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746bfe63 YS |
1 | /* |
2 | * Renesas USB3.0 Peripheral driver (USB gadget) | |
3 | * | |
4 | * Copyright (C) 2015 Renesas Electronics Corporation | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; version 2 of the License. | |
9 | */ | |
10 | ||
11 | #include <linux/delay.h> | |
12 | #include <linux/err.h> | |
13 | #include <linux/interrupt.h> | |
14 | #include <linux/io.h> | |
15 | #include <linux/module.h> | |
16 | #include <linux/of_device.h> | |
17 | #include <linux/platform_device.h> | |
18 | #include <linux/pm_runtime.h> | |
19 | #include <linux/sizes.h> | |
20 | #include <linux/slab.h> | |
21 | #include <linux/usb/ch9.h> | |
22 | #include <linux/usb/gadget.h> | |
23 | ||
24 | /* register definitions */ | |
25 | #define USB3_AXI_INT_STA 0x008 | |
26 | #define USB3_AXI_INT_ENA 0x00c | |
27 | #define USB3_DMA_INT_STA 0x010 | |
28 | #define USB3_DMA_INT_ENA 0x014 | |
29 | #define USB3_USB_COM_CON 0x200 | |
30 | #define USB3_USB20_CON 0x204 | |
31 | #define USB3_USB30_CON 0x208 | |
32 | #define USB3_USB_STA 0x210 | |
33 | #define USB3_DRD_CON 0x218 | |
34 | #define USB3_USB_INT_STA_1 0x220 | |
35 | #define USB3_USB_INT_STA_2 0x224 | |
36 | #define USB3_USB_INT_ENA_1 0x228 | |
37 | #define USB3_USB_INT_ENA_2 0x22c | |
38 | #define USB3_STUP_DAT_0 0x230 | |
39 | #define USB3_STUP_DAT_1 0x234 | |
40 | #define USB3_P0_MOD 0x280 | |
41 | #define USB3_P0_CON 0x288 | |
42 | #define USB3_P0_STA 0x28c | |
43 | #define USB3_P0_INT_STA 0x290 | |
44 | #define USB3_P0_INT_ENA 0x294 | |
45 | #define USB3_P0_LNG 0x2a0 | |
46 | #define USB3_P0_READ 0x2a4 | |
47 | #define USB3_P0_WRITE 0x2a8 | |
48 | #define USB3_PIPE_COM 0x2b0 | |
49 | #define USB3_PN_MOD 0x2c0 | |
50 | #define USB3_PN_RAMMAP 0x2c4 | |
51 | #define USB3_PN_CON 0x2c8 | |
52 | #define USB3_PN_STA 0x2cc | |
53 | #define USB3_PN_INT_STA 0x2d0 | |
54 | #define USB3_PN_INT_ENA 0x2d4 | |
55 | #define USB3_PN_LNG 0x2e0 | |
56 | #define USB3_PN_READ 0x2e4 | |
57 | #define USB3_PN_WRITE 0x2e8 | |
58 | #define USB3_SSIFCMD 0x340 | |
59 | ||
60 | /* AXI_INT_ENA and AXI_INT_STA */ | |
61 | #define AXI_INT_DMAINT BIT(31) | |
62 | #define AXI_INT_EPCINT BIT(30) | |
63 | ||
64 | /* LCLKSEL */ | |
65 | #define LCLKSEL_LSEL BIT(18) | |
66 | ||
67 | /* USB_COM_CON */ | |
68 | #define USB_COM_CON_CONF BIT(24) | |
69 | #define USB_COM_CON_SPD_MODE BIT(17) | |
70 | #define USB_COM_CON_EP0_EN BIT(16) | |
71 | #define USB_COM_CON_DEV_ADDR_SHIFT 8 | |
72 | #define USB_COM_CON_DEV_ADDR_MASK GENMASK(14, USB_COM_CON_DEV_ADDR_SHIFT) | |
73 | #define USB_COM_CON_DEV_ADDR(n) (((n) << USB_COM_CON_DEV_ADDR_SHIFT) & \ | |
74 | USB_COM_CON_DEV_ADDR_MASK) | |
75 | #define USB_COM_CON_RX_DETECTION BIT(1) | |
76 | #define USB_COM_CON_PIPE_CLR BIT(0) | |
77 | ||
78 | /* USB20_CON */ | |
79 | #define USB20_CON_B2_PUE BIT(31) | |
80 | #define USB20_CON_B2_SUSPEND BIT(24) | |
81 | #define USB20_CON_B2_CONNECT BIT(17) | |
82 | #define USB20_CON_B2_TSTMOD_SHIFT 8 | |
83 | #define USB20_CON_B2_TSTMOD_MASK GENMASK(10, USB20_CON_B2_TSTMOD_SHIFT) | |
84 | #define USB20_CON_B2_TSTMOD(n) (((n) << USB20_CON_B2_TSTMOD_SHIFT) & \ | |
85 | USB20_CON_B2_TSTMOD_MASK) | |
86 | #define USB20_CON_B2_TSTMOD_EN BIT(0) | |
87 | ||
88 | /* USB30_CON */ | |
89 | #define USB30_CON_POW_SEL_SHIFT 24 | |
90 | #define USB30_CON_POW_SEL_MASK GENMASK(26, USB30_CON_POW_SEL_SHIFT) | |
91 | #define USB30_CON_POW_SEL_IN_U3 BIT(26) | |
92 | #define USB30_CON_POW_SEL_IN_DISCON 0 | |
93 | #define USB30_CON_POW_SEL_P2_TO_P0 BIT(25) | |
94 | #define USB30_CON_POW_SEL_P0_TO_P3 BIT(24) | |
95 | #define USB30_CON_POW_SEL_P0_TO_P2 0 | |
96 | #define USB30_CON_B3_PLLWAKE BIT(23) | |
97 | #define USB30_CON_B3_CONNECT BIT(17) | |
98 | #define USB30_CON_B3_HOTRST_CMP BIT(1) | |
99 | ||
100 | /* USB_STA */ | |
101 | #define USB_STA_SPEED_MASK (BIT(2) | BIT(1)) | |
102 | #define USB_STA_SPEED_HS BIT(2) | |
103 | #define USB_STA_SPEED_FS BIT(1) | |
104 | #define USB_STA_SPEED_SS 0 | |
105 | #define USB_STA_VBUS_STA BIT(0) | |
106 | ||
107 | /* DRD_CON */ | |
108 | #define DRD_CON_PERI_CON BIT(24) | |
b2f1eaae | 109 | #define DRD_CON_VBOUT BIT(0) |
746bfe63 YS |
110 | |
111 | /* USB_INT_ENA_1 and USB_INT_STA_1 */ | |
112 | #define USB_INT_1_B3_PLLWKUP BIT(31) | |
113 | #define USB_INT_1_B3_LUPSUCS BIT(30) | |
114 | #define USB_INT_1_B3_DISABLE BIT(27) | |
115 | #define USB_INT_1_B3_WRMRST BIT(21) | |
116 | #define USB_INT_1_B3_HOTRST BIT(20) | |
117 | #define USB_INT_1_B2_USBRST BIT(12) | |
118 | #define USB_INT_1_B2_L1SPND BIT(11) | |
119 | #define USB_INT_1_B2_SPND BIT(9) | |
120 | #define USB_INT_1_B2_RSUM BIT(8) | |
121 | #define USB_INT_1_SPEED BIT(1) | |
122 | #define USB_INT_1_VBUS_CNG BIT(0) | |
123 | ||
124 | /* USB_INT_ENA_2 and USB_INT_STA_2 */ | |
125 | #define USB_INT_2_PIPE(n) BIT(n) | |
126 | ||
127 | /* P0_MOD */ | |
128 | #define P0_MOD_DIR BIT(6) | |
129 | ||
130 | /* P0_CON and PN_CON */ | |
131 | #define PX_CON_BYTE_EN_MASK (BIT(10) | BIT(9)) | |
132 | #define PX_CON_BYTE_EN_SHIFT 9 | |
133 | #define PX_CON_BYTE_EN_BYTES(n) (((n) << PX_CON_BYTE_EN_SHIFT) & \ | |
134 | PX_CON_BYTE_EN_MASK) | |
135 | #define PX_CON_SEND BIT(8) | |
136 | ||
137 | /* P0_CON */ | |
138 | #define P0_CON_ST_RES_MASK (BIT(27) | BIT(26)) | |
139 | #define P0_CON_ST_RES_FORCE_STALL BIT(27) | |
140 | #define P0_CON_ST_RES_NORMAL BIT(26) | |
141 | #define P0_CON_ST_RES_FORCE_NRDY 0 | |
142 | #define P0_CON_OT_RES_MASK (BIT(25) | BIT(24)) | |
143 | #define P0_CON_OT_RES_FORCE_STALL BIT(25) | |
144 | #define P0_CON_OT_RES_NORMAL BIT(24) | |
145 | #define P0_CON_OT_RES_FORCE_NRDY 0 | |
146 | #define P0_CON_IN_RES_MASK (BIT(17) | BIT(16)) | |
147 | #define P0_CON_IN_RES_FORCE_STALL BIT(17) | |
148 | #define P0_CON_IN_RES_NORMAL BIT(16) | |
149 | #define P0_CON_IN_RES_FORCE_NRDY 0 | |
150 | #define P0_CON_RES_WEN BIT(7) | |
151 | #define P0_CON_BCLR BIT(1) | |
152 | ||
153 | /* P0_STA and PN_STA */ | |
154 | #define PX_STA_BUFSTS BIT(0) | |
155 | ||
156 | /* P0_INT_ENA and P0_INT_STA */ | |
157 | #define P0_INT_STSED BIT(18) | |
158 | #define P0_INT_STSST BIT(17) | |
159 | #define P0_INT_SETUP BIT(16) | |
160 | #define P0_INT_RCVNL BIT(8) | |
161 | #define P0_INT_ERDY BIT(7) | |
162 | #define P0_INT_FLOW BIT(6) | |
163 | #define P0_INT_STALL BIT(2) | |
164 | #define P0_INT_NRDY BIT(1) | |
165 | #define P0_INT_BFRDY BIT(0) | |
166 | #define P0_INT_ALL_BITS (P0_INT_STSED | P0_INT_SETUP | P0_INT_BFRDY) | |
167 | ||
168 | /* PN_MOD */ | |
169 | #define PN_MOD_DIR BIT(6) | |
170 | #define PN_MOD_TYPE_SHIFT 4 | |
171 | #define PN_MOD_TYPE_MASK GENMASK(5, PN_MOD_TYPE_SHIFT) | |
172 | #define PN_MOD_TYPE(n) (((n) << PN_MOD_TYPE_SHIFT) & \ | |
173 | PN_MOD_TYPE_MASK) | |
174 | #define PN_MOD_EPNUM_MASK GENMASK(3, 0) | |
175 | #define PN_MOD_EPNUM(n) ((n) & PN_MOD_EPNUM_MASK) | |
176 | ||
177 | /* PN_RAMMAP */ | |
178 | #define PN_RAMMAP_RAMAREA_SHIFT 29 | |
179 | #define PN_RAMMAP_RAMAREA_MASK GENMASK(31, PN_RAMMAP_RAMAREA_SHIFT) | |
180 | #define PN_RAMMAP_RAMAREA_16KB BIT(31) | |
181 | #define PN_RAMMAP_RAMAREA_8KB (BIT(30) | BIT(29)) | |
182 | #define PN_RAMMAP_RAMAREA_4KB BIT(30) | |
183 | #define PN_RAMMAP_RAMAREA_2KB BIT(29) | |
184 | #define PN_RAMMAP_RAMAREA_1KB 0 | |
185 | #define PN_RAMMAP_MPKT_SHIFT 16 | |
186 | #define PN_RAMMAP_MPKT_MASK GENMASK(26, PN_RAMMAP_MPKT_SHIFT) | |
187 | #define PN_RAMMAP_MPKT(n) (((n) << PN_RAMMAP_MPKT_SHIFT) & \ | |
188 | PN_RAMMAP_MPKT_MASK) | |
189 | #define PN_RAMMAP_RAMIF_SHIFT 14 | |
190 | #define PN_RAMMAP_RAMIF_MASK GENMASK(15, PN_RAMMAP_RAMIF_SHIFT) | |
191 | #define PN_RAMMAP_RAMIF(n) (((n) << PN_RAMMAP_RAMIF_SHIFT) & \ | |
192 | PN_RAMMAP_RAMIF_MASK) | |
193 | #define PN_RAMMAP_BASEAD_MASK GENMASK(13, 0) | |
194 | #define PN_RAMMAP_BASEAD(offs) (((offs) >> 3) & PN_RAMMAP_BASEAD_MASK) | |
195 | #define PN_RAMMAP_DATA(area, ramif, basead) ((PN_RAMMAP_##area) | \ | |
196 | (PN_RAMMAP_RAMIF(ramif)) | \ | |
197 | (PN_RAMMAP_BASEAD(basead))) | |
198 | ||
199 | /* PN_CON */ | |
200 | #define PN_CON_EN BIT(31) | |
201 | #define PN_CON_DATAIF_EN BIT(30) | |
202 | #define PN_CON_RES_MASK (BIT(17) | BIT(16)) | |
203 | #define PN_CON_RES_FORCE_STALL BIT(17) | |
204 | #define PN_CON_RES_NORMAL BIT(16) | |
205 | #define PN_CON_RES_FORCE_NRDY 0 | |
206 | #define PN_CON_LAST BIT(11) | |
207 | #define PN_CON_RES_WEN BIT(7) | |
208 | #define PN_CON_CLR BIT(0) | |
209 | ||
210 | /* PN_INT_STA and PN_INT_ENA */ | |
211 | #define PN_INT_LSTTR BIT(4) | |
212 | #define PN_INT_BFRDY BIT(0) | |
213 | ||
214 | /* USB3_SSIFCMD */ | |
215 | #define SSIFCMD_URES_U2 BIT(9) | |
216 | #define SSIFCMD_URES_U1 BIT(8) | |
217 | #define SSIFCMD_UDIR_U2 BIT(7) | |
218 | #define SSIFCMD_UDIR_U1 BIT(6) | |
219 | #define SSIFCMD_UREQ_U2 BIT(5) | |
220 | #define SSIFCMD_UREQ_U1 BIT(4) | |
221 | ||
222 | #define USB3_EP0_SS_MAX_PACKET_SIZE 512 | |
223 | #define USB3_EP0_HSFS_MAX_PACKET_SIZE 64 | |
224 | #define USB3_EP0_BUF_SIZE 8 | |
225 | #define USB3_MAX_NUM_PIPES 30 | |
226 | #define USB3_WAIT_US 3 | |
227 | ||
228 | struct renesas_usb3; | |
229 | struct renesas_usb3_request { | |
230 | struct usb_request req; | |
231 | struct list_head queue; | |
232 | }; | |
233 | ||
234 | #define USB3_EP_NAME_SIZE 8 | |
235 | struct renesas_usb3_ep { | |
236 | struct usb_ep ep; | |
237 | struct renesas_usb3 *usb3; | |
238 | int num; | |
239 | char ep_name[USB3_EP_NAME_SIZE]; | |
240 | struct list_head queue; | |
241 | u32 rammap_val; | |
242 | bool dir_in; | |
243 | bool halt; | |
244 | bool wedge; | |
245 | bool started; | |
246 | }; | |
247 | ||
248 | struct renesas_usb3_priv { | |
249 | int ramsize_per_ramif; /* unit = bytes */ | |
250 | int num_ramif; | |
251 | int ramsize_per_pipe; /* unit = bytes */ | |
252 | bool workaround_for_vbus; /* if true, don't check vbus signal */ | |
253 | }; | |
254 | ||
255 | struct renesas_usb3 { | |
256 | void __iomem *reg; | |
257 | ||
258 | struct usb_gadget gadget; | |
259 | struct usb_gadget_driver *driver; | |
260 | ||
261 | struct renesas_usb3_ep *usb3_ep; | |
262 | int num_usb3_eps; | |
263 | ||
264 | spinlock_t lock; | |
265 | int disabled_count; | |
266 | ||
267 | struct usb_request *ep0_req; | |
268 | u16 test_mode; | |
269 | u8 ep0_buf[USB3_EP0_BUF_SIZE]; | |
270 | bool softconnect; | |
271 | bool workaround_for_vbus; | |
272 | }; | |
273 | ||
274 | #define gadget_to_renesas_usb3(_gadget) \ | |
275 | container_of(_gadget, struct renesas_usb3, gadget) | |
276 | #define renesas_usb3_to_gadget(renesas_usb3) (&renesas_usb3->gadget) | |
277 | #define usb3_to_dev(_usb3) (_usb3->gadget.dev.parent) | |
278 | ||
279 | #define usb_ep_to_usb3_ep(_ep) container_of(_ep, struct renesas_usb3_ep, ep) | |
280 | #define usb3_ep_to_usb3(_usb3_ep) (_usb3_ep->usb3) | |
281 | #define usb_req_to_usb3_req(_req) container_of(_req, \ | |
282 | struct renesas_usb3_request, req) | |
283 | ||
284 | #define usb3_get_ep(usb3, n) ((usb3)->usb3_ep + (n)) | |
285 | #define usb3_for_each_ep(usb3_ep, usb3, i) \ | |
286 | for ((i) = 0, usb3_ep = usb3_get_ep(usb3, (i)); \ | |
287 | (i) < (usb3)->num_usb3_eps; \ | |
288 | (i)++, usb3_ep = usb3_get_ep(usb3, (i))) | |
289 | ||
290 | static const char udc_name[] = "renesas_usb3"; | |
291 | ||
292 | static void usb3_write(struct renesas_usb3 *usb3, u32 data, u32 offs) | |
293 | { | |
294 | iowrite32(data, usb3->reg + offs); | |
295 | } | |
296 | ||
297 | static u32 usb3_read(struct renesas_usb3 *usb3, u32 offs) | |
298 | { | |
299 | return ioread32(usb3->reg + offs); | |
300 | } | |
301 | ||
302 | static void usb3_set_bit(struct renesas_usb3 *usb3, u32 bits, u32 offs) | |
303 | { | |
304 | u32 val = usb3_read(usb3, offs); | |
305 | ||
306 | val |= bits; | |
307 | usb3_write(usb3, val, offs); | |
308 | } | |
309 | ||
310 | static void usb3_clear_bit(struct renesas_usb3 *usb3, u32 bits, u32 offs) | |
311 | { | |
312 | u32 val = usb3_read(usb3, offs); | |
313 | ||
314 | val &= ~bits; | |
315 | usb3_write(usb3, val, offs); | |
316 | } | |
317 | ||
318 | static int usb3_wait(struct renesas_usb3 *usb3, u32 reg, u32 mask, | |
319 | u32 expected) | |
320 | { | |
321 | int i; | |
322 | ||
323 | for (i = 0; i < USB3_WAIT_US; i++) { | |
324 | if ((usb3_read(usb3, reg) & mask) == expected) | |
325 | return 0; | |
326 | udelay(1); | |
327 | } | |
328 | ||
329 | dev_dbg(usb3_to_dev(usb3), "%s: timed out (%8x, %08x, %08x)\n", | |
330 | __func__, reg, mask, expected); | |
331 | ||
332 | return -EBUSY; | |
333 | } | |
334 | ||
335 | static void usb3_enable_irq_1(struct renesas_usb3 *usb3, u32 bits) | |
336 | { | |
337 | usb3_set_bit(usb3, bits, USB3_USB_INT_ENA_1); | |
338 | } | |
339 | ||
340 | static void usb3_disable_irq_1(struct renesas_usb3 *usb3, u32 bits) | |
341 | { | |
342 | usb3_clear_bit(usb3, bits, USB3_USB_INT_ENA_1); | |
343 | } | |
344 | ||
345 | static void usb3_enable_pipe_irq(struct renesas_usb3 *usb3, int num) | |
346 | { | |
347 | usb3_set_bit(usb3, USB_INT_2_PIPE(num), USB3_USB_INT_ENA_2); | |
348 | } | |
349 | ||
350 | static void usb3_disable_pipe_irq(struct renesas_usb3 *usb3, int num) | |
351 | { | |
352 | usb3_clear_bit(usb3, USB_INT_2_PIPE(num), USB3_USB_INT_ENA_2); | |
353 | } | |
354 | ||
355 | static void usb3_init_axi_bridge(struct renesas_usb3 *usb3) | |
356 | { | |
357 | /* Set AXI_INT */ | |
358 | usb3_write(usb3, ~0, USB3_DMA_INT_STA); | |
359 | usb3_write(usb3, 0, USB3_DMA_INT_ENA); | |
360 | usb3_set_bit(usb3, AXI_INT_DMAINT | AXI_INT_EPCINT, USB3_AXI_INT_ENA); | |
361 | } | |
362 | ||
363 | static void usb3_init_epc_registers(struct renesas_usb3 *usb3) | |
364 | { | |
365 | /* FIXME: How to change host / peripheral mode as well? */ | |
366 | usb3_set_bit(usb3, DRD_CON_PERI_CON, USB3_DRD_CON); | |
b2f1eaae | 367 | usb3_clear_bit(usb3, DRD_CON_VBOUT, USB3_DRD_CON); |
746bfe63 YS |
368 | |
369 | usb3_write(usb3, ~0, USB3_USB_INT_STA_1); | |
370 | usb3_enable_irq_1(usb3, USB_INT_1_VBUS_CNG); | |
371 | } | |
372 | ||
373 | static bool usb3_wakeup_usb2_phy(struct renesas_usb3 *usb3) | |
374 | { | |
375 | if (!(usb3_read(usb3, USB3_USB20_CON) & USB20_CON_B2_SUSPEND)) | |
376 | return true; /* already waked it up */ | |
377 | ||
378 | usb3_clear_bit(usb3, USB20_CON_B2_SUSPEND, USB3_USB20_CON); | |
379 | usb3_enable_irq_1(usb3, USB_INT_1_B2_RSUM); | |
380 | ||
381 | return false; | |
382 | } | |
383 | ||
384 | static void usb3_usb2_pullup(struct renesas_usb3 *usb3, int pullup) | |
385 | { | |
386 | u32 bits = USB20_CON_B2_PUE | USB20_CON_B2_CONNECT; | |
387 | ||
388 | if (usb3->softconnect && pullup) | |
389 | usb3_set_bit(usb3, bits, USB3_USB20_CON); | |
390 | else | |
391 | usb3_clear_bit(usb3, bits, USB3_USB20_CON); | |
392 | } | |
393 | ||
394 | static void usb3_set_test_mode(struct renesas_usb3 *usb3) | |
395 | { | |
396 | u32 val = usb3_read(usb3, USB3_USB20_CON); | |
397 | ||
398 | val &= ~USB20_CON_B2_TSTMOD_MASK; | |
399 | val |= USB20_CON_B2_TSTMOD(usb3->test_mode); | |
400 | usb3_write(usb3, val | USB20_CON_B2_TSTMOD_EN, USB3_USB20_CON); | |
401 | if (!usb3->test_mode) | |
402 | usb3_clear_bit(usb3, USB20_CON_B2_TSTMOD_EN, USB3_USB20_CON); | |
403 | } | |
404 | ||
405 | static void usb3_start_usb2_connection(struct renesas_usb3 *usb3) | |
406 | { | |
407 | usb3->disabled_count++; | |
408 | usb3_set_bit(usb3, USB_COM_CON_EP0_EN, USB3_USB_COM_CON); | |
409 | usb3_set_bit(usb3, USB_COM_CON_SPD_MODE, USB3_USB_COM_CON); | |
410 | usb3_usb2_pullup(usb3, 1); | |
411 | } | |
412 | ||
413 | static int usb3_is_usb3_phy_in_u3(struct renesas_usb3 *usb3) | |
414 | { | |
415 | return usb3_read(usb3, USB3_USB30_CON) & USB30_CON_POW_SEL_IN_U3; | |
416 | } | |
417 | ||
418 | static bool usb3_wakeup_usb3_phy(struct renesas_usb3 *usb3) | |
419 | { | |
420 | if (!usb3_is_usb3_phy_in_u3(usb3)) | |
421 | return true; /* already waked it up */ | |
422 | ||
423 | usb3_set_bit(usb3, USB30_CON_B3_PLLWAKE, USB3_USB30_CON); | |
424 | usb3_enable_irq_1(usb3, USB_INT_1_B3_PLLWKUP); | |
425 | ||
426 | return false; | |
427 | } | |
428 | ||
429 | static u16 usb3_feature_get_un_enabled(struct renesas_usb3 *usb3) | |
430 | { | |
431 | u32 mask_u2 = SSIFCMD_UDIR_U2 | SSIFCMD_UREQ_U2; | |
432 | u32 mask_u1 = SSIFCMD_UDIR_U1 | SSIFCMD_UREQ_U1; | |
433 | u32 val = usb3_read(usb3, USB3_SSIFCMD); | |
434 | u16 ret = 0; | |
435 | ||
436 | /* Enables {U2,U1} if the bits of UDIR and UREQ are set to 0 */ | |
437 | if (!(val & mask_u2)) | |
438 | ret |= 1 << USB_DEV_STAT_U2_ENABLED; | |
439 | if (!(val & mask_u1)) | |
440 | ret |= 1 << USB_DEV_STAT_U1_ENABLED; | |
441 | ||
442 | return ret; | |
443 | } | |
444 | ||
445 | static void usb3_feature_u2_enable(struct renesas_usb3 *usb3, bool enable) | |
446 | { | |
447 | u32 bits = SSIFCMD_UDIR_U2 | SSIFCMD_UREQ_U2; | |
448 | ||
449 | /* Enables U2 if the bits of UDIR and UREQ are set to 0 */ | |
450 | if (enable) | |
451 | usb3_clear_bit(usb3, bits, USB3_SSIFCMD); | |
452 | else | |
453 | usb3_set_bit(usb3, bits, USB3_SSIFCMD); | |
454 | } | |
455 | ||
456 | static void usb3_feature_u1_enable(struct renesas_usb3 *usb3, bool enable) | |
457 | { | |
458 | u32 bits = SSIFCMD_UDIR_U1 | SSIFCMD_UREQ_U1; | |
459 | ||
460 | /* Enables U1 if the bits of UDIR and UREQ are set to 0 */ | |
461 | if (enable) | |
462 | usb3_clear_bit(usb3, bits, USB3_SSIFCMD); | |
463 | else | |
464 | usb3_set_bit(usb3, bits, USB3_SSIFCMD); | |
465 | } | |
466 | ||
467 | static void usb3_start_operation_for_usb3(struct renesas_usb3 *usb3) | |
468 | { | |
469 | usb3_set_bit(usb3, USB_COM_CON_EP0_EN, USB3_USB_COM_CON); | |
470 | usb3_clear_bit(usb3, USB_COM_CON_SPD_MODE, USB3_USB_COM_CON); | |
471 | usb3_set_bit(usb3, USB30_CON_B3_CONNECT, USB3_USB30_CON); | |
472 | } | |
473 | ||
474 | static void usb3_start_usb3_connection(struct renesas_usb3 *usb3) | |
475 | { | |
476 | usb3_start_operation_for_usb3(usb3); | |
477 | usb3_set_bit(usb3, USB_COM_CON_RX_DETECTION, USB3_USB_COM_CON); | |
478 | ||
479 | usb3_enable_irq_1(usb3, USB_INT_1_B3_LUPSUCS | USB_INT_1_B3_DISABLE | | |
480 | USB_INT_1_SPEED); | |
481 | } | |
482 | ||
483 | static void usb3_stop_usb3_connection(struct renesas_usb3 *usb3) | |
484 | { | |
485 | usb3_clear_bit(usb3, USB30_CON_B3_CONNECT, USB3_USB30_CON); | |
486 | } | |
487 | ||
488 | static void usb3_transition_to_default_state(struct renesas_usb3 *usb3, | |
489 | bool is_usb3) | |
490 | { | |
491 | usb3_set_bit(usb3, USB_INT_2_PIPE(0), USB3_USB_INT_ENA_2); | |
492 | usb3_write(usb3, P0_INT_ALL_BITS, USB3_P0_INT_STA); | |
493 | usb3_set_bit(usb3, P0_INT_ALL_BITS, USB3_P0_INT_ENA); | |
494 | ||
495 | if (is_usb3) | |
496 | usb3_enable_irq_1(usb3, USB_INT_1_B3_WRMRST | | |
497 | USB_INT_1_B3_HOTRST); | |
498 | else | |
499 | usb3_enable_irq_1(usb3, USB_INT_1_B2_SPND | | |
500 | USB_INT_1_B2_L1SPND | USB_INT_1_B2_USBRST); | |
501 | } | |
502 | ||
503 | static void usb3_connect(struct renesas_usb3 *usb3) | |
504 | { | |
505 | if (usb3_wakeup_usb3_phy(usb3)) | |
506 | usb3_start_usb3_connection(usb3); | |
507 | } | |
508 | ||
509 | static void usb3_reset_epc(struct renesas_usb3 *usb3) | |
510 | { | |
511 | usb3_clear_bit(usb3, USB_COM_CON_CONF, USB3_USB_COM_CON); | |
512 | usb3_clear_bit(usb3, USB_COM_CON_EP0_EN, USB3_USB_COM_CON); | |
513 | usb3_set_bit(usb3, USB_COM_CON_PIPE_CLR, USB3_USB_COM_CON); | |
514 | usb3->test_mode = 0; | |
515 | usb3_set_test_mode(usb3); | |
516 | } | |
517 | ||
518 | static void usb3_disconnect(struct renesas_usb3 *usb3) | |
519 | { | |
520 | usb3->disabled_count = 0; | |
521 | usb3_usb2_pullup(usb3, 0); | |
522 | usb3_clear_bit(usb3, USB30_CON_B3_CONNECT, USB3_USB30_CON); | |
523 | usb3_reset_epc(usb3); | |
524 | ||
525 | if (usb3->driver) | |
526 | usb3->driver->disconnect(&usb3->gadget); | |
527 | } | |
528 | ||
529 | static void usb3_check_vbus(struct renesas_usb3 *usb3) | |
530 | { | |
531 | if (usb3->workaround_for_vbus) { | |
532 | usb3_connect(usb3); | |
533 | } else { | |
534 | if (usb3_read(usb3, USB3_USB_STA) & USB_STA_VBUS_STA) | |
535 | usb3_connect(usb3); | |
536 | else | |
537 | usb3_disconnect(usb3); | |
538 | } | |
539 | } | |
540 | ||
541 | static void renesas_usb3_init_controller(struct renesas_usb3 *usb3) | |
542 | { | |
543 | usb3_init_axi_bridge(usb3); | |
544 | usb3_init_epc_registers(usb3); | |
545 | ||
546 | usb3_check_vbus(usb3); | |
547 | } | |
548 | ||
549 | static void renesas_usb3_stop_controller(struct renesas_usb3 *usb3) | |
550 | { | |
551 | usb3_disconnect(usb3); | |
552 | usb3_write(usb3, 0, USB3_P0_INT_ENA); | |
553 | usb3_write(usb3, 0, USB3_PN_INT_ENA); | |
554 | usb3_write(usb3, 0, USB3_USB_INT_ENA_1); | |
555 | usb3_write(usb3, 0, USB3_USB_INT_ENA_2); | |
556 | usb3_write(usb3, 0, USB3_AXI_INT_ENA); | |
557 | } | |
558 | ||
559 | static void usb3_irq_epc_int_1_pll_wakeup(struct renesas_usb3 *usb3) | |
560 | { | |
561 | usb3_disable_irq_1(usb3, USB_INT_1_B3_PLLWKUP); | |
562 | usb3_clear_bit(usb3, USB30_CON_B3_PLLWAKE, USB3_USB30_CON); | |
563 | usb3_start_usb3_connection(usb3); | |
564 | } | |
565 | ||
566 | static void usb3_irq_epc_int_1_linkup_success(struct renesas_usb3 *usb3) | |
567 | { | |
568 | usb3_transition_to_default_state(usb3, true); | |
569 | } | |
570 | ||
571 | static void usb3_irq_epc_int_1_resume(struct renesas_usb3 *usb3) | |
572 | { | |
573 | usb3_disable_irq_1(usb3, USB_INT_1_B2_RSUM); | |
574 | usb3_start_usb2_connection(usb3); | |
575 | usb3_transition_to_default_state(usb3, false); | |
576 | } | |
577 | ||
578 | static void usb3_irq_epc_int_1_disable(struct renesas_usb3 *usb3) | |
579 | { | |
580 | usb3_stop_usb3_connection(usb3); | |
581 | if (usb3_wakeup_usb2_phy(usb3)) | |
582 | usb3_irq_epc_int_1_resume(usb3); | |
583 | } | |
584 | ||
585 | static void usb3_irq_epc_int_1_bus_reset(struct renesas_usb3 *usb3) | |
586 | { | |
587 | usb3_reset_epc(usb3); | |
588 | if (usb3->disabled_count < 3) | |
589 | usb3_start_usb3_connection(usb3); | |
590 | else | |
591 | usb3_start_usb2_connection(usb3); | |
592 | } | |
593 | ||
594 | static void usb3_irq_epc_int_1_vbus_change(struct renesas_usb3 *usb3) | |
595 | { | |
596 | usb3_check_vbus(usb3); | |
597 | } | |
598 | ||
599 | static void usb3_irq_epc_int_1_hot_reset(struct renesas_usb3 *usb3) | |
600 | { | |
601 | usb3_reset_epc(usb3); | |
602 | usb3_set_bit(usb3, USB_COM_CON_EP0_EN, USB3_USB_COM_CON); | |
603 | ||
604 | /* This bit shall be set within 12ms from the start of HotReset */ | |
605 | usb3_set_bit(usb3, USB30_CON_B3_HOTRST_CMP, USB3_USB30_CON); | |
606 | } | |
607 | ||
608 | static void usb3_irq_epc_int_1_warm_reset(struct renesas_usb3 *usb3) | |
609 | { | |
610 | usb3_reset_epc(usb3); | |
611 | usb3_set_bit(usb3, USB_COM_CON_EP0_EN, USB3_USB_COM_CON); | |
612 | ||
613 | usb3_start_operation_for_usb3(usb3); | |
614 | usb3_enable_irq_1(usb3, USB_INT_1_SPEED); | |
615 | } | |
616 | ||
617 | static void usb3_irq_epc_int_1_speed(struct renesas_usb3 *usb3) | |
618 | { | |
619 | u32 speed = usb3_read(usb3, USB3_USB_STA) & USB_STA_SPEED_MASK; | |
620 | ||
621 | switch (speed) { | |
622 | case USB_STA_SPEED_SS: | |
623 | usb3->gadget.speed = USB_SPEED_SUPER; | |
624 | break; | |
625 | case USB_STA_SPEED_HS: | |
626 | usb3->gadget.speed = USB_SPEED_HIGH; | |
627 | break; | |
628 | case USB_STA_SPEED_FS: | |
629 | usb3->gadget.speed = USB_SPEED_FULL; | |
630 | break; | |
631 | default: | |
632 | usb3->gadget.speed = USB_SPEED_UNKNOWN; | |
633 | break; | |
634 | } | |
635 | } | |
636 | ||
637 | static void usb3_irq_epc_int_1(struct renesas_usb3 *usb3, u32 int_sta_1) | |
638 | { | |
639 | if (int_sta_1 & USB_INT_1_B3_PLLWKUP) | |
640 | usb3_irq_epc_int_1_pll_wakeup(usb3); | |
641 | ||
642 | if (int_sta_1 & USB_INT_1_B3_LUPSUCS) | |
643 | usb3_irq_epc_int_1_linkup_success(usb3); | |
644 | ||
645 | if (int_sta_1 & USB_INT_1_B3_HOTRST) | |
646 | usb3_irq_epc_int_1_hot_reset(usb3); | |
647 | ||
648 | if (int_sta_1 & USB_INT_1_B3_WRMRST) | |
649 | usb3_irq_epc_int_1_warm_reset(usb3); | |
650 | ||
651 | if (int_sta_1 & USB_INT_1_B3_DISABLE) | |
652 | usb3_irq_epc_int_1_disable(usb3); | |
653 | ||
654 | if (int_sta_1 & USB_INT_1_B2_USBRST) | |
655 | usb3_irq_epc_int_1_bus_reset(usb3); | |
656 | ||
657 | if (int_sta_1 & USB_INT_1_B2_RSUM) | |
658 | usb3_irq_epc_int_1_resume(usb3); | |
659 | ||
660 | if (int_sta_1 & USB_INT_1_SPEED) | |
661 | usb3_irq_epc_int_1_speed(usb3); | |
662 | ||
663 | if (int_sta_1 & USB_INT_1_VBUS_CNG) | |
664 | usb3_irq_epc_int_1_vbus_change(usb3); | |
665 | } | |
666 | ||
667 | static struct renesas_usb3_request *__usb3_get_request(struct renesas_usb3_ep | |
668 | *usb3_ep) | |
669 | { | |
670 | return list_first_entry_or_null(&usb3_ep->queue, | |
671 | struct renesas_usb3_request, queue); | |
672 | } | |
673 | ||
674 | static struct renesas_usb3_request *usb3_get_request(struct renesas_usb3_ep | |
675 | *usb3_ep) | |
676 | { | |
677 | struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep); | |
678 | struct renesas_usb3_request *usb3_req; | |
679 | unsigned long flags; | |
680 | ||
681 | spin_lock_irqsave(&usb3->lock, flags); | |
682 | usb3_req = __usb3_get_request(usb3_ep); | |
683 | spin_unlock_irqrestore(&usb3->lock, flags); | |
684 | ||
685 | return usb3_req; | |
686 | } | |
687 | ||
688 | static void usb3_request_done(struct renesas_usb3_ep *usb3_ep, | |
689 | struct renesas_usb3_request *usb3_req, int status) | |
690 | { | |
691 | struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep); | |
692 | unsigned long flags; | |
693 | ||
694 | dev_dbg(usb3_to_dev(usb3), "giveback: ep%2d, %u, %u, %d\n", | |
695 | usb3_ep->num, usb3_req->req.length, usb3_req->req.actual, | |
696 | status); | |
697 | usb3_req->req.status = status; | |
698 | spin_lock_irqsave(&usb3->lock, flags); | |
699 | usb3_ep->started = false; | |
700 | list_del_init(&usb3_req->queue); | |
701 | spin_unlock_irqrestore(&usb3->lock, flags); | |
702 | usb_gadget_giveback_request(&usb3_ep->ep, &usb3_req->req); | |
703 | } | |
704 | ||
705 | static void usb3_irq_epc_pipe0_status_end(struct renesas_usb3 *usb3) | |
706 | { | |
707 | struct renesas_usb3_ep *usb3_ep = usb3_get_ep(usb3, 0); | |
708 | struct renesas_usb3_request *usb3_req = usb3_get_request(usb3_ep); | |
709 | ||
710 | if (usb3_req) | |
711 | usb3_request_done(usb3_ep, usb3_req, 0); | |
712 | if (usb3->test_mode) | |
713 | usb3_set_test_mode(usb3); | |
714 | } | |
715 | ||
716 | static void usb3_get_setup_data(struct renesas_usb3 *usb3, | |
717 | struct usb_ctrlrequest *ctrl) | |
718 | { | |
719 | struct renesas_usb3_ep *usb3_ep = usb3_get_ep(usb3, 0); | |
720 | u32 *data = (u32 *)ctrl; | |
721 | ||
722 | *data++ = usb3_read(usb3, USB3_STUP_DAT_0); | |
723 | *data = usb3_read(usb3, USB3_STUP_DAT_1); | |
724 | ||
725 | /* update this driver's flag */ | |
726 | usb3_ep->dir_in = !!(ctrl->bRequestType & USB_DIR_IN); | |
727 | } | |
728 | ||
729 | static void usb3_set_p0_con_update_res(struct renesas_usb3 *usb3, u32 res) | |
730 | { | |
731 | u32 val = usb3_read(usb3, USB3_P0_CON); | |
732 | ||
733 | val &= ~(P0_CON_ST_RES_MASK | P0_CON_OT_RES_MASK | P0_CON_IN_RES_MASK); | |
734 | val |= res | P0_CON_RES_WEN; | |
735 | usb3_write(usb3, val, USB3_P0_CON); | |
736 | } | |
737 | ||
738 | static void usb3_set_p0_con_for_ctrl_read_data(struct renesas_usb3 *usb3) | |
739 | { | |
740 | usb3_set_p0_con_update_res(usb3, P0_CON_ST_RES_FORCE_NRDY | | |
741 | P0_CON_OT_RES_FORCE_STALL | | |
742 | P0_CON_IN_RES_NORMAL); | |
743 | } | |
744 | ||
745 | static void usb3_set_p0_con_for_ctrl_read_status(struct renesas_usb3 *usb3) | |
746 | { | |
747 | usb3_set_p0_con_update_res(usb3, P0_CON_ST_RES_NORMAL | | |
748 | P0_CON_OT_RES_FORCE_STALL | | |
749 | P0_CON_IN_RES_NORMAL); | |
750 | } | |
751 | ||
752 | static void usb3_set_p0_con_for_ctrl_write_data(struct renesas_usb3 *usb3) | |
753 | { | |
754 | usb3_set_p0_con_update_res(usb3, P0_CON_ST_RES_FORCE_NRDY | | |
755 | P0_CON_OT_RES_NORMAL | | |
756 | P0_CON_IN_RES_FORCE_STALL); | |
757 | } | |
758 | ||
759 | static void usb3_set_p0_con_for_ctrl_write_status(struct renesas_usb3 *usb3) | |
760 | { | |
761 | usb3_set_p0_con_update_res(usb3, P0_CON_ST_RES_NORMAL | | |
762 | P0_CON_OT_RES_NORMAL | | |
763 | P0_CON_IN_RES_FORCE_STALL); | |
764 | } | |
765 | ||
766 | static void usb3_set_p0_con_for_no_data(struct renesas_usb3 *usb3) | |
767 | { | |
768 | usb3_set_p0_con_update_res(usb3, P0_CON_ST_RES_NORMAL | | |
769 | P0_CON_OT_RES_FORCE_STALL | | |
770 | P0_CON_IN_RES_FORCE_STALL); | |
771 | } | |
772 | ||
773 | static void usb3_set_p0_con_stall(struct renesas_usb3 *usb3) | |
774 | { | |
775 | usb3_set_p0_con_update_res(usb3, P0_CON_ST_RES_FORCE_STALL | | |
776 | P0_CON_OT_RES_FORCE_STALL | | |
777 | P0_CON_IN_RES_FORCE_STALL); | |
778 | } | |
779 | ||
780 | static void usb3_set_p0_con_stop(struct renesas_usb3 *usb3) | |
781 | { | |
782 | usb3_set_p0_con_update_res(usb3, P0_CON_ST_RES_FORCE_NRDY | | |
783 | P0_CON_OT_RES_FORCE_NRDY | | |
784 | P0_CON_IN_RES_FORCE_NRDY); | |
785 | } | |
786 | ||
787 | static int usb3_pn_change(struct renesas_usb3 *usb3, int num) | |
788 | { | |
789 | if (num == 0 || num > usb3->num_usb3_eps) | |
790 | return -ENXIO; | |
791 | ||
792 | usb3_write(usb3, num, USB3_PIPE_COM); | |
793 | ||
794 | return 0; | |
795 | } | |
796 | ||
797 | static void usb3_set_pn_con_update_res(struct renesas_usb3 *usb3, u32 res) | |
798 | { | |
799 | u32 val = usb3_read(usb3, USB3_PN_CON); | |
800 | ||
801 | val &= ~PN_CON_RES_MASK; | |
802 | val |= res & PN_CON_RES_MASK; | |
803 | val |= PN_CON_RES_WEN; | |
804 | usb3_write(usb3, val, USB3_PN_CON); | |
805 | } | |
806 | ||
807 | static void usb3_pn_start(struct renesas_usb3 *usb3) | |
808 | { | |
809 | usb3_set_pn_con_update_res(usb3, PN_CON_RES_NORMAL); | |
810 | } | |
811 | ||
812 | static void usb3_pn_stop(struct renesas_usb3 *usb3) | |
813 | { | |
814 | usb3_set_pn_con_update_res(usb3, PN_CON_RES_FORCE_NRDY); | |
815 | } | |
816 | ||
817 | static void usb3_pn_stall(struct renesas_usb3 *usb3) | |
818 | { | |
819 | usb3_set_pn_con_update_res(usb3, PN_CON_RES_FORCE_STALL); | |
820 | } | |
821 | ||
822 | static int usb3_pn_con_clear(struct renesas_usb3 *usb3) | |
823 | { | |
824 | usb3_set_bit(usb3, PN_CON_CLR, USB3_PN_CON); | |
825 | ||
826 | return usb3_wait(usb3, USB3_PN_CON, PN_CON_CLR, 0); | |
827 | } | |
828 | ||
829 | static bool usb3_is_transfer_complete(struct renesas_usb3_ep *usb3_ep, | |
830 | struct renesas_usb3_request *usb3_req) | |
831 | { | |
832 | struct usb_request *req = &usb3_req->req; | |
833 | ||
834 | if ((!req->zero && req->actual == req->length) || | |
835 | (req->actual % usb3_ep->ep.maxpacket) || (req->length == 0)) | |
836 | return true; | |
837 | else | |
838 | return false; | |
839 | } | |
840 | ||
841 | static int usb3_wait_pipe_status(struct renesas_usb3_ep *usb3_ep, u32 mask) | |
842 | { | |
843 | struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep); | |
844 | u32 sta_reg = usb3_ep->num ? USB3_PN_STA : USB3_P0_STA; | |
845 | ||
846 | return usb3_wait(usb3, sta_reg, mask, mask); | |
847 | } | |
848 | ||
849 | static void usb3_set_px_con_send(struct renesas_usb3_ep *usb3_ep, int bytes, | |
850 | bool last) | |
851 | { | |
852 | struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep); | |
853 | u32 con_reg = usb3_ep->num ? USB3_PN_CON : USB3_P0_CON; | |
854 | u32 val = usb3_read(usb3, con_reg); | |
855 | ||
856 | val |= PX_CON_SEND | PX_CON_BYTE_EN_BYTES(bytes); | |
857 | val |= (usb3_ep->num && last) ? PN_CON_LAST : 0; | |
858 | usb3_write(usb3, val, con_reg); | |
859 | } | |
860 | ||
861 | static int usb3_write_pipe(struct renesas_usb3_ep *usb3_ep, | |
862 | struct renesas_usb3_request *usb3_req, | |
863 | u32 fifo_reg) | |
864 | { | |
865 | struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep); | |
866 | int i; | |
867 | int len = min_t(unsigned, usb3_req->req.length - usb3_req->req.actual, | |
868 | usb3_ep->ep.maxpacket); | |
869 | u8 *buf = usb3_req->req.buf + usb3_req->req.actual; | |
870 | u32 tmp = 0; | |
871 | bool is_last; | |
872 | ||
873 | if (usb3_wait_pipe_status(usb3_ep, PX_STA_BUFSTS) < 0) | |
874 | return -EBUSY; | |
875 | ||
876 | /* Update gadget driver parameter */ | |
877 | usb3_req->req.actual += len; | |
878 | ||
879 | /* Write data to the register */ | |
880 | if (len >= 4) { | |
881 | iowrite32_rep(usb3->reg + fifo_reg, buf, len / 4); | |
882 | buf += (len / 4) * 4; | |
883 | len %= 4; /* update len to use usb3_set_pX_con_send() */ | |
884 | } | |
885 | ||
886 | if (len) { | |
887 | for (i = 0; i < len; i++) | |
888 | tmp |= buf[i] << (8 * i); | |
889 | usb3_write(usb3, tmp, fifo_reg); | |
890 | } | |
891 | ||
892 | is_last = usb3_is_transfer_complete(usb3_ep, usb3_req); | |
893 | /* Send the data */ | |
894 | usb3_set_px_con_send(usb3_ep, len, is_last); | |
895 | ||
896 | return is_last ? 0 : -EAGAIN; | |
897 | } | |
898 | ||
899 | static u32 usb3_get_received_length(struct renesas_usb3_ep *usb3_ep) | |
900 | { | |
901 | struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep); | |
902 | u32 lng_reg = usb3_ep->num ? USB3_PN_LNG : USB3_P0_LNG; | |
903 | ||
904 | return usb3_read(usb3, lng_reg); | |
905 | } | |
906 | ||
907 | static int usb3_read_pipe(struct renesas_usb3_ep *usb3_ep, | |
908 | struct renesas_usb3_request *usb3_req, u32 fifo_reg) | |
909 | { | |
910 | struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep); | |
911 | int i; | |
912 | int len = min_t(unsigned, usb3_req->req.length - usb3_req->req.actual, | |
913 | usb3_get_received_length(usb3_ep)); | |
914 | u8 *buf = usb3_req->req.buf + usb3_req->req.actual; | |
915 | u32 tmp = 0; | |
916 | ||
917 | if (!len) | |
918 | return 0; | |
919 | ||
920 | /* Update gadget driver parameter */ | |
921 | usb3_req->req.actual += len; | |
922 | ||
923 | /* Read data from the register */ | |
924 | if (len >= 4) { | |
925 | ioread32_rep(usb3->reg + fifo_reg, buf, len / 4); | |
926 | buf += (len / 4) * 4; | |
927 | len %= 4; | |
928 | } | |
929 | ||
930 | if (len) { | |
931 | tmp = usb3_read(usb3, fifo_reg); | |
932 | for (i = 0; i < len; i++) | |
933 | buf[i] = (tmp >> (8 * i)) & 0xff; | |
934 | } | |
935 | ||
936 | return usb3_is_transfer_complete(usb3_ep, usb3_req) ? 0 : -EAGAIN; | |
937 | } | |
938 | ||
939 | static void usb3_set_status_stage(struct renesas_usb3_ep *usb3_ep, | |
940 | struct renesas_usb3_request *usb3_req) | |
941 | { | |
942 | struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep); | |
943 | ||
944 | if (usb3_ep->dir_in) { | |
945 | usb3_set_p0_con_for_ctrl_read_status(usb3); | |
946 | } else { | |
947 | if (!usb3_req->req.length) | |
948 | usb3_set_p0_con_for_no_data(usb3); | |
949 | else | |
950 | usb3_set_p0_con_for_ctrl_write_status(usb3); | |
951 | } | |
952 | } | |
953 | ||
954 | static void usb3_p0_xfer(struct renesas_usb3_ep *usb3_ep, | |
955 | struct renesas_usb3_request *usb3_req) | |
956 | { | |
957 | int ret = -EAGAIN; | |
958 | ||
959 | if (usb3_ep->dir_in) | |
960 | ret = usb3_write_pipe(usb3_ep, usb3_req, USB3_P0_WRITE); | |
961 | else | |
962 | ret = usb3_read_pipe(usb3_ep, usb3_req, USB3_P0_READ); | |
963 | ||
964 | if (!ret) | |
965 | usb3_set_status_stage(usb3_ep, usb3_req); | |
966 | } | |
967 | ||
968 | static void usb3_start_pipe0(struct renesas_usb3_ep *usb3_ep, | |
969 | struct renesas_usb3_request *usb3_req) | |
970 | { | |
971 | struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep); | |
972 | ||
973 | if (usb3_ep->started) | |
974 | return; | |
975 | ||
976 | usb3_ep->started = true; | |
977 | ||
978 | if (usb3_ep->dir_in) { | |
979 | usb3_set_bit(usb3, P0_MOD_DIR, USB3_P0_MOD); | |
980 | usb3_set_p0_con_for_ctrl_read_data(usb3); | |
981 | } else { | |
982 | usb3_clear_bit(usb3, P0_MOD_DIR, USB3_P0_MOD); | |
983 | usb3_set_p0_con_for_ctrl_write_data(usb3); | |
984 | } | |
985 | ||
986 | usb3_p0_xfer(usb3_ep, usb3_req); | |
987 | } | |
988 | ||
989 | static void usb3_start_pipen(struct renesas_usb3_ep *usb3_ep, | |
990 | struct renesas_usb3_request *usb3_req) | |
991 | { | |
992 | struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep); | |
993 | struct renesas_usb3_request *usb3_req_first = usb3_get_request(usb3_ep); | |
994 | unsigned long flags; | |
995 | int ret = -EAGAIN; | |
996 | u32 enable_bits = 0; | |
997 | ||
998 | if (usb3_ep->halt || usb3_ep->started) | |
999 | return; | |
1000 | if (usb3_req != usb3_req_first) | |
1001 | return; | |
1002 | ||
1003 | spin_lock_irqsave(&usb3->lock, flags); | |
1004 | if (usb3_pn_change(usb3, usb3_ep->num) < 0) | |
1005 | goto out; | |
1006 | ||
1007 | usb3_ep->started = true; | |
1008 | usb3_pn_start(usb3); | |
1009 | ||
1010 | if (usb3_ep->dir_in) { | |
1011 | ret = usb3_write_pipe(usb3_ep, usb3_req, USB3_PN_WRITE); | |
1012 | enable_bits |= PN_INT_LSTTR; | |
1013 | } | |
1014 | ||
1015 | if (ret < 0) | |
1016 | enable_bits |= PN_INT_BFRDY; | |
1017 | ||
1018 | if (enable_bits) { | |
1019 | usb3_set_bit(usb3, enable_bits, USB3_PN_INT_ENA); | |
1020 | usb3_enable_pipe_irq(usb3, usb3_ep->num); | |
1021 | } | |
1022 | out: | |
1023 | spin_unlock_irqrestore(&usb3->lock, flags); | |
1024 | } | |
1025 | ||
1026 | static int renesas_usb3_ep_queue(struct usb_ep *_ep, struct usb_request *_req, | |
1027 | gfp_t gfp_flags) | |
1028 | { | |
1029 | struct renesas_usb3_ep *usb3_ep = usb_ep_to_usb3_ep(_ep); | |
1030 | struct renesas_usb3_request *usb3_req = usb_req_to_usb3_req(_req); | |
1031 | struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep); | |
1032 | unsigned long flags; | |
1033 | ||
1034 | dev_dbg(usb3_to_dev(usb3), "ep_queue: ep%2d, %u\n", usb3_ep->num, | |
1035 | _req->length); | |
1036 | ||
1037 | _req->status = -EINPROGRESS; | |
1038 | _req->actual = 0; | |
1039 | spin_lock_irqsave(&usb3->lock, flags); | |
1040 | list_add_tail(&usb3_req->queue, &usb3_ep->queue); | |
1041 | spin_unlock_irqrestore(&usb3->lock, flags); | |
1042 | ||
1043 | if (!usb3_ep->num) | |
1044 | usb3_start_pipe0(usb3_ep, usb3_req); | |
1045 | else | |
1046 | usb3_start_pipen(usb3_ep, usb3_req); | |
1047 | ||
1048 | return 0; | |
1049 | } | |
1050 | ||
1051 | static void usb3_set_device_address(struct renesas_usb3 *usb3, u16 addr) | |
1052 | { | |
1053 | /* DEV_ADDR bit field is cleared by WarmReset, HotReset and BusReset */ | |
1054 | usb3_set_bit(usb3, USB_COM_CON_DEV_ADDR(addr), USB3_USB_COM_CON); | |
1055 | } | |
1056 | ||
1057 | static bool usb3_std_req_set_address(struct renesas_usb3 *usb3, | |
1058 | struct usb_ctrlrequest *ctrl) | |
1059 | { | |
1060 | if (ctrl->wValue >= 128) | |
1061 | return true; /* stall */ | |
1062 | ||
1063 | usb3_set_device_address(usb3, ctrl->wValue); | |
1064 | usb3_set_p0_con_for_no_data(usb3); | |
1065 | ||
1066 | return false; | |
1067 | } | |
1068 | ||
1069 | static void usb3_pipe0_internal_xfer(struct renesas_usb3 *usb3, | |
1070 | void *tx_data, size_t len, | |
1071 | void (*complete)(struct usb_ep *ep, | |
1072 | struct usb_request *req)) | |
1073 | { | |
1074 | struct renesas_usb3_ep *usb3_ep = usb3_get_ep(usb3, 0); | |
1075 | ||
1076 | if (tx_data) | |
1077 | memcpy(usb3->ep0_buf, tx_data, | |
1078 | min_t(size_t, len, USB3_EP0_BUF_SIZE)); | |
1079 | ||
1080 | usb3->ep0_req->buf = &usb3->ep0_buf; | |
1081 | usb3->ep0_req->length = len; | |
1082 | usb3->ep0_req->complete = complete; | |
1083 | renesas_usb3_ep_queue(&usb3_ep->ep, usb3->ep0_req, GFP_ATOMIC); | |
1084 | } | |
1085 | ||
1086 | static void usb3_pipe0_get_status_completion(struct usb_ep *ep, | |
1087 | struct usb_request *req) | |
1088 | { | |
1089 | } | |
1090 | ||
1091 | static bool usb3_std_req_get_status(struct renesas_usb3 *usb3, | |
1092 | struct usb_ctrlrequest *ctrl) | |
1093 | { | |
1094 | bool stall = false; | |
1095 | struct renesas_usb3_ep *usb3_ep; | |
1096 | int num; | |
1097 | u16 status = 0; | |
1098 | ||
1099 | switch (ctrl->bRequestType & USB_RECIP_MASK) { | |
1100 | case USB_RECIP_DEVICE: | |
1101 | if (usb3->gadget.is_selfpowered) | |
1102 | status |= 1 << USB_DEVICE_SELF_POWERED; | |
1103 | if (usb3->gadget.speed == USB_SPEED_SUPER) | |
1104 | status |= usb3_feature_get_un_enabled(usb3); | |
1105 | break; | |
1106 | case USB_RECIP_INTERFACE: | |
1107 | break; | |
1108 | case USB_RECIP_ENDPOINT: | |
1109 | num = le16_to_cpu(ctrl->wIndex) & USB_ENDPOINT_NUMBER_MASK; | |
1110 | usb3_ep = usb3_get_ep(usb3, num); | |
1111 | if (usb3_ep->halt) | |
1112 | status |= 1 << USB_ENDPOINT_HALT; | |
1113 | break; | |
1114 | default: | |
1115 | stall = true; | |
1116 | break; | |
1117 | } | |
1118 | ||
1119 | if (!stall) { | |
1120 | status = cpu_to_le16(status); | |
1121 | dev_dbg(usb3_to_dev(usb3), "get_status: req = %p\n", | |
1122 | usb_req_to_usb3_req(usb3->ep0_req)); | |
1123 | usb3_pipe0_internal_xfer(usb3, &status, sizeof(status), | |
1124 | usb3_pipe0_get_status_completion); | |
1125 | } | |
1126 | ||
1127 | return stall; | |
1128 | } | |
1129 | ||
1130 | static bool usb3_std_req_feature_device(struct renesas_usb3 *usb3, | |
1131 | struct usb_ctrlrequest *ctrl, bool set) | |
1132 | { | |
1133 | bool stall = true; | |
1134 | u16 w_value = le16_to_cpu(ctrl->wValue); | |
1135 | ||
1136 | switch (w_value) { | |
1137 | case USB_DEVICE_TEST_MODE: | |
1138 | if (!set) | |
1139 | break; | |
1140 | usb3->test_mode = le16_to_cpu(ctrl->wIndex) >> 8; | |
1141 | stall = false; | |
1142 | break; | |
1143 | case USB_DEVICE_U1_ENABLE: | |
1144 | case USB_DEVICE_U2_ENABLE: | |
1145 | if (usb3->gadget.speed != USB_SPEED_SUPER) | |
1146 | break; | |
1147 | if (w_value == USB_DEVICE_U1_ENABLE) | |
1148 | usb3_feature_u1_enable(usb3, set); | |
1149 | if (w_value == USB_DEVICE_U2_ENABLE) | |
1150 | usb3_feature_u2_enable(usb3, set); | |
1151 | stall = false; | |
1152 | break; | |
1153 | default: | |
1154 | break; | |
1155 | } | |
1156 | ||
1157 | return stall; | |
1158 | } | |
1159 | ||
1160 | static int usb3_set_halt_p0(struct renesas_usb3_ep *usb3_ep, bool halt) | |
1161 | { | |
1162 | struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep); | |
1163 | ||
1164 | if (unlikely(usb3_ep->num)) | |
1165 | return -EINVAL; | |
1166 | ||
1167 | usb3_ep->halt = halt; | |
1168 | if (halt) | |
1169 | usb3_set_p0_con_stall(usb3); | |
1170 | else | |
1171 | usb3_set_p0_con_stop(usb3); | |
1172 | ||
1173 | return 0; | |
1174 | } | |
1175 | ||
1176 | static int usb3_set_halt_pn(struct renesas_usb3_ep *usb3_ep, bool halt, | |
1177 | bool is_clear_feature) | |
1178 | { | |
1179 | struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep); | |
1180 | unsigned long flags; | |
1181 | ||
1182 | spin_lock_irqsave(&usb3->lock, flags); | |
1183 | if (!usb3_pn_change(usb3, usb3_ep->num)) { | |
1184 | usb3_ep->halt = halt; | |
1185 | if (halt) { | |
1186 | usb3_pn_stall(usb3); | |
1187 | } else if (!is_clear_feature || !usb3_ep->wedge) { | |
1188 | usb3_pn_con_clear(usb3); | |
1189 | usb3_set_bit(usb3, PN_CON_EN, USB3_PN_CON); | |
1190 | usb3_pn_stop(usb3); | |
1191 | } | |
1192 | } | |
1193 | spin_unlock_irqrestore(&usb3->lock, flags); | |
1194 | ||
1195 | return 0; | |
1196 | } | |
1197 | ||
1198 | static int usb3_set_halt(struct renesas_usb3_ep *usb3_ep, bool halt, | |
1199 | bool is_clear_feature) | |
1200 | { | |
1201 | int ret = 0; | |
1202 | ||
1203 | if (halt && usb3_ep->started) | |
1204 | return -EAGAIN; | |
1205 | ||
1206 | if (usb3_ep->num) | |
1207 | ret = usb3_set_halt_pn(usb3_ep, halt, is_clear_feature); | |
1208 | else | |
1209 | ret = usb3_set_halt_p0(usb3_ep, halt); | |
1210 | ||
1211 | return ret; | |
1212 | } | |
1213 | ||
1214 | static bool usb3_std_req_feature_endpoint(struct renesas_usb3 *usb3, | |
1215 | struct usb_ctrlrequest *ctrl, | |
1216 | bool set) | |
1217 | { | |
1218 | int num = le16_to_cpu(ctrl->wIndex) & USB_ENDPOINT_NUMBER_MASK; | |
1219 | struct renesas_usb3_ep *usb3_ep; | |
1220 | struct renesas_usb3_request *usb3_req; | |
1221 | ||
1222 | if (le16_to_cpu(ctrl->wValue) != USB_ENDPOINT_HALT) | |
1223 | return true; /* stall */ | |
1224 | ||
1225 | usb3_ep = usb3_get_ep(usb3, num); | |
1226 | usb3_set_halt(usb3_ep, set, true); | |
1227 | ||
1228 | /* Restarts a queue if clear feature */ | |
1229 | if (!set) { | |
1230 | usb3_ep->started = false; | |
1231 | usb3_req = usb3_get_request(usb3_ep); | |
1232 | if (usb3_req) | |
1233 | usb3_start_pipen(usb3_ep, usb3_req); | |
1234 | } | |
1235 | ||
1236 | return false; | |
1237 | } | |
1238 | ||
1239 | static bool usb3_std_req_feature(struct renesas_usb3 *usb3, | |
1240 | struct usb_ctrlrequest *ctrl, bool set) | |
1241 | { | |
1242 | bool stall = false; | |
1243 | ||
1244 | switch (ctrl->bRequestType & USB_RECIP_MASK) { | |
1245 | case USB_RECIP_DEVICE: | |
1246 | stall = usb3_std_req_feature_device(usb3, ctrl, set); | |
1247 | break; | |
1248 | case USB_RECIP_INTERFACE: | |
1249 | break; | |
1250 | case USB_RECIP_ENDPOINT: | |
1251 | stall = usb3_std_req_feature_endpoint(usb3, ctrl, set); | |
1252 | break; | |
1253 | default: | |
1254 | stall = true; | |
1255 | break; | |
1256 | } | |
1257 | ||
1258 | if (!stall) | |
1259 | usb3_set_p0_con_for_no_data(usb3); | |
1260 | ||
1261 | return stall; | |
1262 | } | |
1263 | ||
1264 | static void usb3_pipe0_set_sel_completion(struct usb_ep *ep, | |
1265 | struct usb_request *req) | |
1266 | { | |
1267 | /* TODO */ | |
1268 | } | |
1269 | ||
1270 | static bool usb3_std_req_set_sel(struct renesas_usb3 *usb3, | |
1271 | struct usb_ctrlrequest *ctrl) | |
1272 | { | |
1273 | u16 w_length = le16_to_cpu(ctrl->wLength); | |
1274 | ||
1275 | if (w_length != 6) | |
1276 | return true; /* stall */ | |
1277 | ||
1278 | dev_dbg(usb3_to_dev(usb3), "set_sel: req = %p\n", | |
1279 | usb_req_to_usb3_req(usb3->ep0_req)); | |
1280 | usb3_pipe0_internal_xfer(usb3, NULL, 6, usb3_pipe0_set_sel_completion); | |
1281 | ||
1282 | return false; | |
1283 | } | |
1284 | ||
1285 | static bool usb3_std_req_set_configuration(struct renesas_usb3 *usb3, | |
1286 | struct usb_ctrlrequest *ctrl) | |
1287 | { | |
1288 | if (ctrl->wValue > 0) | |
1289 | usb3_set_bit(usb3, USB_COM_CON_CONF, USB3_USB_COM_CON); | |
1290 | else | |
1291 | usb3_clear_bit(usb3, USB_COM_CON_CONF, USB3_USB_COM_CON); | |
1292 | ||
1293 | return false; | |
1294 | } | |
1295 | ||
1296 | /** | |
1297 | * usb3_handle_standard_request - handle some standard requests | |
1298 | * @usb3: the renesas_usb3 pointer | |
1299 | * @ctrl: a pointer of setup data | |
1300 | * | |
1301 | * Returns true if this function handled a standard request | |
1302 | */ | |
1303 | static bool usb3_handle_standard_request(struct renesas_usb3 *usb3, | |
1304 | struct usb_ctrlrequest *ctrl) | |
1305 | { | |
1306 | bool ret = false; | |
1307 | bool stall = false; | |
1308 | ||
1309 | if ((ctrl->bRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD) { | |
1310 | switch (ctrl->bRequest) { | |
1311 | case USB_REQ_SET_ADDRESS: | |
1312 | stall = usb3_std_req_set_address(usb3, ctrl); | |
1313 | ret = true; | |
1314 | break; | |
1315 | case USB_REQ_GET_STATUS: | |
1316 | stall = usb3_std_req_get_status(usb3, ctrl); | |
1317 | ret = true; | |
1318 | break; | |
1319 | case USB_REQ_CLEAR_FEATURE: | |
1320 | stall = usb3_std_req_feature(usb3, ctrl, false); | |
1321 | ret = true; | |
1322 | break; | |
1323 | case USB_REQ_SET_FEATURE: | |
1324 | stall = usb3_std_req_feature(usb3, ctrl, true); | |
1325 | ret = true; | |
1326 | break; | |
1327 | case USB_REQ_SET_SEL: | |
1328 | stall = usb3_std_req_set_sel(usb3, ctrl); | |
1329 | ret = true; | |
1330 | break; | |
1331 | case USB_REQ_SET_ISOCH_DELAY: | |
1332 | /* This hardware doesn't support Isochronous xfer */ | |
1333 | stall = true; | |
1334 | ret = true; | |
1335 | break; | |
1336 | case USB_REQ_SET_CONFIGURATION: | |
1337 | usb3_std_req_set_configuration(usb3, ctrl); | |
1338 | break; | |
1339 | default: | |
1340 | break; | |
1341 | } | |
1342 | } | |
1343 | ||
1344 | if (stall) | |
1345 | usb3_set_p0_con_stall(usb3); | |
1346 | ||
1347 | return ret; | |
1348 | } | |
1349 | ||
1350 | static int usb3_p0_con_clear_buffer(struct renesas_usb3 *usb3) | |
1351 | { | |
1352 | usb3_set_bit(usb3, P0_CON_BCLR, USB3_P0_CON); | |
1353 | ||
1354 | return usb3_wait(usb3, USB3_P0_CON, P0_CON_BCLR, 0); | |
1355 | } | |
1356 | ||
1357 | static void usb3_irq_epc_pipe0_setup(struct renesas_usb3 *usb3) | |
1358 | { | |
1359 | struct usb_ctrlrequest ctrl; | |
1360 | struct renesas_usb3_ep *usb3_ep = usb3_get_ep(usb3, 0); | |
1361 | ||
1362 | /* Call giveback function if previous transfer is not completed */ | |
1363 | if (usb3_ep->started) | |
1364 | usb3_request_done(usb3_ep, usb3_get_request(usb3_ep), | |
1365 | -ECONNRESET); | |
1366 | ||
1367 | usb3_p0_con_clear_buffer(usb3); | |
1368 | usb3_get_setup_data(usb3, &ctrl); | |
1369 | if (!usb3_handle_standard_request(usb3, &ctrl)) | |
1370 | if (usb3->driver->setup(&usb3->gadget, &ctrl) < 0) | |
1371 | usb3_set_p0_con_stall(usb3); | |
1372 | } | |
1373 | ||
1374 | static void usb3_irq_epc_pipe0_bfrdy(struct renesas_usb3 *usb3) | |
1375 | { | |
1376 | struct renesas_usb3_ep *usb3_ep = usb3_get_ep(usb3, 0); | |
1377 | struct renesas_usb3_request *usb3_req = usb3_get_request(usb3_ep); | |
1378 | ||
1379 | if (!usb3_req) | |
1380 | return; | |
1381 | ||
1382 | usb3_p0_xfer(usb3_ep, usb3_req); | |
1383 | } | |
1384 | ||
1385 | static void usb3_irq_epc_pipe0(struct renesas_usb3 *usb3) | |
1386 | { | |
1387 | u32 p0_int_sta = usb3_read(usb3, USB3_P0_INT_STA); | |
1388 | ||
1389 | p0_int_sta &= usb3_read(usb3, USB3_P0_INT_ENA); | |
1390 | usb3_write(usb3, p0_int_sta, USB3_P0_INT_STA); | |
1391 | if (p0_int_sta & P0_INT_STSED) | |
1392 | usb3_irq_epc_pipe0_status_end(usb3); | |
1393 | if (p0_int_sta & P0_INT_SETUP) | |
1394 | usb3_irq_epc_pipe0_setup(usb3); | |
1395 | if (p0_int_sta & P0_INT_BFRDY) | |
1396 | usb3_irq_epc_pipe0_bfrdy(usb3); | |
1397 | } | |
1398 | ||
1399 | static void usb3_request_done_pipen(struct renesas_usb3 *usb3, | |
1400 | struct renesas_usb3_ep *usb3_ep, | |
1401 | struct renesas_usb3_request *usb3_req, | |
1402 | int status) | |
1403 | { | |
1404 | usb3_pn_stop(usb3); | |
1405 | usb3_disable_pipe_irq(usb3, usb3_ep->num); | |
1406 | usb3_request_done(usb3_ep, usb3_req, status); | |
1407 | ||
1408 | /* get next usb3_req */ | |
1409 | usb3_req = usb3_get_request(usb3_ep); | |
1410 | if (usb3_req) | |
1411 | usb3_start_pipen(usb3_ep, usb3_req); | |
1412 | } | |
1413 | ||
1414 | static void usb3_irq_epc_pipen_lsttr(struct renesas_usb3 *usb3, int num) | |
1415 | { | |
1416 | struct renesas_usb3_ep *usb3_ep = usb3_get_ep(usb3, num); | |
1417 | struct renesas_usb3_request *usb3_req = usb3_get_request(usb3_ep); | |
1418 | ||
1419 | if (!usb3_req) | |
1420 | return; | |
1421 | ||
1422 | if (usb3_ep->dir_in) { | |
1423 | dev_dbg(usb3_to_dev(usb3), "%s: len = %u, actual = %u\n", | |
1424 | __func__, usb3_req->req.length, usb3_req->req.actual); | |
1425 | usb3_request_done_pipen(usb3, usb3_ep, usb3_req, 0); | |
1426 | } | |
1427 | } | |
1428 | ||
1429 | static void usb3_irq_epc_pipen_bfrdy(struct renesas_usb3 *usb3, int num) | |
1430 | { | |
1431 | struct renesas_usb3_ep *usb3_ep = usb3_get_ep(usb3, num); | |
1432 | struct renesas_usb3_request *usb3_req = usb3_get_request(usb3_ep); | |
1433 | ||
1434 | if (!usb3_req) | |
1435 | return; | |
1436 | ||
1437 | if (usb3_ep->dir_in) { | |
1438 | /* Do not stop the IN pipe here to detect LSTTR interrupt */ | |
1439 | if (!usb3_write_pipe(usb3_ep, usb3_req, USB3_PN_WRITE)) | |
1440 | usb3_clear_bit(usb3, PN_INT_BFRDY, USB3_PN_INT_ENA); | |
1441 | } else { | |
1442 | if (!usb3_read_pipe(usb3_ep, usb3_req, USB3_PN_READ)) | |
1443 | usb3_request_done_pipen(usb3, usb3_ep, usb3_req, 0); | |
1444 | } | |
1445 | } | |
1446 | ||
1447 | static void usb3_irq_epc_pipen(struct renesas_usb3 *usb3, int num) | |
1448 | { | |
1449 | u32 pn_int_sta; | |
1450 | ||
1451 | if (usb3_pn_change(usb3, num) < 0) | |
1452 | return; | |
1453 | ||
1454 | pn_int_sta = usb3_read(usb3, USB3_PN_INT_STA); | |
1455 | pn_int_sta &= usb3_read(usb3, USB3_PN_INT_ENA); | |
1456 | usb3_write(usb3, pn_int_sta, USB3_PN_INT_STA); | |
1457 | if (pn_int_sta & PN_INT_LSTTR) | |
1458 | usb3_irq_epc_pipen_lsttr(usb3, num); | |
1459 | if (pn_int_sta & PN_INT_BFRDY) | |
1460 | usb3_irq_epc_pipen_bfrdy(usb3, num); | |
1461 | } | |
1462 | ||
1463 | static void usb3_irq_epc_int_2(struct renesas_usb3 *usb3, u32 int_sta_2) | |
1464 | { | |
1465 | int i; | |
1466 | ||
1467 | for (i = 0; i < usb3->num_usb3_eps; i++) { | |
1468 | if (int_sta_2 & USB_INT_2_PIPE(i)) { | |
1469 | if (!i) | |
1470 | usb3_irq_epc_pipe0(usb3); | |
1471 | else | |
1472 | usb3_irq_epc_pipen(usb3, i); | |
1473 | } | |
1474 | } | |
1475 | } | |
1476 | ||
1477 | static void usb3_irq_epc(struct renesas_usb3 *usb3) | |
1478 | { | |
1479 | u32 int_sta_1 = usb3_read(usb3, USB3_USB_INT_STA_1); | |
1480 | u32 int_sta_2 = usb3_read(usb3, USB3_USB_INT_STA_2); | |
1481 | ||
1482 | int_sta_1 &= usb3_read(usb3, USB3_USB_INT_ENA_1); | |
1483 | if (int_sta_1) { | |
1484 | usb3_write(usb3, int_sta_1, USB3_USB_INT_STA_1); | |
1485 | usb3_irq_epc_int_1(usb3, int_sta_1); | |
1486 | } | |
1487 | ||
1488 | int_sta_2 &= usb3_read(usb3, USB3_USB_INT_ENA_2); | |
1489 | if (int_sta_2) | |
1490 | usb3_irq_epc_int_2(usb3, int_sta_2); | |
1491 | } | |
1492 | ||
1493 | static irqreturn_t renesas_usb3_irq(int irq, void *_usb3) | |
1494 | { | |
1495 | struct renesas_usb3 *usb3 = _usb3; | |
1496 | irqreturn_t ret = IRQ_NONE; | |
1497 | u32 axi_int_sta = usb3_read(usb3, USB3_AXI_INT_STA); | |
1498 | ||
1499 | if (axi_int_sta & AXI_INT_EPCINT) { | |
1500 | usb3_irq_epc(usb3); | |
1501 | ret = IRQ_HANDLED; | |
1502 | } | |
1503 | ||
1504 | return ret; | |
1505 | } | |
1506 | ||
1507 | static void usb3_write_pn_mod(struct renesas_usb3_ep *usb3_ep, | |
1508 | const struct usb_endpoint_descriptor *desc) | |
1509 | { | |
1510 | struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep); | |
1511 | u32 val = 0; | |
1512 | ||
1513 | val |= usb3_ep->dir_in ? PN_MOD_DIR : 0; | |
1514 | val |= PN_MOD_TYPE(usb_endpoint_type(desc)); | |
1515 | val |= PN_MOD_EPNUM(usb_endpoint_num(desc)); | |
1516 | usb3_write(usb3, val, USB3_PN_MOD); | |
1517 | } | |
1518 | ||
1519 | static u32 usb3_calc_ramarea(int ram_size) | |
1520 | { | |
1521 | WARN_ON(ram_size > SZ_16K); | |
1522 | ||
1523 | if (ram_size <= SZ_1K) | |
1524 | return PN_RAMMAP_RAMAREA_1KB; | |
1525 | else if (ram_size <= SZ_2K) | |
1526 | return PN_RAMMAP_RAMAREA_2KB; | |
1527 | else if (ram_size <= SZ_4K) | |
1528 | return PN_RAMMAP_RAMAREA_4KB; | |
1529 | else if (ram_size <= SZ_8K) | |
1530 | return PN_RAMMAP_RAMAREA_8KB; | |
1531 | else | |
1532 | return PN_RAMMAP_RAMAREA_16KB; | |
1533 | } | |
1534 | ||
1535 | static u32 usb3_calc_rammap_val(struct renesas_usb3_ep *usb3_ep, | |
1536 | const struct usb_endpoint_descriptor *desc) | |
1537 | { | |
1538 | return usb3_ep->rammap_val | PN_RAMMAP_MPKT(usb_endpoint_maxp(desc)); | |
1539 | } | |
1540 | ||
1541 | static int usb3_enable_pipe_n(struct renesas_usb3_ep *usb3_ep, | |
1542 | const struct usb_endpoint_descriptor *desc) | |
1543 | { | |
1544 | struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep); | |
1545 | unsigned long flags; | |
1546 | ||
1547 | usb3_ep->dir_in = usb_endpoint_dir_in(desc); | |
1548 | ||
1549 | spin_lock_irqsave(&usb3->lock, flags); | |
1550 | if (!usb3_pn_change(usb3, usb3_ep->num)) { | |
1551 | usb3_write_pn_mod(usb3_ep, desc); | |
1552 | usb3_write(usb3, usb3_calc_rammap_val(usb3_ep, desc), | |
1553 | USB3_PN_RAMMAP); | |
1554 | usb3_pn_con_clear(usb3); | |
1555 | usb3_set_bit(usb3, PN_CON_EN, USB3_PN_CON); | |
1556 | } | |
1557 | spin_unlock_irqrestore(&usb3->lock, flags); | |
1558 | ||
1559 | return 0; | |
1560 | } | |
1561 | ||
1562 | static int usb3_disable_pipe_n(struct renesas_usb3_ep *usb3_ep) | |
1563 | { | |
1564 | struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep); | |
1565 | unsigned long flags; | |
1566 | ||
1567 | usb3_ep->halt = false; | |
1568 | ||
1569 | spin_lock_irqsave(&usb3->lock, flags); | |
1570 | if (!usb3_pn_change(usb3, usb3_ep->num)) { | |
1571 | usb3_write(usb3, 0, USB3_PN_RAMMAP); | |
1572 | usb3_clear_bit(usb3, PN_CON_EN, USB3_PN_CON); | |
1573 | } | |
1574 | spin_unlock_irqrestore(&usb3->lock, flags); | |
1575 | ||
1576 | return 0; | |
1577 | } | |
1578 | ||
1579 | /*------- usb_ep_ops -----------------------------------------------------*/ | |
1580 | static int renesas_usb3_ep_enable(struct usb_ep *_ep, | |
1581 | const struct usb_endpoint_descriptor *desc) | |
1582 | { | |
1583 | struct renesas_usb3_ep *usb3_ep = usb_ep_to_usb3_ep(_ep); | |
1584 | ||
1585 | return usb3_enable_pipe_n(usb3_ep, desc); | |
1586 | } | |
1587 | ||
1588 | static int renesas_usb3_ep_disable(struct usb_ep *_ep) | |
1589 | { | |
1590 | struct renesas_usb3_ep *usb3_ep = usb_ep_to_usb3_ep(_ep); | |
1591 | struct renesas_usb3_request *usb3_req; | |
1592 | ||
1593 | do { | |
1594 | usb3_req = usb3_get_request(usb3_ep); | |
1595 | if (!usb3_req) | |
1596 | break; | |
1597 | usb3_request_done(usb3_ep, usb3_req, -ESHUTDOWN); | |
1598 | } while (1); | |
1599 | ||
1600 | return usb3_disable_pipe_n(usb3_ep); | |
1601 | } | |
1602 | ||
1603 | static struct usb_request *__renesas_usb3_ep_alloc_request(gfp_t gfp_flags) | |
1604 | { | |
1605 | struct renesas_usb3_request *usb3_req; | |
1606 | ||
1607 | usb3_req = kzalloc(sizeof(struct renesas_usb3_request), gfp_flags); | |
1608 | if (!usb3_req) | |
1609 | return NULL; | |
1610 | ||
1611 | INIT_LIST_HEAD(&usb3_req->queue); | |
1612 | ||
1613 | return &usb3_req->req; | |
1614 | } | |
1615 | ||
1616 | static void __renesas_usb3_ep_free_request(struct usb_request *_req) | |
1617 | { | |
1618 | struct renesas_usb3_request *usb3_req = usb_req_to_usb3_req(_req); | |
1619 | ||
1620 | kfree(usb3_req); | |
1621 | } | |
1622 | ||
1623 | static struct usb_request *renesas_usb3_ep_alloc_request(struct usb_ep *_ep, | |
1624 | gfp_t gfp_flags) | |
1625 | { | |
1626 | return __renesas_usb3_ep_alloc_request(gfp_flags); | |
1627 | } | |
1628 | ||
1629 | static void renesas_usb3_ep_free_request(struct usb_ep *_ep, | |
1630 | struct usb_request *_req) | |
1631 | { | |
1632 | __renesas_usb3_ep_free_request(_req); | |
1633 | } | |
1634 | ||
1635 | static int renesas_usb3_ep_dequeue(struct usb_ep *_ep, struct usb_request *_req) | |
1636 | { | |
1637 | struct renesas_usb3_ep *usb3_ep = usb_ep_to_usb3_ep(_ep); | |
1638 | struct renesas_usb3_request *usb3_req = usb_req_to_usb3_req(_req); | |
1639 | struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep); | |
1640 | ||
1641 | dev_dbg(usb3_to_dev(usb3), "ep_dequeue: ep%2d, %u\n", usb3_ep->num, | |
1642 | _req->length); | |
1643 | ||
1644 | usb3_request_done_pipen(usb3, usb3_ep, usb3_req, -ECONNRESET); | |
1645 | ||
1646 | return 0; | |
1647 | } | |
1648 | ||
1649 | static int renesas_usb3_ep_set_halt(struct usb_ep *_ep, int value) | |
1650 | { | |
1651 | return usb3_set_halt(usb_ep_to_usb3_ep(_ep), !!value, false); | |
1652 | } | |
1653 | ||
1654 | static int renesas_usb3_ep_set_wedge(struct usb_ep *_ep) | |
1655 | { | |
1656 | struct renesas_usb3_ep *usb3_ep = usb_ep_to_usb3_ep(_ep); | |
1657 | ||
1658 | usb3_ep->wedge = true; | |
1659 | return usb3_set_halt(usb3_ep, true, false); | |
1660 | } | |
1661 | ||
1662 | static void renesas_usb3_ep_fifo_flush(struct usb_ep *_ep) | |
1663 | { | |
1664 | struct renesas_usb3_ep *usb3_ep = usb_ep_to_usb3_ep(_ep); | |
1665 | struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep); | |
1666 | unsigned long flags; | |
1667 | ||
1668 | if (usb3_ep->num) { | |
1669 | spin_lock_irqsave(&usb3->lock, flags); | |
1670 | if (!usb3_pn_change(usb3, usb3_ep->num)) { | |
1671 | usb3_pn_con_clear(usb3); | |
1672 | usb3_set_bit(usb3, PN_CON_EN, USB3_PN_CON); | |
1673 | } | |
1674 | spin_unlock_irqrestore(&usb3->lock, flags); | |
1675 | } else { | |
1676 | usb3_p0_con_clear_buffer(usb3); | |
1677 | } | |
1678 | } | |
1679 | ||
1680 | static struct usb_ep_ops renesas_usb3_ep_ops = { | |
1681 | .enable = renesas_usb3_ep_enable, | |
1682 | .disable = renesas_usb3_ep_disable, | |
1683 | ||
1684 | .alloc_request = renesas_usb3_ep_alloc_request, | |
1685 | .free_request = renesas_usb3_ep_free_request, | |
1686 | ||
1687 | .queue = renesas_usb3_ep_queue, | |
1688 | .dequeue = renesas_usb3_ep_dequeue, | |
1689 | ||
1690 | .set_halt = renesas_usb3_ep_set_halt, | |
1691 | .set_wedge = renesas_usb3_ep_set_wedge, | |
1692 | .fifo_flush = renesas_usb3_ep_fifo_flush, | |
1693 | }; | |
1694 | ||
1695 | /*------- usb_gadget_ops -------------------------------------------------*/ | |
1696 | static int renesas_usb3_start(struct usb_gadget *gadget, | |
1697 | struct usb_gadget_driver *driver) | |
1698 | { | |
1699 | struct renesas_usb3 *usb3; | |
1700 | ||
1701 | if (!driver || driver->max_speed < USB_SPEED_FULL || | |
1702 | !driver->setup) | |
1703 | return -EINVAL; | |
1704 | ||
1705 | usb3 = gadget_to_renesas_usb3(gadget); | |
1706 | ||
1707 | /* hook up the driver */ | |
1708 | usb3->driver = driver; | |
1709 | ||
1710 | renesas_usb3_init_controller(usb3); | |
1711 | ||
1712 | return 0; | |
1713 | } | |
1714 | ||
1715 | static int renesas_usb3_stop(struct usb_gadget *gadget) | |
1716 | { | |
1717 | struct renesas_usb3 *usb3 = gadget_to_renesas_usb3(gadget); | |
1718 | unsigned long flags; | |
1719 | ||
1720 | spin_lock_irqsave(&usb3->lock, flags); | |
1721 | usb3->softconnect = false; | |
1722 | usb3->gadget.speed = USB_SPEED_UNKNOWN; | |
1723 | usb3->driver = NULL; | |
1724 | renesas_usb3_stop_controller(usb3); | |
1725 | spin_unlock_irqrestore(&usb3->lock, flags); | |
1726 | ||
1727 | return 0; | |
1728 | } | |
1729 | ||
1730 | static int renesas_usb3_get_frame(struct usb_gadget *_gadget) | |
1731 | { | |
1732 | return -EOPNOTSUPP; | |
1733 | } | |
1734 | ||
1735 | static int renesas_usb3_pullup(struct usb_gadget *gadget, int is_on) | |
1736 | { | |
1737 | struct renesas_usb3 *usb3 = gadget_to_renesas_usb3(gadget); | |
1738 | ||
1739 | usb3->softconnect = !!is_on; | |
1740 | ||
1741 | return 0; | |
1742 | } | |
1743 | ||
1744 | static int renesas_usb3_set_selfpowered(struct usb_gadget *gadget, int is_self) | |
1745 | { | |
1746 | gadget->is_selfpowered = !!is_self; | |
1747 | ||
1748 | return 0; | |
1749 | } | |
1750 | ||
1751 | static const struct usb_gadget_ops renesas_usb3_gadget_ops = { | |
1752 | .get_frame = renesas_usb3_get_frame, | |
1753 | .udc_start = renesas_usb3_start, | |
1754 | .udc_stop = renesas_usb3_stop, | |
1755 | .pullup = renesas_usb3_pullup, | |
1756 | .set_selfpowered = renesas_usb3_set_selfpowered, | |
1757 | }; | |
1758 | ||
1759 | /*------- platform_driver ------------------------------------------------*/ | |
1760 | static int renesas_usb3_remove(struct platform_device *pdev) | |
1761 | { | |
1762 | struct renesas_usb3 *usb3 = platform_get_drvdata(pdev); | |
1763 | ||
1764 | pm_runtime_put(&pdev->dev); | |
1765 | pm_runtime_disable(&pdev->dev); | |
1766 | ||
1767 | usb_del_gadget_udc(&usb3->gadget); | |
1768 | ||
1769 | __renesas_usb3_ep_free_request(usb3->ep0_req); | |
1770 | ||
1771 | return 0; | |
1772 | } | |
1773 | ||
1774 | static int renesas_usb3_init_ep(struct renesas_usb3 *usb3, struct device *dev, | |
1775 | const struct renesas_usb3_priv *priv) | |
1776 | { | |
1777 | struct renesas_usb3_ep *usb3_ep; | |
1778 | int i; | |
1779 | ||
1780 | /* calculate num_usb3_eps from renesas_usb3_priv */ | |
1781 | usb3->num_usb3_eps = priv->ramsize_per_ramif * priv->num_ramif * 2 / | |
1782 | priv->ramsize_per_pipe + 1; | |
1783 | ||
1784 | if (usb3->num_usb3_eps > USB3_MAX_NUM_PIPES) | |
1785 | usb3->num_usb3_eps = USB3_MAX_NUM_PIPES; | |
1786 | ||
1787 | usb3->usb3_ep = devm_kzalloc(dev, sizeof(*usb3_ep) * usb3->num_usb3_eps, | |
1788 | GFP_KERNEL); | |
1789 | if (!usb3->usb3_ep) | |
1790 | return -ENOMEM; | |
1791 | ||
1792 | dev_dbg(dev, "%s: num_usb3_eps = %d\n", __func__, usb3->num_usb3_eps); | |
1793 | /* | |
1794 | * This driver prepares pipes as the followings: | |
1795 | * - odd pipes = IN pipe | |
1796 | * - even pipes = OUT pipe (except pipe 0) | |
1797 | */ | |
1798 | usb3_for_each_ep(usb3_ep, usb3, i) { | |
1799 | snprintf(usb3_ep->ep_name, sizeof(usb3_ep->ep_name), "ep%d", i); | |
1800 | usb3_ep->usb3 = usb3; | |
1801 | usb3_ep->num = i; | |
1802 | usb3_ep->ep.name = usb3_ep->ep_name; | |
1803 | usb3_ep->ep.ops = &renesas_usb3_ep_ops; | |
1804 | INIT_LIST_HEAD(&usb3_ep->queue); | |
1805 | INIT_LIST_HEAD(&usb3_ep->ep.ep_list); | |
1806 | if (!i) { | |
1807 | /* for control pipe */ | |
1808 | usb3->gadget.ep0 = &usb3_ep->ep; | |
1809 | usb_ep_set_maxpacket_limit(&usb3_ep->ep, | |
1810 | USB3_EP0_HSFS_MAX_PACKET_SIZE); | |
1811 | usb3_ep->ep.caps.type_control = true; | |
1812 | usb3_ep->ep.caps.dir_in = true; | |
1813 | usb3_ep->ep.caps.dir_out = true; | |
1814 | continue; | |
1815 | } | |
1816 | ||
1817 | /* for bulk or interrupt pipe */ | |
1818 | usb_ep_set_maxpacket_limit(&usb3_ep->ep, ~0); | |
1819 | list_add_tail(&usb3_ep->ep.ep_list, &usb3->gadget.ep_list); | |
1820 | usb3_ep->ep.caps.type_bulk = true; | |
1821 | usb3_ep->ep.caps.type_int = true; | |
1822 | if (i & 1) | |
1823 | usb3_ep->ep.caps.dir_in = true; | |
1824 | else | |
1825 | usb3_ep->ep.caps.dir_out = true; | |
1826 | } | |
1827 | ||
1828 | return 0; | |
1829 | } | |
1830 | ||
1831 | static void renesas_usb3_init_ram(struct renesas_usb3 *usb3, struct device *dev, | |
1832 | const struct renesas_usb3_priv *priv) | |
1833 | { | |
1834 | struct renesas_usb3_ep *usb3_ep; | |
1835 | int i; | |
1836 | u32 ramif[2], basead[2]; /* index 0 = for IN pipes */ | |
1837 | u32 *cur_ramif, *cur_basead; | |
1838 | u32 val; | |
1839 | ||
1840 | memset(ramif, 0, sizeof(ramif)); | |
1841 | memset(basead, 0, sizeof(basead)); | |
1842 | ||
1843 | /* | |
1844 | * This driver prepares pipes as the followings: | |
1845 | * - all pipes = the same size as "ramsize_per_pipe" | |
1846 | * Please refer to the "Method of Specifying RAM Mapping" | |
1847 | */ | |
1848 | usb3_for_each_ep(usb3_ep, usb3, i) { | |
1849 | if (!i) | |
1850 | continue; /* out of scope if ep num = 0 */ | |
1851 | if (usb3_ep->ep.caps.dir_in) { | |
1852 | cur_ramif = &ramif[0]; | |
1853 | cur_basead = &basead[0]; | |
1854 | } else { | |
1855 | cur_ramif = &ramif[1]; | |
1856 | cur_basead = &basead[1]; | |
1857 | } | |
1858 | ||
1859 | if (*cur_basead > priv->ramsize_per_ramif) | |
1860 | continue; /* out of memory for IN or OUT pipe */ | |
1861 | ||
1862 | /* calculate rammap_val */ | |
1863 | val = PN_RAMMAP_RAMIF(*cur_ramif); | |
1864 | val |= usb3_calc_ramarea(priv->ramsize_per_pipe); | |
1865 | val |= PN_RAMMAP_BASEAD(*cur_basead); | |
1866 | usb3_ep->rammap_val = val; | |
1867 | ||
1868 | dev_dbg(dev, "ep%2d: val = %08x, ramif = %d, base = %x\n", | |
1869 | i, val, *cur_ramif, *cur_basead); | |
1870 | ||
1871 | /* update current ramif */ | |
1872 | if (*cur_ramif + 1 == priv->num_ramif) { | |
1873 | *cur_ramif = 0; | |
1874 | *cur_basead += priv->ramsize_per_pipe; | |
1875 | } else { | |
1876 | (*cur_ramif)++; | |
1877 | } | |
1878 | } | |
1879 | } | |
1880 | ||
1881 | static const struct renesas_usb3_priv renesas_usb3_priv_r8a7795 = { | |
1882 | .ramsize_per_ramif = SZ_16K, | |
1883 | .num_ramif = 2, | |
1884 | .ramsize_per_pipe = SZ_4K, | |
1885 | .workaround_for_vbus = true, | |
1886 | }; | |
1887 | ||
1888 | static const struct of_device_id usb3_of_match[] = { | |
1889 | { | |
1890 | .compatible = "renesas,r8a7795-usb3-peri", | |
1891 | .data = &renesas_usb3_priv_r8a7795, | |
1892 | }, | |
1893 | { }, | |
1894 | }; | |
1895 | MODULE_DEVICE_TABLE(of, usb3_of_match); | |
1896 | ||
1897 | static int renesas_usb3_probe(struct platform_device *pdev) | |
1898 | { | |
1899 | struct renesas_usb3 *usb3; | |
1900 | struct resource *res; | |
1901 | const struct of_device_id *match; | |
1902 | int irq, ret; | |
1903 | const struct renesas_usb3_priv *priv; | |
1904 | ||
1905 | match = of_match_node(usb3_of_match, pdev->dev.of_node); | |
1906 | if (!match) | |
1907 | return -ENODEV; | |
1908 | priv = match->data; | |
1909 | ||
1910 | irq = platform_get_irq(pdev, 0); | |
1911 | if (irq < 0) | |
1912 | return -ENODEV; | |
1913 | ||
1914 | usb3 = devm_kzalloc(&pdev->dev, sizeof(*usb3), GFP_KERNEL); | |
1915 | if (!usb3) | |
1916 | return -ENOMEM; | |
1917 | ||
1918 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
1919 | usb3->reg = devm_ioremap_resource(&pdev->dev, res); | |
1920 | if (IS_ERR(usb3->reg)) | |
1921 | return PTR_ERR(usb3->reg); | |
1922 | ||
1923 | platform_set_drvdata(pdev, usb3); | |
1924 | spin_lock_init(&usb3->lock); | |
1925 | ||
1926 | usb3->gadget.ops = &renesas_usb3_gadget_ops; | |
1927 | usb3->gadget.name = udc_name; | |
1928 | usb3->gadget.max_speed = USB_SPEED_SUPER; | |
1929 | INIT_LIST_HEAD(&usb3->gadget.ep_list); | |
1930 | ret = renesas_usb3_init_ep(usb3, &pdev->dev, priv); | |
1931 | if (ret < 0) | |
1932 | return ret; | |
1933 | renesas_usb3_init_ram(usb3, &pdev->dev, priv); | |
1934 | ||
1935 | ret = devm_request_irq(&pdev->dev, irq, renesas_usb3_irq, 0, | |
1936 | dev_name(&pdev->dev), usb3); | |
1937 | if (ret < 0) | |
1938 | return ret; | |
1939 | ||
1940 | /* for ep0 handling */ | |
1941 | usb3->ep0_req = __renesas_usb3_ep_alloc_request(GFP_KERNEL); | |
1942 | if (!usb3->ep0_req) | |
1943 | return -ENOMEM; | |
1944 | ||
1945 | ret = usb_add_gadget_udc(&pdev->dev, &usb3->gadget); | |
1946 | if (ret < 0) | |
1947 | goto err_add_udc; | |
1948 | ||
1949 | usb3->workaround_for_vbus = priv->workaround_for_vbus; | |
1950 | ||
1951 | pm_runtime_enable(&pdev->dev); | |
1952 | pm_runtime_get_sync(&pdev->dev); | |
1953 | ||
1954 | dev_info(&pdev->dev, "probed\n"); | |
1955 | ||
1956 | return 0; | |
1957 | ||
1958 | err_add_udc: | |
1959 | __renesas_usb3_ep_free_request(usb3->ep0_req); | |
1960 | ||
1961 | return ret; | |
1962 | } | |
1963 | ||
1964 | static struct platform_driver renesas_usb3_driver = { | |
1965 | .probe = renesas_usb3_probe, | |
1966 | .remove = renesas_usb3_remove, | |
1967 | .driver = { | |
1968 | .name = (char *)udc_name, | |
1969 | .of_match_table = of_match_ptr(usb3_of_match), | |
1970 | }, | |
1971 | }; | |
1972 | module_platform_driver(renesas_usb3_driver); | |
1973 | ||
1974 | MODULE_DESCRIPTION("Renesas USB3.0 Peripheral driver"); | |
1975 | MODULE_LICENSE("GPL v2"); | |
1976 | MODULE_AUTHOR("Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>"); | |
1977 | MODULE_ALIAS("platform:renesas_usb3"); |