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16fa3dc7 KM |
1 | /** |
2 | * omap-usb-tll.c - The USB TLL driver for OMAP EHCI & OHCI | |
3 | * | |
9f4a3ece | 4 | * Copyright (C) 2012-2013 Texas Instruments Incorporated - http://www.ti.com |
16fa3dc7 | 5 | * Author: Keshava Munegowda <keshava_mgowda@ti.com> |
9f4a3ece | 6 | * Author: Roger Quadros <rogerq@ti.com> |
16fa3dc7 KM |
7 | * |
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> | |
16fa3dc7 | 29 | #include <linux/pm_runtime.h> |
e8c4a7ac | 30 | #include <linux/platform_data/usb-omap.h> |
48130b8f | 31 | #include <linux/of.h> |
16fa3dc7 KM |
32 | |
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 | |
300c2f8f RQ |
59 | #define OMAP_TLL_CHANNEL_CONF_DRVVBUS (1 << 16) |
60 | #define OMAP_TLL_CHANNEL_CONF_CHRGVBUS (1 << 15) | |
16fa3dc7 KM |
61 | #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) | |
300c2f8f | 65 | #define OMAP_TLL_CHANNEL_CONF_MODE_TRANSPARENT_UTMI (2 << 1) |
16fa3dc7 KM |
66 | #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 */ | |
300c2f8f | 100 | #define OMAP_USBTLL_REV4 0x00000006 /* OMAP5 */ |
16fa3dc7 KM |
101 | |
102 | #define is_ehci_tll_mode(x) (x == OMAP_EHCI_PORT_MODE_TLL) | |
103 | ||
32a51f2a RQ |
104 | /* 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 | ||
16fa3dc7 | 108 | struct usbtll_omap { |
7e0ff103 | 109 | int nch; /* num. of channels */ |
0bde3e9f | 110 | struct clk **ch_clk; |
9f4a3ece | 111 | void __iomem *base; |
16fa3dc7 KM |
112 | }; |
113 | ||
114 | /*-------------------------------------------------------------------------*/ | |
115 | ||
7ed86191 RQ |
116 | static const char usbtll_driver_name[] = USBTLL_DRIVER_NAME; |
117 | static struct device *tll_dev; | |
66751446 | 118 | static DEFINE_SPINLOCK(tll_lock); /* serialize access to tll_dev */ |
16fa3dc7 KM |
119 | |
120 | /*-------------------------------------------------------------------------*/ | |
121 | ||
122 | static inline void usbtll_write(void __iomem *base, u32 reg, u32 val) | |
123 | { | |
dd6eb26f | 124 | writel_relaxed(val, base + reg); |
16fa3dc7 KM |
125 | } |
126 | ||
127 | static inline u32 usbtll_read(void __iomem *base, u32 reg) | |
128 | { | |
dd6eb26f | 129 | return readl_relaxed(base + reg); |
16fa3dc7 KM |
130 | } |
131 | ||
132 | static inline void usbtll_writeb(void __iomem *base, u8 reg, u8 val) | |
133 | { | |
dd6eb26f | 134 | writeb_relaxed(val, base + reg); |
16fa3dc7 KM |
135 | } |
136 | ||
137 | static inline u8 usbtll_readb(void __iomem *base, u8 reg) | |
138 | { | |
dd6eb26f | 139 | return readb_relaxed(base + reg); |
16fa3dc7 KM |
140 | } |
141 | ||
142 | /*-------------------------------------------------------------------------*/ | |
143 | ||
144 | static 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 | */ | |
168 | static 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 | */ | |
f791be49 | 212 | static int usbtll_omap_probe(struct platform_device *pdev) |
16fa3dc7 KM |
213 | { |
214 | struct device *dev = &pdev->dev; | |
16fa3dc7 KM |
215 | struct resource *res; |
216 | struct usbtll_omap *tll; | |
16fa3dc7 | 217 | int ret = 0; |
7e0ff103 | 218 | int i, ver; |
16fa3dc7 KM |
219 | |
220 | dev_dbg(dev, "starting TI HSUSB TLL Controller\n"); | |
221 | ||
1a7a8d70 | 222 | tll = devm_kzalloc(dev, sizeof(struct usbtll_omap), GFP_KERNEL); |
16fa3dc7 KM |
223 | if (!tll) { |
224 | dev_err(dev, "Memory allocation failed\n"); | |
1a7a8d70 | 225 | return -ENOMEM; |
16fa3dc7 KM |
226 | } |
227 | ||
16fa3dc7 | 228 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
651da3d4 SK |
229 | tll->base = devm_ioremap_resource(dev, res); |
230 | if (IS_ERR(tll->base)) | |
231 | return PTR_ERR(tll->base); | |
16fa3dc7 KM |
232 | |
233 | platform_set_drvdata(pdev, tll); | |
234 | pm_runtime_enable(dev); | |
235 | pm_runtime_get_sync(dev); | |
236 | ||
9f4a3ece | 237 | ver = usbtll_read(tll->base, OMAP_USBTLL_REVISION); |
16fa3dc7 KM |
238 | switch (ver) { |
239 | case OMAP_USBTLL_REV1: | |
300c2f8f | 240 | case OMAP_USBTLL_REV4: |
7e0ff103 | 241 | tll->nch = OMAP_TLL_CHANNEL_COUNT; |
16fa3dc7 | 242 | break; |
7e0ff103 | 243 | case OMAP_USBTLL_REV2: |
16fa3dc7 | 244 | case OMAP_USBTLL_REV3: |
7e0ff103 | 245 | tll->nch = OMAP_REV2_TLL_CHANNEL_COUNT; |
16fa3dc7 KM |
246 | break; |
247 | default: | |
7e0ff103 RQ |
248 | 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; | |
16fa3dc7 KM |
253 | } |
254 | ||
0bde3e9f RQ |
255 | tll->ch_clk = devm_kzalloc(dev, sizeof(struct clk * [tll->nch]), |
256 | 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 | ||
9f4a3ece RQ |
274 | 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 | ||
282 | err_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 | */ | |
295 | static 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 | ||
48130b8f RQ |
312 | static const struct of_device_id usbtll_omap_dt_ids[] = { |
313 | { .compatible = "ti,usbhs-tll" }, | |
314 | { } | |
315 | }; | |
316 | ||
317 | MODULE_DEVICE_TABLE(of, usbtll_omap_dt_ids); | |
318 | ||
9f4a3ece RQ |
319 | static struct platform_driver usbtll_omap_driver = { |
320 | .driver = { | |
321 | .name = (char *)usbtll_driver_name, | |
322 | .owner = THIS_MODULE, | |
0f54e1e1 | 323 | .of_match_table = usbtll_omap_dt_ids, |
9f4a3ece RQ |
324 | }, |
325 | .probe = usbtll_omap_probe, | |
326 | .remove = usbtll_omap_remove, | |
327 | }; | |
328 | ||
329 | int 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 | ||
76a0775d | 336 | if (!tll_dev) |
9f4a3ece | 337 | return -ENODEV; |
9f4a3ece | 338 | |
76a0775d | 339 | pm_runtime_get_sync(tll_dev); |
9f4a3ece | 340 | |
76a0775d RQ |
341 | spin_lock(&tll_lock); |
342 | tll = dev_get_drvdata(tll_dev); | |
32a51f2a RQ |
343 | 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) { | |
9f4a3ece | 348 | void __iomem *base = tll->base; |
16fa3dc7 KM |
349 | |
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 */ | |
7e0ff103 | 360 | for (i = 0; i < tll->nch; i++) { |
16fa3dc7 KM |
361 | 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); | |
300c2f8f RQ |
376 | } 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; | |
16fa3dc7 KM |
385 | } 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 | ||
66751446 | 397 | spin_unlock(&tll_lock); |
76a0775d | 398 | pm_runtime_put_sync(tll_dev); |
16fa3dc7 | 399 | |
1a7a8d70 | 400 | return 0; |
16fa3dc7 | 401 | } |
9f4a3ece | 402 | EXPORT_SYMBOL_GPL(omap_tll_init); |
16fa3dc7 | 403 | |
9f4a3ece | 404 | int omap_tll_enable(struct usbhs_omap_platform_data *pdata) |
16fa3dc7 | 405 | { |
0bde3e9f | 406 | int i; |
9f4a3ece | 407 | struct usbtll_omap *tll; |
0bde3e9f | 408 | |
76a0775d | 409 | if (!tll_dev) |
9f4a3ece | 410 | return -ENODEV; |
16fa3dc7 | 411 | |
9f4a3ece | 412 | pm_runtime_get_sync(tll_dev); |
16fa3dc7 | 413 | |
76a0775d RQ |
414 | spin_lock(&tll_lock); |
415 | tll = dev_get_drvdata(tll_dev); | |
416 | ||
0bde3e9f | 417 | for (i = 0; i < tll->nch; i++) { |
32a51f2a | 418 | if (omap_usb_mode_needs_tll(pdata->port_mode[i])) { |
0bde3e9f | 419 | int r; |
16fa3dc7 | 420 | |
0bde3e9f RQ |
421 | if (IS_ERR(tll->ch_clk[i])) |
422 | continue; | |
423 | ||
b0e59926 | 424 | r = clk_prepare_enable(tll->ch_clk[i]); |
0bde3e9f | 425 | if (r) { |
9f4a3ece | 426 | dev_err(tll_dev, |
0bde3e9f RQ |
427 | "Error enabling ch %d clock: %d\n", i, r); |
428 | } | |
429 | } | |
430 | } | |
16fa3dc7 | 431 | |
9f4a3ece RQ |
432 | spin_unlock(&tll_lock); |
433 | ||
16fa3dc7 KM |
434 | return 0; |
435 | } | |
9f4a3ece | 436 | EXPORT_SYMBOL_GPL(omap_tll_enable); |
16fa3dc7 | 437 | |
9f4a3ece | 438 | int omap_tll_disable(struct usbhs_omap_platform_data *pdata) |
16fa3dc7 | 439 | { |
0bde3e9f | 440 | int i; |
9f4a3ece RQ |
441 | struct usbtll_omap *tll; |
442 | ||
76a0775d | 443 | if (!tll_dev) |
9f4a3ece | 444 | return -ENODEV; |
16fa3dc7 | 445 | |
76a0775d | 446 | spin_lock(&tll_lock); |
9f4a3ece | 447 | tll = dev_get_drvdata(tll_dev); |
16fa3dc7 | 448 | |
0bde3e9f | 449 | for (i = 0; i < tll->nch; i++) { |
32a51f2a | 450 | if (omap_usb_mode_needs_tll(pdata->port_mode[i])) { |
0bde3e9f | 451 | if (!IS_ERR(tll->ch_clk[i])) |
b0e59926 | 452 | clk_disable_unprepare(tll->ch_clk[i]); |
0bde3e9f RQ |
453 | } |
454 | } | |
16fa3dc7 | 455 | |
66751446 | 456 | spin_unlock(&tll_lock); |
76a0775d | 457 | pm_runtime_put_sync(tll_dev); |
66751446 | 458 | |
9f4a3ece | 459 | return 0; |
16fa3dc7 KM |
460 | } |
461 | EXPORT_SYMBOL_GPL(omap_tll_disable); | |
462 | ||
463 | MODULE_AUTHOR("Keshava Munegowda <keshava_mgowda@ti.com>"); | |
48130b8f | 464 | MODULE_AUTHOR("Roger Quadros <rogerq@ti.com>"); |
16fa3dc7 KM |
465 | MODULE_ALIAS("platform:" USBHS_DRIVER_NAME); |
466 | MODULE_LICENSE("GPL v2"); | |
467 | MODULE_DESCRIPTION("usb tll driver for TI OMAP EHCI and OHCI controllers"); | |
468 | ||
469 | static 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 | */ | |
479 | fs_initcall(omap_usbtll_drvinit); | |
480 | ||
481 | static void __exit omap_usbtll_drvexit(void) | |
482 | { | |
483 | platform_driver_unregister(&usbtll_omap_driver); | |
484 | } | |
485 | module_exit(omap_usbtll_drvexit); |