diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2013-02-21 15:20:00 -0500 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2013-02-21 15:20:00 -0500 |
commit | 74e1a2a39355b2d3ae8c60c78d8add162c6d7183 (patch) | |
tree | 1ce09f285c505a774838a95cff7327a750dc85fc /drivers/usb/phy/omap-usb3.c | |
parent | b5c78e04dd061b776978dad61dd85357081147b0 (diff) | |
parent | 6166805c3de539a41cfcae39026c5bc273d7c6aa (diff) |
Merge tag 'usb-3.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb
Pull USB patches from Greg Kroah-Hartman:
"Here's the big USB merge for 3.9-rc1
Nothing major, lots of gadget fixes, and of course, xhci stuff.
All of this has been in linux-next for a while, with the exception of
the last 3 patches, which were reverts of patches in the tree that
caused problems, they went in yesterday."
* tag 'usb-3.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: (190 commits)
Revert "USB: EHCI: make ehci-vt8500 a separate driver"
Revert "USB: EHCI: make ehci-orion a separate driver"
Revert "USB: update host controller Kconfig entries"
USB: update host controller Kconfig entries
USB: EHCI: make ehci-orion a separate driver
USB: EHCI: make ehci-vt8500 a separate driver
USB: usb-storage: unusual_devs update for Super TOP SATA bridge
USB: ehci-omap: Fix autoloading of module
USB: ehci-omap: Don't free gpios that we didn't request
USB: option: add Huawei "ACM" devices using protocol = vendor
USB: serial: fix null-pointer dereferences on disconnect
USB: option: add Yota / Megafon M100-1 4g modem
drivers/usb: add missing GENERIC_HARDIRQS dependencies
USB: storage: properly handle the endian issues of idProduct
testusb: remove all mentions of 'usbfs'
usb: gadget: imx_udc: make it depend on BROKEN
usb: omap_control_usb: fix compile warning
ARM: OMAP: USB: Add phy binding information
ARM: OMAP2: MUSB: Specify omap4 has mailbox
ARM: OMAP: devices: create device for usb part of control module
...
Diffstat (limited to 'drivers/usb/phy/omap-usb3.c')
-rw-r--r-- | drivers/usb/phy/omap-usb3.c | 355 |
1 files changed, 355 insertions, 0 deletions
diff --git a/drivers/usb/phy/omap-usb3.c b/drivers/usb/phy/omap-usb3.c new file mode 100644 index 000000000000..fadc0c2b65bb --- /dev/null +++ b/drivers/usb/phy/omap-usb3.c | |||
@@ -0,0 +1,355 @@ | |||
1 | /* | ||
2 | * omap-usb3 - USB PHY, talking to dwc3 controller in OMAP. | ||
3 | * | ||
4 | * Copyright (C) 2013 Texas Instruments Incorporated - http://www.ti.com | ||
5 | * This program is free software; you can redistribute it and/or modify | ||
6 | * it under the terms of the GNU General Public License as published by | ||
7 | * the Free Software Foundation; either version 2 of the License, or | ||
8 | * (at your option) any later version. | ||
9 | * | ||
10 | * Author: Kishon Vijay Abraham I <kishon@ti.com> | ||
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 | */ | ||
18 | |||
19 | #include <linux/module.h> | ||
20 | #include <linux/platform_device.h> | ||
21 | #include <linux/slab.h> | ||
22 | #include <linux/usb/omap_usb.h> | ||
23 | #include <linux/of.h> | ||
24 | #include <linux/clk.h> | ||
25 | #include <linux/err.h> | ||
26 | #include <linux/pm_runtime.h> | ||
27 | #include <linux/delay.h> | ||
28 | #include <linux/usb/omap_control_usb.h> | ||
29 | |||
30 | #define NUM_SYS_CLKS 5 | ||
31 | #define PLL_STATUS 0x00000004 | ||
32 | #define PLL_GO 0x00000008 | ||
33 | #define PLL_CONFIGURATION1 0x0000000C | ||
34 | #define PLL_CONFIGURATION2 0x00000010 | ||
35 | #define PLL_CONFIGURATION3 0x00000014 | ||
36 | #define PLL_CONFIGURATION4 0x00000020 | ||
37 | |||
38 | #define PLL_REGM_MASK 0x001FFE00 | ||
39 | #define PLL_REGM_SHIFT 0x9 | ||
40 | #define PLL_REGM_F_MASK 0x0003FFFF | ||
41 | #define PLL_REGM_F_SHIFT 0x0 | ||
42 | #define PLL_REGN_MASK 0x000001FE | ||
43 | #define PLL_REGN_SHIFT 0x1 | ||
44 | #define PLL_SELFREQDCO_MASK 0x0000000E | ||
45 | #define PLL_SELFREQDCO_SHIFT 0x1 | ||
46 | #define PLL_SD_MASK 0x0003FC00 | ||
47 | #define PLL_SD_SHIFT 0x9 | ||
48 | #define SET_PLL_GO 0x1 | ||
49 | #define PLL_TICOPWDN 0x10000 | ||
50 | #define PLL_LOCK 0x2 | ||
51 | #define PLL_IDLE 0x1 | ||
52 | |||
53 | /* | ||
54 | * This is an Empirical value that works, need to confirm the actual | ||
55 | * value required for the USB3PHY_PLL_CONFIGURATION2.PLL_IDLE status | ||
56 | * to be correctly reflected in the USB3PHY_PLL_STATUS register. | ||
57 | */ | ||
58 | # define PLL_IDLE_TIME 100; | ||
59 | |||
60 | enum sys_clk_rate { | ||
61 | CLK_RATE_UNDEFINED = -1, | ||
62 | CLK_RATE_12MHZ, | ||
63 | CLK_RATE_16MHZ, | ||
64 | CLK_RATE_19MHZ, | ||
65 | CLK_RATE_26MHZ, | ||
66 | CLK_RATE_38MHZ | ||
67 | }; | ||
68 | |||
69 | static struct usb_dpll_params omap_usb3_dpll_params[NUM_SYS_CLKS] = { | ||
70 | {1250, 5, 4, 20, 0}, /* 12 MHz */ | ||
71 | {3125, 20, 4, 20, 0}, /* 16.8 MHz */ | ||
72 | {1172, 8, 4, 20, 65537}, /* 19.2 MHz */ | ||
73 | {1250, 12, 4, 20, 0}, /* 26 MHz */ | ||
74 | {3125, 47, 4, 20, 92843}, /* 38.4 MHz */ | ||
75 | }; | ||
76 | |||
77 | static int omap_usb3_suspend(struct usb_phy *x, int suspend) | ||
78 | { | ||
79 | struct omap_usb *phy = phy_to_omapusb(x); | ||
80 | int val; | ||
81 | int timeout = PLL_IDLE_TIME; | ||
82 | |||
83 | if (suspend && !phy->is_suspended) { | ||
84 | val = omap_usb_readl(phy->pll_ctrl_base, PLL_CONFIGURATION2); | ||
85 | val |= PLL_IDLE; | ||
86 | omap_usb_writel(phy->pll_ctrl_base, PLL_CONFIGURATION2, val); | ||
87 | |||
88 | do { | ||
89 | val = omap_usb_readl(phy->pll_ctrl_base, PLL_STATUS); | ||
90 | if (val & PLL_TICOPWDN) | ||
91 | break; | ||
92 | udelay(1); | ||
93 | } while (--timeout); | ||
94 | |||
95 | omap_control_usb3_phy_power(phy->control_dev, 0); | ||
96 | |||
97 | phy->is_suspended = 1; | ||
98 | } else if (!suspend && phy->is_suspended) { | ||
99 | phy->is_suspended = 0; | ||
100 | |||
101 | val = omap_usb_readl(phy->pll_ctrl_base, PLL_CONFIGURATION2); | ||
102 | val &= ~PLL_IDLE; | ||
103 | omap_usb_writel(phy->pll_ctrl_base, PLL_CONFIGURATION2, val); | ||
104 | |||
105 | do { | ||
106 | val = omap_usb_readl(phy->pll_ctrl_base, PLL_STATUS); | ||
107 | if (!(val & PLL_TICOPWDN)) | ||
108 | break; | ||
109 | udelay(1); | ||
110 | } while (--timeout); | ||
111 | } | ||
112 | |||
113 | return 0; | ||
114 | } | ||
115 | |||
116 | static inline enum sys_clk_rate __get_sys_clk_index(unsigned long rate) | ||
117 | { | ||
118 | switch (rate) { | ||
119 | case 12000000: | ||
120 | return CLK_RATE_12MHZ; | ||
121 | case 16800000: | ||
122 | return CLK_RATE_16MHZ; | ||
123 | case 19200000: | ||
124 | return CLK_RATE_19MHZ; | ||
125 | case 26000000: | ||
126 | return CLK_RATE_26MHZ; | ||
127 | case 38400000: | ||
128 | return CLK_RATE_38MHZ; | ||
129 | default: | ||
130 | return CLK_RATE_UNDEFINED; | ||
131 | } | ||
132 | } | ||
133 | |||
134 | static void omap_usb_dpll_relock(struct omap_usb *phy) | ||
135 | { | ||
136 | u32 val; | ||
137 | unsigned long timeout; | ||
138 | |||
139 | omap_usb_writel(phy->pll_ctrl_base, PLL_GO, SET_PLL_GO); | ||
140 | |||
141 | timeout = jiffies + msecs_to_jiffies(20); | ||
142 | do { | ||
143 | val = omap_usb_readl(phy->pll_ctrl_base, PLL_STATUS); | ||
144 | if (val & PLL_LOCK) | ||
145 | break; | ||
146 | } while (!WARN_ON(time_after(jiffies, timeout))); | ||
147 | } | ||
148 | |||
149 | static int omap_usb_dpll_lock(struct omap_usb *phy) | ||
150 | { | ||
151 | u32 val; | ||
152 | unsigned long rate; | ||
153 | enum sys_clk_rate clk_index; | ||
154 | |||
155 | rate = clk_get_rate(phy->sys_clk); | ||
156 | clk_index = __get_sys_clk_index(rate); | ||
157 | |||
158 | if (clk_index == CLK_RATE_UNDEFINED) { | ||
159 | pr_err("dpll cannot be locked for sys clk freq:%luHz\n", rate); | ||
160 | return -EINVAL; | ||
161 | } | ||
162 | |||
163 | val = omap_usb_readl(phy->pll_ctrl_base, PLL_CONFIGURATION1); | ||
164 | val &= ~PLL_REGN_MASK; | ||
165 | val |= omap_usb3_dpll_params[clk_index].n << PLL_REGN_SHIFT; | ||
166 | omap_usb_writel(phy->pll_ctrl_base, PLL_CONFIGURATION1, val); | ||
167 | |||
168 | val = omap_usb_readl(phy->pll_ctrl_base, PLL_CONFIGURATION2); | ||
169 | val &= ~PLL_SELFREQDCO_MASK; | ||
170 | val |= omap_usb3_dpll_params[clk_index].freq << PLL_SELFREQDCO_SHIFT; | ||
171 | omap_usb_writel(phy->pll_ctrl_base, PLL_CONFIGURATION2, val); | ||
172 | |||
173 | val = omap_usb_readl(phy->pll_ctrl_base, PLL_CONFIGURATION1); | ||
174 | val &= ~PLL_REGM_MASK; | ||
175 | val |= omap_usb3_dpll_params[clk_index].m << PLL_REGM_SHIFT; | ||
176 | omap_usb_writel(phy->pll_ctrl_base, PLL_CONFIGURATION1, val); | ||
177 | |||
178 | val = omap_usb_readl(phy->pll_ctrl_base, PLL_CONFIGURATION4); | ||
179 | val &= ~PLL_REGM_F_MASK; | ||
180 | val |= omap_usb3_dpll_params[clk_index].mf << PLL_REGM_F_SHIFT; | ||
181 | omap_usb_writel(phy->pll_ctrl_base, PLL_CONFIGURATION4, val); | ||
182 | |||
183 | val = omap_usb_readl(phy->pll_ctrl_base, PLL_CONFIGURATION3); | ||
184 | val &= ~PLL_SD_MASK; | ||
185 | val |= omap_usb3_dpll_params[clk_index].sd << PLL_SD_SHIFT; | ||
186 | omap_usb_writel(phy->pll_ctrl_base, PLL_CONFIGURATION3, val); | ||
187 | |||
188 | omap_usb_dpll_relock(phy); | ||
189 | |||
190 | return 0; | ||
191 | } | ||
192 | |||
193 | static int omap_usb3_init(struct usb_phy *x) | ||
194 | { | ||
195 | struct omap_usb *phy = phy_to_omapusb(x); | ||
196 | |||
197 | omap_usb_dpll_lock(phy); | ||
198 | omap_control_usb3_phy_power(phy->control_dev, 1); | ||
199 | |||
200 | return 0; | ||
201 | } | ||
202 | |||
203 | static int omap_usb3_probe(struct platform_device *pdev) | ||
204 | { | ||
205 | struct omap_usb *phy; | ||
206 | struct resource *res; | ||
207 | |||
208 | phy = devm_kzalloc(&pdev->dev, sizeof(*phy), GFP_KERNEL); | ||
209 | if (!phy) { | ||
210 | dev_err(&pdev->dev, "unable to alloc mem for OMAP USB3 PHY\n"); | ||
211 | return -ENOMEM; | ||
212 | } | ||
213 | |||
214 | res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "pll_ctrl"); | ||
215 | phy->pll_ctrl_base = devm_request_and_ioremap(&pdev->dev, res); | ||
216 | if (!phy->pll_ctrl_base) { | ||
217 | dev_err(&pdev->dev, "ioremap of pll_ctrl failed\n"); | ||
218 | return -ENOMEM; | ||
219 | } | ||
220 | |||
221 | phy->dev = &pdev->dev; | ||
222 | |||
223 | phy->phy.dev = phy->dev; | ||
224 | phy->phy.label = "omap-usb3"; | ||
225 | phy->phy.init = omap_usb3_init; | ||
226 | phy->phy.set_suspend = omap_usb3_suspend; | ||
227 | phy->phy.type = USB_PHY_TYPE_USB3; | ||
228 | |||
229 | phy->is_suspended = 1; | ||
230 | phy->wkupclk = devm_clk_get(phy->dev, "usb_phy_cm_clk32k"); | ||
231 | if (IS_ERR(phy->wkupclk)) { | ||
232 | dev_err(&pdev->dev, "unable to get usb_phy_cm_clk32k\n"); | ||
233 | return PTR_ERR(phy->wkupclk); | ||
234 | } | ||
235 | clk_prepare(phy->wkupclk); | ||
236 | |||
237 | phy->optclk = devm_clk_get(phy->dev, "usb_otg_ss_refclk960m"); | ||
238 | if (IS_ERR(phy->optclk)) { | ||
239 | dev_err(&pdev->dev, "unable to get usb_otg_ss_refclk960m\n"); | ||
240 | return PTR_ERR(phy->optclk); | ||
241 | } | ||
242 | clk_prepare(phy->optclk); | ||
243 | |||
244 | phy->sys_clk = devm_clk_get(phy->dev, "sys_clkin"); | ||
245 | if (IS_ERR(phy->sys_clk)) { | ||
246 | pr_err("%s: unable to get sys_clkin\n", __func__); | ||
247 | return -EINVAL; | ||
248 | } | ||
249 | |||
250 | phy->control_dev = omap_get_control_dev(); | ||
251 | if (IS_ERR(phy->control_dev)) { | ||
252 | dev_dbg(&pdev->dev, "Failed to get control device\n"); | ||
253 | return -ENODEV; | ||
254 | } | ||
255 | |||
256 | omap_control_usb3_phy_power(phy->control_dev, 0); | ||
257 | usb_add_phy_dev(&phy->phy); | ||
258 | |||
259 | platform_set_drvdata(pdev, phy); | ||
260 | |||
261 | pm_runtime_enable(phy->dev); | ||
262 | pm_runtime_get(&pdev->dev); | ||
263 | |||
264 | return 0; | ||
265 | } | ||
266 | |||
267 | static int omap_usb3_remove(struct platform_device *pdev) | ||
268 | { | ||
269 | struct omap_usb *phy = platform_get_drvdata(pdev); | ||
270 | |||
271 | clk_unprepare(phy->wkupclk); | ||
272 | clk_unprepare(phy->optclk); | ||
273 | usb_remove_phy(&phy->phy); | ||
274 | if (!pm_runtime_suspended(&pdev->dev)) | ||
275 | pm_runtime_put(&pdev->dev); | ||
276 | pm_runtime_disable(&pdev->dev); | ||
277 | |||
278 | return 0; | ||
279 | } | ||
280 | |||
281 | #ifdef CONFIG_PM_RUNTIME | ||
282 | |||
283 | static int omap_usb3_runtime_suspend(struct device *dev) | ||
284 | { | ||
285 | struct platform_device *pdev = to_platform_device(dev); | ||
286 | struct omap_usb *phy = platform_get_drvdata(pdev); | ||
287 | |||
288 | clk_disable(phy->wkupclk); | ||
289 | clk_disable(phy->optclk); | ||
290 | |||
291 | return 0; | ||
292 | } | ||
293 | |||
294 | static int omap_usb3_runtime_resume(struct device *dev) | ||
295 | { | ||
296 | u32 ret = 0; | ||
297 | struct platform_device *pdev = to_platform_device(dev); | ||
298 | struct omap_usb *phy = platform_get_drvdata(pdev); | ||
299 | |||
300 | ret = clk_enable(phy->optclk); | ||
301 | if (ret) { | ||
302 | dev_err(phy->dev, "Failed to enable optclk %d\n", ret); | ||
303 | goto err1; | ||
304 | } | ||
305 | |||
306 | ret = clk_enable(phy->wkupclk); | ||
307 | if (ret) { | ||
308 | dev_err(phy->dev, "Failed to enable wkupclk %d\n", ret); | ||
309 | goto err2; | ||
310 | } | ||
311 | |||
312 | return 0; | ||
313 | |||
314 | err2: | ||
315 | clk_disable(phy->optclk); | ||
316 | |||
317 | err1: | ||
318 | return ret; | ||
319 | } | ||
320 | |||
321 | static const struct dev_pm_ops omap_usb3_pm_ops = { | ||
322 | SET_RUNTIME_PM_OPS(omap_usb3_runtime_suspend, omap_usb3_runtime_resume, | ||
323 | NULL) | ||
324 | }; | ||
325 | |||
326 | #define DEV_PM_OPS (&omap_usb3_pm_ops) | ||
327 | #else | ||
328 | #define DEV_PM_OPS NULL | ||
329 | #endif | ||
330 | |||
331 | #ifdef CONFIG_OF | ||
332 | static const struct of_device_id omap_usb3_id_table[] = { | ||
333 | { .compatible = "ti,omap-usb3" }, | ||
334 | {} | ||
335 | }; | ||
336 | MODULE_DEVICE_TABLE(of, omap_usb3_id_table); | ||
337 | #endif | ||
338 | |||
339 | static struct platform_driver omap_usb3_driver = { | ||
340 | .probe = omap_usb3_probe, | ||
341 | .remove = omap_usb3_remove, | ||
342 | .driver = { | ||
343 | .name = "omap-usb3", | ||
344 | .owner = THIS_MODULE, | ||
345 | .pm = DEV_PM_OPS, | ||
346 | .of_match_table = of_match_ptr(omap_usb3_id_table), | ||
347 | }, | ||
348 | }; | ||
349 | |||
350 | module_platform_driver(omap_usb3_driver); | ||
351 | |||
352 | MODULE_ALIAS("platform: omap_usb3"); | ||
353 | MODULE_AUTHOR("Texas Instruments Inc."); | ||
354 | MODULE_DESCRIPTION("OMAP USB3 phy driver"); | ||
355 | MODULE_LICENSE("GPL v2"); | ||