Richard Zhao | b3d9968 | 2012-07-07 22:56:47 +0800 | [diff] [blame] | 1 | /* |
Peter Chen | 2400780 | 2014-02-24 10:20:54 +0800 | [diff] [blame^] | 2 | * Copyright 2012-2013 Freescale Semiconductor, Inc. |
Richard Zhao | b3d9968 | 2012-07-07 22:56:47 +0800 | [diff] [blame] | 3 | * Copyright (C) 2012 Marek Vasut <marex@denx.de> |
| 4 | * on behalf of DENX Software Engineering GmbH |
| 5 | * |
| 6 | * The code contained herein is licensed under the GNU General Public |
| 7 | * License. You may obtain a copy of the GNU General Public License |
| 8 | * Version 2 or later at the following locations: |
| 9 | * |
| 10 | * http://www.opensource.org/licenses/gpl-license.html |
| 11 | * http://www.gnu.org/copyleft/gpl.html |
| 12 | */ |
| 13 | |
| 14 | #include <linux/module.h> |
| 15 | #include <linux/kernel.h> |
| 16 | #include <linux/platform_device.h> |
| 17 | #include <linux/clk.h> |
| 18 | #include <linux/usb/otg.h> |
| 19 | #include <linux/stmp_device.h> |
| 20 | #include <linux/delay.h> |
| 21 | #include <linux/err.h> |
| 22 | #include <linux/io.h> |
Peter Chen | 2400780 | 2014-02-24 10:20:54 +0800 | [diff] [blame^] | 23 | #include <linux/of_device.h> |
Richard Zhao | b3d9968 | 2012-07-07 22:56:47 +0800 | [diff] [blame] | 24 | |
| 25 | #define DRIVER_NAME "mxs_phy" |
| 26 | |
| 27 | #define HW_USBPHY_PWD 0x00 |
| 28 | #define HW_USBPHY_CTRL 0x30 |
| 29 | #define HW_USBPHY_CTRL_SET 0x34 |
| 30 | #define HW_USBPHY_CTRL_CLR 0x38 |
| 31 | |
| 32 | #define BM_USBPHY_CTRL_SFTRST BIT(31) |
| 33 | #define BM_USBPHY_CTRL_CLKGATE BIT(30) |
| 34 | #define BM_USBPHY_CTRL_ENUTMILEVEL3 BIT(15) |
| 35 | #define BM_USBPHY_CTRL_ENUTMILEVEL2 BIT(14) |
| 36 | #define BM_USBPHY_CTRL_ENHOSTDISCONDETECT BIT(1) |
| 37 | |
Peter Chen | 2400780 | 2014-02-24 10:20:54 +0800 | [diff] [blame^] | 38 | #define to_mxs_phy(p) container_of((p), struct mxs_phy, phy) |
| 39 | |
| 40 | /* Do disconnection between PHY and controller without vbus */ |
| 41 | #define MXS_PHY_DISCONNECT_LINE_WITHOUT_VBUS BIT(0) |
| 42 | |
| 43 | /* |
| 44 | * The PHY will be in messy if there is a wakeup after putting |
| 45 | * bus to suspend (set portsc.suspendM) but before setting PHY to low |
| 46 | * power mode (set portsc.phcd). |
| 47 | */ |
| 48 | #define MXS_PHY_ABNORMAL_IN_SUSPEND BIT(1) |
| 49 | |
| 50 | /* |
| 51 | * The SOF sends too fast after resuming, it will cause disconnection |
| 52 | * between host and high speed device. |
| 53 | */ |
| 54 | #define MXS_PHY_SENDING_SOF_TOO_FAST BIT(2) |
| 55 | |
| 56 | struct mxs_phy_data { |
| 57 | unsigned int flags; |
| 58 | }; |
| 59 | |
| 60 | static const struct mxs_phy_data imx23_phy_data = { |
| 61 | .flags = MXS_PHY_ABNORMAL_IN_SUSPEND | MXS_PHY_SENDING_SOF_TOO_FAST, |
| 62 | }; |
| 63 | |
| 64 | static const struct mxs_phy_data imx6q_phy_data = { |
| 65 | .flags = MXS_PHY_SENDING_SOF_TOO_FAST | |
| 66 | MXS_PHY_DISCONNECT_LINE_WITHOUT_VBUS, |
| 67 | }; |
| 68 | |
| 69 | static const struct mxs_phy_data imx6sl_phy_data = { |
| 70 | .flags = MXS_PHY_DISCONNECT_LINE_WITHOUT_VBUS, |
| 71 | }; |
| 72 | |
| 73 | static const struct of_device_id mxs_phy_dt_ids[] = { |
| 74 | { .compatible = "fsl,imx6sl-usbphy", .data = &imx6sl_phy_data, }, |
| 75 | { .compatible = "fsl,imx6q-usbphy", .data = &imx6q_phy_data, }, |
| 76 | { .compatible = "fsl,imx23-usbphy", .data = &imx23_phy_data, }, |
| 77 | { /* sentinel */ } |
| 78 | }; |
| 79 | MODULE_DEVICE_TABLE(of, mxs_phy_dt_ids); |
| 80 | |
Richard Zhao | b3d9968 | 2012-07-07 22:56:47 +0800 | [diff] [blame] | 81 | struct mxs_phy { |
| 82 | struct usb_phy phy; |
| 83 | struct clk *clk; |
Peter Chen | 2400780 | 2014-02-24 10:20:54 +0800 | [diff] [blame^] | 84 | const struct mxs_phy_data *data; |
Richard Zhao | b3d9968 | 2012-07-07 22:56:47 +0800 | [diff] [blame] | 85 | }; |
| 86 | |
Fabio Estevam | 51e563e | 2013-07-03 16:34:13 -0300 | [diff] [blame] | 87 | static int mxs_phy_hw_init(struct mxs_phy *mxs_phy) |
Richard Zhao | b3d9968 | 2012-07-07 22:56:47 +0800 | [diff] [blame] | 88 | { |
Fabio Estevam | 51e563e | 2013-07-03 16:34:13 -0300 | [diff] [blame] | 89 | int ret; |
Richard Zhao | b3d9968 | 2012-07-07 22:56:47 +0800 | [diff] [blame] | 90 | void __iomem *base = mxs_phy->phy.io_priv; |
| 91 | |
Fabio Estevam | 51e563e | 2013-07-03 16:34:13 -0300 | [diff] [blame] | 92 | ret = stmp_reset_block(base + HW_USBPHY_CTRL); |
| 93 | if (ret) |
| 94 | return ret; |
Richard Zhao | b3d9968 | 2012-07-07 22:56:47 +0800 | [diff] [blame] | 95 | |
| 96 | /* Power up the PHY */ |
Marc Kleine-Budde | b5a726b | 2013-02-28 11:52:30 +0100 | [diff] [blame] | 97 | writel(0, base + HW_USBPHY_PWD); |
Richard Zhao | b3d9968 | 2012-07-07 22:56:47 +0800 | [diff] [blame] | 98 | |
| 99 | /* enable FS/LS device */ |
Marc Kleine-Budde | b5a726b | 2013-02-28 11:52:30 +0100 | [diff] [blame] | 100 | writel(BM_USBPHY_CTRL_ENUTMILEVEL2 | |
| 101 | BM_USBPHY_CTRL_ENUTMILEVEL3, |
| 102 | base + HW_USBPHY_CTRL_SET); |
Fabio Estevam | 51e563e | 2013-07-03 16:34:13 -0300 | [diff] [blame] | 103 | |
| 104 | return 0; |
Richard Zhao | b3d9968 | 2012-07-07 22:56:47 +0800 | [diff] [blame] | 105 | } |
| 106 | |
| 107 | static int mxs_phy_init(struct usb_phy *phy) |
| 108 | { |
Fabio Estevam | 67c21fc | 2013-12-02 01:02:34 -0200 | [diff] [blame] | 109 | int ret; |
Richard Zhao | b3d9968 | 2012-07-07 22:56:47 +0800 | [diff] [blame] | 110 | struct mxs_phy *mxs_phy = to_mxs_phy(phy); |
| 111 | |
Fabio Estevam | 67c21fc | 2013-12-02 01:02:34 -0200 | [diff] [blame] | 112 | ret = clk_prepare_enable(mxs_phy->clk); |
| 113 | if (ret) |
| 114 | return ret; |
| 115 | |
Fabio Estevam | 51e563e | 2013-07-03 16:34:13 -0300 | [diff] [blame] | 116 | return mxs_phy_hw_init(mxs_phy); |
Richard Zhao | b3d9968 | 2012-07-07 22:56:47 +0800 | [diff] [blame] | 117 | } |
| 118 | |
| 119 | static void mxs_phy_shutdown(struct usb_phy *phy) |
| 120 | { |
| 121 | struct mxs_phy *mxs_phy = to_mxs_phy(phy); |
| 122 | |
Marc Kleine-Budde | b5a726b | 2013-02-28 11:52:30 +0100 | [diff] [blame] | 123 | writel(BM_USBPHY_CTRL_CLKGATE, |
| 124 | phy->io_priv + HW_USBPHY_CTRL_SET); |
Richard Zhao | b3d9968 | 2012-07-07 22:56:47 +0800 | [diff] [blame] | 125 | |
| 126 | clk_disable_unprepare(mxs_phy->clk); |
| 127 | } |
| 128 | |
Peter Chen | 04a6221 | 2013-01-10 16:35:53 +0800 | [diff] [blame] | 129 | static int mxs_phy_suspend(struct usb_phy *x, int suspend) |
| 130 | { |
Fabio Estevam | 67c21fc | 2013-12-02 01:02:34 -0200 | [diff] [blame] | 131 | int ret; |
Peter Chen | 04a6221 | 2013-01-10 16:35:53 +0800 | [diff] [blame] | 132 | struct mxs_phy *mxs_phy = to_mxs_phy(x); |
| 133 | |
| 134 | if (suspend) { |
Marc Kleine-Budde | b5a726b | 2013-02-28 11:52:30 +0100 | [diff] [blame] | 135 | writel(0xffffffff, x->io_priv + HW_USBPHY_PWD); |
| 136 | writel(BM_USBPHY_CTRL_CLKGATE, |
| 137 | x->io_priv + HW_USBPHY_CTRL_SET); |
Peter Chen | 04a6221 | 2013-01-10 16:35:53 +0800 | [diff] [blame] | 138 | clk_disable_unprepare(mxs_phy->clk); |
| 139 | } else { |
Fabio Estevam | 67c21fc | 2013-12-02 01:02:34 -0200 | [diff] [blame] | 140 | ret = clk_prepare_enable(mxs_phy->clk); |
| 141 | if (ret) |
| 142 | return ret; |
Marc Kleine-Budde | b5a726b | 2013-02-28 11:52:30 +0100 | [diff] [blame] | 143 | writel(BM_USBPHY_CTRL_CLKGATE, |
| 144 | x->io_priv + HW_USBPHY_CTRL_CLR); |
| 145 | writel(0, x->io_priv + HW_USBPHY_PWD); |
Peter Chen | 04a6221 | 2013-01-10 16:35:53 +0800 | [diff] [blame] | 146 | } |
| 147 | |
| 148 | return 0; |
| 149 | } |
| 150 | |
Peter Chen | ac96511 | 2012-11-09 09:44:44 +0800 | [diff] [blame] | 151 | static int mxs_phy_on_connect(struct usb_phy *phy, |
| 152 | enum usb_device_speed speed) |
Richard Zhao | b3d9968 | 2012-07-07 22:56:47 +0800 | [diff] [blame] | 153 | { |
Peter Chen | ac96511 | 2012-11-09 09:44:44 +0800 | [diff] [blame] | 154 | dev_dbg(phy->dev, "%s speed device has connected\n", |
| 155 | (speed == USB_SPEED_HIGH) ? "high" : "non-high"); |
Richard Zhao | b3d9968 | 2012-07-07 22:56:47 +0800 | [diff] [blame] | 156 | |
Peter Chen | ac96511 | 2012-11-09 09:44:44 +0800 | [diff] [blame] | 157 | if (speed == USB_SPEED_HIGH) |
Marc Kleine-Budde | b5a726b | 2013-02-28 11:52:30 +0100 | [diff] [blame] | 158 | writel(BM_USBPHY_CTRL_ENHOSTDISCONDETECT, |
| 159 | phy->io_priv + HW_USBPHY_CTRL_SET); |
Richard Zhao | b3d9968 | 2012-07-07 22:56:47 +0800 | [diff] [blame] | 160 | |
| 161 | return 0; |
| 162 | } |
| 163 | |
Peter Chen | ac96511 | 2012-11-09 09:44:44 +0800 | [diff] [blame] | 164 | static int mxs_phy_on_disconnect(struct usb_phy *phy, |
| 165 | enum usb_device_speed speed) |
Richard Zhao | b3d9968 | 2012-07-07 22:56:47 +0800 | [diff] [blame] | 166 | { |
Peter Chen | ac96511 | 2012-11-09 09:44:44 +0800 | [diff] [blame] | 167 | dev_dbg(phy->dev, "%s speed device has disconnected\n", |
| 168 | (speed == USB_SPEED_HIGH) ? "high" : "non-high"); |
Richard Zhao | b3d9968 | 2012-07-07 22:56:47 +0800 | [diff] [blame] | 169 | |
Peter Chen | ac96511 | 2012-11-09 09:44:44 +0800 | [diff] [blame] | 170 | if (speed == USB_SPEED_HIGH) |
Marc Kleine-Budde | b5a726b | 2013-02-28 11:52:30 +0100 | [diff] [blame] | 171 | writel(BM_USBPHY_CTRL_ENHOSTDISCONDETECT, |
| 172 | phy->io_priv + HW_USBPHY_CTRL_CLR); |
Richard Zhao | b3d9968 | 2012-07-07 22:56:47 +0800 | [diff] [blame] | 173 | |
| 174 | return 0; |
| 175 | } |
| 176 | |
| 177 | static int mxs_phy_probe(struct platform_device *pdev) |
| 178 | { |
| 179 | struct resource *res; |
| 180 | void __iomem *base; |
| 181 | struct clk *clk; |
| 182 | struct mxs_phy *mxs_phy; |
Sascha Hauer | 25df639 | 2013-02-27 15:16:30 +0100 | [diff] [blame] | 183 | int ret; |
Peter Chen | 2400780 | 2014-02-24 10:20:54 +0800 | [diff] [blame^] | 184 | const struct of_device_id *of_id = |
| 185 | of_match_device(mxs_phy_dt_ids, &pdev->dev); |
Richard Zhao | b3d9968 | 2012-07-07 22:56:47 +0800 | [diff] [blame] | 186 | |
| 187 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
Thierry Reding | 148e113 | 2013-01-21 11:09:22 +0100 | [diff] [blame] | 188 | base = devm_ioremap_resource(&pdev->dev, res); |
| 189 | if (IS_ERR(base)) |
| 190 | return PTR_ERR(base); |
Richard Zhao | b3d9968 | 2012-07-07 22:56:47 +0800 | [diff] [blame] | 191 | |
| 192 | clk = devm_clk_get(&pdev->dev, NULL); |
| 193 | if (IS_ERR(clk)) { |
| 194 | dev_err(&pdev->dev, |
| 195 | "can't get the clock, err=%ld", PTR_ERR(clk)); |
| 196 | return PTR_ERR(clk); |
| 197 | } |
| 198 | |
| 199 | mxs_phy = devm_kzalloc(&pdev->dev, sizeof(*mxs_phy), GFP_KERNEL); |
| 200 | if (!mxs_phy) { |
| 201 | dev_err(&pdev->dev, "Failed to allocate USB PHY structure!\n"); |
| 202 | return -ENOMEM; |
| 203 | } |
| 204 | |
| 205 | mxs_phy->phy.io_priv = base; |
| 206 | mxs_phy->phy.dev = &pdev->dev; |
| 207 | mxs_phy->phy.label = DRIVER_NAME; |
| 208 | mxs_phy->phy.init = mxs_phy_init; |
| 209 | mxs_phy->phy.shutdown = mxs_phy_shutdown; |
Peter Chen | 04a6221 | 2013-01-10 16:35:53 +0800 | [diff] [blame] | 210 | mxs_phy->phy.set_suspend = mxs_phy_suspend; |
Richard Zhao | b3d9968 | 2012-07-07 22:56:47 +0800 | [diff] [blame] | 211 | mxs_phy->phy.notify_connect = mxs_phy_on_connect; |
| 212 | mxs_phy->phy.notify_disconnect = mxs_phy_on_disconnect; |
Michael Grzeschik | 4e0aa63 | 2013-05-15 15:03:14 +0200 | [diff] [blame] | 213 | mxs_phy->phy.type = USB_PHY_TYPE_USB2; |
Richard Zhao | b3d9968 | 2012-07-07 22:56:47 +0800 | [diff] [blame] | 214 | |
Richard Zhao | b3d9968 | 2012-07-07 22:56:47 +0800 | [diff] [blame] | 215 | mxs_phy->clk = clk; |
Peter Chen | 2400780 | 2014-02-24 10:20:54 +0800 | [diff] [blame^] | 216 | mxs_phy->data = of_id->data; |
Richard Zhao | b3d9968 | 2012-07-07 22:56:47 +0800 | [diff] [blame] | 217 | |
Jisheng Zhang | 97a27f7 | 2013-11-07 10:55:49 +0800 | [diff] [blame] | 218 | platform_set_drvdata(pdev, mxs_phy); |
Richard Zhao | b3d9968 | 2012-07-07 22:56:47 +0800 | [diff] [blame] | 219 | |
Sascha Hauer | 25df639 | 2013-02-27 15:16:30 +0100 | [diff] [blame] | 220 | ret = usb_add_phy_dev(&mxs_phy->phy); |
| 221 | if (ret) |
| 222 | return ret; |
| 223 | |
Richard Zhao | b3d9968 | 2012-07-07 22:56:47 +0800 | [diff] [blame] | 224 | return 0; |
| 225 | } |
| 226 | |
Bill Pemberton | fb4e98a | 2012-11-19 13:26:20 -0500 | [diff] [blame] | 227 | static int mxs_phy_remove(struct platform_device *pdev) |
Richard Zhao | b3d9968 | 2012-07-07 22:56:47 +0800 | [diff] [blame] | 228 | { |
Sascha Hauer | 25df639 | 2013-02-27 15:16:30 +0100 | [diff] [blame] | 229 | struct mxs_phy *mxs_phy = platform_get_drvdata(pdev); |
| 230 | |
| 231 | usb_remove_phy(&mxs_phy->phy); |
| 232 | |
Richard Zhao | b3d9968 | 2012-07-07 22:56:47 +0800 | [diff] [blame] | 233 | return 0; |
| 234 | } |
| 235 | |
Richard Zhao | b3d9968 | 2012-07-07 22:56:47 +0800 | [diff] [blame] | 236 | static struct platform_driver mxs_phy_driver = { |
| 237 | .probe = mxs_phy_probe, |
Bill Pemberton | 7690417 | 2012-11-19 13:21:08 -0500 | [diff] [blame] | 238 | .remove = mxs_phy_remove, |
Richard Zhao | b3d9968 | 2012-07-07 22:56:47 +0800 | [diff] [blame] | 239 | .driver = { |
| 240 | .name = DRIVER_NAME, |
| 241 | .owner = THIS_MODULE, |
| 242 | .of_match_table = mxs_phy_dt_ids, |
| 243 | }, |
| 244 | }; |
| 245 | |
| 246 | static int __init mxs_phy_module_init(void) |
| 247 | { |
| 248 | return platform_driver_register(&mxs_phy_driver); |
| 249 | } |
| 250 | postcore_initcall(mxs_phy_module_init); |
| 251 | |
| 252 | static void __exit mxs_phy_module_exit(void) |
| 253 | { |
| 254 | platform_driver_unregister(&mxs_phy_driver); |
| 255 | } |
| 256 | module_exit(mxs_phy_module_exit); |
| 257 | |
| 258 | MODULE_ALIAS("platform:mxs-usb-phy"); |
| 259 | MODULE_AUTHOR("Marek Vasut <marex@denx.de>"); |
| 260 | MODULE_AUTHOR("Richard Zhao <richard.zhao@freescale.com>"); |
| 261 | MODULE_DESCRIPTION("Freescale MXS USB PHY driver"); |
| 262 | MODULE_LICENSE("GPL"); |