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 | |
David Brownell | 4bde4a4 | 2007-12-27 11:19:49 -0800 | [diff] [blame] | 27 | #include <asm/gpio.h> |
| 28 | |
Manjunath Goudar | e3825b4 | 2013-09-21 16:38:42 +0530 | [diff] [blame] | 29 | #include "ohci.h" |
Andrew Victor | 39a269c | 2006-01-22 10:32:13 -0800 | [diff] [blame] | 30 | |
Nicolas Ferre | 0ee6d1e | 2012-03-21 16:53:09 +0100 | [diff] [blame] | 31 | #define valid_port(index) ((index) >= 0 && (index) < AT91_MAX_USBH_PORTS) |
| 32 | #define at91_for_each_port(index) \ |
| 33 | for ((index) = 0; (index) < AT91_MAX_USBH_PORTS; (index)++) |
| 34 | |
Boris BREZILLON | 6b0a1cf | 2013-08-01 19:09:13 +0200 | [diff] [blame] | 35 | /* interface, function and usb clocks; sometimes also an AHB clock */ |
Sylvain Rochet | 1b20745 | 2015-01-20 14:39:02 +0100 | [diff] [blame] | 36 | #define hcd_to_ohci_at91_priv(h) \ |
| 37 | ((struct ohci_at91_priv *)hcd_to_ohci(h)->priv) |
| 38 | |
Alexandre Belloni | b4f1947 | 2015-08-10 16:23:09 +0200 | [diff] [blame] | 39 | #define AT91_MAX_USBH_PORTS 3 |
| 40 | struct at91_usbh_data { |
| 41 | int vbus_pin[AT91_MAX_USBH_PORTS]; /* port power-control pin */ |
| 42 | int overcurrent_pin[AT91_MAX_USBH_PORTS]; |
| 43 | u8 ports; /* number of ports on root hub */ |
| 44 | u8 overcurrent_supported; |
| 45 | u8 vbus_pin_active_low[AT91_MAX_USBH_PORTS]; |
| 46 | u8 overcurrent_status[AT91_MAX_USBH_PORTS]; |
| 47 | u8 overcurrent_changed[AT91_MAX_USBH_PORTS]; |
| 48 | }; |
| 49 | |
Sylvain Rochet | 1b20745 | 2015-01-20 14:39:02 +0100 | [diff] [blame] | 50 | struct ohci_at91_priv { |
| 51 | struct clk *iclk; |
| 52 | struct clk *fclk; |
Sylvain Rochet | 1b20745 | 2015-01-20 14:39:02 +0100 | [diff] [blame] | 53 | struct clk *hclk; |
| 54 | bool clocked; |
Sylvain Rochet | 1cee6b8 | 2015-01-20 14:39:04 +0100 | [diff] [blame] | 55 | bool wakeup; /* Saved wake-up state for resume */ |
Sylvain Rochet | 1b20745 | 2015-01-20 14:39:02 +0100 | [diff] [blame] | 56 | }; |
Manjunath Goudar | e3825b4 | 2013-09-21 16:38:42 +0530 | [diff] [blame] | 57 | /* interface and function clocks; sometimes also an AHB clock */ |
| 58 | |
| 59 | #define DRIVER_DESC "OHCI Atmel driver" |
| 60 | |
| 61 | static const char hcd_name[] = "ohci-atmel"; |
| 62 | |
| 63 | static struct hc_driver __read_mostly ohci_at91_hc_driver; |
Sylvain Rochet | 1b20745 | 2015-01-20 14:39:02 +0100 | [diff] [blame] | 64 | |
| 65 | static const struct ohci_driver_overrides ohci_at91_drv_overrides __initconst = { |
| 66 | .extra_priv_size = sizeof(struct ohci_at91_priv), |
| 67 | }; |
Andrew Victor | 39a269c | 2006-01-22 10:32:13 -0800 | [diff] [blame] | 68 | |
| 69 | extern int usb_disabled(void); |
| 70 | |
| 71 | /*-------------------------------------------------------------------------*/ |
| 72 | |
Sylvain Rochet | 1b20745 | 2015-01-20 14:39:02 +0100 | [diff] [blame] | 73 | static void at91_start_clock(struct ohci_at91_priv *ohci_at91) |
Andrew Victor | ed077bb | 2007-02-16 10:18:58 -0800 | [diff] [blame] | 74 | { |
Sylvain Rochet | 1cee6b8 | 2015-01-20 14:39:04 +0100 | [diff] [blame] | 75 | if (ohci_at91->clocked) |
| 76 | return; |
Boris Brezillon | 963719c | 2015-03-17 17:15:47 +0100 | [diff] [blame] | 77 | |
| 78 | clk_set_rate(ohci_at91->fclk, 48000000); |
Sylvain Rochet | 1b20745 | 2015-01-20 14:39:02 +0100 | [diff] [blame] | 79 | clk_prepare_enable(ohci_at91->hclk); |
| 80 | clk_prepare_enable(ohci_at91->iclk); |
| 81 | clk_prepare_enable(ohci_at91->fclk); |
| 82 | ohci_at91->clocked = true; |
Andrew Victor | ed077bb | 2007-02-16 10:18:58 -0800 | [diff] [blame] | 83 | } |
| 84 | |
Sylvain Rochet | 1b20745 | 2015-01-20 14:39:02 +0100 | [diff] [blame] | 85 | static void at91_stop_clock(struct ohci_at91_priv *ohci_at91) |
Andrew Victor | ed077bb | 2007-02-16 10:18:58 -0800 | [diff] [blame] | 86 | { |
Sylvain Rochet | 1cee6b8 | 2015-01-20 14:39:04 +0100 | [diff] [blame] | 87 | if (!ohci_at91->clocked) |
| 88 | return; |
Boris Brezillon | 963719c | 2015-03-17 17:15:47 +0100 | [diff] [blame] | 89 | |
Sylvain Rochet | 1b20745 | 2015-01-20 14:39:02 +0100 | [diff] [blame] | 90 | clk_disable_unprepare(ohci_at91->fclk); |
| 91 | clk_disable_unprepare(ohci_at91->iclk); |
| 92 | clk_disable_unprepare(ohci_at91->hclk); |
Sylvain Rochet | 1b20745 | 2015-01-20 14:39:02 +0100 | [diff] [blame] | 93 | ohci_at91->clocked = false; |
Andrew Victor | ed077bb | 2007-02-16 10:18:58 -0800 | [diff] [blame] | 94 | } |
| 95 | |
Andrew Victor | 39a269c | 2006-01-22 10:32:13 -0800 | [diff] [blame] | 96 | static void at91_start_hc(struct platform_device *pdev) |
| 97 | { |
| 98 | struct usb_hcd *hcd = platform_get_drvdata(pdev); |
| 99 | struct ohci_regs __iomem *regs = hcd->regs; |
Sylvain Rochet | 1b20745 | 2015-01-20 14:39:02 +0100 | [diff] [blame] | 100 | struct ohci_at91_priv *ohci_at91 = hcd_to_ohci_at91_priv(hcd); |
Andrew Victor | 39a269c | 2006-01-22 10:32:13 -0800 | [diff] [blame] | 101 | |
David Brownell | 0365ee0 | 2006-06-19 14:27:20 -0700 | [diff] [blame] | 102 | dev_dbg(&pdev->dev, "start\n"); |
Andrew Victor | 39a269c | 2006-01-22 10:32:13 -0800 | [diff] [blame] | 103 | |
| 104 | /* |
| 105 | * Start the USB clocks. |
| 106 | */ |
Sylvain Rochet | 1b20745 | 2015-01-20 14:39:02 +0100 | [diff] [blame] | 107 | at91_start_clock(ohci_at91); |
Andrew Victor | 39a269c | 2006-01-22 10:32:13 -0800 | [diff] [blame] | 108 | |
| 109 | /* |
| 110 | * The USB host controller must remain in reset. |
| 111 | */ |
| 112 | writel(0, ®s->control); |
| 113 | } |
| 114 | |
| 115 | static void at91_stop_hc(struct platform_device *pdev) |
| 116 | { |
| 117 | struct usb_hcd *hcd = platform_get_drvdata(pdev); |
| 118 | struct ohci_regs __iomem *regs = hcd->regs; |
Sylvain Rochet | 1b20745 | 2015-01-20 14:39:02 +0100 | [diff] [blame] | 119 | struct ohci_at91_priv *ohci_at91 = hcd_to_ohci_at91_priv(hcd); |
Andrew Victor | 39a269c | 2006-01-22 10:32:13 -0800 | [diff] [blame] | 120 | |
David Brownell | 0365ee0 | 2006-06-19 14:27:20 -0700 | [diff] [blame] | 121 | dev_dbg(&pdev->dev, "stop\n"); |
Andrew Victor | 39a269c | 2006-01-22 10:32:13 -0800 | [diff] [blame] | 122 | |
| 123 | /* |
| 124 | * Put the USB host controller into reset. |
| 125 | */ |
| 126 | writel(0, ®s->control); |
| 127 | |
| 128 | /* |
| 129 | * Stop the USB clocks. |
| 130 | */ |
Sylvain Rochet | 1b20745 | 2015-01-20 14:39:02 +0100 | [diff] [blame] | 131 | at91_stop_clock(ohci_at91); |
Andrew Victor | 39a269c | 2006-01-22 10:32:13 -0800 | [diff] [blame] | 132 | } |
| 133 | |
| 134 | |
| 135 | /*-------------------------------------------------------------------------*/ |
| 136 | |
Bill Pemberton | fb4e98a | 2012-11-19 13:26:20 -0500 | [diff] [blame] | 137 | static void usb_hcd_at91_remove (struct usb_hcd *, struct platform_device *); |
Andrew Victor | 39a269c | 2006-01-22 10:32:13 -0800 | [diff] [blame] | 138 | |
| 139 | /* configure so an HC device and id are always provided */ |
| 140 | /* always called with process context; sleeping is OK */ |
| 141 | |
| 142 | |
| 143 | /** |
David Brownell | 0365ee0 | 2006-06-19 14:27:20 -0700 | [diff] [blame] | 144 | * usb_hcd_at91_probe - initialize AT91-based HCDs |
Andrew Victor | 39a269c | 2006-01-22 10:32:13 -0800 | [diff] [blame] | 145 | * Context: !in_interrupt() |
| 146 | * |
| 147 | * Allocates basic resources for this USB host controller, and |
| 148 | * then invokes the start() method for the HCD associated with it |
| 149 | * through the hotplug entry's driver_data. |
Andrew Victor | 39a269c | 2006-01-22 10:32:13 -0800 | [diff] [blame] | 150 | */ |
Bill Pemberton | 41ac7b3 | 2012-11-19 13:21:48 -0500 | [diff] [blame] | 151 | static int usb_hcd_at91_probe(const struct hc_driver *driver, |
David Brownell | 0365ee0 | 2006-06-19 14:27:20 -0700 | [diff] [blame] | 152 | struct platform_device *pdev) |
Andrew Victor | 39a269c | 2006-01-22 10:32:13 -0800 | [diff] [blame] | 153 | { |
Manjunath Goudar | e3825b4 | 2013-09-21 16:38:42 +0530 | [diff] [blame] | 154 | struct at91_usbh_data *board; |
| 155 | struct ohci_hcd *ohci; |
Andrew Victor | 39a269c | 2006-01-22 10:32:13 -0800 | [diff] [blame] | 156 | int retval; |
Sylvain Rochet | 3b3394a | 2015-01-20 14:39:03 +0100 | [diff] [blame] | 157 | struct usb_hcd *hcd; |
Sylvain Rochet | 1b20745 | 2015-01-20 14:39:02 +0100 | [diff] [blame] | 158 | struct ohci_at91_priv *ohci_at91; |
Boris BREZILLON | fb5f183 | 2013-12-08 15:59:59 +0100 | [diff] [blame] | 159 | struct device *dev = &pdev->dev; |
| 160 | struct resource *res; |
| 161 | int irq; |
Andrew Victor | 39a269c | 2006-01-22 10:32:13 -0800 | [diff] [blame] | 162 | |
Boris BREZILLON | fb5f183 | 2013-12-08 15:59:59 +0100 | [diff] [blame] | 163 | irq = platform_get_irq(pdev, 0); |
| 164 | if (irq < 0) { |
| 165 | dev_dbg(dev, "hcd probe: missing irq resource\n"); |
| 166 | return irq; |
Andrew Victor | 39a269c | 2006-01-22 10:32:13 -0800 | [diff] [blame] | 167 | } |
| 168 | |
Boris BREZILLON | 5b218a0 | 2013-12-09 09:51:54 +0100 | [diff] [blame] | 169 | hcd = usb_create_hcd(driver, dev, "at91"); |
Andrew Victor | 39a269c | 2006-01-22 10:32:13 -0800 | [diff] [blame] | 170 | if (!hcd) |
| 171 | return -ENOMEM; |
Sylvain Rochet | 1b20745 | 2015-01-20 14:39:02 +0100 | [diff] [blame] | 172 | ohci_at91 = hcd_to_ohci_at91_priv(hcd); |
Andrew Victor | 39a269c | 2006-01-22 10:32:13 -0800 | [diff] [blame] | 173 | |
Varka Bhadram | 04dc315 | 2014-11-04 07:51:12 +0530 | [diff] [blame] | 174 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
Boris BREZILLON | cca2bbb | 2013-12-09 09:51:53 +0100 | [diff] [blame] | 175 | hcd->regs = devm_ioremap_resource(dev, res); |
| 176 | if (IS_ERR(hcd->regs)) { |
| 177 | retval = PTR_ERR(hcd->regs); |
| 178 | goto err; |
Andrew Victor | 39a269c | 2006-01-22 10:32:13 -0800 | [diff] [blame] | 179 | } |
Varka Bhadram | 04dc315 | 2014-11-04 07:51:12 +0530 | [diff] [blame] | 180 | hcd->rsrc_start = res->start; |
| 181 | hcd->rsrc_len = resource_size(res); |
Andrew Victor | 39a269c | 2006-01-22 10:32:13 -0800 | [diff] [blame] | 182 | |
Sylvain Rochet | 1b20745 | 2015-01-20 14:39:02 +0100 | [diff] [blame] | 183 | ohci_at91->iclk = devm_clk_get(dev, "ohci_clk"); |
| 184 | if (IS_ERR(ohci_at91->iclk)) { |
Boris BREZILLON | 5b218a0 | 2013-12-09 09:51:54 +0100 | [diff] [blame] | 185 | dev_err(dev, "failed to get ohci_clk\n"); |
Sylvain Rochet | 1b20745 | 2015-01-20 14:39:02 +0100 | [diff] [blame] | 186 | retval = PTR_ERR(ohci_at91->iclk); |
Boris BREZILLON | cca2bbb | 2013-12-09 09:51:53 +0100 | [diff] [blame] | 187 | goto err; |
Jean-Christophe PLAGNIOL-VILLARD | 6813463 | 2011-12-08 16:32:00 +0100 | [diff] [blame] | 188 | } |
Sylvain Rochet | 1b20745 | 2015-01-20 14:39:02 +0100 | [diff] [blame] | 189 | ohci_at91->fclk = devm_clk_get(dev, "uhpck"); |
| 190 | if (IS_ERR(ohci_at91->fclk)) { |
Boris BREZILLON | 5b218a0 | 2013-12-09 09:51:54 +0100 | [diff] [blame] | 191 | dev_err(dev, "failed to get uhpck\n"); |
Sylvain Rochet | 1b20745 | 2015-01-20 14:39:02 +0100 | [diff] [blame] | 192 | retval = PTR_ERR(ohci_at91->fclk); |
Boris BREZILLON | fc7a325 | 2013-12-09 09:51:55 +0100 | [diff] [blame] | 193 | goto err; |
Jean-Christophe PLAGNIOL-VILLARD | 6813463 | 2011-12-08 16:32:00 +0100 | [diff] [blame] | 194 | } |
Sylvain Rochet | 1b20745 | 2015-01-20 14:39:02 +0100 | [diff] [blame] | 195 | ohci_at91->hclk = devm_clk_get(dev, "hclk"); |
| 196 | if (IS_ERR(ohci_at91->hclk)) { |
Boris BREZILLON | 5b218a0 | 2013-12-09 09:51:54 +0100 | [diff] [blame] | 197 | dev_err(dev, "failed to get hclk\n"); |
Sylvain Rochet | 1b20745 | 2015-01-20 14:39:02 +0100 | [diff] [blame] | 198 | retval = PTR_ERR(ohci_at91->hclk); |
Boris BREZILLON | fc7a325 | 2013-12-09 09:51:55 +0100 | [diff] [blame] | 199 | goto err; |
Jean-Christophe PLAGNIOL-VILLARD | 6813463 | 2011-12-08 16:32:00 +0100 | [diff] [blame] | 200 | } |
Andrew Victor | 39a269c | 2006-01-22 10:32:13 -0800 | [diff] [blame] | 201 | |
Manjunath Goudar | e3825b4 | 2013-09-21 16:38:42 +0530 | [diff] [blame] | 202 | board = hcd->self.controller->platform_data; |
| 203 | ohci = hcd_to_ohci(hcd); |
| 204 | ohci->num_ports = board->ports; |
Andrew Victor | 39a269c | 2006-01-22 10:32:13 -0800 | [diff] [blame] | 205 | at91_start_hc(pdev); |
Andrew Victor | 39a269c | 2006-01-22 10:32:13 -0800 | [diff] [blame] | 206 | |
Boris BREZILLON | fb5f183 | 2013-12-08 15:59:59 +0100 | [diff] [blame] | 207 | retval = usb_add_hcd(hcd, irq, IRQF_SHARED); |
Arnd Bergmann | 1f53b48 | 2014-01-07 12:54:58 +0100 | [diff] [blame] | 208 | if (retval == 0) { |
Peter Chen | 3c9740a | 2013-11-05 10:46:02 +0800 | [diff] [blame] | 209 | device_wakeup_enable(hcd->self.controller); |
Andrew Victor | 39a269c | 2006-01-22 10:32:13 -0800 | [diff] [blame] | 210 | return retval; |
Peter Chen | 3c9740a | 2013-11-05 10:46:02 +0800 | [diff] [blame] | 211 | } |
Andrew Victor | 39a269c | 2006-01-22 10:32:13 -0800 | [diff] [blame] | 212 | |
| 213 | /* Error handling */ |
| 214 | at91_stop_hc(pdev); |
| 215 | |
Boris BREZILLON | cca2bbb | 2013-12-09 09:51:53 +0100 | [diff] [blame] | 216 | err: |
Andrew Victor | 39a269c | 2006-01-22 10:32:13 -0800 | [diff] [blame] | 217 | usb_put_hcd(hcd); |
| 218 | return retval; |
| 219 | } |
| 220 | |
| 221 | |
Andrew Victor | 39a269c | 2006-01-22 10:32:13 -0800 | [diff] [blame] | 222 | /* may be called with controller, bus, and devices active */ |
| 223 | |
| 224 | /** |
David Brownell | 0365ee0 | 2006-06-19 14:27:20 -0700 | [diff] [blame] | 225 | * usb_hcd_at91_remove - shutdown processing for AT91-based HCDs |
Andrew Victor | 39a269c | 2006-01-22 10:32:13 -0800 | [diff] [blame] | 226 | * @dev: USB Host Controller being removed |
| 227 | * Context: !in_interrupt() |
| 228 | * |
| 229 | * Reverses the effect of usb_hcd_at91_probe(), first invoking |
| 230 | * the HCD's stop() method. It is always called from a thread |
David Brownell | 0365ee0 | 2006-06-19 14:27:20 -0700 | [diff] [blame] | 231 | * context, "rmmod" or something similar. |
Andrew Victor | 39a269c | 2006-01-22 10:32:13 -0800 | [diff] [blame] | 232 | * |
| 233 | */ |
Bill Pemberton | fb4e98a | 2012-11-19 13:26:20 -0500 | [diff] [blame] | 234 | static void usb_hcd_at91_remove(struct usb_hcd *hcd, |
David Brownell | 0365ee0 | 2006-06-19 14:27:20 -0700 | [diff] [blame] | 235 | struct platform_device *pdev) |
Andrew Victor | 39a269c | 2006-01-22 10:32:13 -0800 | [diff] [blame] | 236 | { |
| 237 | usb_remove_hcd(hcd); |
| 238 | at91_stop_hc(pdev); |
Pete Zaitcev | 421b4bf | 2008-06-01 14:38:43 -0700 | [diff] [blame] | 239 | usb_put_hcd(hcd); |
Andrew Victor | 39a269c | 2006-01-22 10:32:13 -0800 | [diff] [blame] | 240 | } |
| 241 | |
| 242 | /*-------------------------------------------------------------------------*/ |
Thomas Petazzoni | aa6e52a | 2011-07-13 11:29:17 +0200 | [diff] [blame] | 243 | static void ohci_at91_usb_set_power(struct at91_usbh_data *pdata, int port, int enable) |
| 244 | { |
Nicolas Ferre | 0ee6d1e | 2012-03-21 16:53:09 +0100 | [diff] [blame] | 245 | if (!valid_port(port)) |
Thomas Petazzoni | aa6e52a | 2011-07-13 11:29:17 +0200 | [diff] [blame] | 246 | return; |
| 247 | |
Jean-Christophe PLAGNIOL-VILLARD | 8a7a49d | 2011-09-19 15:32:23 +0800 | [diff] [blame] | 248 | if (!gpio_is_valid(pdata->vbus_pin[port])) |
Jean-Christophe PLAGNIOL-VILLARD | 770f0ba | 2011-11-12 16:46:13 +0100 | [diff] [blame] | 249 | return; |
| 250 | |
Jean-Christophe PLAGNIOL-VILLARD | 8134ff5 | 2011-12-08 16:32:01 +0100 | [diff] [blame] | 251 | gpio_set_value(pdata->vbus_pin[port], |
Nicolas Ferre | 1e7caf8 | 2012-03-21 14:38:55 +0100 | [diff] [blame] | 252 | pdata->vbus_pin_active_low[port] ^ enable); |
Thomas Petazzoni | aa6e52a | 2011-07-13 11:29:17 +0200 | [diff] [blame] | 253 | } |
| 254 | |
| 255 | static int ohci_at91_usb_get_power(struct at91_usbh_data *pdata, int port) |
| 256 | { |
Nicolas Ferre | 0ee6d1e | 2012-03-21 16:53:09 +0100 | [diff] [blame] | 257 | if (!valid_port(port)) |
Thomas Petazzoni | aa6e52a | 2011-07-13 11:29:17 +0200 | [diff] [blame] | 258 | return -EINVAL; |
| 259 | |
Jean-Christophe PLAGNIOL-VILLARD | 8a7a49d | 2011-09-19 15:32:23 +0800 | [diff] [blame] | 260 | if (!gpio_is_valid(pdata->vbus_pin[port])) |
Jean-Christophe PLAGNIOL-VILLARD | 770f0ba | 2011-11-12 16:46:13 +0100 | [diff] [blame] | 261 | return -EINVAL; |
| 262 | |
Jean-Christophe PLAGNIOL-VILLARD | 8134ff5 | 2011-12-08 16:32:01 +0100 | [diff] [blame] | 263 | return gpio_get_value(pdata->vbus_pin[port]) ^ |
Nicolas Ferre | 1e7caf8 | 2012-03-21 14:38:55 +0100 | [diff] [blame] | 264 | pdata->vbus_pin_active_low[port]; |
Thomas Petazzoni | aa6e52a | 2011-07-13 11:29:17 +0200 | [diff] [blame] | 265 | } |
| 266 | |
| 267 | /* |
| 268 | * Update the status data from the hub with the over-current indicator change. |
| 269 | */ |
| 270 | static int ohci_at91_hub_status_data(struct usb_hcd *hcd, char *buf) |
| 271 | { |
Manjunath Goudar | e3825b4 | 2013-09-21 16:38:42 +0530 | [diff] [blame] | 272 | struct at91_usbh_data *pdata = hcd->self.controller->platform_data; |
Laurent Pinchart | 42b59eb | 2014-04-16 18:00:09 +0200 | [diff] [blame] | 273 | int length = ohci_hub_status_data(hcd, buf); |
Thomas Petazzoni | aa6e52a | 2011-07-13 11:29:17 +0200 | [diff] [blame] | 274 | int port; |
| 275 | |
Nicolas Ferre | 0ee6d1e | 2012-03-21 16:53:09 +0100 | [diff] [blame] | 276 | at91_for_each_port(port) { |
Thomas Petazzoni | aa6e52a | 2011-07-13 11:29:17 +0200 | [diff] [blame] | 277 | if (pdata->overcurrent_changed[port]) { |
Nicolas Ferre | 0ee6d1e | 2012-03-21 16:53:09 +0100 | [diff] [blame] | 278 | if (!length) |
Thomas Petazzoni | aa6e52a | 2011-07-13 11:29:17 +0200 | [diff] [blame] | 279 | length = 1; |
| 280 | buf[0] |= 1 << (port + 1); |
| 281 | } |
| 282 | } |
| 283 | |
| 284 | return length; |
| 285 | } |
| 286 | |
| 287 | /* |
| 288 | * Look at the control requests to the root hub and see if we need to override. |
| 289 | */ |
| 290 | static int ohci_at91_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue, |
| 291 | u16 wIndex, char *buf, u16 wLength) |
| 292 | { |
Jingoo Han | d4f09e2 | 2013-07-30 19:59:40 +0900 | [diff] [blame] | 293 | struct at91_usbh_data *pdata = dev_get_platdata(hcd->self.controller); |
Thomas Petazzoni | aa6e52a | 2011-07-13 11:29:17 +0200 | [diff] [blame] | 294 | struct usb_hub_descriptor *desc; |
| 295 | int ret = -EINVAL; |
| 296 | u32 *data = (u32 *)buf; |
| 297 | |
| 298 | dev_dbg(hcd->self.controller, |
| 299 | "ohci_at91_hub_control(%p,0x%04x,0x%04x,0x%04x,%p,%04x)\n", |
| 300 | hcd, typeReq, wValue, wIndex, buf, wLength); |
| 301 | |
Nicolas Ferre | 0ee6d1e | 2012-03-21 16:53:09 +0100 | [diff] [blame] | 302 | wIndex--; |
| 303 | |
Thomas Petazzoni | aa6e52a | 2011-07-13 11:29:17 +0200 | [diff] [blame] | 304 | switch (typeReq) { |
| 305 | case SetPortFeature: |
| 306 | if (wValue == USB_PORT_FEAT_POWER) { |
| 307 | dev_dbg(hcd->self.controller, "SetPortFeat: POWER\n"); |
Nicolas Ferre | 0ee6d1e | 2012-03-21 16:53:09 +0100 | [diff] [blame] | 308 | if (valid_port(wIndex)) { |
| 309 | ohci_at91_usb_set_power(pdata, wIndex, 1); |
| 310 | ret = 0; |
| 311 | } |
| 312 | |
Thomas Petazzoni | aa6e52a | 2011-07-13 11:29:17 +0200 | [diff] [blame] | 313 | goto out; |
| 314 | } |
| 315 | break; |
| 316 | |
| 317 | case ClearPortFeature: |
| 318 | switch (wValue) { |
| 319 | case USB_PORT_FEAT_C_OVER_CURRENT: |
| 320 | dev_dbg(hcd->self.controller, |
| 321 | "ClearPortFeature: C_OVER_CURRENT\n"); |
| 322 | |
Nicolas Ferre | 0ee6d1e | 2012-03-21 16:53:09 +0100 | [diff] [blame] | 323 | if (valid_port(wIndex)) { |
| 324 | pdata->overcurrent_changed[wIndex] = 0; |
| 325 | pdata->overcurrent_status[wIndex] = 0; |
Thomas Petazzoni | aa6e52a | 2011-07-13 11:29:17 +0200 | [diff] [blame] | 326 | } |
| 327 | |
| 328 | goto out; |
| 329 | |
| 330 | case USB_PORT_FEAT_OVER_CURRENT: |
| 331 | dev_dbg(hcd->self.controller, |
| 332 | "ClearPortFeature: OVER_CURRENT\n"); |
| 333 | |
Nicolas Ferre | 0ee6d1e | 2012-03-21 16:53:09 +0100 | [diff] [blame] | 334 | if (valid_port(wIndex)) |
| 335 | pdata->overcurrent_status[wIndex] = 0; |
Thomas Petazzoni | aa6e52a | 2011-07-13 11:29:17 +0200 | [diff] [blame] | 336 | |
| 337 | goto out; |
| 338 | |
| 339 | case USB_PORT_FEAT_POWER: |
| 340 | dev_dbg(hcd->self.controller, |
| 341 | "ClearPortFeature: POWER\n"); |
| 342 | |
Nicolas Ferre | 0ee6d1e | 2012-03-21 16:53:09 +0100 | [diff] [blame] | 343 | if (valid_port(wIndex)) { |
| 344 | ohci_at91_usb_set_power(pdata, wIndex, 0); |
Thomas Petazzoni | aa6e52a | 2011-07-13 11:29:17 +0200 | [diff] [blame] | 345 | return 0; |
| 346 | } |
| 347 | } |
| 348 | break; |
| 349 | } |
| 350 | |
Laurent Pinchart | 42b59eb | 2014-04-16 18:00:09 +0200 | [diff] [blame] | 351 | ret = ohci_hub_control(hcd, typeReq, wValue, wIndex + 1, buf, wLength); |
Thomas Petazzoni | aa6e52a | 2011-07-13 11:29:17 +0200 | [diff] [blame] | 352 | if (ret) |
| 353 | goto out; |
| 354 | |
| 355 | switch (typeReq) { |
| 356 | case GetHubDescriptor: |
| 357 | |
| 358 | /* update the hub's descriptor */ |
| 359 | |
| 360 | desc = (struct usb_hub_descriptor *)buf; |
| 361 | |
| 362 | dev_dbg(hcd->self.controller, "wHubCharacteristics 0x%04x\n", |
| 363 | desc->wHubCharacteristics); |
| 364 | |
| 365 | /* remove the old configurations for power-switching, and |
| 366 | * over-current protection, and insert our new configuration |
| 367 | */ |
| 368 | |
| 369 | desc->wHubCharacteristics &= ~cpu_to_le16(HUB_CHAR_LPSM); |
Sergei Shtylyov | a9c49bc | 2015-01-19 01:39:44 +0300 | [diff] [blame] | 370 | desc->wHubCharacteristics |= |
| 371 | cpu_to_le16(HUB_CHAR_INDV_PORT_LPSM); |
Thomas Petazzoni | aa6e52a | 2011-07-13 11:29:17 +0200 | [diff] [blame] | 372 | |
| 373 | if (pdata->overcurrent_supported) { |
| 374 | desc->wHubCharacteristics &= ~cpu_to_le16(HUB_CHAR_OCPM); |
Sergei Shtylyov | a9c49bc | 2015-01-19 01:39:44 +0300 | [diff] [blame] | 375 | desc->wHubCharacteristics |= |
| 376 | cpu_to_le16(HUB_CHAR_INDV_PORT_OCPM); |
Thomas Petazzoni | aa6e52a | 2011-07-13 11:29:17 +0200 | [diff] [blame] | 377 | } |
| 378 | |
| 379 | dev_dbg(hcd->self.controller, "wHubCharacteristics after 0x%04x\n", |
| 380 | desc->wHubCharacteristics); |
| 381 | |
| 382 | return ret; |
| 383 | |
| 384 | case GetPortStatus: |
| 385 | /* check port status */ |
| 386 | |
| 387 | dev_dbg(hcd->self.controller, "GetPortStatus(%d)\n", wIndex); |
| 388 | |
Nicolas Ferre | 0ee6d1e | 2012-03-21 16:53:09 +0100 | [diff] [blame] | 389 | if (valid_port(wIndex)) { |
| 390 | if (!ohci_at91_usb_get_power(pdata, wIndex)) |
Thomas Petazzoni | aa6e52a | 2011-07-13 11:29:17 +0200 | [diff] [blame] | 391 | *data &= ~cpu_to_le32(RH_PS_PPS); |
Thomas Petazzoni | aa6e52a | 2011-07-13 11:29:17 +0200 | [diff] [blame] | 392 | |
Nicolas Ferre | 0ee6d1e | 2012-03-21 16:53:09 +0100 | [diff] [blame] | 393 | if (pdata->overcurrent_changed[wIndex]) |
Thomas Petazzoni | aa6e52a | 2011-07-13 11:29:17 +0200 | [diff] [blame] | 394 | *data |= cpu_to_le32(RH_PS_OCIC); |
Thomas Petazzoni | aa6e52a | 2011-07-13 11:29:17 +0200 | [diff] [blame] | 395 | |
Nicolas Ferre | 0ee6d1e | 2012-03-21 16:53:09 +0100 | [diff] [blame] | 396 | if (pdata->overcurrent_status[wIndex]) |
Thomas Petazzoni | aa6e52a | 2011-07-13 11:29:17 +0200 | [diff] [blame] | 397 | *data |= cpu_to_le32(RH_PS_POCI); |
Thomas Petazzoni | aa6e52a | 2011-07-13 11:29:17 +0200 | [diff] [blame] | 398 | } |
| 399 | } |
| 400 | |
| 401 | out: |
| 402 | return ret; |
| 403 | } |
| 404 | |
Andrew Victor | 39a269c | 2006-01-22 10:32:13 -0800 | [diff] [blame] | 405 | /*-------------------------------------------------------------------------*/ |
| 406 | |
Thomas Petazzoni | aa6e52a | 2011-07-13 11:29:17 +0200 | [diff] [blame] | 407 | static irqreturn_t ohci_hcd_at91_overcurrent_irq(int irq, void *data) |
| 408 | { |
| 409 | struct platform_device *pdev = data; |
Jingoo Han | d4f09e2 | 2013-07-30 19:59:40 +0900 | [diff] [blame] | 410 | struct at91_usbh_data *pdata = dev_get_platdata(&pdev->dev); |
Thomas Petazzoni | aa6e52a | 2011-07-13 11:29:17 +0200 | [diff] [blame] | 411 | int val, gpio, port; |
| 412 | |
| 413 | /* From the GPIO notifying the over-current situation, find |
| 414 | * out the corresponding port */ |
Nicolas Ferre | 0ee6d1e | 2012-03-21 16:53:09 +0100 | [diff] [blame] | 415 | at91_for_each_port(port) { |
Joachim Eastwood | 01bb650 | 2012-09-23 22:56:00 +0200 | [diff] [blame] | 416 | if (gpio_is_valid(pdata->overcurrent_pin[port]) && |
| 417 | gpio_to_irq(pdata->overcurrent_pin[port]) == irq) { |
Nicolas Ferre | e449907 | 2012-02-11 14:23:06 +0100 | [diff] [blame] | 418 | gpio = pdata->overcurrent_pin[port]; |
Thomas Petazzoni | aa6e52a | 2011-07-13 11:29:17 +0200 | [diff] [blame] | 419 | break; |
Nicolas Ferre | e449907 | 2012-02-11 14:23:06 +0100 | [diff] [blame] | 420 | } |
Thomas Petazzoni | aa6e52a | 2011-07-13 11:29:17 +0200 | [diff] [blame] | 421 | } |
| 422 | |
Nicolas Ferre | 0ee6d1e | 2012-03-21 16:53:09 +0100 | [diff] [blame] | 423 | if (port == AT91_MAX_USBH_PORTS) { |
Thomas Petazzoni | aa6e52a | 2011-07-13 11:29:17 +0200 | [diff] [blame] | 424 | dev_err(& pdev->dev, "overcurrent interrupt from unknown GPIO\n"); |
| 425 | return IRQ_HANDLED; |
| 426 | } |
| 427 | |
| 428 | val = gpio_get_value(gpio); |
| 429 | |
| 430 | /* When notified of an over-current situation, disable power |
| 431 | on the corresponding port, and mark this port in |
| 432 | over-current. */ |
Nicolas Ferre | 0ee6d1e | 2012-03-21 16:53:09 +0100 | [diff] [blame] | 433 | if (!val) { |
Thomas Petazzoni | aa6e52a | 2011-07-13 11:29:17 +0200 | [diff] [blame] | 434 | ohci_at91_usb_set_power(pdata, port, 0); |
| 435 | pdata->overcurrent_status[port] = 1; |
| 436 | pdata->overcurrent_changed[port] = 1; |
| 437 | } |
| 438 | |
| 439 | dev_dbg(& pdev->dev, "overcurrent situation %s\n", |
| 440 | val ? "exited" : "notified"); |
| 441 | |
| 442 | return IRQ_HANDLED; |
| 443 | } |
| 444 | |
Jean-Christophe PLAGNIOL-VILLARD | 2419730 | 2011-11-21 06:55:18 +0800 | [diff] [blame] | 445 | static const struct of_device_id at91_ohci_dt_ids[] = { |
| 446 | { .compatible = "atmel,at91rm9200-ohci" }, |
| 447 | { /* sentinel */ } |
| 448 | }; |
| 449 | |
| 450 | MODULE_DEVICE_TABLE(of, at91_ohci_dt_ids); |
| 451 | |
Alexandre Belloni | bd73bfc | 2015-08-10 16:23:11 +0200 | [diff] [blame] | 452 | /*-------------------------------------------------------------------------*/ |
| 453 | |
| 454 | static int ohci_hcd_at91_drv_probe(struct platform_device *pdev) |
Jean-Christophe PLAGNIOL-VILLARD | 2419730 | 2011-11-21 06:55:18 +0800 | [diff] [blame] | 455 | { |
| 456 | struct device_node *np = pdev->dev.of_node; |
Jean-Christophe PLAGNIOL-VILLARD | 2419730 | 2011-11-21 06:55:18 +0800 | [diff] [blame] | 457 | struct at91_usbh_data *pdata; |
Alexandre Belloni | bd73bfc | 2015-08-10 16:23:11 +0200 | [diff] [blame] | 458 | int i; |
| 459 | int gpio; |
| 460 | int ret; |
| 461 | enum of_gpio_flags flags; |
| 462 | u32 ports; |
Jean-Christophe PLAGNIOL-VILLARD | 2419730 | 2011-11-21 06:55:18 +0800 | [diff] [blame] | 463 | |
| 464 | /* Right now device-tree probed devices don't get dma_mask set. |
| 465 | * Since shared usb code relies on it, set it here for now. |
| 466 | * Once we have dma capability bindings this can go away. |
| 467 | */ |
Russell King | e1fd734 | 2013-06-27 12:36:37 +0100 | [diff] [blame] | 468 | ret = dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32)); |
Russell King | 22d9d8e | 2013-06-10 16:28:49 +0100 | [diff] [blame] | 469 | if (ret) |
| 470 | return ret; |
Jean-Christophe PLAGNIOL-VILLARD | 2419730 | 2011-11-21 06:55:18 +0800 | [diff] [blame] | 471 | |
| 472 | pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL); |
| 473 | if (!pdata) |
| 474 | return -ENOMEM; |
| 475 | |
Alexandre Belloni | 4a0c4c3 | 2015-12-02 20:36:55 +0100 | [diff] [blame] | 476 | pdev->dev.platform_data = pdata; |
| 477 | |
Jean-Christophe PLAGNIOL-VILLARD | 2419730 | 2011-11-21 06:55:18 +0800 | [diff] [blame] | 478 | if (!of_property_read_u32(np, "num-ports", &ports)) |
| 479 | pdata->ports = ports; |
| 480 | |
Nicolas Ferre | 0ee6d1e | 2012-03-21 16:53:09 +0100 | [diff] [blame] | 481 | at91_for_each_port(i) { |
Alexandre Belloni | bd73bfc | 2015-08-10 16:23:11 +0200 | [diff] [blame] | 482 | /* |
| 483 | * do not configure PIO if not in relation with |
| 484 | * real USB port on board |
| 485 | */ |
| 486 | if (i >= pdata->ports) { |
| 487 | pdata->vbus_pin[i] = -EINVAL; |
Alexandre Belloni | 4a0c4c3 | 2015-12-02 20:36:55 +0100 | [diff] [blame] | 488 | pdata->overcurrent_pin[i] = -EINVAL; |
Alexandre Belloni | e4df922 | 2015-08-10 16:23:12 +0200 | [diff] [blame] | 489 | continue; |
Thomas Petazzoni | aa6e52a | 2011-07-13 11:29:17 +0200 | [diff] [blame] | 490 | } |
| 491 | |
Alexandre Belloni | e4df922 | 2015-08-10 16:23:12 +0200 | [diff] [blame] | 492 | gpio = of_get_named_gpio_flags(np, "atmel,vbus-gpio", i, |
| 493 | &flags); |
| 494 | pdata->vbus_pin[i] = gpio; |
| 495 | if (!gpio_is_valid(gpio)) |
Alexandre Belloni | bd73bfc | 2015-08-10 16:23:11 +0200 | [diff] [blame] | 496 | continue; |
Alexandre Belloni | e4df922 | 2015-08-10 16:23:12 +0200 | [diff] [blame] | 497 | pdata->vbus_pin_active_low[i] = flags & OF_GPIO_ACTIVE_LOW; |
Thomas Petazzoni | aa6e52a | 2011-07-13 11:29:17 +0200 | [diff] [blame] | 498 | |
Alexandre Belloni | bd73bfc | 2015-08-10 16:23:11 +0200 | [diff] [blame] | 499 | ret = gpio_request(gpio, "ohci_vbus"); |
| 500 | if (ret) { |
| 501 | dev_err(&pdev->dev, |
| 502 | "can't request vbus gpio %d\n", gpio); |
| 503 | continue; |
| 504 | } |
| 505 | ret = gpio_direction_output(gpio, |
| 506 | !pdata->vbus_pin_active_low[i]); |
| 507 | if (ret) { |
| 508 | dev_err(&pdev->dev, |
| 509 | "can't put vbus gpio %d as output %d\n", |
| 510 | gpio, !pdata->vbus_pin_active_low[i]); |
| 511 | gpio_free(gpio); |
| 512 | continue; |
| 513 | } |
Nicolas Ferre | aaf9f5f | 2012-03-21 16:58:11 +0100 | [diff] [blame] | 514 | |
Alexandre Belloni | bd73bfc | 2015-08-10 16:23:11 +0200 | [diff] [blame] | 515 | ohci_at91_usb_set_power(pdata, i, 1); |
| 516 | } |
Nicolas Ferre | aaf9f5f | 2012-03-21 16:58:11 +0100 | [diff] [blame] | 517 | |
Alexandre Belloni | bd73bfc | 2015-08-10 16:23:11 +0200 | [diff] [blame] | 518 | at91_for_each_port(i) { |
Alexandre Belloni | 4a0c4c3 | 2015-12-02 20:36:55 +0100 | [diff] [blame] | 519 | if (i >= pdata->ports) |
| 520 | break; |
Alexandre Belloni | e4df922 | 2015-08-10 16:23:12 +0200 | [diff] [blame] | 521 | |
| 522 | pdata->overcurrent_pin[i] = |
| 523 | of_get_named_gpio_flags(np, "atmel,oc-gpio", i, &flags); |
| 524 | |
Alexandre Belloni | bd73bfc | 2015-08-10 16:23:11 +0200 | [diff] [blame] | 525 | if (!gpio_is_valid(pdata->overcurrent_pin[i])) |
| 526 | continue; |
| 527 | gpio = pdata->overcurrent_pin[i]; |
| 528 | |
| 529 | ret = gpio_request(gpio, "ohci_overcurrent"); |
| 530 | if (ret) { |
| 531 | dev_err(&pdev->dev, |
| 532 | "can't request overcurrent gpio %d\n", |
| 533 | gpio); |
| 534 | continue; |
| 535 | } |
| 536 | |
| 537 | ret = gpio_direction_input(gpio); |
| 538 | if (ret) { |
| 539 | dev_err(&pdev->dev, |
| 540 | "can't configure overcurrent gpio %d as input\n", |
| 541 | gpio); |
| 542 | gpio_free(gpio); |
| 543 | continue; |
| 544 | } |
| 545 | |
| 546 | ret = request_irq(gpio_to_irq(gpio), |
| 547 | ohci_hcd_at91_overcurrent_irq, |
| 548 | IRQF_SHARED, "ohci_overcurrent", pdev); |
| 549 | if (ret) { |
| 550 | gpio_free(gpio); |
| 551 | dev_err(&pdev->dev, |
| 552 | "can't get gpio IRQ for overcurrent\n"); |
David Brownell | 4bde4a4 | 2007-12-27 11:19:49 -0800 | [diff] [blame] | 553 | } |
| 554 | } |
| 555 | |
David Brownell | 0365ee0 | 2006-06-19 14:27:20 -0700 | [diff] [blame] | 556 | device_init_wakeup(&pdev->dev, 1); |
| 557 | return usb_hcd_at91_probe(&ohci_at91_hc_driver, pdev); |
Andrew Victor | 39a269c | 2006-01-22 10:32:13 -0800 | [diff] [blame] | 558 | } |
| 559 | |
Bill Pemberton | fb4e98a | 2012-11-19 13:26:20 -0500 | [diff] [blame] | 560 | static int ohci_hcd_at91_drv_remove(struct platform_device *pdev) |
Andrew Victor | 39a269c | 2006-01-22 10:32:13 -0800 | [diff] [blame] | 561 | { |
Jingoo Han | d4f09e2 | 2013-07-30 19:59:40 +0900 | [diff] [blame] | 562 | struct at91_usbh_data *pdata = dev_get_platdata(&pdev->dev); |
David Brownell | 4bde4a4 | 2007-12-27 11:19:49 -0800 | [diff] [blame] | 563 | int i; |
| 564 | |
| 565 | if (pdata) { |
Nicolas Ferre | 0ee6d1e | 2012-03-21 16:53:09 +0100 | [diff] [blame] | 566 | at91_for_each_port(i) { |
Jean-Christophe PLAGNIOL-VILLARD | 8a7a49d | 2011-09-19 15:32:23 +0800 | [diff] [blame] | 567 | if (!gpio_is_valid(pdata->vbus_pin[i])) |
David Brownell | 4bde4a4 | 2007-12-27 11:19:49 -0800 | [diff] [blame] | 568 | continue; |
Thomas Petazzoni | aa6e52a | 2011-07-13 11:29:17 +0200 | [diff] [blame] | 569 | ohci_at91_usb_set_power(pdata, i, 0); |
David Brownell | 4bde4a4 | 2007-12-27 11:19:49 -0800 | [diff] [blame] | 570 | gpio_free(pdata->vbus_pin[i]); |
| 571 | } |
Thomas Petazzoni | aa6e52a | 2011-07-13 11:29:17 +0200 | [diff] [blame] | 572 | |
Nicolas Ferre | 0ee6d1e | 2012-03-21 16:53:09 +0100 | [diff] [blame] | 573 | at91_for_each_port(i) { |
Jean-Christophe PLAGNIOL-VILLARD | 8a7a49d | 2011-09-19 15:32:23 +0800 | [diff] [blame] | 574 | if (!gpio_is_valid(pdata->overcurrent_pin[i])) |
Thomas Petazzoni | aa6e52a | 2011-07-13 11:29:17 +0200 | [diff] [blame] | 575 | continue; |
| 576 | free_irq(gpio_to_irq(pdata->overcurrent_pin[i]), pdev); |
| 577 | gpio_free(pdata->overcurrent_pin[i]); |
| 578 | } |
David Brownell | 4bde4a4 | 2007-12-27 11:19:49 -0800 | [diff] [blame] | 579 | } |
| 580 | |
David Brownell | 0365ee0 | 2006-06-19 14:27:20 -0700 | [diff] [blame] | 581 | device_init_wakeup(&pdev->dev, 0); |
Pete Zaitcev | 421b4bf | 2008-06-01 14:38:43 -0700 | [diff] [blame] | 582 | usb_hcd_at91_remove(platform_get_drvdata(pdev), pdev); |
| 583 | return 0; |
Andrew Victor | 39a269c | 2006-01-22 10:32:13 -0800 | [diff] [blame] | 584 | } |
| 585 | |
| 586 | #ifdef CONFIG_PM |
Andrew Victor | 39a269c | 2006-01-22 10:32:13 -0800 | [diff] [blame] | 587 | |
David Brownell | 68ba61b | 2006-04-02 20:26:21 -0800 | [diff] [blame] | 588 | static int |
Sylvain Rochet | 94ac0e5 | 2015-01-20 14:39:00 +0100 | [diff] [blame] | 589 | ohci_hcd_at91_drv_suspend(struct device *dev) |
David Brownell | 68ba61b | 2006-04-02 20:26:21 -0800 | [diff] [blame] | 590 | { |
Sylvain Rochet | 94ac0e5 | 2015-01-20 14:39:00 +0100 | [diff] [blame] | 591 | struct usb_hcd *hcd = dev_get_drvdata(dev); |
David Brownell | 0365ee0 | 2006-06-19 14:27:20 -0700 | [diff] [blame] | 592 | struct ohci_hcd *ohci = hcd_to_ohci(hcd); |
Sylvain Rochet | 1b20745 | 2015-01-20 14:39:02 +0100 | [diff] [blame] | 593 | struct ohci_at91_priv *ohci_at91 = hcd_to_ohci_at91_priv(hcd); |
Majunath Goudar | a9d3840 | 2013-11-13 17:40:17 +0530 | [diff] [blame] | 594 | int ret; |
David Brownell | 0365ee0 | 2006-06-19 14:27:20 -0700 | [diff] [blame] | 595 | |
Sylvain Rochet | 1cee6b8 | 2015-01-20 14:39:04 +0100 | [diff] [blame] | 596 | /* |
| 597 | * Disable wakeup if we are going to sleep with slow clock mode |
| 598 | * enabled. |
| 599 | */ |
| 600 | ohci_at91->wakeup = device_may_wakeup(dev) |
| 601 | && !at91_suspend_entering_slow_clock(); |
| 602 | |
| 603 | if (ohci_at91->wakeup) |
David Brownell | 0365ee0 | 2006-06-19 14:27:20 -0700 | [diff] [blame] | 604 | enable_irq_wake(hcd->irq); |
David Brownell | 0365ee0 | 2006-06-19 14:27:20 -0700 | [diff] [blame] | 605 | |
Sylvain Rochet | 1cee6b8 | 2015-01-20 14:39:04 +0100 | [diff] [blame] | 606 | ret = ohci_suspend(hcd, ohci_at91->wakeup); |
Majunath Goudar | a9d3840 | 2013-11-13 17:40:17 +0530 | [diff] [blame] | 607 | if (ret) { |
Sylvain Rochet | 1cee6b8 | 2015-01-20 14:39:04 +0100 | [diff] [blame] | 608 | if (ohci_at91->wakeup) |
| 609 | disable_irq_wake(hcd->irq); |
Majunath Goudar | a9d3840 | 2013-11-13 17:40:17 +0530 | [diff] [blame] | 610 | return ret; |
| 611 | } |
David Brownell | 0365ee0 | 2006-06-19 14:27:20 -0700 | [diff] [blame] | 612 | /* |
| 613 | * The integrated transceivers seem unable to notice disconnect, |
| 614 | * reconnect, or wakeup without the 48 MHz clock active. so for |
| 615 | * correctness, always discard connection state (using reset). |
| 616 | * |
| 617 | * REVISIT: some boards will be able to turn VBUS off... |
| 618 | */ |
Sylvain Rochet | 1cee6b8 | 2015-01-20 14:39:04 +0100 | [diff] [blame] | 619 | if (!ohci_at91->wakeup) { |
Manjunath Goudar | e3825b4 | 2013-09-21 16:38:42 +0530 | [diff] [blame] | 620 | ohci->hc_control = ohci_readl(ohci, &ohci->regs->control); |
| 621 | ohci->hc_control &= OHCI_CTRL_RWC; |
| 622 | ohci_writel(ohci, ohci->hc_control, &ohci->regs->control); |
| 623 | ohci->rh_state = OHCI_RH_HALTED; |
| 624 | |
Patrice Vilchez | 869aa98 | 2010-04-28 13:45:40 +0200 | [diff] [blame] | 625 | /* flush the writes */ |
| 626 | (void) ohci_readl (ohci, &ohci->regs->control); |
Sylvain Rochet | 1b20745 | 2015-01-20 14:39:02 +0100 | [diff] [blame] | 627 | at91_stop_clock(ohci_at91); |
David Brownell | 0365ee0 | 2006-06-19 14:27:20 -0700 | [diff] [blame] | 628 | } |
Andrew Victor | 39a269c | 2006-01-22 10:32:13 -0800 | [diff] [blame] | 629 | |
Majunath Goudar | a9d3840 | 2013-11-13 17:40:17 +0530 | [diff] [blame] | 630 | return ret; |
Andrew Victor | 39a269c | 2006-01-22 10:32:13 -0800 | [diff] [blame] | 631 | } |
| 632 | |
Sylvain Rochet | 94ac0e5 | 2015-01-20 14:39:00 +0100 | [diff] [blame] | 633 | static int ohci_hcd_at91_drv_resume(struct device *dev) |
Andrew Victor | 39a269c | 2006-01-22 10:32:13 -0800 | [diff] [blame] | 634 | { |
Sylvain Rochet | 94ac0e5 | 2015-01-20 14:39:00 +0100 | [diff] [blame] | 635 | struct usb_hcd *hcd = dev_get_drvdata(dev); |
Sylvain Rochet | 1b20745 | 2015-01-20 14:39:02 +0100 | [diff] [blame] | 636 | struct ohci_at91_priv *ohci_at91 = hcd_to_ohci_at91_priv(hcd); |
Marc Pignat | 6dde896 | 2007-01-09 14:00:11 -0800 | [diff] [blame] | 637 | |
Sylvain Rochet | 1cee6b8 | 2015-01-20 14:39:04 +0100 | [diff] [blame] | 638 | if (ohci_at91->wakeup) |
Marc Pignat | 6dde896 | 2007-01-09 14:00:11 -0800 | [diff] [blame] | 639 | disable_irq_wake(hcd->irq); |
| 640 | |
Sylvain Rochet | 1cee6b8 | 2015-01-20 14:39:04 +0100 | [diff] [blame] | 641 | at91_start_clock(ohci_at91); |
Andrew Victor | 39a269c | 2006-01-22 10:32:13 -0800 | [diff] [blame] | 642 | |
Florian Fainelli | cfa49b4 | 2012-10-08 15:11:29 +0200 | [diff] [blame] | 643 | ohci_resume(hcd, false); |
Andrew Victor | 39a269c | 2006-01-22 10:32:13 -0800 | [diff] [blame] | 644 | return 0; |
| 645 | } |
Andrew Victor | 39a269c | 2006-01-22 10:32:13 -0800 | [diff] [blame] | 646 | #endif |
| 647 | |
Sylvain Rochet | 94ac0e5 | 2015-01-20 14:39:00 +0100 | [diff] [blame] | 648 | static SIMPLE_DEV_PM_OPS(ohci_hcd_at91_pm_ops, ohci_hcd_at91_drv_suspend, |
| 649 | ohci_hcd_at91_drv_resume); |
| 650 | |
Andrew Victor | 39a269c | 2006-01-22 10:32:13 -0800 | [diff] [blame] | 651 | static struct platform_driver ohci_hcd_at91_driver = { |
| 652 | .probe = ohci_hcd_at91_drv_probe, |
Bill Pemberton | 7690417 | 2012-11-19 13:21:08 -0500 | [diff] [blame] | 653 | .remove = ohci_hcd_at91_drv_remove, |
Aleksey Gorelov | 64a21d0 | 2006-08-08 17:24:08 -0700 | [diff] [blame] | 654 | .shutdown = usb_hcd_platform_shutdown, |
Andrew Victor | 39a269c | 2006-01-22 10:32:13 -0800 | [diff] [blame] | 655 | .driver = { |
David Brownell | 0365ee0 | 2006-06-19 14:27:20 -0700 | [diff] [blame] | 656 | .name = "at91_ohci", |
Sylvain Rochet | 94ac0e5 | 2015-01-20 14:39:00 +0100 | [diff] [blame] | 657 | .pm = &ohci_hcd_at91_pm_ops, |
Alexandre Belloni | be12be5 | 2015-08-10 16:23:10 +0200 | [diff] [blame] | 658 | .of_match_table = at91_ohci_dt_ids, |
Andrew Victor | 39a269c | 2006-01-22 10:32:13 -0800 | [diff] [blame] | 659 | }, |
| 660 | }; |
Manjunath Goudar | e3825b4 | 2013-09-21 16:38:42 +0530 | [diff] [blame] | 661 | |
| 662 | static int __init ohci_at91_init(void) |
| 663 | { |
| 664 | if (usb_disabled()) |
| 665 | return -ENODEV; |
| 666 | |
| 667 | pr_info("%s: " DRIVER_DESC "\n", hcd_name); |
Sylvain Rochet | 1b20745 | 2015-01-20 14:39:02 +0100 | [diff] [blame] | 668 | ohci_init_driver(&ohci_at91_hc_driver, &ohci_at91_drv_overrides); |
Manjunath Goudar | e3825b4 | 2013-09-21 16:38:42 +0530 | [diff] [blame] | 669 | |
| 670 | /* |
| 671 | * The Atmel HW has some unusual quirks, which require Atmel-specific |
| 672 | * workarounds. We override certain hc_driver functions here to |
| 673 | * achieve that. We explicitly do not enhance ohci_driver_overrides to |
| 674 | * allow this more easily, since this is an unusual case, and we don't |
| 675 | * want to encourage others to override these functions by making it |
| 676 | * too easy. |
| 677 | */ |
| 678 | |
Manjunath Goudar | e3825b4 | 2013-09-21 16:38:42 +0530 | [diff] [blame] | 679 | ohci_at91_hc_driver.hub_status_data = ohci_at91_hub_status_data; |
| 680 | ohci_at91_hc_driver.hub_control = ohci_at91_hub_control; |
| 681 | |
| 682 | return platform_driver_register(&ohci_hcd_at91_driver); |
| 683 | } |
| 684 | module_init(ohci_at91_init); |
| 685 | |
| 686 | static void __exit ohci_at91_cleanup(void) |
| 687 | { |
| 688 | platform_driver_unregister(&ohci_hcd_at91_driver); |
| 689 | } |
| 690 | module_exit(ohci_at91_cleanup); |
| 691 | |
| 692 | MODULE_DESCRIPTION(DRIVER_DESC); |
| 693 | MODULE_LICENSE("GPL"); |
| 694 | MODULE_ALIAS("platform:at91_ohci"); |