2 * omap-usb-tll.c - The USB TLL driver for OMAP EHCI & OHCI
4 * Copyright (C) 2012 Texas Instruments Incorporated - http://www.ti.com
5 * Author: Keshava Munegowda <keshava_mgowda@ti.com>
7 * This program is free software: you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 of
9 * the License as published by the Free Software Foundation.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program. If not, see <http://www.gnu.org/licenses/>.
19 #include <linux/kernel.h>
20 #include <linux/module.h>
21 #include <linux/types.h>
22 #include <linux/slab.h>
23 #include <linux/spinlock.h>
24 #include <linux/platform_device.h>
25 #include <linux/clk.h>
27 #include <linux/err.h>
28 #include <linux/pm_runtime.h>
29 #include <linux/platform_data/usb-omap.h>
31 #define USBTLL_DRIVER_NAME "usbhs_tll"
33 /* TLL Register Set */
34 #define OMAP_USBTLL_REVISION (0x00)
35 #define OMAP_USBTLL_SYSCONFIG (0x10)
36 #define OMAP_USBTLL_SYSCONFIG_CACTIVITY (1 << 8)
37 #define OMAP_USBTLL_SYSCONFIG_SIDLEMODE (1 << 3)
38 #define OMAP_USBTLL_SYSCONFIG_ENAWAKEUP (1 << 2)
39 #define OMAP_USBTLL_SYSCONFIG_SOFTRESET (1 << 1)
40 #define OMAP_USBTLL_SYSCONFIG_AUTOIDLE (1 << 0)
42 #define OMAP_USBTLL_SYSSTATUS (0x14)
43 #define OMAP_USBTLL_SYSSTATUS_RESETDONE (1 << 0)
45 #define OMAP_USBTLL_IRQSTATUS (0x18)
46 #define OMAP_USBTLL_IRQENABLE (0x1C)
48 #define OMAP_TLL_SHARED_CONF (0x30)
49 #define OMAP_TLL_SHARED_CONF_USB_90D_DDR_EN (1 << 6)
50 #define OMAP_TLL_SHARED_CONF_USB_180D_SDR_EN (1 << 5)
51 #define OMAP_TLL_SHARED_CONF_USB_DIVRATION (1 << 2)
52 #define OMAP_TLL_SHARED_CONF_FCLK_REQ (1 << 1)
53 #define OMAP_TLL_SHARED_CONF_FCLK_IS_ON (1 << 0)
55 #define OMAP_TLL_CHANNEL_CONF(num) (0x040 + 0x004 * num)
56 #define OMAP_TLL_CHANNEL_CONF_FSLSMODE_SHIFT 24
57 #define OMAP_TLL_CHANNEL_CONF_ULPINOBITSTUFF (1 << 11)
58 #define OMAP_TLL_CHANNEL_CONF_ULPI_ULPIAUTOIDLE (1 << 10)
59 #define OMAP_TLL_CHANNEL_CONF_UTMIAUTOIDLE (1 << 9)
60 #define OMAP_TLL_CHANNEL_CONF_ULPIDDRMODE (1 << 8)
61 #define OMAP_TLL_CHANNEL_CONF_CHANMODE_FSLS (1 << 1)
62 #define OMAP_TLL_CHANNEL_CONF_CHANEN (1 << 0)
64 #define OMAP_TLL_FSLSMODE_6PIN_PHY_DAT_SE0 0x0
65 #define OMAP_TLL_FSLSMODE_6PIN_PHY_DP_DM 0x1
66 #define OMAP_TLL_FSLSMODE_3PIN_PHY 0x2
67 #define OMAP_TLL_FSLSMODE_4PIN_PHY 0x3
68 #define OMAP_TLL_FSLSMODE_6PIN_TLL_DAT_SE0 0x4
69 #define OMAP_TLL_FSLSMODE_6PIN_TLL_DP_DM 0x5
70 #define OMAP_TLL_FSLSMODE_3PIN_TLL 0x6
71 #define OMAP_TLL_FSLSMODE_4PIN_TLL 0x7
72 #define OMAP_TLL_FSLSMODE_2PIN_TLL_DAT_SE0 0xA
73 #define OMAP_TLL_FSLSMODE_2PIN_DAT_DP_DM 0xB
75 #define OMAP_TLL_ULPI_FUNCTION_CTRL(num) (0x804 + 0x100 * num)
76 #define OMAP_TLL_ULPI_INTERFACE_CTRL(num) (0x807 + 0x100 * num)
77 #define OMAP_TLL_ULPI_OTG_CTRL(num) (0x80A + 0x100 * num)
78 #define OMAP_TLL_ULPI_INT_EN_RISE(num) (0x80D + 0x100 * num)
79 #define OMAP_TLL_ULPI_INT_EN_FALL(num) (0x810 + 0x100 * num)
80 #define OMAP_TLL_ULPI_INT_STATUS(num) (0x813 + 0x100 * num)
81 #define OMAP_TLL_ULPI_INT_LATCH(num) (0x814 + 0x100 * num)
82 #define OMAP_TLL_ULPI_DEBUG(num) (0x815 + 0x100 * num)
83 #define OMAP_TLL_ULPI_SCRATCH_REGISTER(num) (0x816 + 0x100 * num)
85 #define OMAP_REV2_TLL_CHANNEL_COUNT 2
86 #define OMAP_TLL_CHANNEL_COUNT 3
87 #define OMAP_TLL_CHANNEL_1_EN_MASK (1 << 0)
88 #define OMAP_TLL_CHANNEL_2_EN_MASK (1 << 1)
89 #define OMAP_TLL_CHANNEL_3_EN_MASK (1 << 2)
91 /* Values of USBTLL_REVISION - Note: these are not given in the TRM */
92 #define OMAP_USBTLL_REV1 0x00000015 /* OMAP3 */
93 #define OMAP_USBTLL_REV2 0x00000018 /* OMAP 3630 */
94 #define OMAP_USBTLL_REV3 0x00000004 /* OMAP4 */
96 #define is_ehci_tll_mode(x) (x == OMAP_EHCI_PORT_MODE_TLL)
99 struct clk *usbtll_p1_fck;
100 struct clk *usbtll_p2_fck;
101 struct usbhs_omap_platform_data *pdata;
102 /* secure the register updates */
106 /*-------------------------------------------------------------------------*/
108 const char usbtll_driver_name[] = USBTLL_DRIVER_NAME;
109 struct platform_device *tll_pdev;
111 /*-------------------------------------------------------------------------*/
113 static inline void usbtll_write(void __iomem *base, u32 reg, u32 val)
115 __raw_writel(val, base + reg);
118 static inline u32 usbtll_read(void __iomem *base, u32 reg)
120 return __raw_readl(base + reg);
123 static inline void usbtll_writeb(void __iomem *base, u8 reg, u8 val)
125 __raw_writeb(val, base + reg);
128 static inline u8 usbtll_readb(void __iomem *base, u8 reg)
130 return __raw_readb(base + reg);
133 /*-------------------------------------------------------------------------*/
135 static bool is_ohci_port(enum usbhs_omap_port_mode pmode)
138 case OMAP_OHCI_PORT_MODE_PHY_6PIN_DATSE0:
139 case OMAP_OHCI_PORT_MODE_PHY_6PIN_DPDM:
140 case OMAP_OHCI_PORT_MODE_PHY_3PIN_DATSE0:
141 case OMAP_OHCI_PORT_MODE_PHY_4PIN_DPDM:
142 case OMAP_OHCI_PORT_MODE_TLL_6PIN_DATSE0:
143 case OMAP_OHCI_PORT_MODE_TLL_6PIN_DPDM:
144 case OMAP_OHCI_PORT_MODE_TLL_3PIN_DATSE0:
145 case OMAP_OHCI_PORT_MODE_TLL_4PIN_DPDM:
146 case OMAP_OHCI_PORT_MODE_TLL_2PIN_DATSE0:
147 case OMAP_OHCI_PORT_MODE_TLL_2PIN_DPDM:
156 * convert the port-mode enum to a value we can use in the FSLSMODE
157 * field of USBTLL_CHANNEL_CONF
159 static unsigned ohci_omap3_fslsmode(enum usbhs_omap_port_mode mode)
162 case OMAP_USBHS_PORT_MODE_UNUSED:
163 case OMAP_OHCI_PORT_MODE_PHY_6PIN_DATSE0:
164 return OMAP_TLL_FSLSMODE_6PIN_PHY_DAT_SE0;
166 case OMAP_OHCI_PORT_MODE_PHY_6PIN_DPDM:
167 return OMAP_TLL_FSLSMODE_6PIN_PHY_DP_DM;
169 case OMAP_OHCI_PORT_MODE_PHY_3PIN_DATSE0:
170 return OMAP_TLL_FSLSMODE_3PIN_PHY;
172 case OMAP_OHCI_PORT_MODE_PHY_4PIN_DPDM:
173 return OMAP_TLL_FSLSMODE_4PIN_PHY;
175 case OMAP_OHCI_PORT_MODE_TLL_6PIN_DATSE0:
176 return OMAP_TLL_FSLSMODE_6PIN_TLL_DAT_SE0;
178 case OMAP_OHCI_PORT_MODE_TLL_6PIN_DPDM:
179 return OMAP_TLL_FSLSMODE_6PIN_TLL_DP_DM;
181 case OMAP_OHCI_PORT_MODE_TLL_3PIN_DATSE0:
182 return OMAP_TLL_FSLSMODE_3PIN_TLL;
184 case OMAP_OHCI_PORT_MODE_TLL_4PIN_DPDM:
185 return OMAP_TLL_FSLSMODE_4PIN_TLL;
187 case OMAP_OHCI_PORT_MODE_TLL_2PIN_DATSE0:
188 return OMAP_TLL_FSLSMODE_2PIN_TLL_DAT_SE0;
190 case OMAP_OHCI_PORT_MODE_TLL_2PIN_DPDM:
191 return OMAP_TLL_FSLSMODE_2PIN_DAT_DP_DM;
193 pr_warn("Invalid port mode, using default\n");
194 return OMAP_TLL_FSLSMODE_6PIN_PHY_DAT_SE0;
199 * usbtll_omap_probe - initialize TI-based HCDs
201 * Allocates basic resources for this USB host controller.
203 static int usbtll_omap_probe(struct platform_device *pdev)
205 struct device *dev = &pdev->dev;
206 struct usbhs_omap_platform_data *pdata = dev->platform_data;
208 struct resource *res;
209 struct usbtll_omap *tll;
215 dev_dbg(dev, "starting TI HSUSB TLL Controller\n");
217 tll = kzalloc(sizeof(struct usbtll_omap), GFP_KERNEL);
219 dev_err(dev, "Memory allocation failed\n");
224 spin_lock_init(&tll->lock);
228 tll->usbtll_p1_fck = clk_get(dev, "usb_tll_hs_usb_ch0_clk");
229 if (IS_ERR(tll->usbtll_p1_fck)) {
230 ret = PTR_ERR(tll->usbtll_p1_fck);
231 dev_err(dev, "usbtll_p1_fck failed error:%d\n", ret);
235 tll->usbtll_p2_fck = clk_get(dev, "usb_tll_hs_usb_ch1_clk");
236 if (IS_ERR(tll->usbtll_p2_fck)) {
237 ret = PTR_ERR(tll->usbtll_p2_fck);
238 dev_err(dev, "usbtll_p2_fck failed error:%d\n", ret);
239 goto err_usbtll_p1_fck;
242 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
244 dev_err(dev, "usb tll get resource failed\n");
246 goto err_usbtll_p2_fck;
249 base = ioremap(res->start, resource_size(res));
251 dev_err(dev, "TLL ioremap failed\n");
253 goto err_usbtll_p2_fck;
256 platform_set_drvdata(pdev, tll);
257 pm_runtime_enable(dev);
258 pm_runtime_get_sync(dev);
260 spin_lock_irqsave(&tll->lock, flags);
262 ver = usbtll_read(base, OMAP_USBTLL_REVISION);
264 case OMAP_USBTLL_REV1:
265 case OMAP_USBTLL_REV2:
266 count = OMAP_TLL_CHANNEL_COUNT;
268 case OMAP_USBTLL_REV3:
269 count = OMAP_REV2_TLL_CHANNEL_COUNT;
272 dev_err(dev, "TLL version failed\n");
277 if (is_ehci_tll_mode(pdata->port_mode[0]) ||
278 is_ehci_tll_mode(pdata->port_mode[1]) ||
279 is_ehci_tll_mode(pdata->port_mode[2]) ||
280 is_ohci_port(pdata->port_mode[0]) ||
281 is_ohci_port(pdata->port_mode[1]) ||
282 is_ohci_port(pdata->port_mode[2])) {
284 /* Program Common TLL register */
285 reg = usbtll_read(base, OMAP_TLL_SHARED_CONF);
286 reg |= (OMAP_TLL_SHARED_CONF_FCLK_IS_ON
287 | OMAP_TLL_SHARED_CONF_USB_DIVRATION);
288 reg &= ~OMAP_TLL_SHARED_CONF_USB_90D_DDR_EN;
289 reg &= ~OMAP_TLL_SHARED_CONF_USB_180D_SDR_EN;
291 usbtll_write(base, OMAP_TLL_SHARED_CONF, reg);
293 /* Enable channels now */
294 for (i = 0; i < count; i++) {
295 reg = usbtll_read(base, OMAP_TLL_CHANNEL_CONF(i));
297 if (is_ohci_port(pdata->port_mode[i])) {
298 reg |= ohci_omap3_fslsmode(pdata->port_mode[i])
299 << OMAP_TLL_CHANNEL_CONF_FSLSMODE_SHIFT;
300 reg |= OMAP_TLL_CHANNEL_CONF_CHANMODE_FSLS;
301 } else if (pdata->port_mode[i] ==
302 OMAP_EHCI_PORT_MODE_TLL) {
304 * Disable AutoIdle, BitStuffing
307 reg &= ~(OMAP_TLL_CHANNEL_CONF_UTMIAUTOIDLE
308 | OMAP_TLL_CHANNEL_CONF_ULPINOBITSTUFF
309 | OMAP_TLL_CHANNEL_CONF_ULPIDDRMODE);
313 reg |= OMAP_TLL_CHANNEL_CONF_CHANEN;
314 usbtll_write(base, OMAP_TLL_CHANNEL_CONF(i), reg);
317 OMAP_TLL_ULPI_SCRATCH_REGISTER(i),
323 spin_unlock_irqrestore(&tll->lock, flags);
325 pm_runtime_put_sync(dev);
329 pm_runtime_disable(dev);
332 clk_put(tll->usbtll_p2_fck);
335 clk_put(tll->usbtll_p1_fck);
345 * usbtll_omap_remove - shutdown processing for UHH & TLL HCDs
346 * @pdev: USB Host Controller being removed
348 * Reverses the effect of usbtll_omap_probe().
350 static int usbtll_omap_remove(struct platform_device *pdev)
352 struct usbtll_omap *tll = platform_get_drvdata(pdev);
354 clk_put(tll->usbtll_p2_fck);
355 clk_put(tll->usbtll_p1_fck);
356 pm_runtime_disable(&pdev->dev);
361 static int usbtll_runtime_resume(struct device *dev)
363 struct usbtll_omap *tll = dev_get_drvdata(dev);
364 struct usbhs_omap_platform_data *pdata = tll->pdata;
367 dev_dbg(dev, "usbtll_runtime_resume\n");
370 dev_dbg(dev, "missing platform_data\n");
374 spin_lock_irqsave(&tll->lock, flags);
376 if (is_ehci_tll_mode(pdata->port_mode[0]))
377 clk_enable(tll->usbtll_p1_fck);
379 if (is_ehci_tll_mode(pdata->port_mode[1]))
380 clk_enable(tll->usbtll_p2_fck);
382 spin_unlock_irqrestore(&tll->lock, flags);
387 static int usbtll_runtime_suspend(struct device *dev)
389 struct usbtll_omap *tll = dev_get_drvdata(dev);
390 struct usbhs_omap_platform_data *pdata = tll->pdata;
393 dev_dbg(dev, "usbtll_runtime_suspend\n");
396 dev_dbg(dev, "missing platform_data\n");
400 spin_lock_irqsave(&tll->lock, flags);
402 if (is_ehci_tll_mode(pdata->port_mode[0]))
403 clk_disable(tll->usbtll_p1_fck);
405 if (is_ehci_tll_mode(pdata->port_mode[1]))
406 clk_disable(tll->usbtll_p2_fck);
408 spin_unlock_irqrestore(&tll->lock, flags);
413 static const struct dev_pm_ops usbtllomap_dev_pm_ops = {
414 SET_RUNTIME_PM_OPS(usbtll_runtime_suspend,
415 usbtll_runtime_resume,
419 static struct platform_driver usbtll_omap_driver = {
421 .name = (char *)usbtll_driver_name,
422 .owner = THIS_MODULE,
423 .pm = &usbtllomap_dev_pm_ops,
425 .probe = usbtll_omap_probe,
426 .remove = usbtll_omap_remove,
429 int omap_tll_enable(void)
432 pr_err("missing omap usbhs tll platform_data\n");
435 return pm_runtime_get_sync(&tll_pdev->dev);
437 EXPORT_SYMBOL_GPL(omap_tll_enable);
439 int omap_tll_disable(void)
442 pr_err("missing omap usbhs tll platform_data\n");
445 return pm_runtime_put_sync(&tll_pdev->dev);
447 EXPORT_SYMBOL_GPL(omap_tll_disable);
449 MODULE_AUTHOR("Keshava Munegowda <keshava_mgowda@ti.com>");
450 MODULE_ALIAS("platform:" USBHS_DRIVER_NAME);
451 MODULE_LICENSE("GPL v2");
452 MODULE_DESCRIPTION("usb tll driver for TI OMAP EHCI and OHCI controllers");
454 static int __init omap_usbtll_drvinit(void)
456 return platform_driver_register(&usbtll_omap_driver);
460 * init before usbhs core driver;
461 * The usbtll driver should be initialized before
462 * the usbhs core driver probe function is called.
464 fs_initcall(omap_usbtll_drvinit);
466 static void __exit omap_usbtll_drvexit(void)
468 platform_driver_unregister(&usbtll_omap_driver);
470 module_exit(omap_usbtll_drvexit);