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17cdd29d KM |
1 | /** |
2 | * omap-usb-host.c - The USBHS core driver for OMAP EHCI & OHCI | |
3 | * | |
03a8f438 | 4 | * Copyright (C) 2011-2013 Texas Instruments Incorporated - http://www.ti.com |
17cdd29d | 5 | * Author: Keshava Munegowda <keshava_mgowda@ti.com> |
03a8f438 | 6 | * Author: Roger Quadros <rogerq@ti.com> |
17cdd29d 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> | |
417e206b | 21 | #include <linux/module.h> |
17cdd29d KM |
22 | #include <linux/types.h> |
23 | #include <linux/slab.h> | |
24 | #include <linux/delay.h> | |
17cdd29d KM |
25 | #include <linux/clk.h> |
26 | #include <linux/dma-mapping.h> | |
c05995c3 | 27 | #include <linux/gpio.h> |
e8c4a7ac FB |
28 | #include <linux/platform_device.h> |
29 | #include <linux/platform_data/usb-omap.h> | |
1e7fe1a9 | 30 | #include <linux/pm_runtime.h> |
03a8f438 RQ |
31 | #include <linux/of.h> |
32 | #include <linux/of_platform.h> | |
d011c450 | 33 | #include <linux/err.h> |
17cdd29d | 34 | |
e8c4a7ac FB |
35 | #include "omap-usb.h" |
36 | ||
a6d3a662 | 37 | #define USBHS_DRIVER_NAME "usbhs_omap" |
17cdd29d KM |
38 | #define OMAP_EHCI_DEVICE "ehci-omap" |
39 | #define OMAP_OHCI_DEVICE "ohci-omap3" | |
40 | ||
41 | /* OMAP USBHOST Register addresses */ | |
42 | ||
17cdd29d KM |
43 | /* UHH Register Set */ |
44 | #define OMAP_UHH_REVISION (0x00) | |
45 | #define OMAP_UHH_SYSCONFIG (0x10) | |
46 | #define OMAP_UHH_SYSCONFIG_MIDLEMODE (1 << 12) | |
47 | #define OMAP_UHH_SYSCONFIG_CACTIVITY (1 << 8) | |
48 | #define OMAP_UHH_SYSCONFIG_SIDLEMODE (1 << 3) | |
49 | #define OMAP_UHH_SYSCONFIG_ENAWAKEUP (1 << 2) | |
50 | #define OMAP_UHH_SYSCONFIG_SOFTRESET (1 << 1) | |
51 | #define OMAP_UHH_SYSCONFIG_AUTOIDLE (1 << 0) | |
52 | ||
53 | #define OMAP_UHH_SYSSTATUS (0x14) | |
54 | #define OMAP_UHH_HOSTCONFIG (0x40) | |
55 | #define OMAP_UHH_HOSTCONFIG_ULPI_BYPASS (1 << 0) | |
56 | #define OMAP_UHH_HOSTCONFIG_ULPI_P1_BYPASS (1 << 0) | |
57 | #define OMAP_UHH_HOSTCONFIG_ULPI_P2_BYPASS (1 << 11) | |
58 | #define OMAP_UHH_HOSTCONFIG_ULPI_P3_BYPASS (1 << 12) | |
59 | #define OMAP_UHH_HOSTCONFIG_INCR4_BURST_EN (1 << 2) | |
60 | #define OMAP_UHH_HOSTCONFIG_INCR8_BURST_EN (1 << 3) | |
61 | #define OMAP_UHH_HOSTCONFIG_INCR16_BURST_EN (1 << 4) | |
62 | #define OMAP_UHH_HOSTCONFIG_INCRX_ALIGN_EN (1 << 5) | |
63 | #define OMAP_UHH_HOSTCONFIG_P1_CONNECT_STATUS (1 << 8) | |
64 | #define OMAP_UHH_HOSTCONFIG_P2_CONNECT_STATUS (1 << 9) | |
65 | #define OMAP_UHH_HOSTCONFIG_P3_CONNECT_STATUS (1 << 10) | |
66 | #define OMAP4_UHH_HOSTCONFIG_APP_START_CLK (1 << 31) | |
67 | ||
68 | /* OMAP4-specific defines */ | |
69 | #define OMAP4_UHH_SYSCONFIG_IDLEMODE_CLEAR (3 << 2) | |
70 | #define OMAP4_UHH_SYSCONFIG_NOIDLE (1 << 2) | |
71 | #define OMAP4_UHH_SYSCONFIG_STDBYMODE_CLEAR (3 << 4) | |
72 | #define OMAP4_UHH_SYSCONFIG_NOSTDBY (1 << 4) | |
73 | #define OMAP4_UHH_SYSCONFIG_SOFTRESET (1 << 0) | |
74 | ||
75 | #define OMAP4_P1_MODE_CLEAR (3 << 16) | |
76 | #define OMAP4_P1_MODE_TLL (1 << 16) | |
77 | #define OMAP4_P1_MODE_HSIC (3 << 16) | |
78 | #define OMAP4_P2_MODE_CLEAR (3 << 18) | |
79 | #define OMAP4_P2_MODE_TLL (1 << 18) | |
80 | #define OMAP4_P2_MODE_HSIC (3 << 18) | |
81 | ||
17cdd29d KM |
82 | #define OMAP_UHH_DEBUG_CSR (0x44) |
83 | ||
84 | /* Values of UHH_REVISION - Note: these are not given in the TRM */ | |
85 | #define OMAP_USBHS_REV1 0x00000010 /* OMAP3 */ | |
86 | #define OMAP_USBHS_REV2 0x50700100 /* OMAP4 */ | |
87 | ||
88 | #define is_omap_usbhs_rev1(x) (x->usbhs_rev == OMAP_USBHS_REV1) | |
89 | #define is_omap_usbhs_rev2(x) (x->usbhs_rev == OMAP_USBHS_REV2) | |
90 | ||
91 | #define is_ehci_phy_mode(x) (x == OMAP_EHCI_PORT_MODE_PHY) | |
92 | #define is_ehci_tll_mode(x) (x == OMAP_EHCI_PORT_MODE_TLL) | |
93 | #define is_ehci_hsic_mode(x) (x == OMAP_EHCI_PORT_MODE_HSIC) | |
94 | ||
95 | ||
96 | struct usbhs_hcd_omap { | |
d7eaf866 | 97 | int nports; |
06ba7dc7 | 98 | struct clk **utmi_clk; |
340c64ea RQ |
99 | struct clk **hsic60m_clk; |
100 | struct clk **hsic480m_clk; | |
d7eaf866 | 101 | |
17cdd29d KM |
102 | struct clk *xclk60mhsp1_ck; |
103 | struct clk *xclk60mhsp2_ck; | |
06ba7dc7 RQ |
104 | struct clk *utmi_p1_gfclk; |
105 | struct clk *utmi_p2_gfclk; | |
17cdd29d | 106 | struct clk *init_60m_fclk; |
1e7fe1a9 | 107 | struct clk *ehci_logic_fck; |
17cdd29d KM |
108 | |
109 | void __iomem *uhh_base; | |
17cdd29d | 110 | |
9d9c6ae7 | 111 | struct usbhs_omap_platform_data *pdata; |
17cdd29d KM |
112 | |
113 | u32 usbhs_rev; | |
17cdd29d KM |
114 | }; |
115 | /*-------------------------------------------------------------------------*/ | |
116 | ||
7844b989 | 117 | static const char usbhs_driver_name[] = USBHS_DRIVER_NAME; |
cbb8c220 | 118 | static u64 usbhs_dmamask = DMA_BIT_MASK(32); |
17cdd29d KM |
119 | |
120 | /*-------------------------------------------------------------------------*/ | |
121 | ||
122 | static inline void usbhs_write(void __iomem *base, u32 reg, u32 val) | |
123 | { | |
9981a314 | 124 | writel_relaxed(val, base + reg); |
17cdd29d KM |
125 | } |
126 | ||
127 | static inline u32 usbhs_read(void __iomem *base, u32 reg) | |
128 | { | |
9981a314 | 129 | return readl_relaxed(base + reg); |
17cdd29d KM |
130 | } |
131 | ||
132 | static inline void usbhs_writeb(void __iomem *base, u8 reg, u8 val) | |
133 | { | |
9981a314 | 134 | writeb_relaxed(val, base + reg); |
17cdd29d KM |
135 | } |
136 | ||
137 | static inline u8 usbhs_readb(void __iomem *base, u8 reg) | |
138 | { | |
9981a314 | 139 | return readb_relaxed(base + reg); |
17cdd29d KM |
140 | } |
141 | ||
142 | /*-------------------------------------------------------------------------*/ | |
143 | ||
03a8f438 RQ |
144 | /** |
145 | * Map 'enum usbhs_omap_port_mode' found in <linux/platform_data/usb-omap.h> | |
146 | * to the device tree binding portN-mode found in | |
147 | * 'Documentation/devicetree/bindings/mfd/omap-usb-host.txt' | |
148 | */ | |
149 | static const char * const port_modes[] = { | |
150 | [OMAP_USBHS_PORT_MODE_UNUSED] = "", | |
151 | [OMAP_EHCI_PORT_MODE_PHY] = "ehci-phy", | |
152 | [OMAP_EHCI_PORT_MODE_TLL] = "ehci-tll", | |
153 | [OMAP_EHCI_PORT_MODE_HSIC] = "ehci-hsic", | |
154 | [OMAP_OHCI_PORT_MODE_PHY_6PIN_DATSE0] = "ohci-phy-6pin-datse0", | |
155 | [OMAP_OHCI_PORT_MODE_PHY_6PIN_DPDM] = "ohci-phy-6pin-dpdm", | |
156 | [OMAP_OHCI_PORT_MODE_PHY_3PIN_DATSE0] = "ohci-phy-3pin-datse0", | |
157 | [OMAP_OHCI_PORT_MODE_PHY_4PIN_DPDM] = "ohci-phy-4pin-dpdm", | |
158 | [OMAP_OHCI_PORT_MODE_TLL_6PIN_DATSE0] = "ohci-tll-6pin-datse0", | |
159 | [OMAP_OHCI_PORT_MODE_TLL_6PIN_DPDM] = "ohci-tll-6pin-dpdm", | |
160 | [OMAP_OHCI_PORT_MODE_TLL_3PIN_DATSE0] = "ohci-tll-3pin-datse0", | |
161 | [OMAP_OHCI_PORT_MODE_TLL_4PIN_DPDM] = "ohci-tll-4pin-dpdm", | |
162 | [OMAP_OHCI_PORT_MODE_TLL_2PIN_DATSE0] = "ohci-tll-2pin-datse0", | |
163 | [OMAP_OHCI_PORT_MODE_TLL_2PIN_DPDM] = "ohci-tll-2pin-dpdm", | |
164 | }; | |
165 | ||
166 | /** | |
167 | * omap_usbhs_get_dt_port_mode - Get the 'enum usbhs_omap_port_mode' | |
168 | * from the port mode string. | |
169 | * @mode: The port mode string, usually obtained from device tree. | |
170 | * | |
171 | * The function returns the 'enum usbhs_omap_port_mode' that matches the | |
172 | * provided port mode string as per the port_modes table. | |
173 | * If no match is found it returns -ENODEV | |
174 | */ | |
175 | static const int omap_usbhs_get_dt_port_mode(const char *mode) | |
176 | { | |
177 | int i; | |
178 | ||
179 | for (i = 0; i < ARRAY_SIZE(port_modes); i++) { | |
180 | if (!strcmp(mode, port_modes[i])) | |
181 | return i; | |
182 | } | |
183 | ||
184 | return -ENODEV; | |
185 | } | |
186 | ||
17cdd29d KM |
187 | static struct platform_device *omap_usbhs_alloc_child(const char *name, |
188 | struct resource *res, int num_resources, void *pdata, | |
189 | size_t pdata_size, struct device *dev) | |
190 | { | |
191 | struct platform_device *child; | |
192 | int ret; | |
193 | ||
194 | child = platform_device_alloc(name, 0); | |
195 | ||
196 | if (!child) { | |
197 | dev_err(dev, "platform_device_alloc %s failed\n", name); | |
198 | goto err_end; | |
199 | } | |
200 | ||
201 | ret = platform_device_add_resources(child, res, num_resources); | |
202 | if (ret) { | |
203 | dev_err(dev, "platform_device_add_resources failed\n"); | |
204 | goto err_alloc; | |
205 | } | |
206 | ||
207 | ret = platform_device_add_data(child, pdata, pdata_size); | |
208 | if (ret) { | |
209 | dev_err(dev, "platform_device_add_data failed\n"); | |
210 | goto err_alloc; | |
211 | } | |
212 | ||
213 | child->dev.dma_mask = &usbhs_dmamask; | |
cbb8c220 | 214 | dma_set_coherent_mask(&child->dev, DMA_BIT_MASK(32)); |
17cdd29d KM |
215 | child->dev.parent = dev; |
216 | ||
217 | ret = platform_device_add(child); | |
218 | if (ret) { | |
219 | dev_err(dev, "platform_device_add failed\n"); | |
220 | goto err_alloc; | |
221 | } | |
222 | ||
223 | return child; | |
224 | ||
225 | err_alloc: | |
226 | platform_device_put(child); | |
227 | ||
228 | err_end: | |
229 | return NULL; | |
230 | } | |
231 | ||
232 | static int omap_usbhs_alloc_children(struct platform_device *pdev) | |
233 | { | |
234 | struct device *dev = &pdev->dev; | |
334a41ce | 235 | struct usbhs_omap_platform_data *pdata = dev_get_platdata(dev); |
17cdd29d KM |
236 | struct platform_device *ehci; |
237 | struct platform_device *ohci; | |
238 | struct resource *res; | |
239 | struct resource resources[2]; | |
240 | int ret; | |
241 | ||
17cdd29d KM |
242 | res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "ehci"); |
243 | if (!res) { | |
244 | dev_err(dev, "EHCI get resource IORESOURCE_MEM failed\n"); | |
245 | ret = -ENODEV; | |
246 | goto err_end; | |
247 | } | |
248 | resources[0] = *res; | |
249 | ||
250 | res = platform_get_resource_byname(pdev, IORESOURCE_IRQ, "ehci-irq"); | |
251 | if (!res) { | |
252 | dev_err(dev, " EHCI get resource IORESOURCE_IRQ failed\n"); | |
253 | ret = -ENODEV; | |
254 | goto err_end; | |
255 | } | |
256 | resources[1] = *res; | |
257 | ||
9d9c6ae7 RQ |
258 | ehci = omap_usbhs_alloc_child(OMAP_EHCI_DEVICE, resources, 2, pdata, |
259 | sizeof(*pdata), dev); | |
17cdd29d KM |
260 | |
261 | if (!ehci) { | |
262 | dev_err(dev, "omap_usbhs_alloc_child failed\n"); | |
d910774f | 263 | ret = -ENOMEM; |
17cdd29d KM |
264 | goto err_end; |
265 | } | |
266 | ||
267 | res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "ohci"); | |
268 | if (!res) { | |
269 | dev_err(dev, "OHCI get resource IORESOURCE_MEM failed\n"); | |
270 | ret = -ENODEV; | |
271 | goto err_ehci; | |
272 | } | |
273 | resources[0] = *res; | |
274 | ||
275 | res = platform_get_resource_byname(pdev, IORESOURCE_IRQ, "ohci-irq"); | |
276 | if (!res) { | |
277 | dev_err(dev, "OHCI get resource IORESOURCE_IRQ failed\n"); | |
278 | ret = -ENODEV; | |
279 | goto err_ehci; | |
280 | } | |
281 | resources[1] = *res; | |
282 | ||
9d9c6ae7 RQ |
283 | ohci = omap_usbhs_alloc_child(OMAP_OHCI_DEVICE, resources, 2, pdata, |
284 | sizeof(*pdata), dev); | |
17cdd29d KM |
285 | if (!ohci) { |
286 | dev_err(dev, "omap_usbhs_alloc_child failed\n"); | |
d910774f | 287 | ret = -ENOMEM; |
17cdd29d KM |
288 | goto err_ehci; |
289 | } | |
290 | ||
291 | return 0; | |
292 | ||
293 | err_ehci: | |
d910774f | 294 | platform_device_unregister(ehci); |
17cdd29d KM |
295 | |
296 | err_end: | |
297 | return ret; | |
298 | } | |
299 | ||
17cdd29d KM |
300 | static bool is_ohci_port(enum usbhs_omap_port_mode pmode) |
301 | { | |
302 | switch (pmode) { | |
303 | case OMAP_OHCI_PORT_MODE_PHY_6PIN_DATSE0: | |
304 | case OMAP_OHCI_PORT_MODE_PHY_6PIN_DPDM: | |
305 | case OMAP_OHCI_PORT_MODE_PHY_3PIN_DATSE0: | |
306 | case OMAP_OHCI_PORT_MODE_PHY_4PIN_DPDM: | |
307 | case OMAP_OHCI_PORT_MODE_TLL_6PIN_DATSE0: | |
308 | case OMAP_OHCI_PORT_MODE_TLL_6PIN_DPDM: | |
309 | case OMAP_OHCI_PORT_MODE_TLL_3PIN_DATSE0: | |
310 | case OMAP_OHCI_PORT_MODE_TLL_4PIN_DPDM: | |
311 | case OMAP_OHCI_PORT_MODE_TLL_2PIN_DATSE0: | |
312 | case OMAP_OHCI_PORT_MODE_TLL_2PIN_DPDM: | |
313 | return true; | |
314 | ||
315 | default: | |
316 | return false; | |
317 | } | |
318 | } | |
319 | ||
1e7fe1a9 | 320 | static int usbhs_runtime_resume(struct device *dev) |
17cdd29d KM |
321 | { |
322 | struct usbhs_hcd_omap *omap = dev_get_drvdata(dev); | |
9d9c6ae7 | 323 | struct usbhs_omap_platform_data *pdata = omap->pdata; |
06ba7dc7 | 324 | int i, r; |
1e7fe1a9 KM |
325 | |
326 | dev_dbg(dev, "usbhs_runtime_resume\n"); | |
17cdd29d | 327 | |
9f4a3ece | 328 | omap_tll_enable(pdata); |
17cdd29d | 329 | |
06ba7dc7 | 330 | if (!IS_ERR(omap->ehci_logic_fck)) |
b0e59926 | 331 | clk_prepare_enable(omap->ehci_logic_fck); |
1e7fe1a9 | 332 | |
06ba7dc7 | 333 | for (i = 0; i < omap->nports; i++) { |
340c64ea RQ |
334 | switch (pdata->port_mode[i]) { |
335 | case OMAP_EHCI_PORT_MODE_HSIC: | |
336 | if (!IS_ERR(omap->hsic60m_clk[i])) { | |
b0e59926 | 337 | r = clk_prepare_enable(omap->hsic60m_clk[i]); |
340c64ea RQ |
338 | if (r) { |
339 | dev_err(dev, | |
340 | "Can't enable port %d hsic60m clk:%d\n", | |
341 | i, r); | |
342 | } | |
343 | } | |
344 | ||
345 | if (!IS_ERR(omap->hsic480m_clk[i])) { | |
b0e59926 | 346 | r = clk_prepare_enable(omap->hsic480m_clk[i]); |
340c64ea RQ |
347 | if (r) { |
348 | dev_err(dev, | |
349 | "Can't enable port %d hsic480m clk:%d\n", | |
350 | i, r); | |
351 | } | |
352 | } | |
353 | /* Fall through as HSIC mode needs utmi_clk */ | |
354 | ||
355 | case OMAP_EHCI_PORT_MODE_TLL: | |
356 | if (!IS_ERR(omap->utmi_clk[i])) { | |
b0e59926 | 357 | r = clk_prepare_enable(omap->utmi_clk[i]); |
340c64ea RQ |
358 | if (r) { |
359 | dev_err(dev, | |
360 | "Can't enable port %d clk : %d\n", | |
361 | i, r); | |
362 | } | |
363 | } | |
364 | break; | |
365 | default: | |
366 | break; | |
367 | } | |
06ba7dc7 | 368 | } |
1e7fe1a9 | 369 | |
1e7fe1a9 KM |
370 | return 0; |
371 | } | |
372 | ||
373 | static int usbhs_runtime_suspend(struct device *dev) | |
374 | { | |
375 | struct usbhs_hcd_omap *omap = dev_get_drvdata(dev); | |
9d9c6ae7 | 376 | struct usbhs_omap_platform_data *pdata = omap->pdata; |
06ba7dc7 | 377 | int i; |
1e7fe1a9 KM |
378 | |
379 | dev_dbg(dev, "usbhs_runtime_suspend\n"); | |
380 | ||
06ba7dc7 | 381 | for (i = 0; i < omap->nports; i++) { |
340c64ea RQ |
382 | switch (pdata->port_mode[i]) { |
383 | case OMAP_EHCI_PORT_MODE_HSIC: | |
384 | if (!IS_ERR(omap->hsic60m_clk[i])) | |
b0e59926 | 385 | clk_disable_unprepare(omap->hsic60m_clk[i]); |
340c64ea RQ |
386 | |
387 | if (!IS_ERR(omap->hsic480m_clk[i])) | |
b0e59926 | 388 | clk_disable_unprepare(omap->hsic480m_clk[i]); |
340c64ea RQ |
389 | /* Fall through as utmi_clks were used in HSIC mode */ |
390 | ||
391 | case OMAP_EHCI_PORT_MODE_TLL: | |
392 | if (!IS_ERR(omap->utmi_clk[i])) | |
b0e59926 | 393 | clk_disable_unprepare(omap->utmi_clk[i]); |
340c64ea RQ |
394 | break; |
395 | default: | |
396 | break; | |
397 | } | |
06ba7dc7 | 398 | } |
1e7fe1a9 | 399 | |
06ba7dc7 | 400 | if (!IS_ERR(omap->ehci_logic_fck)) |
b0e59926 | 401 | clk_disable_unprepare(omap->ehci_logic_fck); |
1e7fe1a9 | 402 | |
9f4a3ece | 403 | omap_tll_disable(pdata); |
1e7fe1a9 KM |
404 | |
405 | return 0; | |
406 | } | |
407 | ||
c4df00ae RQ |
408 | static unsigned omap_usbhs_rev1_hostconfig(struct usbhs_hcd_omap *omap, |
409 | unsigned reg) | |
410 | { | |
411 | struct usbhs_omap_platform_data *pdata = omap->pdata; | |
412 | int i; | |
413 | ||
414 | for (i = 0; i < omap->nports; i++) { | |
415 | switch (pdata->port_mode[i]) { | |
416 | case OMAP_USBHS_PORT_MODE_UNUSED: | |
417 | reg &= ~(OMAP_UHH_HOSTCONFIG_P1_CONNECT_STATUS << i); | |
418 | break; | |
419 | case OMAP_EHCI_PORT_MODE_PHY: | |
420 | if (pdata->single_ulpi_bypass) | |
421 | break; | |
422 | ||
423 | if (i == 0) | |
424 | reg &= ~OMAP_UHH_HOSTCONFIG_ULPI_P1_BYPASS; | |
425 | else | |
426 | reg &= ~(OMAP_UHH_HOSTCONFIG_ULPI_P2_BYPASS | |
427 | << (i-1)); | |
428 | break; | |
429 | default: | |
430 | if (pdata->single_ulpi_bypass) | |
431 | break; | |
432 | ||
433 | if (i == 0) | |
434 | reg |= OMAP_UHH_HOSTCONFIG_ULPI_P1_BYPASS; | |
435 | else | |
436 | reg |= OMAP_UHH_HOSTCONFIG_ULPI_P2_BYPASS | |
437 | << (i-1); | |
438 | break; | |
439 | } | |
440 | } | |
441 | ||
442 | if (pdata->single_ulpi_bypass) { | |
443 | /* bypass ULPI only if none of the ports use PHY mode */ | |
444 | reg |= OMAP_UHH_HOSTCONFIG_ULPI_BYPASS; | |
445 | ||
446 | for (i = 0; i < omap->nports; i++) { | |
447 | if (is_ehci_phy_mode(pdata->port_mode[i])) { | |
448 | reg &= OMAP_UHH_HOSTCONFIG_ULPI_BYPASS; | |
449 | break; | |
450 | } | |
451 | } | |
452 | } | |
453 | ||
454 | return reg; | |
455 | } | |
456 | ||
457 | static unsigned omap_usbhs_rev2_hostconfig(struct usbhs_hcd_omap *omap, | |
458 | unsigned reg) | |
459 | { | |
460 | struct usbhs_omap_platform_data *pdata = omap->pdata; | |
461 | int i; | |
462 | ||
463 | for (i = 0; i < omap->nports; i++) { | |
464 | /* Clear port mode fields for PHY mode */ | |
465 | reg &= ~(OMAP4_P1_MODE_CLEAR << 2 * i); | |
466 | ||
467 | if (is_ehci_tll_mode(pdata->port_mode[i]) || | |
468 | (is_ohci_port(pdata->port_mode[i]))) | |
469 | reg |= OMAP4_P1_MODE_TLL << 2 * i; | |
470 | else if (is_ehci_hsic_mode(pdata->port_mode[i])) | |
471 | reg |= OMAP4_P1_MODE_HSIC << 2 * i; | |
472 | } | |
473 | ||
474 | return reg; | |
475 | } | |
476 | ||
1e7fe1a9 KM |
477 | static void omap_usbhs_init(struct device *dev) |
478 | { | |
479 | struct usbhs_hcd_omap *omap = dev_get_drvdata(dev); | |
1e7fe1a9 KM |
480 | unsigned reg; |
481 | ||
482 | dev_dbg(dev, "starting TI HSUSB Controller\n"); | |
483 | ||
760189b3 | 484 | pm_runtime_get_sync(dev); |
17cdd29d | 485 | |
17cdd29d KM |
486 | reg = usbhs_read(omap->uhh_base, OMAP_UHH_HOSTCONFIG); |
487 | /* setup ULPI bypass and burst configurations */ | |
488 | reg |= (OMAP_UHH_HOSTCONFIG_INCR4_BURST_EN | |
489 | | OMAP_UHH_HOSTCONFIG_INCR8_BURST_EN | |
490 | | OMAP_UHH_HOSTCONFIG_INCR16_BURST_EN); | |
491 | reg |= OMAP4_UHH_HOSTCONFIG_APP_START_CLK; | |
492 | reg &= ~OMAP_UHH_HOSTCONFIG_INCRX_ALIGN_EN; | |
493 | ||
c4df00ae RQ |
494 | switch (omap->usbhs_rev) { |
495 | case OMAP_USBHS_REV1: | |
26bacba1 | 496 | reg = omap_usbhs_rev1_hostconfig(omap, reg); |
c4df00ae RQ |
497 | break; |
498 | ||
499 | case OMAP_USBHS_REV2: | |
26bacba1 | 500 | reg = omap_usbhs_rev2_hostconfig(omap, reg); |
c4df00ae RQ |
501 | break; |
502 | ||
503 | default: /* newer revisions */ | |
26bacba1 | 504 | reg = omap_usbhs_rev2_hostconfig(omap, reg); |
c4df00ae | 505 | break; |
17cdd29d KM |
506 | } |
507 | ||
508 | usbhs_write(omap->uhh_base, OMAP_UHH_HOSTCONFIG, reg); | |
509 | dev_dbg(dev, "UHH setup done, uhh_hostconfig=%x\n", reg); | |
510 | ||
760189b3 | 511 | pm_runtime_put_sync(dev); |
1e7fe1a9 KM |
512 | } |
513 | ||
03a8f438 RQ |
514 | static int usbhs_omap_get_dt_pdata(struct device *dev, |
515 | struct usbhs_omap_platform_data *pdata) | |
516 | { | |
517 | int ret, i; | |
518 | struct device_node *node = dev->of_node; | |
519 | ||
520 | ret = of_property_read_u32(node, "num-ports", &pdata->nports); | |
521 | if (ret) | |
522 | pdata->nports = 0; | |
523 | ||
524 | if (pdata->nports > OMAP3_HS_USB_PORTS) { | |
525 | dev_warn(dev, "Too many num_ports <%d> in device tree. Max %d\n", | |
526 | pdata->nports, OMAP3_HS_USB_PORTS); | |
527 | return -ENODEV; | |
528 | } | |
529 | ||
530 | /* get port modes */ | |
531 | for (i = 0; i < OMAP3_HS_USB_PORTS; i++) { | |
532 | char prop[11]; | |
533 | const char *mode; | |
534 | ||
535 | pdata->port_mode[i] = OMAP_USBHS_PORT_MODE_UNUSED; | |
536 | ||
537 | snprintf(prop, sizeof(prop), "port%d-mode", i + 1); | |
538 | ret = of_property_read_string(node, prop, &mode); | |
539 | if (ret < 0) | |
540 | continue; | |
541 | ||
542 | ret = omap_usbhs_get_dt_port_mode(mode); | |
543 | if (ret < 0) { | |
544 | dev_warn(dev, "Invalid port%d-mode \"%s\" in device tree\n", | |
545 | i, mode); | |
546 | return -ENODEV; | |
547 | } | |
548 | ||
549 | dev_dbg(dev, "port%d-mode: %s -> %d\n", i, mode, ret); | |
550 | pdata->port_mode[i] = ret; | |
551 | } | |
552 | ||
553 | /* get flags */ | |
554 | pdata->single_ulpi_bypass = of_property_read_bool(node, | |
555 | "single-ulpi-bypass"); | |
556 | ||
557 | return 0; | |
558 | } | |
559 | ||
560 | static struct of_device_id usbhs_child_match_table[] = { | |
561 | { .compatible = "ti,omap-ehci", }, | |
562 | { .compatible = "ti,omap-ohci", }, | |
563 | { } | |
564 | }; | |
565 | ||
1e7fe1a9 KM |
566 | /** |
567 | * usbhs_omap_probe - initialize TI-based HCDs | |
568 | * | |
569 | * Allocates basic resources for this USB host controller. | |
570 | */ | |
f791be49 | 571 | static int usbhs_omap_probe(struct platform_device *pdev) |
17cdd29d | 572 | { |
1e7fe1a9 | 573 | struct device *dev = &pdev->dev; |
334a41ce | 574 | struct usbhs_omap_platform_data *pdata = dev_get_platdata(dev); |
1e7fe1a9 KM |
575 | struct usbhs_hcd_omap *omap; |
576 | struct resource *res; | |
577 | int ret = 0; | |
578 | int i; | |
06ba7dc7 | 579 | bool need_logic_fck; |
17cdd29d | 580 | |
03a8f438 RQ |
581 | if (dev->of_node) { |
582 | /* For DT boot we populate platform data from OF node */ | |
583 | pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL); | |
584 | if (!pdata) | |
585 | return -ENOMEM; | |
586 | ||
587 | ret = usbhs_omap_get_dt_pdata(dev, pdata); | |
588 | if (ret) | |
589 | return ret; | |
590 | ||
591 | dev->platform_data = pdata; | |
592 | } | |
593 | ||
1e7fe1a9 KM |
594 | if (!pdata) { |
595 | dev_err(dev, "Missing platform data\n"); | |
27d4f2c6 | 596 | return -ENODEV; |
1e7fe1a9 | 597 | } |
17cdd29d | 598 | |
03a8f438 RQ |
599 | if (pdata->nports > OMAP3_HS_USB_PORTS) { |
600 | dev_info(dev, "Too many num_ports <%d> in platform_data. Max %d\n", | |
601 | pdata->nports, OMAP3_HS_USB_PORTS); | |
602 | return -ENODEV; | |
603 | } | |
604 | ||
27d4f2c6 | 605 | omap = devm_kzalloc(dev, sizeof(*omap), GFP_KERNEL); |
1e7fe1a9 KM |
606 | if (!omap) { |
607 | dev_err(dev, "Memory allocation failed\n"); | |
27d4f2c6 RQ |
608 | return -ENOMEM; |
609 | } | |
610 | ||
03a8f438 | 611 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
d011c450 SK |
612 | omap->uhh_base = devm_ioremap_resource(dev, res); |
613 | if (IS_ERR(omap->uhh_base)) | |
614 | return PTR_ERR(omap->uhh_base); | |
17cdd29d | 615 | |
9d9c6ae7 | 616 | omap->pdata = pdata; |
17cdd29d | 617 | |
9f4a3ece RQ |
618 | /* Initialize the TLL subsystem */ |
619 | omap_tll_init(pdata); | |
620 | ||
1e7fe1a9 | 621 | pm_runtime_enable(dev); |
17cdd29d | 622 | |
d7eaf866 RQ |
623 | platform_set_drvdata(pdev, omap); |
624 | pm_runtime_get_sync(dev); | |
625 | ||
626 | omap->usbhs_rev = usbhs_read(omap->uhh_base, OMAP_UHH_REVISION); | |
627 | ||
628 | /* we need to call runtime suspend before we update omap->nports | |
629 | * to prevent unbalanced clk_disable() | |
630 | */ | |
631 | pm_runtime_put_sync(dev); | |
632 | ||
ccac71a7 RQ |
633 | /* |
634 | * If platform data contains nports then use that | |
635 | * else make out number of ports from USBHS revision | |
636 | */ | |
637 | if (pdata->nports) { | |
638 | omap->nports = pdata->nports; | |
639 | } else { | |
640 | switch (omap->usbhs_rev) { | |
641 | case OMAP_USBHS_REV1: | |
642 | omap->nports = 3; | |
643 | break; | |
644 | case OMAP_USBHS_REV2: | |
645 | omap->nports = 2; | |
646 | break; | |
647 | default: | |
648 | omap->nports = OMAP3_HS_USB_PORTS; | |
649 | dev_dbg(dev, | |
650 | "USB HOST Rev:0x%d not recognized, assuming %d ports\n", | |
651 | omap->usbhs_rev, omap->nports); | |
652 | break; | |
653 | } | |
662e469e | 654 | pdata->nports = omap->nports; |
d7eaf866 RQ |
655 | } |
656 | ||
06ba7dc7 RQ |
657 | i = sizeof(struct clk *) * omap->nports; |
658 | omap->utmi_clk = devm_kzalloc(dev, i, GFP_KERNEL); | |
340c64ea RQ |
659 | omap->hsic480m_clk = devm_kzalloc(dev, i, GFP_KERNEL); |
660 | omap->hsic60m_clk = devm_kzalloc(dev, i, GFP_KERNEL); | |
661 | ||
662 | if (!omap->utmi_clk || !omap->hsic480m_clk || !omap->hsic60m_clk) { | |
06ba7dc7 RQ |
663 | dev_err(dev, "Memory allocation failed\n"); |
664 | ret = -ENOMEM; | |
665 | goto err_mem; | |
666 | } | |
667 | ||
3aca446a RQ |
668 | /* Set all clocks as invalid to begin with */ |
669 | omap->ehci_logic_fck = ERR_PTR(-ENODEV); | |
670 | omap->init_60m_fclk = ERR_PTR(-ENODEV); | |
671 | omap->utmi_p1_gfclk = ERR_PTR(-ENODEV); | |
672 | omap->utmi_p2_gfclk = ERR_PTR(-ENODEV); | |
673 | omap->xclk60mhsp1_ck = ERR_PTR(-ENODEV); | |
674 | omap->xclk60mhsp2_ck = ERR_PTR(-ENODEV); | |
675 | ||
06ba7dc7 | 676 | for (i = 0; i < omap->nports; i++) { |
3aca446a RQ |
677 | omap->utmi_clk[i] = ERR_PTR(-ENODEV); |
678 | omap->hsic480m_clk[i] = ERR_PTR(-ENODEV); | |
679 | omap->hsic60m_clk[i] = ERR_PTR(-ENODEV); | |
06ba7dc7 RQ |
680 | } |
681 | ||
3aca446a RQ |
682 | /* for OMAP3 i.e. USBHS REV1 */ |
683 | if (omap->usbhs_rev == OMAP_USBHS_REV1) { | |
684 | need_logic_fck = false; | |
685 | for (i = 0; i < omap->nports; i++) { | |
686 | if (is_ehci_phy_mode(pdata->port_mode[i]) || | |
687 | is_ehci_tll_mode(pdata->port_mode[i]) || | |
688 | is_ehci_hsic_mode(pdata->port_mode[i])) | |
689 | ||
690 | need_logic_fck |= true; | |
691 | } | |
692 | ||
693 | if (need_logic_fck) { | |
694 | omap->ehci_logic_fck = devm_clk_get(dev, | |
695 | "ehci_logic_fck"); | |
696 | if (IS_ERR(omap->ehci_logic_fck)) { | |
697 | ret = PTR_ERR(omap->ehci_logic_fck); | |
698 | dev_dbg(dev, "ehci_logic_fck failed:%d\n", ret); | |
699 | } | |
1e7fe1a9 | 700 | } |
3aca446a | 701 | goto initialize; |
06ba7dc7 | 702 | } |
17cdd29d | 703 | |
3aca446a | 704 | /* for OMAP4+ i.e. USBHS REV2+ */ |
61b7025f | 705 | omap->utmi_p1_gfclk = devm_clk_get(dev, "utmi_p1_gfclk"); |
06ba7dc7 RQ |
706 | if (IS_ERR(omap->utmi_p1_gfclk)) { |
707 | ret = PTR_ERR(omap->utmi_p1_gfclk); | |
708 | dev_err(dev, "utmi_p1_gfclk failed error:%d\n", ret); | |
61b7025f | 709 | goto err_mem; |
06ba7dc7 RQ |
710 | } |
711 | ||
61b7025f | 712 | omap->utmi_p2_gfclk = devm_clk_get(dev, "utmi_p2_gfclk"); |
06ba7dc7 RQ |
713 | if (IS_ERR(omap->utmi_p2_gfclk)) { |
714 | ret = PTR_ERR(omap->utmi_p2_gfclk); | |
715 | dev_err(dev, "utmi_p2_gfclk failed error:%d\n", ret); | |
61b7025f | 716 | goto err_mem; |
17cdd29d KM |
717 | } |
718 | ||
61b7025f | 719 | omap->xclk60mhsp1_ck = devm_clk_get(dev, "xclk60mhsp1_ck"); |
1e7fe1a9 KM |
720 | if (IS_ERR(omap->xclk60mhsp1_ck)) { |
721 | ret = PTR_ERR(omap->xclk60mhsp1_ck); | |
722 | dev_err(dev, "xclk60mhsp1_ck failed error:%d\n", ret); | |
61b7025f | 723 | goto err_mem; |
17cdd29d KM |
724 | } |
725 | ||
61b7025f | 726 | omap->xclk60mhsp2_ck = devm_clk_get(dev, "xclk60mhsp2_ck"); |
1e7fe1a9 KM |
727 | if (IS_ERR(omap->xclk60mhsp2_ck)) { |
728 | ret = PTR_ERR(omap->xclk60mhsp2_ck); | |
729 | dev_err(dev, "xclk60mhsp2_ck failed error:%d\n", ret); | |
61b7025f | 730 | goto err_mem; |
17cdd29d KM |
731 | } |
732 | ||
61b7025f | 733 | omap->init_60m_fclk = devm_clk_get(dev, "init_60m_fclk"); |
1e7fe1a9 KM |
734 | if (IS_ERR(omap->init_60m_fclk)) { |
735 | ret = PTR_ERR(omap->init_60m_fclk); | |
736 | dev_err(dev, "init_60m_fclk failed error:%d\n", ret); | |
61b7025f | 737 | goto err_mem; |
06ba7dc7 RQ |
738 | } |
739 | ||
740 | for (i = 0; i < omap->nports; i++) { | |
340c64ea | 741 | char clkname[30]; |
06ba7dc7 RQ |
742 | |
743 | /* clock names are indexed from 1*/ | |
744 | snprintf(clkname, sizeof(clkname), | |
745 | "usb_host_hs_utmi_p%d_clk", i + 1); | |
746 | ||
747 | /* If a clock is not found we won't bail out as not all | |
748 | * platforms have all clocks and we can function without | |
749 | * them | |
750 | */ | |
61b7025f | 751 | omap->utmi_clk[i] = devm_clk_get(dev, clkname); |
06ba7dc7 RQ |
752 | if (IS_ERR(omap->utmi_clk[i])) |
753 | dev_dbg(dev, "Failed to get clock : %s : %ld\n", | |
754 | clkname, PTR_ERR(omap->utmi_clk[i])); | |
340c64ea RQ |
755 | |
756 | snprintf(clkname, sizeof(clkname), | |
757 | "usb_host_hs_hsic480m_p%d_clk", i + 1); | |
61b7025f | 758 | omap->hsic480m_clk[i] = devm_clk_get(dev, clkname); |
340c64ea RQ |
759 | if (IS_ERR(omap->hsic480m_clk[i])) |
760 | dev_dbg(dev, "Failed to get clock : %s : %ld\n", | |
761 | clkname, PTR_ERR(omap->hsic480m_clk[i])); | |
762 | ||
763 | snprintf(clkname, sizeof(clkname), | |
764 | "usb_host_hs_hsic60m_p%d_clk", i + 1); | |
61b7025f | 765 | omap->hsic60m_clk[i] = devm_clk_get(dev, clkname); |
340c64ea RQ |
766 | if (IS_ERR(omap->hsic60m_clk[i])) |
767 | dev_dbg(dev, "Failed to get clock : %s : %ld\n", | |
768 | clkname, PTR_ERR(omap->hsic60m_clk[i])); | |
17cdd29d KM |
769 | } |
770 | ||
1e7fe1a9 | 771 | if (is_ehci_phy_mode(pdata->port_mode[0])) { |
06ba7dc7 | 772 | ret = clk_set_parent(omap->utmi_p1_gfclk, |
1e7fe1a9 KM |
773 | omap->xclk60mhsp1_ck); |
774 | if (ret != 0) | |
a8c4e9e1 RQ |
775 | dev_dbg(dev, "xclk60mhsp1_ck set parent failed: %d\n", |
776 | ret); | |
1e7fe1a9 | 777 | } else if (is_ehci_tll_mode(pdata->port_mode[0])) { |
06ba7dc7 | 778 | ret = clk_set_parent(omap->utmi_p1_gfclk, |
1e7fe1a9 KM |
779 | omap->init_60m_fclk); |
780 | if (ret != 0) | |
a8c4e9e1 RQ |
781 | dev_dbg(dev, "P0 init_60m_fclk set parent failed: %d\n", |
782 | ret); | |
1e7fe1a9 | 783 | } |
17cdd29d | 784 | |
1e7fe1a9 | 785 | if (is_ehci_phy_mode(pdata->port_mode[1])) { |
06ba7dc7 | 786 | ret = clk_set_parent(omap->utmi_p2_gfclk, |
1e7fe1a9 KM |
787 | omap->xclk60mhsp2_ck); |
788 | if (ret != 0) | |
a8c4e9e1 RQ |
789 | dev_dbg(dev, "xclk60mhsp2_ck set parent failed: %d\n", |
790 | ret); | |
1e7fe1a9 | 791 | } else if (is_ehci_tll_mode(pdata->port_mode[1])) { |
06ba7dc7 | 792 | ret = clk_set_parent(omap->utmi_p2_gfclk, |
1e7fe1a9 KM |
793 | omap->init_60m_fclk); |
794 | if (ret != 0) | |
a8c4e9e1 RQ |
795 | dev_dbg(dev, "P1 init_60m_fclk set parent failed: %d\n", |
796 | ret); | |
1e7fe1a9 | 797 | } |
6eb6fbbf | 798 | |
3aca446a | 799 | initialize: |
f0447a69 | 800 | omap_usbhs_init(dev); |
03a8f438 RQ |
801 | |
802 | if (dev->of_node) { | |
803 | ret = of_platform_populate(dev->of_node, | |
804 | usbhs_child_match_table, NULL, dev); | |
805 | ||
806 | if (ret) { | |
807 | dev_err(dev, "Failed to create DT children: %d\n", ret); | |
61b7025f | 808 | goto err_mem; |
03a8f438 RQ |
809 | } |
810 | ||
811 | } else { | |
812 | ret = omap_usbhs_alloc_children(pdev); | |
813 | if (ret) { | |
814 | dev_err(dev, "omap_usbhs_alloc_children failed: %d\n", | |
815 | ret); | |
61b7025f | 816 | goto err_mem; |
03a8f438 | 817 | } |
1e7fe1a9 KM |
818 | } |
819 | ||
27d4f2c6 | 820 | return 0; |
1e7fe1a9 | 821 | |
06ba7dc7 | 822 | err_mem: |
1e7fe1a9 | 823 | pm_runtime_disable(dev); |
1e7fe1a9 | 824 | |
1e7fe1a9 | 825 | return ret; |
17cdd29d | 826 | } |
17cdd29d | 827 | |
03a8f438 RQ |
828 | static int usbhs_omap_remove_child(struct device *dev, void *data) |
829 | { | |
830 | dev_info(dev, "unregistering\n"); | |
831 | platform_device_unregister(to_platform_device(dev)); | |
832 | return 0; | |
833 | } | |
834 | ||
1e7fe1a9 KM |
835 | /** |
836 | * usbhs_omap_remove - shutdown processing for UHH & TLL HCDs | |
837 | * @pdev: USB Host Controller being removed | |
838 | * | |
839 | * Reverses the effect of usbhs_omap_probe(). | |
840 | */ | |
4740f73f | 841 | static int usbhs_omap_remove(struct platform_device *pdev) |
17cdd29d | 842 | { |
1e7fe1a9 | 843 | pm_runtime_disable(&pdev->dev); |
1e7fe1a9 | 844 | |
03a8f438 RQ |
845 | /* remove children */ |
846 | device_for_each_child(&pdev->dev, NULL, usbhs_omap_remove_child); | |
1e7fe1a9 | 847 | return 0; |
17cdd29d | 848 | } |
1e7fe1a9 KM |
849 | |
850 | static const struct dev_pm_ops usbhsomap_dev_pm_ops = { | |
851 | .runtime_suspend = usbhs_runtime_suspend, | |
852 | .runtime_resume = usbhs_runtime_resume, | |
853 | }; | |
17cdd29d | 854 | |
03a8f438 RQ |
855 | static const struct of_device_id usbhs_omap_dt_ids[] = { |
856 | { .compatible = "ti,usbhs-host" }, | |
857 | { } | |
858 | }; | |
859 | ||
860 | MODULE_DEVICE_TABLE(of, usbhs_omap_dt_ids); | |
861 | ||
862 | ||
17cdd29d KM |
863 | static struct platform_driver usbhs_omap_driver = { |
864 | .driver = { | |
865 | .name = (char *)usbhs_driver_name, | |
866 | .owner = THIS_MODULE, | |
1e7fe1a9 | 867 | .pm = &usbhsomap_dev_pm_ops, |
0f54e1e1 | 868 | .of_match_table = usbhs_omap_dt_ids, |
17cdd29d | 869 | }, |
ab3f2a86 | 870 | .remove = usbhs_omap_remove, |
17cdd29d KM |
871 | }; |
872 | ||
873 | MODULE_AUTHOR("Keshava Munegowda <keshava_mgowda@ti.com>"); | |
03a8f438 | 874 | MODULE_AUTHOR("Roger Quadros <rogerq@ti.com>"); |
17cdd29d KM |
875 | MODULE_ALIAS("platform:" USBHS_DRIVER_NAME); |
876 | MODULE_LICENSE("GPL v2"); | |
877 | MODULE_DESCRIPTION("usb host common core driver for omap EHCI and OHCI"); | |
878 | ||
879 | static int __init omap_usbhs_drvinit(void) | |
880 | { | |
881 | return platform_driver_probe(&usbhs_omap_driver, usbhs_omap_probe); | |
882 | } | |
883 | ||
884 | /* | |
885 | * init before ehci and ohci drivers; | |
886 | * The usbhs core driver should be initialized much before | |
887 | * the omap ehci and ohci probe functions are called. | |
4dc2cceb KM |
888 | * This usbhs core driver should be initialized after |
889 | * usb tll driver | |
17cdd29d | 890 | */ |
4dc2cceb | 891 | fs_initcall_sync(omap_usbhs_drvinit); |
17cdd29d KM |
892 | |
893 | static void __exit omap_usbhs_drvexit(void) | |
894 | { | |
895 | platform_driver_unregister(&usbhs_omap_driver); | |
896 | } | |
897 | module_exit(omap_usbhs_drvexit); |