .get_frame_number = ehci_get_frame, |
| 108 | |
| 109 | /* |
| 110 | * root hub support |
| 111 | */ |
| 112 | .hub_status_data = ehci_hub_status_data, |
| 113 | .hub_control = ehci_hub_control, |
| 114 | .bus_suspend = ehci_bus_suspend, |
| 115 | .bus_resume = ehci_bus_resume, |
| 116 | .relinquish_port = ehci_relinquish_port, |
| 117 | .port_handed_over = ehci_port_handed_over, |
| 118 | }; |
| 119 | |
| 120 | static int ehci_mxc_drv_probe(struct platform_device *pdev) |
| 121 | { |
| 122 | struct mxc_usbh_platform_data *pdata = pdev->dev.platform_data; |
| 123 | struct usb_hcd *hcd; |
| 124 | struct resource *res; |
Uwe Kleine-König | 724c852 | 2010-11-02 10:30:57 +0100 | [diff] [blame^] | 125 | int irq, ret; |
Daniel Mack | 7e8d5cd | 2009-10-28 01:14:59 +0100 | [diff] [blame] | 126 | struct ehci_mxc_priv *priv; |
| 127 | struct device *dev = &pdev->dev; |
| 128 | |
| 129 | dev_info(&pdev->dev, "initializing i.MX USB Controller\n"); |
| 130 | |
| 131 | if (!pdata) { |
| 132 | dev_err(dev, "No platform data given, bailing out.\n"); |
| 133 | return -EINVAL; |
| 134 | } |
| 135 | |
| 136 | irq = platform_get_irq(pdev, 0); |
| 137 | |
| 138 | hcd = usb_create_hcd(&ehci_mxc_hc_driver, dev, dev_name(dev)); |
| 139 | if (!hcd) |
| 140 | return -ENOMEM; |
| 141 | |
| 142 | priv = kzalloc(sizeof(*priv), GFP_KERNEL); |
| 143 | if (!priv) { |
| 144 | ret = -ENOMEM; |
| 145 | goto err_alloc; |
| 146 | } |
| 147 | |
| 148 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
| 149 | if (!res) { |
| 150 | dev_err(dev, "Found HC with no register addr. Check setup!\n"); |
| 151 | ret = -ENODEV; |
| 152 | goto err_get_resource; |
| 153 | } |
| 154 | |
| 155 | hcd->rsrc_start = res->start; |
| 156 | hcd->rsrc_len = resource_size(res); |
| 157 | |
| 158 | if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) { |
| 159 | dev_dbg(dev, "controller already in use\n"); |
| 160 | ret = -EBUSY; |
| 161 | goto err_request_mem; |
| 162 | } |
| 163 | |
| 164 | hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len); |
| 165 | if (!hcd->regs) { |
| 166 | dev_err(dev, "error mapping memory\n"); |
| 167 | ret = -EFAULT; |
| 168 | goto err_ioremap; |
| 169 | } |
| 170 | |
Valentin Longchamp | 2f0e40a | 2010-01-20 19:43:23 +0100 | [diff] [blame] | 171 | /* call platform specific init function */ |
| 172 | if (pdata->init) { |
| 173 | ret = pdata->init(pdev); |
| 174 | if (ret) { |
| 175 | dev_err(dev, "platform init failed\n"); |
| 176 | goto err_init; |
| 177 | } |
| 178 | /* platforms need some time to settle changed IO settings */ |
| 179 | mdelay(10); |
| 180 | } |
| 181 | |
Daniel Mack | 7e8d5cd | 2009-10-28 01:14:59 +0100 | [diff] [blame] | 182 | /* enable clocks */ |
| 183 | priv->usbclk = clk_get(dev, "usb"); |
| 184 | if (IS_ERR(priv->usbclk)) { |
| 185 | ret = PTR_ERR(priv->usbclk); |
| 186 | goto err_clk; |
| 187 | } |
| 188 | clk_enable(priv->usbclk); |
| 189 | |
Eric Bénard | 4ea0af0 | 2010-06-08 11:02:58 +0200 | [diff] [blame] | 190 | if (!cpu_is_mx35() && !cpu_is_mx25()) { |
Daniel Mack | 7e8d5cd | 2009-10-28 01:14:59 +0100 | [diff] [blame] | 191 | priv->ahbclk = clk_get(dev, "usb_ahb"); |
| 192 | if (IS_ERR(priv->ahbclk)) { |
| 193 | ret = PTR_ERR(priv->ahbclk); |
| 194 | goto err_clk_ahb; |
| 195 | } |
| 196 | clk_enable(priv->ahbclk); |
| 197 | } |
| 198 | |
Dinh Nguyen | 5a25ad8 | 2010-04-30 15:48:26 -0500 | [diff] [blame] | 199 | /* setup specific usb hw */ |
| 200 | ret = mxc_initialize_usb_hw(pdev->id, pdata->flags); |
Daniel Mack | 7e8d5cd | 2009-10-28 01:14:59 +0100 | [diff] [blame] | 201 | if (ret < 0) |
| 202 | goto err_init; |
| 203 | |
Daniel Mack | 7e8d5cd | 2009-10-28 01:14:59 +0100 | [diff] [blame] | 204 | /* Initialize the transceiver */ |
| 205 | if (pdata->otg) { |
| 206 | pdata->otg->io_priv = hcd->regs + ULPI_VIEWPORT_OFFSET; |
Wolfram Sang | 4c9715d | 2010-06-15 12:34:23 +0200 | [diff] [blame] | 207 | ret = otg_init(pdata->otg); |
| 208 | if (ret) { |
| 209 | dev_err(dev, "unable to init transceiver, probably missing\n"); |
| 210 | ret = -ENODEV; |
| 211 | goto err_add; |
| 212 | } |
| 213 | ret = otg_set_vbus(pdata->otg, 1); |
| 214 | if (ret) { |
Daniel Mack | 7e8d5cd | 2009-10-28 01:14:59 +0100 | [diff] [blame] | 215 | dev_err(dev, "unable to enable vbus on transceiver\n"); |
Wolfram Sang | 4c9715d | 2010-06-15 12:34:23 +0200 | [diff] [blame] | 216 | goto err_add; |
| 217 | } |
Daniel Mack | 7e8d5cd | 2009-10-28 01:14:59 +0100 | [diff] [blame] | 218 | } |
| 219 | |
| 220 | priv->hcd = hcd; |
| 221 | platform_set_drvdata(pdev, priv); |
| 222 | |
| 223 | ret = usb_add_hcd(hcd, irq, IRQF_DISABLED | IRQF_SHARED); |
| 224 | if (ret) |
| 225 | goto err_add; |
| 226 | |
| 227 | return 0; |
| 228 | |
| 229 | err_add: |
| 230 | if (pdata && pdata->exit) |
| 231 | pdata->exit(pdev); |
| 232 | err_init: |
| 233 | if (priv->ahbclk) { |
| 234 | clk_disable(priv->ahbclk); |
| 235 | clk_put(priv->ahbclk); |
| 236 | } |
| 237 | err_clk_ahb: |
| 238 | clk_disable(priv->usbclk); |
| 239 | clk_put(priv->usbclk); |
| 240 | err_clk: |
| 241 | iounmap(hcd->regs); |
| 242 | err_ioremap: |
| 243 | release_mem_region(hcd->rsrc_start, hcd->rsrc_len); |
| 244 | err_request_mem: |
| 245 | err_get_resource: |
| 246 | kfree(priv); |
| 247 | err_alloc: |
| 248 | usb_put_hcd(hcd); |
| 249 | return ret; |
| 250 | } |
| 251 | |
| 252 | static int __exit ehci_mxc_drv_remove(struct platform_device *pdev) |
| 253 | { |
| 254 | struct mxc_usbh_platform_data *pdata = pdev->dev.platform_data; |
| 255 | struct ehci_mxc_priv *priv = platform_get_drvdata(pdev); |
| 256 | struct usb_hcd *hcd = priv->hcd; |
| 257 | |
| 258 | if (pdata && pdata->exit) |
| 259 | pdata->exit(pdev); |
| 260 | |
| 261 | if (pdata->otg) |
| 262 | otg_shutdown(pdata->otg); |
| 263 | |
| 264 | usb_remove_hcd(hcd); |
| 265 | iounmap(hcd->regs); |
| 266 | release_mem_region(hcd->rsrc_start, hcd->rsrc_len); |
| 267 | usb_put_hcd(hcd); |
| 268 | platform_set_drvdata(pdev, NULL); |
| 269 | |
| 270 | clk_disable(priv->usbclk); |
| 271 | clk_put(priv->usbclk); |
| 272 | if (priv->ahbclk) { |
| 273 | clk_disable(priv->ahbclk); |
| 274 | clk_put(priv->ahbclk); |
| 275 | } |
| 276 | |
| 277 | kfree(priv); |
| 278 | |
| 279 | return 0; |
| 280 | } |
| 281 | |
| 282 | static void ehci_mxc_drv_shutdown(struct platform_device *pdev) |
| 283 | { |
| 284 | struct ehci_mxc_priv *priv = platform_get_drvdata(pdev); |
| 285 | struct usb_hcd *hcd = priv->hcd; |
| 286 | |
| 287 | if (hcd->driver->shutdown) |
| 288 | hcd->driver->shutdown(hcd); |
| 289 | } |
| 290 | |
| 291 | MODULE_ALIAS("platform:mxc-ehci"); |
| 292 | |
| 293 | static struct platform_driver ehci_mxc_driver = { |
| 294 | .probe = ehci_mxc_drv_probe, |
| 295 | .remove = __exit_p(ehci_mxc_drv_remove), |
| 296 | .shutdown = ehci_mxc_drv_shutdown, |
| 297 | .driver = { |
| 298 | .name = "mxc-ehci", |
| 299 | }, |
| 300 | }; |