Andrew Victor | 39a269c | 2006-01-22 10:32:13 -0800 | [diff] [blame] | 1 | /* |
| 2 | * OHCI HCD (Host Controller Driver) for USB. |
| 3 | * |
| 4 | * Copyright (C) 2004 SAN People (Pty) Ltd. |
| 5 | * Copyright (C) 2005 Thibaut VARENE <varenet@parisc-linux.org> |
| 6 | * |
David Brownell | 0365ee0 | 2006-06-19 14:27:20 -0700 | [diff] [blame] | 7 | * AT91 Bus Glue |
Andrew Victor | 39a269c | 2006-01-22 10:32:13 -0800 | [diff] [blame] | 8 | * |
| 9 | * Based on fragments of 2.4 driver by Rick Bronson. |
| 10 | * Based on ohci-omap.c |
| 11 | * |
| 12 | * This file is licenced under the GPL. |
| 13 | */ |
| 14 | |
| 15 | #include <linux/clk.h> |
Manjunath Goudar | e3825b4 | 2013-09-21 16:38:42 +0530 | [diff] [blame] | 16 | #include <linux/dma-mapping.h> |
Jean-Christophe PLAGNIOL-VILLARD | 2419730 | 2011-11-21 06:55:18 +0800 | [diff] [blame] | 17 | #include <linux/of_platform.h> |
| 18 | #include <linux/of_gpio.h> |
Manjunath Goudar | e3825b4 | 2013-09-21 16:38:42 +0530 | [diff] [blame] | 19 | #include <linux/platform_device.h> |
Jean-Christophe PLAGNIOL-VILLARD | bcd2360 | 2012-10-30 05:12:23 +0800 | [diff] [blame] | 20 | #include <linux/platform_data/atmel.h> |
Manjunath Goudar | e3825b4 | 2013-09-21 16:38:42 +0530 | [diff] [blame] | 21 | #include <linux/io.h> |
| 22 | #include <linux/kernel.h> |
| 23 | #include <linux/module.h> |
| 24 | #include <linux/usb.h> |
| 25 | #include <linux/usb/hcd.h> |
Andrew Victor | 39a269c | 2006-01-22 10:32:13 -0800 | [diff] [blame] | 26 | |
Russell King | a09e64f | 2008-08-05 16:14:15 +0100 | [diff] [blame] | 27 | #include <mach/hardware.h> |
David Brownell | 4bde4a4 | 2007-12-27 11:19:49 -0800 | [diff] [blame] | 28 | #include <asm/gpio.h> |
| 29 | |
Russell King | a09e64f | 2008-08-05 16:14:15 +0100 | [diff] [blame] | 30 | #include <mach/cpu.h> |
Andrew Victor | 39a269c | 2006-01-22 10:32:13 -0800 | [diff] [blame] | 31 | |
Manjunath Goudar | e3825b4 | 2013-09-21 16:38:42 +0530 | [diff] [blame] | 32 | |
| 33 | #include "ohci.h" |
Andrew Victor | 39a269c | 2006-01-22 10:32:13 -0800 | [diff] [blame] | 34 | |
Nicolas Ferre | 0ee6d1e | 2012-03-21 16:53:09 +0100 | [diff] [blame] | 35 | #define valid_port(index) ((index) >= 0 && (index) < AT91_MAX_USBH_PORTS) |
| 36 | #define at91_for_each_port(index) \ |
| 37 | for ((index) = 0; (index) < AT91_MAX_USBH_PORTS; (index)++) |
| 38 | |
Boris BREZILLON | 6b0a1cf | 2013-08-01 19:09:13 +0200 | [diff] [blame] | 39 | /* interface, function and usb clocks; sometimes also an AHB clock */ |
| 40 | static struct clk *iclk, *fclk, *uclk, *hclk; |
Manjunath Goudar | e3825b4 | 2013-09-21 16:38:42 +0530 | [diff] [blame] | 41 | /* interface and function clocks; sometimes also an AHB clock */ |
| 42 | |
| 43 | #define DRIVER_DESC "OHCI Atmel driver" |
| 44 | |
| 45 | static const char hcd_name[] = "ohci-atmel"; |
| 46 | |
| 47 | static struct hc_driver __read_mostly ohci_at91_hc_driver; |
David Brownell | 0365ee0 | 2006-06-19 14:27:20 -0700 | [diff] [blame] | 48 | static int clocked; |
Manjunath Goudar | e3825b4 | 2013-09-21 16:38:42 +0530 | [diff] [blame] | 49 | static int (*orig_ohci_hub_control)(struct usb_hcd *hcd, u16 typeReq, |
| 50 | u16 wValue, u16 wIndex, char *buf, u16 wLength); |
| 51 | static int (*orig_ohci_hub_status_data)(struct usb_hcd *hcd, char *buf); |
Andrew Victor | 39a269c | 2006-01-22 10:32:13 -0800 | [diff] [blame] | 52 | |
| 53 | extern int usb_disabled(void); |
| 54 | |
| 55 | /*-------------------------------------------------------------------------*/ |
| 56 | |
Andrew Victor | ed077bb | 2007-02-16 10:18:58 -0800 | [diff] [blame] | 57 | static void at91_start_clock(void) |
| 58 | { |
Boris BREZILLON | 6b0a1cf | 2013-08-01 19:09:13 +0200 | [diff] [blame] | 59 | if (IS_ENABLED(CONFIG_COMMON_CLK)) { |
| 60 | clk_set_rate(uclk, 48000000); |
| 61 | clk_prepare_enable(uclk); |
| 62 | } |
Boris BREZILLON | 8e82d8d | 2013-06-19 13:21:08 +0200 | [diff] [blame] | 63 | clk_prepare_enable(hclk); |
| 64 | clk_prepare_enable(iclk); |
| 65 | clk_prepare_enable(fclk); |
Andrew Victor | ed077bb | 2007-02-16 10:18:58 -0800 | [diff] [blame] | 66 | clocked = 1; |
| 67 | } |
| 68 | |
| 69 | static void at91_stop_clock(void) |
| 70 | { |
Boris BREZILLON | 8e82d8d | 2013-06-19 13:21:08 +0200 | [diff] [blame] | 71 | clk_disable_unprepare(fclk); |
| 72 | clk_disable_unprepare(iclk); |
| 73 | clk_disable_unprepare(hclk); |
Boris BREZILLON | 6b0a1cf | 2013-08-01 19:09:13 +0200 | [diff] [blame] | 74 | if (IS_ENABLED(CONFIG_COMMON_CLK)) |
| 75 | clk_disable_unprepare(uclk); |
Andrew Victor | ed077bb | 2007-02-16 10:18:58 -0800 | [diff] [blame] | 76 | clocked = 0; |
| 77 | } |
| 78 | |
Andrew Victor | 39a269c | 2006-01-22 10:32:13 -0800 | [diff] [blame] | 79 | static void at91_start_hc(struct platform_device *pdev) |
| 80 | { |
| 81 | struct usb_hcd *hcd = platform_get_drvdata(pdev); |
| 82 | struct ohci_regs __iomem *regs = hcd->regs; |
| 83 | |
David Brownell | 0365ee0 | 2006-06-19 14:27:20 -0700 | [diff] [blame] | 84 | dev_dbg(&pdev->dev, "start\n"); |
Andrew Victor | 39a269c | 2006-01-22 10:32:13 -0800 | [diff] [blame] | 85 | |
| 86 | /* |
| 87 | * Start the USB clocks. |
| 88 | */ |
Andrew Victor | ed077bb | 2007-02-16 10:18:58 -0800 | [diff] [blame] | 89 | at91_start_clock(); |
Andrew Victor | 39a269c | 2006-01-22 10:32:13 -0800 | [diff] [blame] | 90 | |
| 91 | /* |
| 92 | * The USB host controller must remain in reset. |
| 93 | */ |
| 94 | writel(0, ®s->control); |
| 95 | } |
| 96 | |
| 97 | static void at91_stop_hc(struct platform_device *pdev) |
| 98 | { |
| 99 | struct usb_hcd *hcd = platform_get_drvdata(pdev); |
| 100 | struct ohci_regs __iomem *regs = hcd->regs; |
| 101 | |
David Brownell | 0365ee0 | 2006-06-19 14:27:20 -0700 | [diff] [blame] | 102 | dev_dbg(&pdev->dev, "stop\n"); |
Andrew Victor | 39a269c | 2006-01-22 10:32:13 -0800 | [diff] [blame] | 103 | |
| 104 | /* |
| 105 | * Put the USB host controller into reset. |
| 106 | */ |
| 107 | writel(0, ®s->control); |
| 108 | |
| 109 | /* |
| 110 | * Stop the USB clocks. |
| 111 | */ |
Andrew Victor | ed077bb | 2007-02-16 10:18:58 -0800 | [diff] [blame] | 112 | at91_stop_clock(); |
Andrew Victor | 39a269c | 2006-01-22 10:32:13 -0800 | [diff] [blame] | 113 | } |
| 114 | |
| 115 | |
| 116 | /*-------------------------------------------------------------------------*/ |
| 117 | |
Bill Pemberton | fb4e98a | 2012-11-19 13:26:20 -0500 | [diff] [blame] | 118 | static void usb_hcd_at91_remove (struct usb_hcd *, struct platform_device *); |
Andrew Victor | 39a269c | 2006-01-22 10:32:13 -0800 | [diff] [blame] | 119 | |
| 120 | /* configure so an HC device and id are always provided */ |
| 121 | /* always called with process context; sleeping is OK */ |
| 122 | |
| 123 | |
| 124 | /** |
David Brownell | 0365ee0 | 2006-06-19 14:27:20 -0700 | [diff] [blame] | 125 | * usb_hcd_at91_probe - initialize AT91-based HCDs |
Andrew Victor | 39a269c | 2006-01-22 10:32:13 -0800 | [diff] [blame] | 126 | * Context: !in_interrupt() |
| 127 | * |
| 128 | * Allocates basic resources for this USB host controller, and |
| 129 | * then invokes the start() method for the HCD associated with it |
| 130 | * through the hotplug entry's driver_data. |
Andrew Victor | 39a269c | 2006-01-22 10:32:13 -0800 | [diff] [blame] | 131 | */ |
Bill Pemberton | 41ac7b3 | 2012-11-19 13:21:48 -0500 | [diff] [blame] | 132 | static int usb_hcd_at91_probe(const struct hc_driver *driver, |
David Brownell | 0365ee0 | 2006-06-19 14:27:20 -0700 | [diff] [blame] | 133 | struct platform_device *pdev) |
Andrew Victor | 39a269c | 2006-01-22 10:32:13 -0800 | [diff] [blame] | 134 | { |
Manjunath Goudar | e3825b4 | 2013-09-21 16:38:42 +0530 | [diff] [blame] | 135 | struct at91_usbh_data *board; |
| 136 | struct ohci_hcd *ohci; |
Andrew Victor | 39a269c | 2006-01-22 10:32:13 -0800 | [diff] [blame] | 137 | int retval; |
| 138 | struct usb_hcd *hcd = NULL; |
| 139 | |
| 140 | if (pdev->num_resources != 2) { |
| 141 | pr_debug("hcd probe: invalid num_resources"); |
| 142 | return -ENODEV; |
| 143 | } |
| 144 | |
David Brownell | 0365ee0 | 2006-06-19 14:27:20 -0700 | [diff] [blame] | 145 | if ((pdev->resource[0].flags != IORESOURCE_MEM) |
| 146 | || (pdev->resource[1].flags != IORESOURCE_IRQ)) { |
Andrew Victor | 39a269c | 2006-01-22 10:32:13 -0800 | [diff] [blame] | 147 | pr_debug("hcd probe: invalid resource type\n"); |
| 148 | return -ENODEV; |
| 149 | } |
| 150 | |
David Brownell | 0365ee0 | 2006-06-19 14:27:20 -0700 | [diff] [blame] | 151 | hcd = usb_create_hcd(driver, &pdev->dev, "at91"); |
Andrew Victor | 39a269c | 2006-01-22 10:32:13 -0800 | [diff] [blame] | 152 | if (!hcd) |
| 153 | return -ENOMEM; |
| 154 | hcd->rsrc_start = pdev->resource[0].start; |
Nicolas Ferre | 7a82f61 | 2012-05-09 10:49:41 +0200 | [diff] [blame] | 155 | hcd->rsrc_len = resource_size(&pdev->resource[0]); |
Andrew Victor | 39a269c | 2006-01-22 10:32:13 -0800 | [diff] [blame] | 156 | |
| 157 | if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) { |
| 158 | pr_debug("request_mem_region failed\n"); |
| 159 | retval = -EBUSY; |
| 160 | goto err1; |
| 161 | } |
| 162 | |
| 163 | hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len); |
| 164 | if (!hcd->regs) { |
| 165 | pr_debug("ioremap failed\n"); |
| 166 | retval = -EIO; |
| 167 | goto err2; |
| 168 | } |
| 169 | |
| 170 | iclk = clk_get(&pdev->dev, "ohci_clk"); |
Jean-Christophe PLAGNIOL-VILLARD | 6813463 | 2011-12-08 16:32:00 +0100 | [diff] [blame] | 171 | if (IS_ERR(iclk)) { |
| 172 | dev_err(&pdev->dev, "failed to get ohci_clk\n"); |
| 173 | retval = PTR_ERR(iclk); |
| 174 | goto err3; |
| 175 | } |
Andrew Victor | 39a269c | 2006-01-22 10:32:13 -0800 | [diff] [blame] | 176 | fclk = clk_get(&pdev->dev, "uhpck"); |
Jean-Christophe PLAGNIOL-VILLARD | 6813463 | 2011-12-08 16:32:00 +0100 | [diff] [blame] | 177 | if (IS_ERR(fclk)) { |
| 178 | dev_err(&pdev->dev, "failed to get uhpck\n"); |
| 179 | retval = PTR_ERR(fclk); |
| 180 | goto err4; |
| 181 | } |
Jean-Christophe PLAGNIOL-VILLARD | 0af4316 | 2011-08-30 03:29:28 +0200 | [diff] [blame] | 182 | hclk = clk_get(&pdev->dev, "hclk"); |
Jean-Christophe PLAGNIOL-VILLARD | 6813463 | 2011-12-08 16:32:00 +0100 | [diff] [blame] | 183 | if (IS_ERR(hclk)) { |
| 184 | dev_err(&pdev->dev, "failed to get hclk\n"); |
| 185 | retval = PTR_ERR(hclk); |
| 186 | goto err5; |
| 187 | } |
Boris BREZILLON | 6b0a1cf | 2013-08-01 19:09:13 +0200 | [diff] [blame] | 188 | if (IS_ENABLED(CONFIG_COMMON_CLK)) { |
| 189 | uclk = clk_get(&pdev->dev, "usb_clk"); |
| 190 | if (IS_ERR(uclk)) { |
| 191 | dev_err(&pdev->dev, "failed to get uclk\n"); |
| 192 | retval = PTR_ERR(uclk); |
| 193 | goto err6; |
| 194 | } |
| 195 | } |
Andrew Victor | 39a269c | 2006-01-22 10:32:13 -0800 | [diff] [blame] | 196 | |
Manjunath Goudar | e3825b4 | 2013-09-21 16:38:42 +0530 | [diff] [blame] | 197 | board = hcd->self.controller->platform_data; |
| 198 | ohci = hcd_to_ohci(hcd); |
| 199 | ohci->num_ports = board->ports; |
Andrew Victor | 39a269c | 2006-01-22 10:32:13 -0800 | [diff] [blame] | 200 | at91_start_hc(pdev); |
Andrew Victor | 39a269c | 2006-01-22 10:32:13 -0800 | [diff] [blame] | 201 | |
Nicolas Ferre | 2f2cac3 | 2009-07-27 14:59:24 -0700 | [diff] [blame] | 202 | retval = usb_add_hcd(hcd, pdev->resource[1].start, IRQF_SHARED); |
Peter Chen | 3c9740a | 2013-11-05 10:46:02 +0800 | [diff] [blame] | 203 | if (retval == 0) { |
| 204 | device_wakeup_enable(hcd->self.controller); |
Andrew Victor | 39a269c | 2006-01-22 10:32:13 -0800 | [diff] [blame] | 205 | return retval; |
Peter Chen | 3c9740a | 2013-11-05 10:46:02 +0800 | [diff] [blame] | 206 | } |
Andrew Victor | 39a269c | 2006-01-22 10:32:13 -0800 | [diff] [blame] | 207 | |
| 208 | /* Error handling */ |
| 209 | at91_stop_hc(pdev); |
| 210 | |
Boris BREZILLON | 6b0a1cf | 2013-08-01 19:09:13 +0200 | [diff] [blame] | 211 | if (IS_ENABLED(CONFIG_COMMON_CLK)) |
| 212 | clk_put(uclk); |
| 213 | err6: |
Jean-Christophe PLAGNIOL-VILLARD | 0af4316 | 2011-08-30 03:29:28 +0200 | [diff] [blame] | 214 | clk_put(hclk); |
Jean-Christophe PLAGNIOL-VILLARD | 6813463 | 2011-12-08 16:32:00 +0100 | [diff] [blame] | 215 | err5: |
Andrew Victor | 39a269c | 2006-01-22 10:32:13 -0800 | [diff] [blame] | 216 | clk_put(fclk); |
Jean-Christophe PLAGNIOL-VILLARD | 6813463 | 2011-12-08 16:32:00 +0100 | [diff] [blame] | 217 | err4: |
Andrew Victor | 39a269c | 2006-01-22 10:32:13 -0800 | [diff] [blame] | 218 | clk_put(iclk); |
| 219 | |
Jean-Christophe PLAGNIOL-VILLARD | 6813463 | 2011-12-08 16:32:00 +0100 | [diff] [blame] | 220 | err3: |
Andrew Victor | 39a269c | 2006-01-22 10:32:13 -0800 | [diff] [blame] | 221 | iounmap(hcd->regs); |
| 222 | |
| 223 | err2: |
| 224 | release_mem_region(hcd->rsrc_start, hcd->rsrc_len); |
| 225 | |
| 226 | err1: |
| 227 | usb_put_hcd(hcd); |
| 228 | return retval; |
| 229 | } |
| 230 | |
| 231 | |
Andrew Victor | 39a269c | 2006-01-22 10:32:13 -0800 | [diff] [blame] | 232 | /* may be called with controller, bus, and devices active */ |
| 233 | |
| 234 | /** |
David Brownell | 0365ee0 | 2006-06-19 14:27:20 -0700 | [diff] [blame] | 235 | * usb_hcd_at91_remove - shutdown processing for AT91-based HCDs |
Andrew Victor | 39a269c | 2006-01-22 10:32:13 -0800 | [diff] [blame] | 236 | * @dev: USB Host Controller being removed |
| 237 | * Context: !in_interrupt() |
| 238 | * |
| 239 | * Reverses the effect of usb_hcd_at91_probe(), first invoking |
| 240 | * the HCD's stop() method. It is always called from a thread |
David Brownell | 0365ee0 | 2006-06-19 14:27:20 -0700 | [diff] [blame] | 241 | * context, "rmmod" or something similar. |
Andrew Victor | 39a269c | 2006-01-22 10:32:13 -0800 | [diff] [blame] | 242 | * |
| 243 | */ |
Bill Pemberton | fb4e98a | 2012-11-19 13:26:20 -0500 | [diff] [blame] | 244 | static void usb_hcd_at91_remove(struct usb_hcd *hcd, |
David Brownell | 0365ee0 | 2006-06-19 14:27:20 -0700 | [diff] [blame] | 245 | struct platform_device *pdev) |
Andrew Victor | 39a269c | 2006-01-22 10:32:13 -0800 | [diff] [blame] | 246 | { |
| 247 | usb_remove_hcd(hcd); |
| 248 | at91_stop_hc(pdev); |
| 249 | iounmap(hcd->regs); |
David Brownell | 68ba61b | 2006-04-02 20:26:21 -0800 | [diff] [blame] | 250 | release_mem_region(hcd->rsrc_start, hcd->rsrc_len); |
Pete Zaitcev | 421b4bf | 2008-06-01 14:38:43 -0700 | [diff] [blame] | 251 | usb_put_hcd(hcd); |
Andrew Victor | 39a269c | 2006-01-22 10:32:13 -0800 | [diff] [blame] | 252 | |
Boris BREZILLON | 6b0a1cf | 2013-08-01 19:09:13 +0200 | [diff] [blame] | 253 | if (IS_ENABLED(CONFIG_COMMON_CLK)) |
| 254 | clk_put(uclk); |
Jean-Christophe PLAGNIOL-VILLARD | 0af4316 | 2011-08-30 03:29:28 +0200 | [diff] [blame] | 255 | clk_put(hclk); |
David Brownell | 68ba61b | 2006-04-02 20:26:21 -0800 | [diff] [blame] | 256 | clk_put(fclk); |
| 257 | clk_put(iclk); |
Andrew Victor | ed077bb | 2007-02-16 10:18:58 -0800 | [diff] [blame] | 258 | fclk = iclk = hclk = NULL; |
Andrew Victor | 39a269c | 2006-01-22 10:32:13 -0800 | [diff] [blame] | 259 | } |
| 260 | |
| 261 | /*-------------------------------------------------------------------------*/ |
Thomas Petazzoni | aa6e52a | 2011-07-13 11:29:17 +0200 | [diff] [blame] | 262 | static void ohci_at91_usb_set_power(struct at91_usbh_data *pdata, int port, int enable) |
| 263 | { |
Nicolas Ferre | 0ee6d1e | 2012-03-21 16:53:09 +0100 | [diff] [blame] | 264 | if (!valid_port(port)) |
Thomas Petazzoni | aa6e52a | 2011-07-13 11:29:17 +0200 | [diff] [blame] | 265 | return; |
| 266 | |
Jean-Christophe PLAGNIOL-VILLARD | 8a7a49d | 2011-09-19 15:32:23 +0800 | [diff] [blame] | 267 | if (!gpio_is_valid(pdata->vbus_pin[port])) |
Jean-Christophe PLAGNIOL-VILLARD | 770f0ba | 2011-11-12 16:46:13 +0100 | [diff] [blame] | 268 | return; |
| 269 | |
Jean-Christophe PLAGNIOL-VILLARD | 8134ff5 | 2011-12-08 16:32:01 +0100 | [diff] [blame] | 270 | gpio_set_value(pdata->vbus_pin[port], |
Nicolas Ferre | 1e7caf8 | 2012-03-21 14:38:55 +0100 | [diff] [blame] | 271 | pdata->vbus_pin_active_low[port] ^ enable); |
Thomas Petazzoni | aa6e52a | 2011-07-13 11:29:17 +0200 | [diff] [blame] | 272 | } |
| 273 | |
| 274 | static int ohci_at91_usb_get_power(struct at91_usbh_data *pdata, int port) |
| 275 | { |
Nicolas Ferre | 0ee6d1e | 2012-03-21 16:53:09 +0100 | [diff] [blame] | 276 | if (!valid_port(port)) |
Thomas Petazzoni | aa6e52a | 2011-07-13 11:29:17 +0200 | [diff] [blame] | 277 | return -EINVAL; |
| 278 | |
Jean-Christophe PLAGNIOL-VILLARD | 8a7a49d | 2011-09-19 15:32:23 +0800 | [diff] [blame] | 279 | if (!gpio_is_valid(pdata->vbus_pin[port])) |
Jean-Christophe PLAGNIOL-VILLARD | 770f0ba | 2011-11-12 16:46:13 +0100 | [diff] [blame] | 280 | return -EINVAL; |
| 281 | |
Jean-Christophe PLAGNIOL-VILLARD | 8134ff5 | 2011-12-08 16:32:01 +0100 | [diff] [blame] | 282 | return gpio_get_value(pdata->vbus_pin[port]) ^ |
Nicolas Ferre | 1e7caf8 | 2012-03-21 14:38:55 +0100 | [diff] [blame] | 283 | pdata->vbus_pin_active_low[port]; |
Thomas Petazzoni | aa6e52a | 2011-07-13 11:29:17 +0200 | [diff] [blame] | 284 | } |
| 285 | |
| 286 | /* |
| 287 | * Update the status data from the hub with the over-current indicator change. |
| 288 | */ |
| 289 | static int ohci_at91_hub_status_data(struct usb_hcd *hcd, char *buf) |
| 290 | { |
Manjunath Goudar | e3825b4 | 2013-09-21 16:38:42 +0530 | [diff] [blame] | 291 | struct at91_usbh_data *pdata = hcd->self.controller->platform_data; |
| 292 | int length = orig_ohci_hub_status_data(hcd, buf); |
Thomas Petazzoni | aa6e52a | 2011-07-13 11:29:17 +0200 | [diff] [blame] | 293 | int port; |
| 294 | |
Nicolas Ferre | 0ee6d1e | 2012-03-21 16:53:09 +0100 | [diff] [blame] | 295 | at91_for_each_port(port) { |
Thomas Petazzoni | aa6e52a | 2011-07-13 11:29:17 +0200 | [diff] [blame] | 296 | if (pdata->overcurrent_changed[port]) { |
Nicolas Ferre | 0ee6d1e | 2012-03-21 16:53:09 +0100 | [diff] [blame] | 297 | if (!length) |
Thomas Petazzoni | aa6e52a | 2011-07-13 11:29:17 +0200 | [diff] [blame] | 298 | length = 1; |
| 299 | buf[0] |= 1 << (port + 1); |
| 300 | } |
| 301 | } |
| 302 | |
| 303 | return length; |
| 304 | } |
| 305 | |
| 306 | /* |
| 307 | * Look at the control requests to the root hub and see if we need to override. |
| 308 | */ |
| 309 | static int ohci_at91_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue, |
| 310 | u16 wIndex, char *buf, u16 wLength) |
| 311 | { |
Jingoo Han | d4f09e2 | 2013-07-30 19:59:40 +0900 | [diff] [blame] | 312 | struct at91_usbh_data *pdata = dev_get_platdata(hcd->self.controller); |
Thomas Petazzoni | aa6e52a | 2011-07-13 11:29:17 +0200 | [diff] [blame] | 313 | struct usb_hub_descriptor *desc; |
| 314 | int ret = -EINVAL; |
| 315 | u32 *data = (u32 *)buf; |
| 316 | |
| 317 | dev_dbg(hcd->self.controller, |
| 318 | "ohci_at91_hub_control(%p,0x%04x,0x%04x,0x%04x,%p,%04x)\n", |
| 319 | hcd, typeReq, wValue, wIndex, buf, wLength); |
| 320 | |
Nicolas Ferre | 0ee6d1e | 2012-03-21 16:53:09 +0100 | [diff] [blame] | 321 | wIndex--; |
| 322 | |
Thomas Petazzoni | aa6e52a | 2011-07-13 11:29:17 +0200 | [diff] [blame] | 323 | switch (typeReq) { |
| 324 | case SetPortFeature: |
| 325 | if (wValue == USB_PORT_FEAT_POWER) { |
| 326 | dev_dbg(hcd->self.controller, "SetPortFeat: POWER\n"); |
Nicolas Ferre | 0ee6d1e | 2012-03-21 16:53:09 +0100 | [diff] [blame] | 327 | if (valid_port(wIndex)) { |
| 328 | ohci_at91_usb_set_power(pdata, wIndex, 1); |
| 329 | ret = 0; |
| 330 | } |
| 331 | |
Thomas Petazzoni | aa6e52a | 2011-07-13 11:29:17 +0200 | [diff] [blame] | 332 | goto out; |
| 333 | } |
| 334 | break; |
| 335 | |
| 336 | case ClearPortFeature: |
| 337 | switch (wValue) { |
| 338 | case USB_PORT_FEAT_C_OVER_CURRENT: |
| 339 | dev_dbg(hcd->self.controller, |
| 340 | "ClearPortFeature: C_OVER_CURRENT\n"); |
| 341 | |
Nicolas Ferre | 0ee6d1e | 2012-03-21 16:53:09 +0100 | [diff] [blame] | 342 | if (valid_port(wIndex)) { |
| 343 | pdata->overcurrent_changed[wIndex] = 0; |
| 344 | pdata->overcurrent_status[wIndex] = 0; |
Thomas Petazzoni | aa6e52a | 2011-07-13 11:29:17 +0200 | [diff] [blame] | 345 | } |
| 346 | |
| 347 | goto out; |
| 348 | |
| 349 | case USB_PORT_FEAT_OVER_CURRENT: |
| 350 | dev_dbg(hcd->self.controller, |
| 351 | "ClearPortFeature: OVER_CURRENT\n"); |
| 352 | |
Nicolas Ferre | 0ee6d1e | 2012-03-21 16:53:09 +0100 | [diff] [blame] | 353 | if (valid_port(wIndex)) |
| 354 | pdata->overcurrent_status[wIndex] = 0; |
Thomas Petazzoni | aa6e52a | 2011-07-13 11:29:17 +0200 | [diff] [blame] | 355 | |
| 356 | goto out; |
| 357 | |
| 358 | case USB_PORT_FEAT_POWER: |
| 359 | dev_dbg(hcd->self.controller, |
| 360 | "ClearPortFeature: POWER\n"); |
| 361 | |
Nicolas Ferre | 0ee6d1e | 2012-03-21 16:53:09 +0100 | [diff] [blame] | 362 | if (valid_port(wIndex)) { |
| 363 | ohci_at91_usb_set_power(pdata, wIndex, 0); |
Thomas Petazzoni | aa6e52a | 2011-07-13 11:29:17 +0200 | [diff] [blame] | 364 | return 0; |
| 365 | } |
| 366 | } |
| 367 | break; |
| 368 | } |
| 369 | |
Manjunath Goudar | e3825b4 | 2013-09-21 16:38:42 +0530 | [diff] [blame] | 370 | ret = orig_ohci_hub_control(hcd, typeReq, wValue, wIndex + 1, |
| 371 | buf, wLength); |
Thomas Petazzoni | aa6e52a | 2011-07-13 11:29:17 +0200 | [diff] [blame] | 372 | if (ret) |
| 373 | goto out; |
| 374 | |
| 375 | switch (typeReq) { |
| 376 | case GetHubDescriptor: |
| 377 | |
| 378 | /* update the hub's descriptor */ |
| 379 | |
| 380 | desc = (struct usb_hub_descriptor *)buf; |
| 381 | |
| 382 | dev_dbg(hcd->self.controller, "wHubCharacteristics 0x%04x\n", |
| 383 | desc->wHubCharacteristics); |
| 384 | |
| 385 | /* remove the old configurations for power-switching, and |
| 386 | * over-current protection, and insert our new configuration |
| 387 | */ |
| 388 | |
| 389 | desc->wHubCharacteristics &= ~cpu_to_le16(HUB_CHAR_LPSM); |
| 390 | desc->wHubCharacteristics |= cpu_to_le16(0x0001); |
| 391 | |
| 392 | if (pdata->overcurrent_supported) { |
| 393 | desc->wHubCharacteristics &= ~cpu_to_le16(HUB_CHAR_OCPM); |
| 394 | desc->wHubCharacteristics |= cpu_to_le16(0x0008|0x0001); |
| 395 | } |
| 396 | |
| 397 | dev_dbg(hcd->self.controller, "wHubCharacteristics after 0x%04x\n", |
| 398 | desc->wHubCharacteristics); |
| 399 | |
| 400 | return ret; |
| 401 | |
| 402 | case GetPortStatus: |
| 403 | /* check port status */ |
| 404 | |
| 405 | dev_dbg(hcd->self.controller, "GetPortStatus(%d)\n", wIndex); |
| 406 | |
Nicolas Ferre | 0ee6d1e | 2012-03-21 16:53:09 +0100 | [diff] [blame] | 407 | if (valid_port(wIndex)) { |
| 408 | if (!ohci_at91_usb_get_power(pdata, wIndex)) |
Thomas Petazzoni | aa6e52a | 2011-07-13 11:29:17 +0200 | [diff] [blame] | 409 | *data &= ~cpu_to_le32(RH_PS_PPS); |
Thomas Petazzoni | aa6e52a | 2011-07-13 11:29:17 +0200 | [diff] [blame] | 410 | |
Nicolas Ferre | 0ee6d1e | 2012-03-21 16:53:09 +0100 | [diff] [blame] | 411 | if (pdata->overcurrent_changed[wIndex]) |
Thomas Petazzoni | aa6e52a | 2011-07-13 11:29:17 +0200 | [diff] [blame] | 412 | *data |= cpu_to_le32(RH_PS_OCIC); |
Thomas Petazzoni | aa6e52a | 2011-07-13 11:29:17 +0200 | [diff] [blame] | 413 | |
Nicolas Ferre | 0ee6d1e | 2012-03-21 16:53:09 +0100 | [diff] [blame] | 414 | if (pdata->overcurrent_status[wIndex]) |
Thomas Petazzoni | aa6e52a | 2011-07-13 11:29:17 +0200 | [diff] [blame] | 415 | *data |= cpu_to_le32(RH_PS_POCI); |
Thomas Petazzoni | aa6e52a | 2011-07-13 11:29:17 +0200 | [diff] [blame] | 416 | } |
| 417 | } |
| 418 | |
| 419 | out: |
| 420 | return ret; |
| 421 | } |
| 422 | |
Andrew Victor | 39a269c | 2006-01-22 10:32:13 -0800 | [diff] [blame] | 423 | /*-------------------------------------------------------------------------*/ |
| 424 | |
Thomas Petazzoni | aa6e52a | 2011-07-13 11:29:17 +0200 | [diff] [blame] | 425 | static irqreturn_t ohci_hcd_at91_overcurrent_irq(int irq, void *data) |
| 426 | { |
| 427 | struct platform_device *pdev = data; |
Jingoo Han | d4f09e2 | 2013-07-30 19:59:40 +0900 | [diff] [blame] | 428 | struct at91_usbh_data *pdata = dev_get_platdata(&pdev->dev); |
Thomas Petazzoni | aa6e52a | 2011-07-13 11:29:17 +0200 | [diff] [blame] | 429 | int val, gpio, port; |
| 430 | |
| 431 | /* From the GPIO notifying the over-current situation, find |
| 432 | * out the corresponding port */ |
Nicolas Ferre | 0ee6d1e | 2012-03-21 16:53:09 +0100 | [diff] [blame] | 433 | at91_for_each_port(port) { |
Joachim Eastwood | 01bb650 | 2012-09-23 22:56:00 +0200 | [diff] [blame] | 434 | if (gpio_is_valid(pdata->overcurrent_pin[port]) && |
| 435 | gpio_to_irq(pdata->overcurrent_pin[port]) == irq) { |
Nicolas Ferre | e449907 | 2012-02-11 14:23:06 +0100 | [diff] [blame] | 436 | gpio = pdata->overcurrent_pin[port]; |
Thomas Petazzoni | aa6e52a | 2011-07-13 11:29:17 +0200 | [diff] [blame] | 437 | break; |
Nicolas Ferre | e449907 | 2012-02-11 14:23:06 +0100 | [diff] [blame] | 438 | } |
Thomas Petazzoni | aa6e52a | 2011-07-13 11:29:17 +0200 | [diff] [blame] | 439 | } |
| 440 | |
Nicolas Ferre | 0ee6d1e | 2012-03-21 16:53:09 +0100 | [diff] [blame] | 441 | if (port == AT91_MAX_USBH_PORTS) { |
Thomas Petazzoni | aa6e52a | 2011-07-13 11:29:17 +0200 | [diff] [blame] | 442 | dev_err(& pdev->dev, "overcurrent interrupt from unknown GPIO\n"); |
| 443 | return IRQ_HANDLED; |
| 444 | } |
| 445 | |
| 446 | val = gpio_get_value(gpio); |
| 447 | |
| 448 | /* When notified of an over-current situation, disable power |
| 449 | on the corresponding port, and mark this port in |
| 450 | over-current. */ |
Nicolas Ferre | 0ee6d1e | 2012-03-21 16:53:09 +0100 | [diff] [blame] | 451 | if (!val) { |
Thomas Petazzoni | aa6e52a | 2011-07-13 11:29:17 +0200 | [diff] [blame] | 452 | ohci_at91_usb_set_power(pdata, port, 0); |
| 453 | pdata->overcurrent_status[port] = 1; |
| 454 | pdata->overcurrent_changed[port] = 1; |
| 455 | } |
| 456 | |
| 457 | dev_dbg(& pdev->dev, "overcurrent situation %s\n", |
| 458 | val ? "exited" : "notified"); |
| 459 | |
| 460 | return IRQ_HANDLED; |
| 461 | } |
| 462 | |
Jean-Christophe PLAGNIOL-VILLARD | 2419730 | 2011-11-21 06:55:18 +0800 | [diff] [blame] | 463 | #ifdef CONFIG_OF |
| 464 | static const struct of_device_id at91_ohci_dt_ids[] = { |
| 465 | { .compatible = "atmel,at91rm9200-ohci" }, |
| 466 | { /* sentinel */ } |
| 467 | }; |
| 468 | |
| 469 | MODULE_DEVICE_TABLE(of, at91_ohci_dt_ids); |
| 470 | |
Bill Pemberton | 41ac7b3 | 2012-11-19 13:21:48 -0500 | [diff] [blame] | 471 | static int ohci_at91_of_init(struct platform_device *pdev) |
Jean-Christophe PLAGNIOL-VILLARD | 2419730 | 2011-11-21 06:55:18 +0800 | [diff] [blame] | 472 | { |
| 473 | struct device_node *np = pdev->dev.of_node; |
Russell King | 22d9d8e | 2013-06-10 16:28:49 +0100 | [diff] [blame] | 474 | int i, gpio, ret; |
Jean-Christophe PLAGNIOL-VILLARD | 2419730 | 2011-11-21 06:55:18 +0800 | [diff] [blame] | 475 | enum of_gpio_flags flags; |
| 476 | struct at91_usbh_data *pdata; |
| 477 | u32 ports; |
| 478 | |
| 479 | if (!np) |
| 480 | return 0; |
| 481 | |
| 482 | /* Right now device-tree probed devices don't get dma_mask set. |
| 483 | * Since shared usb code relies on it, set it here for now. |
| 484 | * Once we have dma capability bindings this can go away. |
| 485 | */ |
Russell King | e1fd734 | 2013-06-27 12:36:37 +0100 | [diff] [blame] | 486 | ret = dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32)); |
Russell King | 22d9d8e | 2013-06-10 16:28:49 +0100 | [diff] [blame] | 487 | if (ret) |
| 488 | return ret; |
Jean-Christophe PLAGNIOL-VILLARD | 2419730 | 2011-11-21 06:55:18 +0800 | [diff] [blame] | 489 | |
| 490 | pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL); |
| 491 | if (!pdata) |
| 492 | return -ENOMEM; |
| 493 | |
| 494 | if (!of_property_read_u32(np, "num-ports", &ports)) |
| 495 | pdata->ports = ports; |
| 496 | |
Nicolas Ferre | 0ee6d1e | 2012-03-21 16:53:09 +0100 | [diff] [blame] | 497 | at91_for_each_port(i) { |
Jean-Christophe PLAGNIOL-VILLARD | 2419730 | 2011-11-21 06:55:18 +0800 | [diff] [blame] | 498 | gpio = of_get_named_gpio_flags(np, "atmel,vbus-gpio", i, &flags); |
| 499 | pdata->vbus_pin[i] = gpio; |
| 500 | if (!gpio_is_valid(gpio)) |
| 501 | continue; |
| 502 | pdata->vbus_pin_active_low[i] = flags & OF_GPIO_ACTIVE_LOW; |
Jean-Christophe PLAGNIOL-VILLARD | 2419730 | 2011-11-21 06:55:18 +0800 | [diff] [blame] | 503 | } |
| 504 | |
Nicolas Ferre | 0ee6d1e | 2012-03-21 16:53:09 +0100 | [diff] [blame] | 505 | at91_for_each_port(i) |
Nicolas Ferre | aaf9f5f | 2012-03-21 16:58:11 +0100 | [diff] [blame] | 506 | pdata->overcurrent_pin[i] = |
| 507 | of_get_named_gpio_flags(np, "atmel,oc-gpio", i, &flags); |
Jean-Christophe PLAGNIOL-VILLARD | 2419730 | 2011-11-21 06:55:18 +0800 | [diff] [blame] | 508 | |
| 509 | pdev->dev.platform_data = pdata; |
| 510 | |
| 511 | return 0; |
| 512 | } |
| 513 | #else |
Bill Pemberton | 41ac7b3 | 2012-11-19 13:21:48 -0500 | [diff] [blame] | 514 | static int ohci_at91_of_init(struct platform_device *pdev) |
Jean-Christophe PLAGNIOL-VILLARD | 2419730 | 2011-11-21 06:55:18 +0800 | [diff] [blame] | 515 | { |
| 516 | return 0; |
| 517 | } |
| 518 | #endif |
| 519 | |
Thomas Petazzoni | aa6e52a | 2011-07-13 11:29:17 +0200 | [diff] [blame] | 520 | /*-------------------------------------------------------------------------*/ |
| 521 | |
Bill Pemberton | 41ac7b3 | 2012-11-19 13:21:48 -0500 | [diff] [blame] | 522 | static int ohci_hcd_at91_drv_probe(struct platform_device *pdev) |
Andrew Victor | 39a269c | 2006-01-22 10:32:13 -0800 | [diff] [blame] | 523 | { |
Jean-Christophe PLAGNIOL-VILLARD | 2419730 | 2011-11-21 06:55:18 +0800 | [diff] [blame] | 524 | struct at91_usbh_data *pdata; |
David Brownell | 4bde4a4 | 2007-12-27 11:19:49 -0800 | [diff] [blame] | 525 | int i; |
Nicolas Ferre | aaf9f5f | 2012-03-21 16:58:11 +0100 | [diff] [blame] | 526 | int gpio; |
| 527 | int ret; |
David Brownell | 4bde4a4 | 2007-12-27 11:19:49 -0800 | [diff] [blame] | 528 | |
Nicolas Ferre | 1887ab2b | 2012-03-28 11:49:01 +0200 | [diff] [blame] | 529 | ret = ohci_at91_of_init(pdev); |
| 530 | if (ret) |
| 531 | return ret; |
Jean-Christophe PLAGNIOL-VILLARD | 2419730 | 2011-11-21 06:55:18 +0800 | [diff] [blame] | 532 | |
Jingoo Han | d4f09e2 | 2013-07-30 19:59:40 +0900 | [diff] [blame] | 533 | pdata = dev_get_platdata(&pdev->dev); |
Jean-Christophe PLAGNIOL-VILLARD | 2419730 | 2011-11-21 06:55:18 +0800 | [diff] [blame] | 534 | |
David Brownell | 4bde4a4 | 2007-12-27 11:19:49 -0800 | [diff] [blame] | 535 | if (pdata) { |
Nicolas Ferre | 0ee6d1e | 2012-03-21 16:53:09 +0100 | [diff] [blame] | 536 | at91_for_each_port(i) { |
Nicolas Ferre | 6fffb77 | 2012-08-29 11:49:18 +0200 | [diff] [blame] | 537 | /* |
| 538 | * do not configure PIO if not in relation with |
| 539 | * real USB port on board |
| 540 | */ |
| 541 | if (i >= pdata->ports) { |
| 542 | pdata->vbus_pin[i] = -EINVAL; |
| 543 | pdata->overcurrent_pin[i] = -EINVAL; |
| 544 | break; |
| 545 | } |
| 546 | |
Jean-Christophe PLAGNIOL-VILLARD | 8a7a49d | 2011-09-19 15:32:23 +0800 | [diff] [blame] | 547 | if (!gpio_is_valid(pdata->vbus_pin[i])) |
David Brownell | 4bde4a4 | 2007-12-27 11:19:49 -0800 | [diff] [blame] | 548 | continue; |
Nicolas Ferre | aaf9f5f | 2012-03-21 16:58:11 +0100 | [diff] [blame] | 549 | gpio = pdata->vbus_pin[i]; |
| 550 | |
| 551 | ret = gpio_request(gpio, "ohci_vbus"); |
| 552 | if (ret) { |
| 553 | dev_err(&pdev->dev, |
| 554 | "can't request vbus gpio %d\n", gpio); |
| 555 | continue; |
| 556 | } |
| 557 | ret = gpio_direction_output(gpio, |
| 558 | !pdata->vbus_pin_active_low[i]); |
| 559 | if (ret) { |
| 560 | dev_err(&pdev->dev, |
| 561 | "can't put vbus gpio %d as output %d\n", |
| 562 | gpio, !pdata->vbus_pin_active_low[i]); |
| 563 | gpio_free(gpio); |
| 564 | continue; |
| 565 | } |
| 566 | |
Thomas Petazzoni | aa6e52a | 2011-07-13 11:29:17 +0200 | [diff] [blame] | 567 | ohci_at91_usb_set_power(pdata, i, 1); |
| 568 | } |
| 569 | |
Nicolas Ferre | 0ee6d1e | 2012-03-21 16:53:09 +0100 | [diff] [blame] | 570 | at91_for_each_port(i) { |
Jean-Christophe PLAGNIOL-VILLARD | 8a7a49d | 2011-09-19 15:32:23 +0800 | [diff] [blame] | 571 | if (!gpio_is_valid(pdata->overcurrent_pin[i])) |
Thomas Petazzoni | aa6e52a | 2011-07-13 11:29:17 +0200 | [diff] [blame] | 572 | continue; |
Nicolas Ferre | aaf9f5f | 2012-03-21 16:58:11 +0100 | [diff] [blame] | 573 | gpio = pdata->overcurrent_pin[i]; |
Thomas Petazzoni | aa6e52a | 2011-07-13 11:29:17 +0200 | [diff] [blame] | 574 | |
Nicolas Ferre | aaf9f5f | 2012-03-21 16:58:11 +0100 | [diff] [blame] | 575 | ret = gpio_request(gpio, "ohci_overcurrent"); |
| 576 | if (ret) { |
| 577 | dev_err(&pdev->dev, |
| 578 | "can't request overcurrent gpio %d\n", |
| 579 | gpio); |
| 580 | continue; |
| 581 | } |
| 582 | |
| 583 | ret = gpio_direction_input(gpio); |
| 584 | if (ret) { |
| 585 | dev_err(&pdev->dev, |
| 586 | "can't configure overcurrent gpio %d as input\n", |
| 587 | gpio); |
| 588 | gpio_free(gpio); |
| 589 | continue; |
| 590 | } |
| 591 | |
| 592 | ret = request_irq(gpio_to_irq(gpio), |
Thomas Petazzoni | aa6e52a | 2011-07-13 11:29:17 +0200 | [diff] [blame] | 593 | ohci_hcd_at91_overcurrent_irq, |
| 594 | IRQF_SHARED, "ohci_overcurrent", pdev); |
| 595 | if (ret) { |
Nicolas Ferre | aaf9f5f | 2012-03-21 16:58:11 +0100 | [diff] [blame] | 596 | gpio_free(gpio); |
| 597 | dev_err(&pdev->dev, |
| 598 | "can't get gpio IRQ for overcurrent\n"); |
Thomas Petazzoni | aa6e52a | 2011-07-13 11:29:17 +0200 | [diff] [blame] | 599 | } |
David Brownell | 4bde4a4 | 2007-12-27 11:19:49 -0800 | [diff] [blame] | 600 | } |
| 601 | } |
| 602 | |
David Brownell | 0365ee0 | 2006-06-19 14:27:20 -0700 | [diff] [blame] | 603 | device_init_wakeup(&pdev->dev, 1); |
| 604 | return usb_hcd_at91_probe(&ohci_at91_hc_driver, pdev); |
Andrew Victor | 39a269c | 2006-01-22 10:32:13 -0800 | [diff] [blame] | 605 | } |
| 606 | |
Bill Pemberton | fb4e98a | 2012-11-19 13:26:20 -0500 | [diff] [blame] | 607 | static int ohci_hcd_at91_drv_remove(struct platform_device *pdev) |
Andrew Victor | 39a269c | 2006-01-22 10:32:13 -0800 | [diff] [blame] | 608 | { |
Jingoo Han | d4f09e2 | 2013-07-30 19:59:40 +0900 | [diff] [blame] | 609 | struct at91_usbh_data *pdata = dev_get_platdata(&pdev->dev); |
David Brownell | 4bde4a4 | 2007-12-27 11:19:49 -0800 | [diff] [blame] | 610 | int i; |
| 611 | |
| 612 | if (pdata) { |
Nicolas Ferre | 0ee6d1e | 2012-03-21 16:53:09 +0100 | [diff] [blame] | 613 | at91_for_each_port(i) { |
Jean-Christophe PLAGNIOL-VILLARD | 8a7a49d | 2011-09-19 15:32:23 +0800 | [diff] [blame] | 614 | if (!gpio_is_valid(pdata->vbus_pin[i])) |
David Brownell | 4bde4a4 | 2007-12-27 11:19:49 -0800 | [diff] [blame] | 615 | continue; |
Thomas Petazzoni | aa6e52a | 2011-07-13 11:29:17 +0200 | [diff] [blame] | 616 | ohci_at91_usb_set_power(pdata, i, 0); |
David Brownell | 4bde4a4 | 2007-12-27 11:19:49 -0800 | [diff] [blame] | 617 | gpio_free(pdata->vbus_pin[i]); |
| 618 | } |
Thomas Petazzoni | aa6e52a | 2011-07-13 11:29:17 +0200 | [diff] [blame] | 619 | |
Nicolas Ferre | 0ee6d1e | 2012-03-21 16:53:09 +0100 | [diff] [blame] | 620 | at91_for_each_port(i) { |
Jean-Christophe PLAGNIOL-VILLARD | 8a7a49d | 2011-09-19 15:32:23 +0800 | [diff] [blame] | 621 | if (!gpio_is_valid(pdata->overcurrent_pin[i])) |
Thomas Petazzoni | aa6e52a | 2011-07-13 11:29:17 +0200 | [diff] [blame] | 622 | continue; |
| 623 | free_irq(gpio_to_irq(pdata->overcurrent_pin[i]), pdev); |
| 624 | gpio_free(pdata->overcurrent_pin[i]); |
| 625 | } |
David Brownell | 4bde4a4 | 2007-12-27 11:19:49 -0800 | [diff] [blame] | 626 | } |
| 627 | |
David Brownell | 0365ee0 | 2006-06-19 14:27:20 -0700 | [diff] [blame] | 628 | device_init_wakeup(&pdev->dev, 0); |
Pete Zaitcev | 421b4bf | 2008-06-01 14:38:43 -0700 | [diff] [blame] | 629 | usb_hcd_at91_remove(platform_get_drvdata(pdev), pdev); |
| 630 | return 0; |
Andrew Victor | 39a269c | 2006-01-22 10:32:13 -0800 | [diff] [blame] | 631 | } |
| 632 | |
| 633 | #ifdef CONFIG_PM |
Andrew Victor | 39a269c | 2006-01-22 10:32:13 -0800 | [diff] [blame] | 634 | |
David Brownell | 68ba61b | 2006-04-02 20:26:21 -0800 | [diff] [blame] | 635 | static int |
David Brownell | 0365ee0 | 2006-06-19 14:27:20 -0700 | [diff] [blame] | 636 | ohci_hcd_at91_drv_suspend(struct platform_device *pdev, pm_message_t mesg) |
David Brownell | 68ba61b | 2006-04-02 20:26:21 -0800 | [diff] [blame] | 637 | { |
David Brownell | 0365ee0 | 2006-06-19 14:27:20 -0700 | [diff] [blame] | 638 | struct usb_hcd *hcd = platform_get_drvdata(pdev); |
| 639 | struct ohci_hcd *ohci = hcd_to_ohci(hcd); |
Majunath Goudar | a9d3840 | 2013-11-13 17:40:17 +0530 | [diff] [blame] | 640 | bool do_wakeup = device_may_wakeup(&pdev->dev); |
| 641 | int ret; |
David Brownell | 0365ee0 | 2006-06-19 14:27:20 -0700 | [diff] [blame] | 642 | |
Majunath Goudar | a9d3840 | 2013-11-13 17:40:17 +0530 | [diff] [blame] | 643 | if (do_wakeup) |
David Brownell | 0365ee0 | 2006-06-19 14:27:20 -0700 | [diff] [blame] | 644 | enable_irq_wake(hcd->irq); |
David Brownell | 0365ee0 | 2006-06-19 14:27:20 -0700 | [diff] [blame] | 645 | |
Majunath Goudar | a9d3840 | 2013-11-13 17:40:17 +0530 | [diff] [blame] | 646 | ret = ohci_suspend(hcd, do_wakeup); |
| 647 | if (ret) { |
| 648 | disable_irq_wake(hcd->irq); |
| 649 | return ret; |
| 650 | } |
David Brownell | 0365ee0 | 2006-06-19 14:27:20 -0700 | [diff] [blame] | 651 | /* |
| 652 | * The integrated transceivers seem unable to notice disconnect, |
| 653 | * reconnect, or wakeup without the 48 MHz clock active. so for |
| 654 | * correctness, always discard connection state (using reset). |
| 655 | * |
| 656 | * REVISIT: some boards will be able to turn VBUS off... |
| 657 | */ |
| 658 | if (at91_suspend_entering_slow_clock()) { |
Manjunath Goudar | e3825b4 | 2013-09-21 16:38:42 +0530 | [diff] [blame] | 659 | ohci->hc_control = ohci_readl(ohci, &ohci->regs->control); |
| 660 | ohci->hc_control &= OHCI_CTRL_RWC; |
| 661 | ohci_writel(ohci, ohci->hc_control, &ohci->regs->control); |
| 662 | ohci->rh_state = OHCI_RH_HALTED; |
| 663 | |
Patrice Vilchez | 869aa98 | 2010-04-28 13:45:40 +0200 | [diff] [blame] | 664 | /* flush the writes */ |
| 665 | (void) ohci_readl (ohci, &ohci->regs->control); |
Andrew Victor | ed077bb | 2007-02-16 10:18:58 -0800 | [diff] [blame] | 666 | at91_stop_clock(); |
David Brownell | 0365ee0 | 2006-06-19 14:27:20 -0700 | [diff] [blame] | 667 | } |
Andrew Victor | 39a269c | 2006-01-22 10:32:13 -0800 | [diff] [blame] | 668 | |
Majunath Goudar | a9d3840 | 2013-11-13 17:40:17 +0530 | [diff] [blame] | 669 | return ret; |
Andrew Victor | 39a269c | 2006-01-22 10:32:13 -0800 | [diff] [blame] | 670 | } |
| 671 | |
David Brownell | 0365ee0 | 2006-06-19 14:27:20 -0700 | [diff] [blame] | 672 | static int ohci_hcd_at91_drv_resume(struct platform_device *pdev) |
Andrew Victor | 39a269c | 2006-01-22 10:32:13 -0800 | [diff] [blame] | 673 | { |
Marc Pignat | 6dde896 | 2007-01-09 14:00:11 -0800 | [diff] [blame] | 674 | struct usb_hcd *hcd = platform_get_drvdata(pdev); |
| 675 | |
| 676 | if (device_may_wakeup(&pdev->dev)) |
| 677 | disable_irq_wake(hcd->irq); |
| 678 | |
Andrew Victor | ed077bb | 2007-02-16 10:18:58 -0800 | [diff] [blame] | 679 | if (!clocked) |
| 680 | at91_start_clock(); |
Andrew Victor | 39a269c | 2006-01-22 10:32:13 -0800 | [diff] [blame] | 681 | |
Florian Fainelli | cfa49b4 | 2012-10-08 15:11:29 +0200 | [diff] [blame] | 682 | ohci_resume(hcd, false); |
Andrew Victor | 39a269c | 2006-01-22 10:32:13 -0800 | [diff] [blame] | 683 | return 0; |
| 684 | } |
| 685 | #else |
| 686 | #define ohci_hcd_at91_drv_suspend NULL |
| 687 | #define ohci_hcd_at91_drv_resume NULL |
| 688 | #endif |
| 689 | |
Andrew Victor | 39a269c | 2006-01-22 10:32:13 -0800 | [diff] [blame] | 690 | static struct platform_driver ohci_hcd_at91_driver = { |
| 691 | .probe = ohci_hcd_at91_drv_probe, |
Bill Pemberton | 7690417 | 2012-11-19 13:21:08 -0500 | [diff] [blame] | 692 | .remove = ohci_hcd_at91_drv_remove, |
Aleksey Gorelov | 64a21d0 | 2006-08-08 17:24:08 -0700 | [diff] [blame] | 693 | .shutdown = usb_hcd_platform_shutdown, |
Andrew Victor | 39a269c | 2006-01-22 10:32:13 -0800 | [diff] [blame] | 694 | .suspend = ohci_hcd_at91_drv_suspend, |
| 695 | .resume = ohci_hcd_at91_drv_resume, |
| 696 | .driver = { |
David Brownell | 0365ee0 | 2006-06-19 14:27:20 -0700 | [diff] [blame] | 697 | .name = "at91_ohci", |
Andrew Victor | 39a269c | 2006-01-22 10:32:13 -0800 | [diff] [blame] | 698 | .owner = THIS_MODULE, |
Jean-Christophe PLAGNIOL-VILLARD | 2419730 | 2011-11-21 06:55:18 +0800 | [diff] [blame] | 699 | .of_match_table = of_match_ptr(at91_ohci_dt_ids), |
Andrew Victor | 39a269c | 2006-01-22 10:32:13 -0800 | [diff] [blame] | 700 | }, |
| 701 | }; |
Manjunath Goudar | e3825b4 | 2013-09-21 16:38:42 +0530 | [diff] [blame] | 702 | |
| 703 | static int __init ohci_at91_init(void) |
| 704 | { |
| 705 | if (usb_disabled()) |
| 706 | return -ENODEV; |
| 707 | |
| 708 | pr_info("%s: " DRIVER_DESC "\n", hcd_name); |
| 709 | ohci_init_driver(&ohci_at91_hc_driver, NULL); |
| 710 | |
| 711 | /* |
| 712 | * The Atmel HW has some unusual quirks, which require Atmel-specific |
| 713 | * workarounds. We override certain hc_driver functions here to |
| 714 | * achieve that. We explicitly do not enhance ohci_driver_overrides to |
| 715 | * allow this more easily, since this is an unusual case, and we don't |
| 716 | * want to encourage others to override these functions by making it |
| 717 | * too easy. |
| 718 | */ |
| 719 | |
| 720 | orig_ohci_hub_control = ohci_at91_hc_driver.hub_control; |
| 721 | orig_ohci_hub_status_data = ohci_at91_hc_driver.hub_status_data; |
| 722 | |
| 723 | ohci_at91_hc_driver.hub_status_data = ohci_at91_hub_status_data; |
| 724 | ohci_at91_hc_driver.hub_control = ohci_at91_hub_control; |
| 725 | |
| 726 | return platform_driver_register(&ohci_hcd_at91_driver); |
| 727 | } |
| 728 | module_init(ohci_at91_init); |
| 729 | |
| 730 | static void __exit ohci_at91_cleanup(void) |
| 731 | { |
| 732 | platform_driver_unregister(&ohci_hcd_at91_driver); |
| 733 | } |
| 734 | module_exit(ohci_at91_cleanup); |
| 735 | |
| 736 | MODULE_DESCRIPTION(DRIVER_DESC); |
| 737 | MODULE_LICENSE("GPL"); |
| 738 | MODULE_ALIAS("platform:at91_ohci"); |