blob: 532eacab6b46ab78c69c9a73079db89bd462a0c8 [file] [log] [blame]
Keshava Munegowda16fa3dc2012-07-16 19:01:08 +05301/**
2 * omap-usb-tll.c - The USB TLL driver for OMAP EHCI & OHCI
3 *
Roger Quadros9f4a3ec2013-01-29 15:00:03 +02004 * Copyright (C) 2012-2013 Texas Instruments Incorporated - http://www.ti.com
Keshava Munegowda16fa3dc2012-07-16 19:01:08 +05305 * Author: Keshava Munegowda <keshava_mgowda@ti.com>
Roger Quadros9f4a3ec2013-01-29 15:00:03 +02006 * Author: Roger Quadros <rogerq@ti.com>
Keshava Munegowda16fa3dc2012-07-16 19:01:08 +05307 *
8 * This program is free software: you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 of
10 * the License as published by the Free Software Foundation.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program. If not, see <http://www.gnu.org/licenses/>.
19 */
20#include <linux/kernel.h>
21#include <linux/module.h>
22#include <linux/types.h>
23#include <linux/slab.h>
24#include <linux/spinlock.h>
25#include <linux/platform_device.h>
26#include <linux/clk.h>
27#include <linux/io.h>
28#include <linux/err.h>
Keshava Munegowda16fa3dc2012-07-16 19:01:08 +053029#include <linux/pm_runtime.h>
Felipe Balbie8c4a7a2012-10-24 14:26:19 -070030#include <linux/platform_data/usb-omap.h>
Roger Quadros48130b82013-01-29 15:20:55 +020031#include <linux/of.h>
Keshava Munegowda16fa3dc2012-07-16 19:01:08 +053032
33#define USBTLL_DRIVER_NAME "usbhs_tll"
34
35/* TLL Register Set */
36#define OMAP_USBTLL_REVISION (0x00)
37#define OMAP_USBTLL_SYSCONFIG (0x10)
38#define OMAP_USBTLL_SYSCONFIG_CACTIVITY (1 << 8)
39#define OMAP_USBTLL_SYSCONFIG_SIDLEMODE (1 << 3)
40#define OMAP_USBTLL_SYSCONFIG_ENAWAKEUP (1 << 2)
41#define OMAP_USBTLL_SYSCONFIG_SOFTRESET (1 << 1)
42#define OMAP_USBTLL_SYSCONFIG_AUTOIDLE (1 << 0)
43
44#define OMAP_USBTLL_SYSSTATUS (0x14)
45#define OMAP_USBTLL_SYSSTATUS_RESETDONE (1 << 0)
46
47#define OMAP_USBTLL_IRQSTATUS (0x18)
48#define OMAP_USBTLL_IRQENABLE (0x1C)
49
50#define OMAP_TLL_SHARED_CONF (0x30)
51#define OMAP_TLL_SHARED_CONF_USB_90D_DDR_EN (1 << 6)
52#define OMAP_TLL_SHARED_CONF_USB_180D_SDR_EN (1 << 5)
53#define OMAP_TLL_SHARED_CONF_USB_DIVRATION (1 << 2)
54#define OMAP_TLL_SHARED_CONF_FCLK_REQ (1 << 1)
55#define OMAP_TLL_SHARED_CONF_FCLK_IS_ON (1 << 0)
56
57#define OMAP_TLL_CHANNEL_CONF(num) (0x040 + 0x004 * num)
58#define OMAP_TLL_CHANNEL_CONF_FSLSMODE_SHIFT 24
Roger Quadros300c2f82012-11-08 16:10:41 +020059#define OMAP_TLL_CHANNEL_CONF_DRVVBUS (1 << 16)
60#define OMAP_TLL_CHANNEL_CONF_CHRGVBUS (1 << 15)
Keshava Munegowda16fa3dc2012-07-16 19:01:08 +053061#define OMAP_TLL_CHANNEL_CONF_ULPINOBITSTUFF (1 << 11)
62#define OMAP_TLL_CHANNEL_CONF_ULPI_ULPIAUTOIDLE (1 << 10)
63#define OMAP_TLL_CHANNEL_CONF_UTMIAUTOIDLE (1 << 9)
64#define OMAP_TLL_CHANNEL_CONF_ULPIDDRMODE (1 << 8)
Roger Quadros300c2f82012-11-08 16:10:41 +020065#define OMAP_TLL_CHANNEL_CONF_MODE_TRANSPARENT_UTMI (2 << 1)
Keshava Munegowda16fa3dc2012-07-16 19:01:08 +053066#define OMAP_TLL_CHANNEL_CONF_CHANMODE_FSLS (1 << 1)
67#define OMAP_TLL_CHANNEL_CONF_CHANEN (1 << 0)
68
69#define OMAP_TLL_FSLSMODE_6PIN_PHY_DAT_SE0 0x0
70#define OMAP_TLL_FSLSMODE_6PIN_PHY_DP_DM 0x1
71#define OMAP_TLL_FSLSMODE_3PIN_PHY 0x2
72#define OMAP_TLL_FSLSMODE_4PIN_PHY 0x3
73#define OMAP_TLL_FSLSMODE_6PIN_TLL_DAT_SE0 0x4
74#define OMAP_TLL_FSLSMODE_6PIN_TLL_DP_DM 0x5
75#define OMAP_TLL_FSLSMODE_3PIN_TLL 0x6
76#define OMAP_TLL_FSLSMODE_4PIN_TLL 0x7
77#define OMAP_TLL_FSLSMODE_2PIN_TLL_DAT_SE0 0xA
78#define OMAP_TLL_FSLSMODE_2PIN_DAT_DP_DM 0xB
79
80#define OMAP_TLL_ULPI_FUNCTION_CTRL(num) (0x804 + 0x100 * num)
81#define OMAP_TLL_ULPI_INTERFACE_CTRL(num) (0x807 + 0x100 * num)
82#define OMAP_TLL_ULPI_OTG_CTRL(num) (0x80A + 0x100 * num)
83#define OMAP_TLL_ULPI_INT_EN_RISE(num) (0x80D + 0x100 * num)
84#define OMAP_TLL_ULPI_INT_EN_FALL(num) (0x810 + 0x100 * num)
85#define OMAP_TLL_ULPI_INT_STATUS(num) (0x813 + 0x100 * num)
86#define OMAP_TLL_ULPI_INT_LATCH(num) (0x814 + 0x100 * num)
87#define OMAP_TLL_ULPI_DEBUG(num) (0x815 + 0x100 * num)
88#define OMAP_TLL_ULPI_SCRATCH_REGISTER(num) (0x816 + 0x100 * num)
89
90#define OMAP_REV2_TLL_CHANNEL_COUNT 2
91#define OMAP_TLL_CHANNEL_COUNT 3
92#define OMAP_TLL_CHANNEL_1_EN_MASK (1 << 0)
93#define OMAP_TLL_CHANNEL_2_EN_MASK (1 << 1)
94#define OMAP_TLL_CHANNEL_3_EN_MASK (1 << 2)
95
96/* Values of USBTLL_REVISION - Note: these are not given in the TRM */
97#define OMAP_USBTLL_REV1 0x00000015 /* OMAP3 */
98#define OMAP_USBTLL_REV2 0x00000018 /* OMAP 3630 */
99#define OMAP_USBTLL_REV3 0x00000004 /* OMAP4 */
Roger Quadros300c2f82012-11-08 16:10:41 +0200100#define OMAP_USBTLL_REV4 0x00000006 /* OMAP5 */
Keshava Munegowda16fa3dc2012-07-16 19:01:08 +0530101
102#define is_ehci_tll_mode(x) (x == OMAP_EHCI_PORT_MODE_TLL)
103
Roger Quadros32a51f22012-11-08 14:40:45 +0200104/* only PHY and UNUSED modes don't need TLL */
105#define omap_usb_mode_needs_tll(x) ((x) != OMAP_USBHS_PORT_MODE_UNUSED &&\
106 (x) != OMAP_EHCI_PORT_MODE_PHY)
107
Keshava Munegowda16fa3dc2012-07-16 19:01:08 +0530108struct usbtll_omap {
Roger Quadros7e0ff1032012-11-26 12:28:44 +0200109 int nch; /* num. of channels */
Roger Quadros0bde3e92012-11-08 13:07:09 +0200110 struct clk **ch_clk;
Roger Quadros9f4a3ec2013-01-29 15:00:03 +0200111 void __iomem *base;
Keshava Munegowda16fa3dc2012-07-16 19:01:08 +0530112};
113
114/*-------------------------------------------------------------------------*/
115
Roger Quadros7ed86192012-11-26 15:26:28 +0200116static const char usbtll_driver_name[] = USBTLL_DRIVER_NAME;
117static struct device *tll_dev;
Roger Quadros66751442012-11-26 16:56:26 +0200118static DEFINE_SPINLOCK(tll_lock); /* serialize access to tll_dev */
Keshava Munegowda16fa3dc2012-07-16 19:01:08 +0530119
120/*-------------------------------------------------------------------------*/
121
122static inline void usbtll_write(void __iomem *base, u32 reg, u32 val)
123{
Victor Kamenskydd6eb262013-11-16 02:01:15 +0200124 writel_relaxed(val, base + reg);
Keshava Munegowda16fa3dc2012-07-16 19:01:08 +0530125}
126
127static inline u32 usbtll_read(void __iomem *base, u32 reg)
128{
Victor Kamenskydd6eb262013-11-16 02:01:15 +0200129 return readl_relaxed(base + reg);
Keshava Munegowda16fa3dc2012-07-16 19:01:08 +0530130}
131
132static inline void usbtll_writeb(void __iomem *base, u8 reg, u8 val)
133{
Victor Kamenskydd6eb262013-11-16 02:01:15 +0200134 writeb_relaxed(val, base + reg);
Keshava Munegowda16fa3dc2012-07-16 19:01:08 +0530135}
136
137static inline u8 usbtll_readb(void __iomem *base, u8 reg)
138{
Victor Kamenskydd6eb262013-11-16 02:01:15 +0200139 return readb_relaxed(base + reg);
Keshava Munegowda16fa3dc2012-07-16 19:01:08 +0530140}
141
142/*-------------------------------------------------------------------------*/
143
144static bool is_ohci_port(enum usbhs_omap_port_mode pmode)
145{
146 switch (pmode) {
147 case OMAP_OHCI_PORT_MODE_PHY_6PIN_DATSE0:
148 case OMAP_OHCI_PORT_MODE_PHY_6PIN_DPDM:
149 case OMAP_OHCI_PORT_MODE_PHY_3PIN_DATSE0:
150 case OMAP_OHCI_PORT_MODE_PHY_4PIN_DPDM:
151 case OMAP_OHCI_PORT_MODE_TLL_6PIN_DATSE0:
152 case OMAP_OHCI_PORT_MODE_TLL_6PIN_DPDM:
153 case OMAP_OHCI_PORT_MODE_TLL_3PIN_DATSE0:
154 case OMAP_OHCI_PORT_MODE_TLL_4PIN_DPDM:
155 case OMAP_OHCI_PORT_MODE_TLL_2PIN_DATSE0:
156 case OMAP_OHCI_PORT_MODE_TLL_2PIN_DPDM:
157 return true;
158
159 default:
160 return false;
161 }
162}
163
164/*
165 * convert the port-mode enum to a value we can use in the FSLSMODE
166 * field of USBTLL_CHANNEL_CONF
167 */
168static unsigned ohci_omap3_fslsmode(enum usbhs_omap_port_mode mode)
169{
170 switch (mode) {
171 case OMAP_USBHS_PORT_MODE_UNUSED:
172 case OMAP_OHCI_PORT_MODE_PHY_6PIN_DATSE0:
173 return OMAP_TLL_FSLSMODE_6PIN_PHY_DAT_SE0;
174
175 case OMAP_OHCI_PORT_MODE_PHY_6PIN_DPDM:
176 return OMAP_TLL_FSLSMODE_6PIN_PHY_DP_DM;
177
178 case OMAP_OHCI_PORT_MODE_PHY_3PIN_DATSE0:
179 return OMAP_TLL_FSLSMODE_3PIN_PHY;
180
181 case OMAP_OHCI_PORT_MODE_PHY_4PIN_DPDM:
182 return OMAP_TLL_FSLSMODE_4PIN_PHY;
183
184 case OMAP_OHCI_PORT_MODE_TLL_6PIN_DATSE0:
185 return OMAP_TLL_FSLSMODE_6PIN_TLL_DAT_SE0;
186
187 case OMAP_OHCI_PORT_MODE_TLL_6PIN_DPDM:
188 return OMAP_TLL_FSLSMODE_6PIN_TLL_DP_DM;
189
190 case OMAP_OHCI_PORT_MODE_TLL_3PIN_DATSE0:
191 return OMAP_TLL_FSLSMODE_3PIN_TLL;
192
193 case OMAP_OHCI_PORT_MODE_TLL_4PIN_DPDM:
194 return OMAP_TLL_FSLSMODE_4PIN_TLL;
195
196 case OMAP_OHCI_PORT_MODE_TLL_2PIN_DATSE0:
197 return OMAP_TLL_FSLSMODE_2PIN_TLL_DAT_SE0;
198
199 case OMAP_OHCI_PORT_MODE_TLL_2PIN_DPDM:
200 return OMAP_TLL_FSLSMODE_2PIN_DAT_DP_DM;
201 default:
202 pr_warn("Invalid port mode, using default\n");
203 return OMAP_TLL_FSLSMODE_6PIN_PHY_DAT_SE0;
204 }
205}
206
207/**
208 * usbtll_omap_probe - initialize TI-based HCDs
209 *
210 * Allocates basic resources for this USB host controller.
211 */
Bill Pembertonf791be42012-11-19 13:23:04 -0500212static int usbtll_omap_probe(struct platform_device *pdev)
Keshava Munegowda16fa3dc2012-07-16 19:01:08 +0530213{
214 struct device *dev = &pdev->dev;
Keshava Munegowda16fa3dc2012-07-16 19:01:08 +0530215 struct resource *res;
216 struct usbtll_omap *tll;
Keshava Munegowda16fa3dc2012-07-16 19:01:08 +0530217 int ret = 0;
Roger Quadros7e0ff1032012-11-26 12:28:44 +0200218 int i, ver;
Keshava Munegowda16fa3dc2012-07-16 19:01:08 +0530219
220 dev_dbg(dev, "starting TI HSUSB TLL Controller\n");
221
Roger Quadros1a7a8d72012-11-26 12:56:37 +0200222 tll = devm_kzalloc(dev, sizeof(struct usbtll_omap), GFP_KERNEL);
Keshava Munegowda16fa3dc2012-07-16 19:01:08 +0530223 if (!tll) {
224 dev_err(dev, "Memory allocation failed\n");
Roger Quadros1a7a8d72012-11-26 12:56:37 +0200225 return -ENOMEM;
Keshava Munegowda16fa3dc2012-07-16 19:01:08 +0530226 }
227
Keshava Munegowda16fa3dc2012-07-16 19:01:08 +0530228 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
Sachin Kamat651da3d2013-04-09 16:16:37 +0530229 tll->base = devm_ioremap_resource(dev, res);
230 if (IS_ERR(tll->base))
231 return PTR_ERR(tll->base);
Keshava Munegowda16fa3dc2012-07-16 19:01:08 +0530232
233 platform_set_drvdata(pdev, tll);
234 pm_runtime_enable(dev);
235 pm_runtime_get_sync(dev);
236
Roger Quadros9f4a3ec2013-01-29 15:00:03 +0200237 ver = usbtll_read(tll->base, OMAP_USBTLL_REVISION);
Keshava Munegowda16fa3dc2012-07-16 19:01:08 +0530238 switch (ver) {
239 case OMAP_USBTLL_REV1:
Roger Quadros300c2f82012-11-08 16:10:41 +0200240 case OMAP_USBTLL_REV4:
Roger Quadros7e0ff1032012-11-26 12:28:44 +0200241 tll->nch = OMAP_TLL_CHANNEL_COUNT;
Keshava Munegowda16fa3dc2012-07-16 19:01:08 +0530242 break;
Roger Quadros7e0ff1032012-11-26 12:28:44 +0200243 case OMAP_USBTLL_REV2:
Keshava Munegowda16fa3dc2012-07-16 19:01:08 +0530244 case OMAP_USBTLL_REV3:
Roger Quadros7e0ff1032012-11-26 12:28:44 +0200245 tll->nch = OMAP_REV2_TLL_CHANNEL_COUNT;
Keshava Munegowda16fa3dc2012-07-16 19:01:08 +0530246 break;
247 default:
Roger Quadros7e0ff1032012-11-26 12:28:44 +0200248 tll->nch = OMAP_TLL_CHANNEL_COUNT;
249 dev_dbg(dev,
250 "USB TLL Rev : 0x%x not recognized, assuming %d channels\n",
251 ver, tll->nch);
252 break;
Keshava Munegowda16fa3dc2012-07-16 19:01:08 +0530253 }
254
Colin Ian King39a85bc2014-02-11 09:38:53 +0000255 tll->ch_clk = devm_kzalloc(dev, sizeof(struct clk *) * tll->nch,
Roger Quadros0bde3e92012-11-08 13:07:09 +0200256 GFP_KERNEL);
257 if (!tll->ch_clk) {
258 ret = -ENOMEM;
259 dev_err(dev, "Couldn't allocate memory for channel clocks\n");
260 goto err_clk_alloc;
261 }
262
263 for (i = 0; i < tll->nch; i++) {
264 char clkname[] = "usb_tll_hs_usb_chx_clk";
265
266 snprintf(clkname, sizeof(clkname),
267 "usb_tll_hs_usb_ch%d_clk", i);
268 tll->ch_clk[i] = clk_get(dev, clkname);
269
270 if (IS_ERR(tll->ch_clk[i]))
271 dev_dbg(dev, "can't get clock : %s\n", clkname);
272 }
273
Roger Quadros9f4a3ec2013-01-29 15:00:03 +0200274 pm_runtime_put_sync(dev);
275 /* only after this can omap_tll_enable/disable work */
276 spin_lock(&tll_lock);
277 tll_dev = dev;
278 spin_unlock(&tll_lock);
279
280 return 0;
281
282err_clk_alloc:
283 pm_runtime_put_sync(dev);
284 pm_runtime_disable(dev);
285
286 return ret;
287}
288
289/**
290 * usbtll_omap_remove - shutdown processing for UHH & TLL HCDs
291 * @pdev: USB Host Controller being removed
292 *
293 * Reverses the effect of usbtll_omap_probe().
294 */
295static int usbtll_omap_remove(struct platform_device *pdev)
296{
297 struct usbtll_omap *tll = platform_get_drvdata(pdev);
298 int i;
299
300 spin_lock(&tll_lock);
301 tll_dev = NULL;
302 spin_unlock(&tll_lock);
303
304 for (i = 0; i < tll->nch; i++)
305 if (!IS_ERR(tll->ch_clk[i]))
306 clk_put(tll->ch_clk[i]);
307
308 pm_runtime_disable(&pdev->dev);
309 return 0;
310}
311
Roger Quadros48130b82013-01-29 15:20:55 +0200312static const struct of_device_id usbtll_omap_dt_ids[] = {
313 { .compatible = "ti,usbhs-tll" },
314 { }
315};
316
317MODULE_DEVICE_TABLE(of, usbtll_omap_dt_ids);
318
Roger Quadros9f4a3ec2013-01-29 15:00:03 +0200319static struct platform_driver usbtll_omap_driver = {
320 .driver = {
321 .name = (char *)usbtll_driver_name,
322 .owner = THIS_MODULE,
Sachin Kamat0f54e1e2013-10-15 09:18:50 +0530323 .of_match_table = usbtll_omap_dt_ids,
Roger Quadros9f4a3ec2013-01-29 15:00:03 +0200324 },
325 .probe = usbtll_omap_probe,
326 .remove = usbtll_omap_remove,
327};
328
329int omap_tll_init(struct usbhs_omap_platform_data *pdata)
330{
331 int i;
332 bool needs_tll;
333 unsigned reg;
334 struct usbtll_omap *tll;
335
Roger Quadros76a07752014-01-08 12:45:33 +0530336 if (!tll_dev)
Roger Quadros9f4a3ec2013-01-29 15:00:03 +0200337 return -ENODEV;
Roger Quadros9f4a3ec2013-01-29 15:00:03 +0200338
Roger Quadros76a07752014-01-08 12:45:33 +0530339 pm_runtime_get_sync(tll_dev);
340
341 spin_lock(&tll_lock);
Roger Quadros9f4a3ec2013-01-29 15:00:03 +0200342 tll = dev_get_drvdata(tll_dev);
Roger Quadros32a51f22012-11-08 14:40:45 +0200343 needs_tll = false;
344 for (i = 0; i < tll->nch; i++)
345 needs_tll |= omap_usb_mode_needs_tll(pdata->port_mode[i]);
346
347 if (needs_tll) {
Roger Quadros9f4a3ec2013-01-29 15:00:03 +0200348 void __iomem *base = tll->base;
Keshava Munegowda16fa3dc2012-07-16 19:01:08 +0530349
350 /* Program Common TLL register */
351 reg = usbtll_read(base, OMAP_TLL_SHARED_CONF);
352 reg |= (OMAP_TLL_SHARED_CONF_FCLK_IS_ON
353 | OMAP_TLL_SHARED_CONF_USB_DIVRATION);
354 reg &= ~OMAP_TLL_SHARED_CONF_USB_90D_DDR_EN;
355 reg &= ~OMAP_TLL_SHARED_CONF_USB_180D_SDR_EN;
356
357 usbtll_write(base, OMAP_TLL_SHARED_CONF, reg);
358
359 /* Enable channels now */
Roger Quadros7e0ff1032012-11-26 12:28:44 +0200360 for (i = 0; i < tll->nch; i++) {
Keshava Munegowda16fa3dc2012-07-16 19:01:08 +0530361 reg = usbtll_read(base, OMAP_TLL_CHANNEL_CONF(i));
362
363 if (is_ohci_port(pdata->port_mode[i])) {
364 reg |= ohci_omap3_fslsmode(pdata->port_mode[i])
365 << OMAP_TLL_CHANNEL_CONF_FSLSMODE_SHIFT;
366 reg |= OMAP_TLL_CHANNEL_CONF_CHANMODE_FSLS;
367 } else if (pdata->port_mode[i] ==
368 OMAP_EHCI_PORT_MODE_TLL) {
369 /*
370 * Disable AutoIdle, BitStuffing
371 * and use SDR Mode
372 */
373 reg &= ~(OMAP_TLL_CHANNEL_CONF_UTMIAUTOIDLE
374 | OMAP_TLL_CHANNEL_CONF_ULPINOBITSTUFF
375 | OMAP_TLL_CHANNEL_CONF_ULPIDDRMODE);
Roger Quadros300c2f82012-11-08 16:10:41 +0200376 } else if (pdata->port_mode[i] ==
377 OMAP_EHCI_PORT_MODE_HSIC) {
378 /*
379 * HSIC Mode requires UTMI port configurations
380 */
381 reg |= OMAP_TLL_CHANNEL_CONF_DRVVBUS
382 | OMAP_TLL_CHANNEL_CONF_CHRGVBUS
383 | OMAP_TLL_CHANNEL_CONF_MODE_TRANSPARENT_UTMI
384 | OMAP_TLL_CHANNEL_CONF_ULPINOBITSTUFF;
Keshava Munegowda16fa3dc2012-07-16 19:01:08 +0530385 } else {
386 continue;
387 }
388 reg |= OMAP_TLL_CHANNEL_CONF_CHANEN;
389 usbtll_write(base, OMAP_TLL_CHANNEL_CONF(i), reg);
390
391 usbtll_writeb(base,
392 OMAP_TLL_ULPI_SCRATCH_REGISTER(i),
393 0xbe);
394 }
395 }
396
Roger Quadros66751442012-11-26 16:56:26 +0200397 spin_unlock(&tll_lock);
Roger Quadros76a07752014-01-08 12:45:33 +0530398 pm_runtime_put_sync(tll_dev);
Keshava Munegowda16fa3dc2012-07-16 19:01:08 +0530399
Roger Quadros1a7a8d72012-11-26 12:56:37 +0200400 return 0;
Keshava Munegowda16fa3dc2012-07-16 19:01:08 +0530401}
Roger Quadros9f4a3ec2013-01-29 15:00:03 +0200402EXPORT_SYMBOL_GPL(omap_tll_init);
Keshava Munegowda16fa3dc2012-07-16 19:01:08 +0530403
Roger Quadros9f4a3ec2013-01-29 15:00:03 +0200404int omap_tll_enable(struct usbhs_omap_platform_data *pdata)
Keshava Munegowda16fa3dc2012-07-16 19:01:08 +0530405{
Roger Quadros0bde3e92012-11-08 13:07:09 +0200406 int i;
Roger Quadros9f4a3ec2013-01-29 15:00:03 +0200407 struct usbtll_omap *tll;
Keshava Munegowda16fa3dc2012-07-16 19:01:08 +0530408
Roger Quadros76a07752014-01-08 12:45:33 +0530409 if (!tll_dev)
Roger Quadros9f4a3ec2013-01-29 15:00:03 +0200410 return -ENODEV;
Keshava Munegowda16fa3dc2012-07-16 19:01:08 +0530411
Roger Quadros9f4a3ec2013-01-29 15:00:03 +0200412 pm_runtime_get_sync(tll_dev);
Keshava Munegowda16fa3dc2012-07-16 19:01:08 +0530413
Roger Quadros76a07752014-01-08 12:45:33 +0530414 spin_lock(&tll_lock);
415 tll = dev_get_drvdata(tll_dev);
416
Roger Quadros0bde3e92012-11-08 13:07:09 +0200417 for (i = 0; i < tll->nch; i++) {
Roger Quadros32a51f22012-11-08 14:40:45 +0200418 if (omap_usb_mode_needs_tll(pdata->port_mode[i])) {
Roger Quadros0bde3e92012-11-08 13:07:09 +0200419 int r;
Keshava Munegowda16fa3dc2012-07-16 19:01:08 +0530420
Roger Quadros0bde3e92012-11-08 13:07:09 +0200421 if (IS_ERR(tll->ch_clk[i]))
422 continue;
423
Roger Quadrosb0e59922013-10-15 15:30:34 +0300424 r = clk_prepare_enable(tll->ch_clk[i]);
Roger Quadros0bde3e92012-11-08 13:07:09 +0200425 if (r) {
Roger Quadros9f4a3ec2013-01-29 15:00:03 +0200426 dev_err(tll_dev,
Roger Quadros0bde3e92012-11-08 13:07:09 +0200427 "Error enabling ch %d clock: %d\n", i, r);
428 }
429 }
430 }
Keshava Munegowda16fa3dc2012-07-16 19:01:08 +0530431
Roger Quadros9f4a3ec2013-01-29 15:00:03 +0200432 spin_unlock(&tll_lock);
433
Keshava Munegowda16fa3dc2012-07-16 19:01:08 +0530434 return 0;
435}
Roger Quadros9f4a3ec2013-01-29 15:00:03 +0200436EXPORT_SYMBOL_GPL(omap_tll_enable);
Keshava Munegowda16fa3dc2012-07-16 19:01:08 +0530437
Roger Quadros9f4a3ec2013-01-29 15:00:03 +0200438int omap_tll_disable(struct usbhs_omap_platform_data *pdata)
Keshava Munegowda16fa3dc2012-07-16 19:01:08 +0530439{
Roger Quadros0bde3e92012-11-08 13:07:09 +0200440 int i;
Roger Quadros9f4a3ec2013-01-29 15:00:03 +0200441 struct usbtll_omap *tll;
Keshava Munegowda16fa3dc2012-07-16 19:01:08 +0530442
Roger Quadros76a07752014-01-08 12:45:33 +0530443 if (!tll_dev)
Roger Quadros9f4a3ec2013-01-29 15:00:03 +0200444 return -ENODEV;
Roger Quadros9f4a3ec2013-01-29 15:00:03 +0200445
Roger Quadros76a07752014-01-08 12:45:33 +0530446 spin_lock(&tll_lock);
Roger Quadros9f4a3ec2013-01-29 15:00:03 +0200447 tll = dev_get_drvdata(tll_dev);
Keshava Munegowda16fa3dc2012-07-16 19:01:08 +0530448
Roger Quadros0bde3e92012-11-08 13:07:09 +0200449 for (i = 0; i < tll->nch; i++) {
Roger Quadros32a51f22012-11-08 14:40:45 +0200450 if (omap_usb_mode_needs_tll(pdata->port_mode[i])) {
Roger Quadros0bde3e92012-11-08 13:07:09 +0200451 if (!IS_ERR(tll->ch_clk[i]))
Roger Quadrosb0e59922013-10-15 15:30:34 +0300452 clk_disable_unprepare(tll->ch_clk[i]);
Roger Quadros0bde3e92012-11-08 13:07:09 +0200453 }
454 }
Keshava Munegowda16fa3dc2012-07-16 19:01:08 +0530455
Roger Quadros9f4a3ec2013-01-29 15:00:03 +0200456 spin_unlock(&tll_lock);
Roger Quadros76a07752014-01-08 12:45:33 +0530457 pm_runtime_put_sync(tll_dev);
Roger Quadros9f4a3ec2013-01-29 15:00:03 +0200458
Keshava Munegowda16fa3dc2012-07-16 19:01:08 +0530459 return 0;
460}
Keshava Munegowda16fa3dc2012-07-16 19:01:08 +0530461EXPORT_SYMBOL_GPL(omap_tll_disable);
462
463MODULE_AUTHOR("Keshava Munegowda <keshava_mgowda@ti.com>");
Roger Quadros48130b82013-01-29 15:20:55 +0200464MODULE_AUTHOR("Roger Quadros <rogerq@ti.com>");
Keshava Munegowda16fa3dc2012-07-16 19:01:08 +0530465MODULE_ALIAS("platform:" USBHS_DRIVER_NAME);
466MODULE_LICENSE("GPL v2");
467MODULE_DESCRIPTION("usb tll driver for TI OMAP EHCI and OHCI controllers");
468
469static int __init omap_usbtll_drvinit(void)
470{
471 return platform_driver_register(&usbtll_omap_driver);
472}
473
474/*
475 * init before usbhs core driver;
476 * The usbtll driver should be initialized before
477 * the usbhs core driver probe function is called.
478 */
479fs_initcall(omap_usbtll_drvinit);
480
481static void __exit omap_usbtll_drvexit(void)
482{
483 platform_driver_unregister(&usbtll_omap_driver);
484}
485module_exit(omap_usbtll_drvexit);