Thomas Gleixner | c942fdd | 2019-05-27 08:55:06 +0200 | [diff] [blame^] | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
Kishon Vijay Abraham I | 14da699 | 2014-03-06 16:38:37 +0200 | [diff] [blame] | 2 | /* |
| 3 | * omap-control-phy.c - The PHY part of control module. |
| 4 | * |
| 5 | * Copyright (C) 2013 Texas Instruments Incorporated - http://www.ti.com |
Kishon Vijay Abraham I | 14da699 | 2014-03-06 16:38:37 +0200 | [diff] [blame] | 6 | * Author: Kishon Vijay Abraham I <kishon@ti.com> |
Kishon Vijay Abraham I | 14da699 | 2014-03-06 16:38:37 +0200 | [diff] [blame] | 7 | */ |
| 8 | |
| 9 | #include <linux/module.h> |
| 10 | #include <linux/platform_device.h> |
| 11 | #include <linux/slab.h> |
| 12 | #include <linux/of.h> |
| 13 | #include <linux/of_device.h> |
| 14 | #include <linux/err.h> |
| 15 | #include <linux/io.h> |
| 16 | #include <linux/clk.h> |
| 17 | #include <linux/phy/omap_control_phy.h> |
| 18 | |
| 19 | /** |
Kishon Vijay Abraham I | f0e2cf7 | 2014-06-25 23:22:57 +0530 | [diff] [blame] | 20 | * omap_control_pcie_pcs - set the PCS delay count |
| 21 | * @dev: the control module device |
Kishon Vijay Abraham I | f0e2cf7 | 2014-06-25 23:22:57 +0530 | [diff] [blame] | 22 | * @delay: 8 bit delay value |
| 23 | */ |
Vignesh R | 0bc09f9 | 2014-12-16 14:52:50 +0530 | [diff] [blame] | 24 | void omap_control_pcie_pcs(struct device *dev, u8 delay) |
Kishon Vijay Abraham I | f0e2cf7 | 2014-06-25 23:22:57 +0530 | [diff] [blame] | 25 | { |
| 26 | u32 val; |
| 27 | struct omap_control_phy *control_phy; |
| 28 | |
| 29 | if (IS_ERR(dev) || !dev) { |
| 30 | pr_err("%s: invalid device\n", __func__); |
| 31 | return; |
| 32 | } |
| 33 | |
| 34 | control_phy = dev_get_drvdata(dev); |
| 35 | if (!control_phy) { |
| 36 | dev_err(dev, "%s: invalid control phy device\n", __func__); |
| 37 | return; |
| 38 | } |
| 39 | |
| 40 | if (control_phy->type != OMAP_CTRL_TYPE_PCIE) { |
| 41 | dev_err(dev, "%s: unsupported operation\n", __func__); |
| 42 | return; |
| 43 | } |
| 44 | |
| 45 | val = readl(control_phy->pcie_pcs); |
| 46 | val &= ~(OMAP_CTRL_PCIE_PCS_MASK << |
Vignesh R | 0bc09f9 | 2014-12-16 14:52:50 +0530 | [diff] [blame] | 47 | OMAP_CTRL_PCIE_PCS_DELAY_COUNT_SHIFT); |
| 48 | val |= (delay << OMAP_CTRL_PCIE_PCS_DELAY_COUNT_SHIFT); |
Kishon Vijay Abraham I | f0e2cf7 | 2014-06-25 23:22:57 +0530 | [diff] [blame] | 49 | writel(val, control_phy->pcie_pcs); |
| 50 | } |
| 51 | EXPORT_SYMBOL_GPL(omap_control_pcie_pcs); |
| 52 | |
| 53 | /** |
Kishon Vijay Abraham I | 14da699 | 2014-03-06 16:38:37 +0200 | [diff] [blame] | 54 | * omap_control_phy_power - power on/off the phy using control module reg |
| 55 | * @dev: the control module device |
| 56 | * @on: 0 or 1, based on powering on or off the PHY |
| 57 | */ |
| 58 | void omap_control_phy_power(struct device *dev, int on) |
| 59 | { |
| 60 | u32 val; |
| 61 | unsigned long rate; |
| 62 | struct omap_control_phy *control_phy; |
| 63 | |
| 64 | if (IS_ERR(dev) || !dev) { |
| 65 | pr_err("%s: invalid device\n", __func__); |
| 66 | return; |
| 67 | } |
| 68 | |
| 69 | control_phy = dev_get_drvdata(dev); |
| 70 | if (!control_phy) { |
| 71 | dev_err(dev, "%s: invalid control phy device\n", __func__); |
| 72 | return; |
| 73 | } |
| 74 | |
| 75 | if (control_phy->type == OMAP_CTRL_TYPE_OTGHS) |
| 76 | return; |
| 77 | |
| 78 | val = readl(control_phy->power); |
| 79 | |
| 80 | switch (control_phy->type) { |
| 81 | case OMAP_CTRL_TYPE_USB2: |
| 82 | if (on) |
| 83 | val &= ~OMAP_CTRL_DEV_PHY_PD; |
| 84 | else |
| 85 | val |= OMAP_CTRL_DEV_PHY_PD; |
| 86 | break; |
| 87 | |
Kishon Vijay Abraham I | f0e2cf7 | 2014-06-25 23:22:57 +0530 | [diff] [blame] | 88 | case OMAP_CTRL_TYPE_PCIE: |
Kishon Vijay Abraham I | 14da699 | 2014-03-06 16:38:37 +0200 | [diff] [blame] | 89 | case OMAP_CTRL_TYPE_PIPE3: |
| 90 | rate = clk_get_rate(control_phy->sys_clk); |
| 91 | rate = rate/1000000; |
| 92 | |
| 93 | if (on) { |
| 94 | val &= ~(OMAP_CTRL_PIPE3_PHY_PWRCTL_CLK_CMD_MASK | |
| 95 | OMAP_CTRL_PIPE3_PHY_PWRCTL_CLK_FREQ_MASK); |
| 96 | val |= OMAP_CTRL_PIPE3_PHY_TX_RX_POWERON << |
| 97 | OMAP_CTRL_PIPE3_PHY_PWRCTL_CLK_CMD_SHIFT; |
| 98 | val |= rate << |
| 99 | OMAP_CTRL_PIPE3_PHY_PWRCTL_CLK_FREQ_SHIFT; |
| 100 | } else { |
| 101 | val &= ~OMAP_CTRL_PIPE3_PHY_PWRCTL_CLK_CMD_MASK; |
| 102 | val |= OMAP_CTRL_PIPE3_PHY_TX_RX_POWEROFF << |
| 103 | OMAP_CTRL_PIPE3_PHY_PWRCTL_CLK_CMD_SHIFT; |
| 104 | } |
| 105 | break; |
| 106 | |
| 107 | case OMAP_CTRL_TYPE_DRA7USB2: |
| 108 | if (on) |
| 109 | val &= ~OMAP_CTRL_USB2_PHY_PD; |
| 110 | else |
| 111 | val |= OMAP_CTRL_USB2_PHY_PD; |
| 112 | break; |
| 113 | |
| 114 | case OMAP_CTRL_TYPE_AM437USB2: |
| 115 | if (on) { |
| 116 | val &= ~(AM437X_CTRL_USB2_PHY_PD | |
| 117 | AM437X_CTRL_USB2_OTG_PD); |
| 118 | val |= (AM437X_CTRL_USB2_OTGVDET_EN | |
| 119 | AM437X_CTRL_USB2_OTGSESSEND_EN); |
| 120 | } else { |
| 121 | val &= ~(AM437X_CTRL_USB2_OTGVDET_EN | |
| 122 | AM437X_CTRL_USB2_OTGSESSEND_EN); |
| 123 | val |= (AM437X_CTRL_USB2_PHY_PD | |
| 124 | AM437X_CTRL_USB2_OTG_PD); |
| 125 | } |
| 126 | break; |
| 127 | default: |
| 128 | dev_err(dev, "%s: type %d not recognized\n", |
| 129 | __func__, control_phy->type); |
| 130 | break; |
| 131 | } |
| 132 | |
| 133 | writel(val, control_phy->power); |
| 134 | } |
| 135 | EXPORT_SYMBOL_GPL(omap_control_phy_power); |
| 136 | |
| 137 | /** |
| 138 | * omap_control_usb_host_mode - set AVALID, VBUSVALID and ID pin in grounded |
| 139 | * @ctrl_phy: struct omap_control_phy * |
| 140 | * |
| 141 | * Writes to the mailbox register to notify the usb core that a usb |
| 142 | * device has been connected. |
| 143 | */ |
| 144 | static void omap_control_usb_host_mode(struct omap_control_phy *ctrl_phy) |
| 145 | { |
| 146 | u32 val; |
| 147 | |
| 148 | val = readl(ctrl_phy->otghs_control); |
| 149 | val &= ~(OMAP_CTRL_DEV_IDDIG | OMAP_CTRL_DEV_SESSEND); |
| 150 | val |= OMAP_CTRL_DEV_AVALID | OMAP_CTRL_DEV_VBUSVALID; |
| 151 | writel(val, ctrl_phy->otghs_control); |
| 152 | } |
| 153 | |
| 154 | /** |
| 155 | * omap_control_usb_device_mode - set AVALID, VBUSVALID and ID pin in high |
| 156 | * impedance |
| 157 | * @ctrl_phy: struct omap_control_phy * |
| 158 | * |
| 159 | * Writes to the mailbox register to notify the usb core that it has been |
| 160 | * connected to a usb host. |
| 161 | */ |
| 162 | static void omap_control_usb_device_mode(struct omap_control_phy *ctrl_phy) |
| 163 | { |
| 164 | u32 val; |
| 165 | |
| 166 | val = readl(ctrl_phy->otghs_control); |
| 167 | val &= ~OMAP_CTRL_DEV_SESSEND; |
| 168 | val |= OMAP_CTRL_DEV_IDDIG | OMAP_CTRL_DEV_AVALID | |
| 169 | OMAP_CTRL_DEV_VBUSVALID; |
| 170 | writel(val, ctrl_phy->otghs_control); |
| 171 | } |
| 172 | |
| 173 | /** |
| 174 | * omap_control_usb_set_sessionend - Enable SESSIONEND and IDIG to high |
| 175 | * impedance |
| 176 | * @ctrl_phy: struct omap_control_phy * |
| 177 | * |
| 178 | * Writes to the mailbox register to notify the usb core it's now in |
| 179 | * disconnected state. |
| 180 | */ |
| 181 | static void omap_control_usb_set_sessionend(struct omap_control_phy *ctrl_phy) |
| 182 | { |
| 183 | u32 val; |
| 184 | |
| 185 | val = readl(ctrl_phy->otghs_control); |
| 186 | val &= ~(OMAP_CTRL_DEV_AVALID | OMAP_CTRL_DEV_VBUSVALID); |
| 187 | val |= OMAP_CTRL_DEV_IDDIG | OMAP_CTRL_DEV_SESSEND; |
| 188 | writel(val, ctrl_phy->otghs_control); |
| 189 | } |
| 190 | |
| 191 | /** |
| 192 | * omap_control_usb_set_mode - Calls to functions to set USB in one of host mode |
| 193 | * or device mode or to denote disconnected state |
| 194 | * @dev: the control module device |
| 195 | * @mode: The mode to which usb should be configured |
| 196 | * |
| 197 | * This is an API to write to the mailbox register to notify the usb core that |
| 198 | * a usb device has been connected. |
| 199 | */ |
| 200 | void omap_control_usb_set_mode(struct device *dev, |
| 201 | enum omap_control_usb_mode mode) |
| 202 | { |
| 203 | struct omap_control_phy *ctrl_phy; |
| 204 | |
| 205 | if (IS_ERR(dev) || !dev) |
| 206 | return; |
| 207 | |
| 208 | ctrl_phy = dev_get_drvdata(dev); |
Kishon Vijay Abraham I | 14da699 | 2014-03-06 16:38:37 +0200 | [diff] [blame] | 209 | if (!ctrl_phy) { |
| 210 | dev_err(dev, "Invalid control phy device\n"); |
| 211 | return; |
| 212 | } |
| 213 | |
| 214 | if (ctrl_phy->type != OMAP_CTRL_TYPE_OTGHS) |
| 215 | return; |
| 216 | |
| 217 | switch (mode) { |
| 218 | case USB_MODE_HOST: |
| 219 | omap_control_usb_host_mode(ctrl_phy); |
| 220 | break; |
| 221 | case USB_MODE_DEVICE: |
| 222 | omap_control_usb_device_mode(ctrl_phy); |
| 223 | break; |
| 224 | case USB_MODE_DISCONNECT: |
| 225 | omap_control_usb_set_sessionend(ctrl_phy); |
| 226 | break; |
| 227 | default: |
| 228 | dev_vdbg(dev, "invalid omap control usb mode\n"); |
| 229 | } |
| 230 | } |
| 231 | EXPORT_SYMBOL_GPL(omap_control_usb_set_mode); |
| 232 | |
Kishon Vijay Abraham I | 14da699 | 2014-03-06 16:38:37 +0200 | [diff] [blame] | 233 | static const enum omap_control_phy_type otghs_data = OMAP_CTRL_TYPE_OTGHS; |
| 234 | static const enum omap_control_phy_type usb2_data = OMAP_CTRL_TYPE_USB2; |
| 235 | static const enum omap_control_phy_type pipe3_data = OMAP_CTRL_TYPE_PIPE3; |
Kishon Vijay Abraham I | f0e2cf7 | 2014-06-25 23:22:57 +0530 | [diff] [blame] | 236 | static const enum omap_control_phy_type pcie_data = OMAP_CTRL_TYPE_PCIE; |
Kishon Vijay Abraham I | 14da699 | 2014-03-06 16:38:37 +0200 | [diff] [blame] | 237 | static const enum omap_control_phy_type dra7usb2_data = OMAP_CTRL_TYPE_DRA7USB2; |
| 238 | static const enum omap_control_phy_type am437usb2_data = OMAP_CTRL_TYPE_AM437USB2; |
| 239 | |
| 240 | static const struct of_device_id omap_control_phy_id_table[] = { |
| 241 | { |
| 242 | .compatible = "ti,control-phy-otghs", |
| 243 | .data = &otghs_data, |
| 244 | }, |
| 245 | { |
| 246 | .compatible = "ti,control-phy-usb2", |
| 247 | .data = &usb2_data, |
| 248 | }, |
| 249 | { |
| 250 | .compatible = "ti,control-phy-pipe3", |
| 251 | .data = &pipe3_data, |
| 252 | }, |
| 253 | { |
Kishon Vijay Abraham I | f0e2cf7 | 2014-06-25 23:22:57 +0530 | [diff] [blame] | 254 | .compatible = "ti,control-phy-pcie", |
| 255 | .data = &pcie_data, |
| 256 | }, |
| 257 | { |
Roger Quadros | 51c9f4a | 2014-03-07 11:18:00 +0530 | [diff] [blame] | 258 | .compatible = "ti,control-phy-usb2-dra7", |
Kishon Vijay Abraham I | 14da699 | 2014-03-06 16:38:37 +0200 | [diff] [blame] | 259 | .data = &dra7usb2_data, |
| 260 | }, |
| 261 | { |
Roger Quadros | 51c9f4a | 2014-03-07 11:18:00 +0530 | [diff] [blame] | 262 | .compatible = "ti,control-phy-usb2-am437", |
Kishon Vijay Abraham I | 14da699 | 2014-03-06 16:38:37 +0200 | [diff] [blame] | 263 | .data = &am437usb2_data, |
| 264 | }, |
| 265 | {}, |
| 266 | }; |
| 267 | MODULE_DEVICE_TABLE(of, omap_control_phy_id_table); |
Kishon Vijay Abraham I | 14da699 | 2014-03-06 16:38:37 +0200 | [diff] [blame] | 268 | |
| 269 | static int omap_control_phy_probe(struct platform_device *pdev) |
| 270 | { |
| 271 | struct resource *res; |
| 272 | const struct of_device_id *of_id; |
| 273 | struct omap_control_phy *control_phy; |
| 274 | |
Axel Lin | 1f9ba76 | 2015-03-05 18:18:45 +0800 | [diff] [blame] | 275 | of_id = of_match_device(omap_control_phy_id_table, &pdev->dev); |
Kishon Vijay Abraham I | 14da699 | 2014-03-06 16:38:37 +0200 | [diff] [blame] | 276 | if (!of_id) |
| 277 | return -EINVAL; |
| 278 | |
| 279 | control_phy = devm_kzalloc(&pdev->dev, sizeof(*control_phy), |
| 280 | GFP_KERNEL); |
Peter Griffin | 437a6bc | 2014-08-15 13:40:08 +0100 | [diff] [blame] | 281 | if (!control_phy) |
Kishon Vijay Abraham I | 14da699 | 2014-03-06 16:38:37 +0200 | [diff] [blame] | 282 | return -ENOMEM; |
Kishon Vijay Abraham I | 14da699 | 2014-03-06 16:38:37 +0200 | [diff] [blame] | 283 | |
| 284 | control_phy->dev = &pdev->dev; |
| 285 | control_phy->type = *(enum omap_control_phy_type *)of_id->data; |
| 286 | |
| 287 | if (control_phy->type == OMAP_CTRL_TYPE_OTGHS) { |
| 288 | res = platform_get_resource_byname(pdev, IORESOURCE_MEM, |
| 289 | "otghs_control"); |
| 290 | control_phy->otghs_control = devm_ioremap_resource( |
| 291 | &pdev->dev, res); |
| 292 | if (IS_ERR(control_phy->otghs_control)) |
| 293 | return PTR_ERR(control_phy->otghs_control); |
| 294 | } else { |
| 295 | res = platform_get_resource_byname(pdev, IORESOURCE_MEM, |
| 296 | "power"); |
| 297 | control_phy->power = devm_ioremap_resource(&pdev->dev, res); |
| 298 | if (IS_ERR(control_phy->power)) { |
| 299 | dev_err(&pdev->dev, "Couldn't get power register\n"); |
| 300 | return PTR_ERR(control_phy->power); |
| 301 | } |
| 302 | } |
| 303 | |
Kishon Vijay Abraham I | f0e2cf7 | 2014-06-25 23:22:57 +0530 | [diff] [blame] | 304 | if (control_phy->type == OMAP_CTRL_TYPE_PIPE3 || |
| 305 | control_phy->type == OMAP_CTRL_TYPE_PCIE) { |
Kishon Vijay Abraham I | 14da699 | 2014-03-06 16:38:37 +0200 | [diff] [blame] | 306 | control_phy->sys_clk = devm_clk_get(control_phy->dev, |
| 307 | "sys_clkin"); |
| 308 | if (IS_ERR(control_phy->sys_clk)) { |
| 309 | pr_err("%s: unable to get sys_clkin\n", __func__); |
| 310 | return -EINVAL; |
| 311 | } |
| 312 | } |
| 313 | |
Kishon Vijay Abraham I | f0e2cf7 | 2014-06-25 23:22:57 +0530 | [diff] [blame] | 314 | if (control_phy->type == OMAP_CTRL_TYPE_PCIE) { |
| 315 | res = platform_get_resource_byname(pdev, IORESOURCE_MEM, |
| 316 | "pcie_pcs"); |
| 317 | control_phy->pcie_pcs = devm_ioremap_resource(&pdev->dev, res); |
| 318 | if (IS_ERR(control_phy->pcie_pcs)) |
| 319 | return PTR_ERR(control_phy->pcie_pcs); |
| 320 | } |
| 321 | |
Kishon Vijay Abraham I | 14da699 | 2014-03-06 16:38:37 +0200 | [diff] [blame] | 322 | dev_set_drvdata(control_phy->dev, control_phy); |
| 323 | |
| 324 | return 0; |
| 325 | } |
| 326 | |
| 327 | static struct platform_driver omap_control_phy_driver = { |
| 328 | .probe = omap_control_phy_probe, |
| 329 | .driver = { |
| 330 | .name = "omap-control-phy", |
Axel Lin | 1f9ba76 | 2015-03-05 18:18:45 +0800 | [diff] [blame] | 331 | .of_match_table = omap_control_phy_id_table, |
Kishon Vijay Abraham I | 14da699 | 2014-03-06 16:38:37 +0200 | [diff] [blame] | 332 | }, |
| 333 | }; |
| 334 | |
| 335 | static int __init omap_control_phy_init(void) |
| 336 | { |
| 337 | return platform_driver_register(&omap_control_phy_driver); |
| 338 | } |
| 339 | subsys_initcall(omap_control_phy_init); |
| 340 | |
| 341 | static void __exit omap_control_phy_exit(void) |
| 342 | { |
| 343 | platform_driver_unregister(&omap_control_phy_driver); |
| 344 | } |
| 345 | module_exit(omap_control_phy_exit); |
| 346 | |
Axel Lin | dd64ad38 | 2015-03-07 00:01:21 +0800 | [diff] [blame] | 347 | MODULE_ALIAS("platform:omap_control_phy"); |
Kishon Vijay Abraham I | 14da699 | 2014-03-06 16:38:37 +0200 | [diff] [blame] | 348 | MODULE_AUTHOR("Texas Instruments Inc."); |
| 349 | MODULE_DESCRIPTION("OMAP Control Module PHY Driver"); |
| 350 | MODULE_LICENSE("GPL v2"); |