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x86/topology: Fix function name in documentation
[cris-mirror.git] / drivers / usb / gadget / udc / renesas_usb3.c
blob6e87af2483679aac59f23e942dde9367a30d35e4
1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * Renesas USB3.0 Peripheral driver (USB gadget)
4 *
5 * Copyright (C) 2015-2017 Renesas Electronics Corporation
6 */
7
8 #include <linux/debugfs.h>
9 #include <linux/delay.h>
10 #include <linux/dma-mapping.h>
11 #include <linux/err.h>
12 #include <linux/extcon-provider.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/phy/phy.h>
18 #include <linux/platform_device.h>
19 #include <linux/pm_runtime.h>
20 #include <linux/sizes.h>
21 #include <linux/slab.h>
22 #include <linux/sys_soc.h>
23 #include <linux/uaccess.h>
24 #include <linux/usb/ch9.h>
25 #include <linux/usb/gadget.h>
26
27 /* register definitions */
28 #define USB3_AXI_INT_STA 0x008
29 #define USB3_AXI_INT_ENA 0x00c
30 #define USB3_DMA_INT_STA 0x010
31 #define USB3_DMA_INT_ENA 0x014
32 #define USB3_DMA_CH0_CON(n) (0x030 + ((n) - 1) * 0x10) /* n = 1 to 4 */
33 #define USB3_DMA_CH0_PRD_ADR(n) (0x034 + ((n) - 1) * 0x10) /* n = 1 to 4 */
34 #define USB3_USB_COM_CON 0x200
35 #define USB3_USB20_CON 0x204
36 #define USB3_USB30_CON 0x208
37 #define USB3_USB_STA 0x210
38 #define USB3_DRD_CON 0x218
39 #define USB3_USB_INT_STA_1 0x220
40 #define USB3_USB_INT_STA_2 0x224
41 #define USB3_USB_INT_ENA_1 0x228
42 #define USB3_USB_INT_ENA_2 0x22c
43 #define USB3_STUP_DAT_0 0x230
44 #define USB3_STUP_DAT_1 0x234
45 #define USB3_USB_OTG_STA 0x268
46 #define USB3_USB_OTG_INT_STA 0x26c
47 #define USB3_USB_OTG_INT_ENA 0x270
48 #define USB3_P0_MOD 0x280
49 #define USB3_P0_CON 0x288
50 #define USB3_P0_STA 0x28c
51 #define USB3_P0_INT_STA 0x290
52 #define USB3_P0_INT_ENA 0x294
53 #define USB3_P0_LNG 0x2a0
54 #define USB3_P0_READ 0x2a4
55 #define USB3_P0_WRITE 0x2a8
56 #define USB3_PIPE_COM 0x2b0
57 #define USB3_PN_MOD 0x2c0
58 #define USB3_PN_RAMMAP 0x2c4
59 #define USB3_PN_CON 0x2c8
60 #define USB3_PN_STA 0x2cc
61 #define USB3_PN_INT_STA 0x2d0
62 #define USB3_PN_INT_ENA 0x2d4
63 #define USB3_PN_LNG 0x2e0
64 #define USB3_PN_READ 0x2e4
65 #define USB3_PN_WRITE 0x2e8
66 #define USB3_SSIFCMD 0x340
67
68 /* AXI_INT_ENA and AXI_INT_STA */
69 #define AXI_INT_DMAINT BIT(31)
70 #define AXI_INT_EPCINT BIT(30)
71 /* PRD's n = from 1 to 4 */
72 #define AXI_INT_PRDEN_CLR_STA_SHIFT(n) (16 + (n) - 1)
73 #define AXI_INT_PRDERR_STA_SHIFT(n) (0 + (n) - 1)
74 #define AXI_INT_PRDEN_CLR_STA(n) (1 << AXI_INT_PRDEN_CLR_STA_SHIFT(n))
75 #define AXI_INT_PRDERR_STA(n) (1 << AXI_INT_PRDERR_STA_SHIFT(n))
76
77 /* DMA_INT_ENA and DMA_INT_STA */
78 #define DMA_INT(n) BIT(n)
79
80 /* DMA_CH0_CONn */
81 #define DMA_CON_PIPE_DIR BIT(15) /* 1: In Transfer */
82 #define DMA_CON_PIPE_NO_SHIFT 8
83 #define DMA_CON_PIPE_NO_MASK GENMASK(12, DMA_CON_PIPE_NO_SHIFT)
84 #define DMA_COM_PIPE_NO(n) (((n) << DMA_CON_PIPE_NO_SHIFT) & \
85 DMA_CON_PIPE_NO_MASK)
86 #define DMA_CON_PRD_EN BIT(0)
87
88 /* LCLKSEL */
89 #define LCLKSEL_LSEL BIT(18)
90
91 /* USB_COM_CON */
92 #define USB_COM_CON_CONF BIT(24)
93 #define USB_COM_CON_PN_WDATAIF_NL BIT(23)
94 #define USB_COM_CON_PN_RDATAIF_NL BIT(22)
95 #define USB_COM_CON_PN_LSTTR_PP BIT(21)
96 #define USB_COM_CON_SPD_MODE BIT(17)
97 #define USB_COM_CON_EP0_EN BIT(16)
98 #define USB_COM_CON_DEV_ADDR_SHIFT 8
99 #define USB_COM_CON_DEV_ADDR_MASK GENMASK(14, USB_COM_CON_DEV_ADDR_SHIFT)
100 #define USB_COM_CON_DEV_ADDR(n) (((n) << USB_COM_CON_DEV_ADDR_SHIFT) & \
101 USB_COM_CON_DEV_ADDR_MASK)
102 #define USB_COM_CON_RX_DETECTION BIT(1)
103 #define USB_COM_CON_PIPE_CLR BIT(0)
104
105 /* USB20_CON */
106 #define USB20_CON_B2_PUE BIT(31)
107 #define USB20_CON_B2_SUSPEND BIT(24)
108 #define USB20_CON_B2_CONNECT BIT(17)
109 #define USB20_CON_B2_TSTMOD_SHIFT 8
110 #define USB20_CON_B2_TSTMOD_MASK GENMASK(10, USB20_CON_B2_TSTMOD_SHIFT)
111 #define USB20_CON_B2_TSTMOD(n) (((n) << USB20_CON_B2_TSTMOD_SHIFT) & \
112 USB20_CON_B2_TSTMOD_MASK)
113 #define USB20_CON_B2_TSTMOD_EN BIT(0)
114
115 /* USB30_CON */
116 #define USB30_CON_POW_SEL_SHIFT 24
117 #define USB30_CON_POW_SEL_MASK GENMASK(26, USB30_CON_POW_SEL_SHIFT)
118 #define USB30_CON_POW_SEL_IN_U3 BIT(26)
119 #define USB30_CON_POW_SEL_IN_DISCON 0
120 #define USB30_CON_POW_SEL_P2_TO_P0 BIT(25)
121 #define USB30_CON_POW_SEL_P0_TO_P3 BIT(24)
122 #define USB30_CON_POW_SEL_P0_TO_P2 0
123 #define USB30_CON_B3_PLLWAKE BIT(23)
124 #define USB30_CON_B3_CONNECT BIT(17)
125 #define USB30_CON_B3_HOTRST_CMP BIT(1)
126
127 /* USB_STA */
128 #define USB_STA_SPEED_MASK (BIT(2) | BIT(1))
129 #define USB_STA_SPEED_HS BIT(2)
130 #define USB_STA_SPEED_FS BIT(1)
131 #define USB_STA_SPEED_SS 0
132 #define USB_STA_VBUS_STA BIT(0)
133
134 /* DRD_CON */
135 #define DRD_CON_PERI_CON BIT(24)
136 #define DRD_CON_VBOUT BIT(0)
137
138 /* USB_INT_ENA_1 and USB_INT_STA_1 */
139 #define USB_INT_1_B3_PLLWKUP BIT(31)
140 #define USB_INT_1_B3_LUPSUCS BIT(30)
141 #define USB_INT_1_B3_DISABLE BIT(27)
142 #define USB_INT_1_B3_WRMRST BIT(21)
143 #define USB_INT_1_B3_HOTRST BIT(20)
144 #define USB_INT_1_B2_USBRST BIT(12)
145 #define USB_INT_1_B2_L1SPND BIT(11)
146 #define USB_INT_1_B2_SPND BIT(9)
147 #define USB_INT_1_B2_RSUM BIT(8)
148 #define USB_INT_1_SPEED BIT(1)
149 #define USB_INT_1_VBUS_CNG BIT(0)
150
151 /* USB_INT_ENA_2 and USB_INT_STA_2 */
152 #define USB_INT_2_PIPE(n) BIT(n)
153
154 /* USB_OTG_STA, USB_OTG_INT_STA and USB_OTG_INT_ENA */
155 #define USB_OTG_IDMON BIT(4)
156
157 /* P0_MOD */
158 #define P0_MOD_DIR BIT(6)
159
160 /* P0_CON and PN_CON */
161 #define PX_CON_BYTE_EN_MASK (BIT(10) | BIT(9))
162 #define PX_CON_BYTE_EN_SHIFT 9
163 #define PX_CON_BYTE_EN_BYTES(n) (((n) << PX_CON_BYTE_EN_SHIFT) & \
164 PX_CON_BYTE_EN_MASK)
165 #define PX_CON_SEND BIT(8)
166
167 /* P0_CON */
168 #define P0_CON_ST_RES_MASK (BIT(27) | BIT(26))
169 #define P0_CON_ST_RES_FORCE_STALL BIT(27)
170 #define P0_CON_ST_RES_NORMAL BIT(26)
171 #define P0_CON_ST_RES_FORCE_NRDY 0
172 #define P0_CON_OT_RES_MASK (BIT(25) | BIT(24))
173 #define P0_CON_OT_RES_FORCE_STALL BIT(25)
174 #define P0_CON_OT_RES_NORMAL BIT(24)
175 #define P0_CON_OT_RES_FORCE_NRDY 0
176 #define P0_CON_IN_RES_MASK (BIT(17) | BIT(16))
177 #define P0_CON_IN_RES_FORCE_STALL BIT(17)
178 #define P0_CON_IN_RES_NORMAL BIT(16)
179 #define P0_CON_IN_RES_FORCE_NRDY 0
180 #define P0_CON_RES_WEN BIT(7)
181 #define P0_CON_BCLR BIT(1)
182
183 /* P0_STA and PN_STA */
184 #define PX_STA_BUFSTS BIT(0)
185
186 /* P0_INT_ENA and P0_INT_STA */
187 #define P0_INT_STSED BIT(18)
188 #define P0_INT_STSST BIT(17)
189 #define P0_INT_SETUP BIT(16)
190 #define P0_INT_RCVNL BIT(8)
191 #define P0_INT_ERDY BIT(7)
192 #define P0_INT_FLOW BIT(6)
193 #define P0_INT_STALL BIT(2)
194 #define P0_INT_NRDY BIT(1)
195 #define P0_INT_BFRDY BIT(0)
196 #define P0_INT_ALL_BITS (P0_INT_STSED | P0_INT_SETUP | P0_INT_BFRDY)
197
198 /* PN_MOD */
199 #define PN_MOD_DIR BIT(6)
200 #define PN_MOD_TYPE_SHIFT 4
201 #define PN_MOD_TYPE_MASK GENMASK(5, PN_MOD_TYPE_SHIFT)
202 #define PN_MOD_TYPE(n) (((n) << PN_MOD_TYPE_SHIFT) & \
203 PN_MOD_TYPE_MASK)
204 #define PN_MOD_EPNUM_MASK GENMASK(3, 0)
205 #define PN_MOD_EPNUM(n) ((n) & PN_MOD_EPNUM_MASK)
206
207 /* PN_RAMMAP */
208 #define PN_RAMMAP_RAMAREA_SHIFT 29
209 #define PN_RAMMAP_RAMAREA_MASK GENMASK(31, PN_RAMMAP_RAMAREA_SHIFT)
210 #define PN_RAMMAP_RAMAREA_16KB BIT(31)
211 #define PN_RAMMAP_RAMAREA_8KB (BIT(30) | BIT(29))
212 #define PN_RAMMAP_RAMAREA_4KB BIT(30)
213 #define PN_RAMMAP_RAMAREA_2KB BIT(29)
214 #define PN_RAMMAP_RAMAREA_1KB 0
215 #define PN_RAMMAP_MPKT_SHIFT 16
216 #define PN_RAMMAP_MPKT_MASK GENMASK(26, PN_RAMMAP_MPKT_SHIFT)
217 #define PN_RAMMAP_MPKT(n) (((n) << PN_RAMMAP_MPKT_SHIFT) & \
218 PN_RAMMAP_MPKT_MASK)
219 #define PN_RAMMAP_RAMIF_SHIFT 14
220 #define PN_RAMMAP_RAMIF_MASK GENMASK(15, PN_RAMMAP_RAMIF_SHIFT)
221 #define PN_RAMMAP_RAMIF(n) (((n) << PN_RAMMAP_RAMIF_SHIFT) & \
222 PN_RAMMAP_RAMIF_MASK)
223 #define PN_RAMMAP_BASEAD_MASK GENMASK(13, 0)
224 #define PN_RAMMAP_BASEAD(offs) (((offs) >> 3) & PN_RAMMAP_BASEAD_MASK)
225 #define PN_RAMMAP_DATA(area, ramif, basead) ((PN_RAMMAP_##area) | \
226 (PN_RAMMAP_RAMIF(ramif)) | \
227 (PN_RAMMAP_BASEAD(basead)))
228
229 /* PN_CON */
230 #define PN_CON_EN BIT(31)
231 #define PN_CON_DATAIF_EN BIT(30)
232 #define PN_CON_RES_MASK (BIT(17) | BIT(16))
233 #define PN_CON_RES_FORCE_STALL BIT(17)
234 #define PN_CON_RES_NORMAL BIT(16)
235 #define PN_CON_RES_FORCE_NRDY 0
236 #define PN_CON_LAST BIT(11)
237 #define PN_CON_RES_WEN BIT(7)
238 #define PN_CON_CLR BIT(0)
239
240 /* PN_INT_STA and PN_INT_ENA */
241 #define PN_INT_LSTTR BIT(4)
242 #define PN_INT_BFRDY BIT(0)
243
244 /* USB3_SSIFCMD */
245 #define SSIFCMD_URES_U2 BIT(9)
246 #define SSIFCMD_URES_U1 BIT(8)
247 #define SSIFCMD_UDIR_U2 BIT(7)
248 #define SSIFCMD_UDIR_U1 BIT(6)
249 #define SSIFCMD_UREQ_U2 BIT(5)
250 #define SSIFCMD_UREQ_U1 BIT(4)
251
252 #define USB3_EP0_SS_MAX_PACKET_SIZE 512
253 #define USB3_EP0_HSFS_MAX_PACKET_SIZE 64
254 #define USB3_EP0_BUF_SIZE 8
255 #define USB3_MAX_NUM_PIPES 6 /* This includes PIPE 0 */
256 #define USB3_WAIT_US 3
257 #define USB3_DMA_NUM_SETTING_AREA 4
258 /*
259 * To avoid double-meaning of "0" (xferred 65536 bytes or received zlp if
260 * buffer size is 65536), this driver uses the maximum size per a entry is
261 * 32768 bytes.
262 */
263 #define USB3_DMA_MAX_XFER_SIZE 32768
264 #define USB3_DMA_PRD_SIZE 4096
265
266 struct renesas_usb3;
267
268 /* Physical Region Descriptor Table */
269 struct renesas_usb3_prd {
270 u32 word1;
271 #define USB3_PRD1_E BIT(30) /* the end of chain */
272 #define USB3_PRD1_U BIT(29) /* completion of transfer */
273 #define USB3_PRD1_D BIT(28) /* Error occurred */
274 #define USB3_PRD1_INT BIT(27) /* Interrupt occurred */
275 #define USB3_PRD1_LST BIT(26) /* Last Packet */
276 #define USB3_PRD1_B_INC BIT(24)
277 #define USB3_PRD1_MPS_8 0
278 #define USB3_PRD1_MPS_16 BIT(21)
279 #define USB3_PRD1_MPS_32 BIT(22)
280 #define USB3_PRD1_MPS_64 (BIT(22) | BIT(21))
281 #define USB3_PRD1_MPS_512 BIT(23)
282 #define USB3_PRD1_MPS_1024 (BIT(23) | BIT(21))
283 #define USB3_PRD1_MPS_RESERVED (BIT(23) | BIT(22) | BIT(21))
284 #define USB3_PRD1_SIZE_MASK GENMASK(15, 0)
285
286 u32 bap;
287 };
288 #define USB3_DMA_NUM_PRD_ENTRIES (USB3_DMA_PRD_SIZE / \
289 sizeof(struct renesas_usb3_prd))
290 #define USB3_DMA_MAX_XFER_SIZE_ALL_PRDS (USB3_DMA_PRD_SIZE / \
291 sizeof(struct renesas_usb3_prd) * \
292 USB3_DMA_MAX_XFER_SIZE)
293
294 struct renesas_usb3_dma {
295 struct renesas_usb3_prd *prd;
296 dma_addr_t prd_dma;
297 int num; /* Setting area number (from 1 to 4) */
298 bool used;
299 };
300
301 struct renesas_usb3_request {
302 struct usb_request req;
303 struct list_head queue;
304 };
305
306 #define USB3_EP_NAME_SIZE 8
307 struct renesas_usb3_ep {
308 struct usb_ep ep;
309 struct renesas_usb3 *usb3;
310 struct renesas_usb3_dma *dma;
311 int num;
312 char ep_name[USB3_EP_NAME_SIZE];
313 struct list_head queue;
314 u32 rammap_val;
315 bool dir_in;
316 bool halt;
317 bool wedge;
318 bool started;
319 };
320
321 struct renesas_usb3_priv {
322 int ramsize_per_ramif; /* unit = bytes */
323 int num_ramif;
324 int ramsize_per_pipe; /* unit = bytes */
325 bool workaround_for_vbus; /* if true, don't check vbus signal */
326 };
327
328 struct renesas_usb3 {
329 void __iomem *reg;
330
331 struct usb_gadget gadget;
332 struct usb_gadget_driver *driver;
333 struct extcon_dev *extcon;
334 struct work_struct extcon_work;
335 struct phy *phy;
336
337 struct renesas_usb3_ep *usb3_ep;
338 int num_usb3_eps;
339
340 struct renesas_usb3_dma dma[USB3_DMA_NUM_SETTING_AREA];
341
342 spinlock_t lock;
343 int disabled_count;
344
345 struct usb_request *ep0_req;
346 u16 test_mode;
347 u8 ep0_buf[USB3_EP0_BUF_SIZE];
348 bool softconnect;
349 bool workaround_for_vbus;
350 bool extcon_host; /* check id and set EXTCON_USB_HOST */
351 bool extcon_usb; /* check vbus and set EXTCON_USB */
352 bool forced_b_device;
353 };
354
355 #define gadget_to_renesas_usb3(_gadget) \
356 container_of(_gadget, struct renesas_usb3, gadget)
357 #define renesas_usb3_to_gadget(renesas_usb3) (&renesas_usb3->gadget)
358 #define usb3_to_dev(_usb3) (_usb3->gadget.dev.parent)
359
360 #define usb_ep_to_usb3_ep(_ep) container_of(_ep, struct renesas_usb3_ep, ep)
361 #define usb3_ep_to_usb3(_usb3_ep) (_usb3_ep->usb3)
362 #define usb_req_to_usb3_req(_req) container_of(_req, \
363 struct renesas_usb3_request, req)
364
365 #define usb3_get_ep(usb3, n) ((usb3)->usb3_ep + (n))
366 #define usb3_for_each_ep(usb3_ep, usb3, i) \
367 for ((i) = 0, usb3_ep = usb3_get_ep(usb3, (i)); \
368 (i) < (usb3)->num_usb3_eps; \
369 (i)++, usb3_ep = usb3_get_ep(usb3, (i)))
370
371 #define usb3_get_dma(usb3, i) (&(usb3)->dma[i])
372 #define usb3_for_each_dma(usb3, dma, i) \
373 for ((i) = 0, dma = usb3_get_dma((usb3), (i)); \
374 (i) < USB3_DMA_NUM_SETTING_AREA; \
375 (i)++, dma = usb3_get_dma((usb3), (i)))
376
377 static const char udc_name[] = "renesas_usb3";
378
379 static bool use_dma = 1;
380 module_param(use_dma, bool, 0644);
381 MODULE_PARM_DESC(use_dma, "use dedicated DMAC");
382
383 static void usb3_write(struct renesas_usb3 *usb3, u32 data, u32 offs)
384 {
385 iowrite32(data, usb3->reg + offs);
386 }
387
388 static u32 usb3_read(struct renesas_usb3 *usb3, u32 offs)
389 {
390 return ioread32(usb3->reg + offs);
391 }
392
393 static void usb3_set_bit(struct renesas_usb3 *usb3, u32 bits, u32 offs)
394 {
395 u32 val = usb3_read(usb3, offs);
396
397 val |= bits;
398 usb3_write(usb3, val, offs);
399 }
400
401 static void usb3_clear_bit(struct renesas_usb3 *usb3, u32 bits, u32 offs)
402 {
403 u32 val = usb3_read(usb3, offs);
404
405 val &= ~bits;
406 usb3_write(usb3, val, offs);
407 }
408
409 static int usb3_wait(struct renesas_usb3 *usb3, u32 reg, u32 mask,
410 u32 expected)
411 {
412 int i;
413
414 for (i = 0; i < USB3_WAIT_US; i++) {
415 if ((usb3_read(usb3, reg) & mask) == expected)
416 return 0;
417 udelay(1);
418 }
419
420 dev_dbg(usb3_to_dev(usb3), "%s: timed out (%8x, %08x, %08x)\n",
421 __func__, reg, mask, expected);
422
423 return -EBUSY;
424 }
425
426 static void renesas_usb3_extcon_work(struct work_struct *work)
427 {
428 struct renesas_usb3 *usb3 = container_of(work, struct renesas_usb3,
429 extcon_work);
430
431 extcon_set_state_sync(usb3->extcon, EXTCON_USB_HOST, usb3->extcon_host);
432 extcon_set_state_sync(usb3->extcon, EXTCON_USB, usb3->extcon_usb);
433 }
434
435 static void usb3_enable_irq_1(struct renesas_usb3 *usb3, u32 bits)
436 {
437 usb3_set_bit(usb3, bits, USB3_USB_INT_ENA_1);
438 }
439
440 static void usb3_disable_irq_1(struct renesas_usb3 *usb3, u32 bits)
441 {
442 usb3_clear_bit(usb3, bits, USB3_USB_INT_ENA_1);
443 }
444
445 static void usb3_enable_pipe_irq(struct renesas_usb3 *usb3, int num)
446 {
447 usb3_set_bit(usb3, USB_INT_2_PIPE(num), USB3_USB_INT_ENA_2);
448 }
449
450 static void usb3_disable_pipe_irq(struct renesas_usb3 *usb3, int num)
451 {
452 usb3_clear_bit(usb3, USB_INT_2_PIPE(num), USB3_USB_INT_ENA_2);
453 }
454
455 static bool usb3_is_host(struct renesas_usb3 *usb3)
456 {
457 return !(usb3_read(usb3, USB3_DRD_CON) & DRD_CON_PERI_CON);
458 }
459
460 static void usb3_init_axi_bridge(struct renesas_usb3 *usb3)
461 {
462 /* Set AXI_INT */
463 usb3_write(usb3, ~0, USB3_DMA_INT_STA);
464 usb3_write(usb3, 0, USB3_DMA_INT_ENA);
465 usb3_set_bit(usb3, AXI_INT_DMAINT | AXI_INT_EPCINT, USB3_AXI_INT_ENA);
466 }
467
468 static void usb3_init_epc_registers(struct renesas_usb3 *usb3)
469 {
470 usb3_write(usb3, ~0, USB3_USB_INT_STA_1);
471 usb3_enable_irq_1(usb3, USB_INT_1_VBUS_CNG);
472 }
473
474 static bool usb3_wakeup_usb2_phy(struct renesas_usb3 *usb3)
475 {
476 if (!(usb3_read(usb3, USB3_USB20_CON) & USB20_CON_B2_SUSPEND))
477 return true; /* already waked it up */
478
479 usb3_clear_bit(usb3, USB20_CON_B2_SUSPEND, USB3_USB20_CON);
480 usb3_enable_irq_1(usb3, USB_INT_1_B2_RSUM);
481
482 return false;
483 }
484
485 static void usb3_usb2_pullup(struct renesas_usb3 *usb3, int pullup)
486 {
487 u32 bits = USB20_CON_B2_PUE | USB20_CON_B2_CONNECT;
488
489 if (usb3->softconnect && pullup)
490 usb3_set_bit(usb3, bits, USB3_USB20_CON);
491 else
492 usb3_clear_bit(usb3, bits, USB3_USB20_CON);
493 }
494
495 static void usb3_set_test_mode(struct renesas_usb3 *usb3)
496 {
497 u32 val = usb3_read(usb3, USB3_USB20_CON);
498
499 val &= ~USB20_CON_B2_TSTMOD_MASK;
500 val |= USB20_CON_B2_TSTMOD(usb3->test_mode);
501 usb3_write(usb3, val | USB20_CON_B2_TSTMOD_EN, USB3_USB20_CON);
502 if (!usb3->test_mode)
503 usb3_clear_bit(usb3, USB20_CON_B2_TSTMOD_EN, USB3_USB20_CON);
504 }
505
506 static void usb3_start_usb2_connection(struct renesas_usb3 *usb3)
507 {
508 usb3->disabled_count++;
509 usb3_set_bit(usb3, USB_COM_CON_EP0_EN, USB3_USB_COM_CON);
510 usb3_set_bit(usb3, USB_COM_CON_SPD_MODE, USB3_USB_COM_CON);
511 usb3_usb2_pullup(usb3, 1);
512 }
513
514 static int usb3_is_usb3_phy_in_u3(struct renesas_usb3 *usb3)
515 {
516 return usb3_read(usb3, USB3_USB30_CON) & USB30_CON_POW_SEL_IN_U3;
517 }
518
519 static bool usb3_wakeup_usb3_phy(struct renesas_usb3 *usb3)
520 {
521 if (!usb3_is_usb3_phy_in_u3(usb3))
522 return true; /* already waked it up */
523
524 usb3_set_bit(usb3, USB30_CON_B3_PLLWAKE, USB3_USB30_CON);
525 usb3_enable_irq_1(usb3, USB_INT_1_B3_PLLWKUP);
526
527 return false;
528 }
529
530 static u16 usb3_feature_get_un_enabled(struct renesas_usb3 *usb3)
531 {
532 u32 mask_u2 = SSIFCMD_UDIR_U2 | SSIFCMD_UREQ_U2;
533 u32 mask_u1 = SSIFCMD_UDIR_U1 | SSIFCMD_UREQ_U1;
534 u32 val = usb3_read(usb3, USB3_SSIFCMD);
535 u16 ret = 0;
536
537 /* Enables {U2,U1} if the bits of UDIR and UREQ are set to 0 */
538 if (!(val & mask_u2))
539 ret |= 1 << USB_DEV_STAT_U2_ENABLED;
540 if (!(val & mask_u1))
541 ret |= 1 << USB_DEV_STAT_U1_ENABLED;
542
543 return ret;
544 }
545
546 static void usb3_feature_u2_enable(struct renesas_usb3 *usb3, bool enable)
547 {
548 u32 bits = SSIFCMD_UDIR_U2 | SSIFCMD_UREQ_U2;
549
550 /* Enables U2 if the bits of UDIR and UREQ are set to 0 */
551 if (enable)
552 usb3_clear_bit(usb3, bits, USB3_SSIFCMD);
553 else
554 usb3_set_bit(usb3, bits, USB3_SSIFCMD);
555 }
556
557 static void usb3_feature_u1_enable(struct renesas_usb3 *usb3, bool enable)
558 {
559 u32 bits = SSIFCMD_UDIR_U1 | SSIFCMD_UREQ_U1;
560
561 /* Enables U1 if the bits of UDIR and UREQ are set to 0 */
562 if (enable)
563 usb3_clear_bit(usb3, bits, USB3_SSIFCMD);
564 else
565 usb3_set_bit(usb3, bits, USB3_SSIFCMD);
566 }
567
568 static void usb3_start_operation_for_usb3(struct renesas_usb3 *usb3)
569 {
570 usb3_set_bit(usb3, USB_COM_CON_EP0_EN, USB3_USB_COM_CON);
571 usb3_clear_bit(usb3, USB_COM_CON_SPD_MODE, USB3_USB_COM_CON);
572 usb3_set_bit(usb3, USB30_CON_B3_CONNECT, USB3_USB30_CON);
573 }
574
575 static void usb3_start_usb3_connection(struct renesas_usb3 *usb3)
576 {
577 usb3_start_operation_for_usb3(usb3);
578 usb3_set_bit(usb3, USB_COM_CON_RX_DETECTION, USB3_USB_COM_CON);
579
580 usb3_enable_irq_1(usb3, USB_INT_1_B3_LUPSUCS | USB_INT_1_B3_DISABLE |
581 USB_INT_1_SPEED);
582 }
583
584 static void usb3_stop_usb3_connection(struct renesas_usb3 *usb3)
585 {
586 usb3_clear_bit(usb3, USB30_CON_B3_CONNECT, USB3_USB30_CON);
587 }
588
589 static void usb3_transition_to_default_state(struct renesas_usb3 *usb3,
590 bool is_usb3)
591 {
592 usb3_set_bit(usb3, USB_INT_2_PIPE(0), USB3_USB_INT_ENA_2);
593 usb3_write(usb3, P0_INT_ALL_BITS, USB3_P0_INT_STA);
594 usb3_set_bit(usb3, P0_INT_ALL_BITS, USB3_P0_INT_ENA);
595
596 if (is_usb3)
597 usb3_enable_irq_1(usb3, USB_INT_1_B3_WRMRST |
598 USB_INT_1_B3_HOTRST);
599 else
600 usb3_enable_irq_1(usb3, USB_INT_1_B2_SPND |
601 USB_INT_1_B2_L1SPND | USB_INT_1_B2_USBRST);
602 }
603
604 static void usb3_connect(struct renesas_usb3 *usb3)
605 {
606 if (usb3_wakeup_usb3_phy(usb3))
607 usb3_start_usb3_connection(usb3);
608 }
609
610 static void usb3_reset_epc(struct renesas_usb3 *usb3)
611 {
612 usb3_clear_bit(usb3, USB_COM_CON_CONF, USB3_USB_COM_CON);
613 usb3_clear_bit(usb3, USB_COM_CON_EP0_EN, USB3_USB_COM_CON);
614 usb3_set_bit(usb3, USB_COM_CON_PIPE_CLR, USB3_USB_COM_CON);
615 usb3->test_mode = 0;
616 usb3_set_test_mode(usb3);
617 }
618
619 static void usb3_disconnect(struct renesas_usb3 *usb3)
620 {
621 usb3->disabled_count = 0;
622 usb3_usb2_pullup(usb3, 0);
623 usb3_clear_bit(usb3, USB30_CON_B3_CONNECT, USB3_USB30_CON);
624 usb3_reset_epc(usb3);
625
626 if (usb3->driver)
627 usb3->driver->disconnect(&usb3->gadget);
628 }
629
630 static void usb3_check_vbus(struct renesas_usb3 *usb3)
631 {
632 if (usb3->workaround_for_vbus) {
633 usb3_connect(usb3);
634 } else {
635 usb3->extcon_usb = !!(usb3_read(usb3, USB3_USB_STA) &
636 USB_STA_VBUS_STA);
637 if (usb3->extcon_usb)
638 usb3_connect(usb3);
639 else
640 usb3_disconnect(usb3);
641
642 schedule_work(&usb3->extcon_work);
643 }
644 }
645
646 static void usb3_set_mode(struct renesas_usb3 *usb3, bool host)
647 {
648 if (host)
649 usb3_clear_bit(usb3, DRD_CON_PERI_CON, USB3_DRD_CON);
650 else
651 usb3_set_bit(usb3, DRD_CON_PERI_CON, USB3_DRD_CON);
652 }
653
654 static void usb3_vbus_out(struct renesas_usb3 *usb3, bool enable)
655 {
656 if (enable)
657 usb3_set_bit(usb3, DRD_CON_VBOUT, USB3_DRD_CON);
658 else
659 usb3_clear_bit(usb3, DRD_CON_VBOUT, USB3_DRD_CON);
660 }
661
662 static void usb3_mode_config(struct renesas_usb3 *usb3, bool host, bool a_dev)
663 {
664 unsigned long flags;
665
666 spin_lock_irqsave(&usb3->lock, flags);
667 usb3_set_mode(usb3, host);
668 usb3_vbus_out(usb3, a_dev);
669 /* for A-Peripheral or forced B-device mode */
670 if ((!host && a_dev) ||
671 (usb3->workaround_for_vbus && usb3->forced_b_device))
672 usb3_connect(usb3);
673 spin_unlock_irqrestore(&usb3->lock, flags);
674 }
675
676 static bool usb3_is_a_device(struct renesas_usb3 *usb3)
677 {
678 return !(usb3_read(usb3, USB3_USB_OTG_STA) & USB_OTG_IDMON);
679 }
680
681 static void usb3_check_id(struct renesas_usb3 *usb3)
682 {
683 usb3->extcon_host = usb3_is_a_device(usb3);
684
685 if (usb3->extcon_host && !usb3->forced_b_device)
686 usb3_mode_config(usb3, true, true);
687 else
688 usb3_mode_config(usb3, false, false);
689
690 schedule_work(&usb3->extcon_work);
691 }
692
693 static void renesas_usb3_init_controller(struct renesas_usb3 *usb3)
694 {
695 usb3_init_axi_bridge(usb3);
696 usb3_init_epc_registers(usb3);
697 usb3_set_bit(usb3, USB_COM_CON_PN_WDATAIF_NL |
698 USB_COM_CON_PN_RDATAIF_NL | USB_COM_CON_PN_LSTTR_PP,
699 USB3_USB_COM_CON);
700 usb3_write(usb3, USB_OTG_IDMON, USB3_USB_OTG_INT_STA);
701 usb3_write(usb3, USB_OTG_IDMON, USB3_USB_OTG_INT_ENA);
702
703 usb3_check_id(usb3);
704 usb3_check_vbus(usb3);
705 }
706
707 static void renesas_usb3_stop_controller(struct renesas_usb3 *usb3)
708 {
709 usb3_disconnect(usb3);
710 usb3_write(usb3, 0, USB3_P0_INT_ENA);
711 usb3_write(usb3, 0, USB3_USB_OTG_INT_ENA);
712 usb3_write(usb3, 0, USB3_USB_INT_ENA_1);
713 usb3_write(usb3, 0, USB3_USB_INT_ENA_2);
714 usb3_write(usb3, 0, USB3_AXI_INT_ENA);
715 }
716
717 static void usb3_irq_epc_int_1_pll_wakeup(struct renesas_usb3 *usb3)
718 {
719 usb3_disable_irq_1(usb3, USB_INT_1_B3_PLLWKUP);
720 usb3_clear_bit(usb3, USB30_CON_B3_PLLWAKE, USB3_USB30_CON);
721 usb3_start_usb3_connection(usb3);
722 }
723
724 static void usb3_irq_epc_int_1_linkup_success(struct renesas_usb3 *usb3)
725 {
726 usb3_transition_to_default_state(usb3, true);
727 }
728
729 static void usb3_irq_epc_int_1_resume(struct renesas_usb3 *usb3)
730 {
731 usb3_disable_irq_1(usb3, USB_INT_1_B2_RSUM);
732 usb3_start_usb2_connection(usb3);
733 usb3_transition_to_default_state(usb3, false);
734 }
735
736 static void usb3_irq_epc_int_1_disable(struct renesas_usb3 *usb3)
737 {
738 usb3_stop_usb3_connection(usb3);
739 if (usb3_wakeup_usb2_phy(usb3))
740 usb3_irq_epc_int_1_resume(usb3);
741 }
742
743 static void usb3_irq_epc_int_1_bus_reset(struct renesas_usb3 *usb3)
744 {
745 usb3_reset_epc(usb3);
746 if (usb3->disabled_count < 3)
747 usb3_start_usb3_connection(usb3);
748 else
749 usb3_start_usb2_connection(usb3);
750 }
751
752 static void usb3_irq_epc_int_1_vbus_change(struct renesas_usb3 *usb3)
753 {
754 usb3_check_vbus(usb3);
755 }
756
757 static void usb3_irq_epc_int_1_hot_reset(struct renesas_usb3 *usb3)
758 {
759 usb3_reset_epc(usb3);
760 usb3_set_bit(usb3, USB_COM_CON_EP0_EN, USB3_USB_COM_CON);
761
762 /* This bit shall be set within 12ms from the start of HotReset */
763 usb3_set_bit(usb3, USB30_CON_B3_HOTRST_CMP, USB3_USB30_CON);
764 }
765
766 static void usb3_irq_epc_int_1_warm_reset(struct renesas_usb3 *usb3)
767 {
768 usb3_reset_epc(usb3);
769 usb3_set_bit(usb3, USB_COM_CON_EP0_EN, USB3_USB_COM_CON);
770
771 usb3_start_operation_for_usb3(usb3);
772 usb3_enable_irq_1(usb3, USB_INT_1_SPEED);
773 }
774
775 static void usb3_irq_epc_int_1_speed(struct renesas_usb3 *usb3)
776 {
777 u32 speed = usb3_read(usb3, USB3_USB_STA) & USB_STA_SPEED_MASK;
778
779 switch (speed) {
780 case USB_STA_SPEED_SS:
781 usb3->gadget.speed = USB_SPEED_SUPER;
782 break;
783 case USB_STA_SPEED_HS:
784 usb3->gadget.speed = USB_SPEED_HIGH;
785 break;
786 case USB_STA_SPEED_FS:
787 usb3->gadget.speed = USB_SPEED_FULL;
788 break;
789 default:
790 usb3->gadget.speed = USB_SPEED_UNKNOWN;
791 break;
792 }
793 }
794
795 static void usb3_irq_epc_int_1(struct renesas_usb3 *usb3, u32 int_sta_1)
796 {
797 if (int_sta_1 & USB_INT_1_B3_PLLWKUP)
798 usb3_irq_epc_int_1_pll_wakeup(usb3);
799
800 if (int_sta_1 & USB_INT_1_B3_LUPSUCS)
801 usb3_irq_epc_int_1_linkup_success(usb3);
802
803 if (int_sta_1 & USB_INT_1_B3_HOTRST)
804 usb3_irq_epc_int_1_hot_reset(usb3);
805
806 if (int_sta_1 & USB_INT_1_B3_WRMRST)
807 usb3_irq_epc_int_1_warm_reset(usb3);
808
809 if (int_sta_1 & USB_INT_1_B3_DISABLE)
810 usb3_irq_epc_int_1_disable(usb3);
811
812 if (int_sta_1 & USB_INT_1_B2_USBRST)
813 usb3_irq_epc_int_1_bus_reset(usb3);
814
815 if (int_sta_1 & USB_INT_1_B2_RSUM)
816 usb3_irq_epc_int_1_resume(usb3);
817
818 if (int_sta_1 & USB_INT_1_SPEED)
819 usb3_irq_epc_int_1_speed(usb3);
820
821 if (int_sta_1 & USB_INT_1_VBUS_CNG)
822 usb3_irq_epc_int_1_vbus_change(usb3);
823 }
824
825 static struct renesas_usb3_request *__usb3_get_request(struct renesas_usb3_ep
826 *usb3_ep)
827 {
828 return list_first_entry_or_null(&usb3_ep->queue,
829 struct renesas_usb3_request, queue);
830 }
831
832 static struct renesas_usb3_request *usb3_get_request(struct renesas_usb3_ep
833 *usb3_ep)
834 {
835 struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
836 struct renesas_usb3_request *usb3_req;
837 unsigned long flags;
838
839 spin_lock_irqsave(&usb3->lock, flags);
840 usb3_req = __usb3_get_request(usb3_ep);
841 spin_unlock_irqrestore(&usb3->lock, flags);
842
843 return usb3_req;
844 }
845
846 static void __usb3_request_done(struct renesas_usb3_ep *usb3_ep,
847 struct renesas_usb3_request *usb3_req,
848 int status)
849 {
850 struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
851
852 dev_dbg(usb3_to_dev(usb3), "giveback: ep%2d, %u, %u, %d\n",
853 usb3_ep->num, usb3_req->req.length, usb3_req->req.actual,
854 status);
855 usb3_req->req.status = status;
856 usb3_ep->started = false;
857 list_del_init(&usb3_req->queue);
858 spin_unlock(&usb3->lock);
859 usb_gadget_giveback_request(&usb3_ep->ep, &usb3_req->req);
860 spin_lock(&usb3->lock);
861 }
862
863 static void usb3_request_done(struct renesas_usb3_ep *usb3_ep,
864 struct renesas_usb3_request *usb3_req, int status)
865 {
866 struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
867 unsigned long flags;
868
869 spin_lock_irqsave(&usb3->lock, flags);
870 __usb3_request_done(usb3_ep, usb3_req, status);
871 spin_unlock_irqrestore(&usb3->lock, flags);
872 }
873
874 static void usb3_irq_epc_pipe0_status_end(struct renesas_usb3 *usb3)
875 {
876 struct renesas_usb3_ep *usb3_ep = usb3_get_ep(usb3, 0);
877 struct renesas_usb3_request *usb3_req = usb3_get_request(usb3_ep);
878
879 if (usb3_req)
880 usb3_request_done(usb3_ep, usb3_req, 0);
881 if (usb3->test_mode)
882 usb3_set_test_mode(usb3);
883 }
884
885 static void usb3_get_setup_data(struct renesas_usb3 *usb3,
886 struct usb_ctrlrequest *ctrl)
887 {
888 struct renesas_usb3_ep *usb3_ep = usb3_get_ep(usb3, 0);
889 u32 *data = (u32 *)ctrl;
890
891 *data++ = usb3_read(usb3, USB3_STUP_DAT_0);
892 *data = usb3_read(usb3, USB3_STUP_DAT_1);
893
894 /* update this driver's flag */
895 usb3_ep->dir_in = !!(ctrl->bRequestType & USB_DIR_IN);
896 }
897
898 static void usb3_set_p0_con_update_res(struct renesas_usb3 *usb3, u32 res)
899 {
900 u32 val = usb3_read(usb3, USB3_P0_CON);
901
902 val &= ~(P0_CON_ST_RES_MASK | P0_CON_OT_RES_MASK | P0_CON_IN_RES_MASK);
903 val |= res | P0_CON_RES_WEN;
904 usb3_write(usb3, val, USB3_P0_CON);
905 }
906
907 static void usb3_set_p0_con_for_ctrl_read_data(struct renesas_usb3 *usb3)
908 {
909 usb3_set_p0_con_update_res(usb3, P0_CON_ST_RES_FORCE_NRDY |
910 P0_CON_OT_RES_FORCE_STALL |
911 P0_CON_IN_RES_NORMAL);
912 }
913
914 static void usb3_set_p0_con_for_ctrl_read_status(struct renesas_usb3 *usb3)
915 {
916 usb3_set_p0_con_update_res(usb3, P0_CON_ST_RES_NORMAL |
917 P0_CON_OT_RES_FORCE_STALL |
918 P0_CON_IN_RES_NORMAL);
919 }
920
921 static void usb3_set_p0_con_for_ctrl_write_data(struct renesas_usb3 *usb3)
922 {
923 usb3_set_p0_con_update_res(usb3, P0_CON_ST_RES_FORCE_NRDY |
924 P0_CON_OT_RES_NORMAL |
925 P0_CON_IN_RES_FORCE_STALL);
926 }
927
928 static void usb3_set_p0_con_for_ctrl_write_status(struct renesas_usb3 *usb3)
929 {
930 usb3_set_p0_con_update_res(usb3, P0_CON_ST_RES_NORMAL |
931 P0_CON_OT_RES_NORMAL |
932 P0_CON_IN_RES_FORCE_STALL);
933 }
934
935 static void usb3_set_p0_con_for_no_data(struct renesas_usb3 *usb3)
936 {
937 usb3_set_p0_con_update_res(usb3, P0_CON_ST_RES_NORMAL |
938 P0_CON_OT_RES_FORCE_STALL |
939 P0_CON_IN_RES_FORCE_STALL);
940 }
941
942 static void usb3_set_p0_con_stall(struct renesas_usb3 *usb3)
943 {
944 usb3_set_p0_con_update_res(usb3, P0_CON_ST_RES_FORCE_STALL |
945 P0_CON_OT_RES_FORCE_STALL |
946 P0_CON_IN_RES_FORCE_STALL);
947 }
948
949 static void usb3_set_p0_con_stop(struct renesas_usb3 *usb3)
950 {
951 usb3_set_p0_con_update_res(usb3, P0_CON_ST_RES_FORCE_NRDY |
952 P0_CON_OT_RES_FORCE_NRDY |
953 P0_CON_IN_RES_FORCE_NRDY);
954 }
955
956 static int usb3_pn_change(struct renesas_usb3 *usb3, int num)
957 {
958 if (num == 0 || num > usb3->num_usb3_eps)
959 return -ENXIO;
960
961 usb3_write(usb3, num, USB3_PIPE_COM);
962
963 return 0;
964 }
965
966 static void usb3_set_pn_con_update_res(struct renesas_usb3 *usb3, u32 res)
967 {
968 u32 val = usb3_read(usb3, USB3_PN_CON);
969
970 val &= ~PN_CON_RES_MASK;
971 val |= res & PN_CON_RES_MASK;
972 val |= PN_CON_RES_WEN;
973 usb3_write(usb3, val, USB3_PN_CON);
974 }
975
976 static void usb3_pn_start(struct renesas_usb3 *usb3)
977 {
978 usb3_set_pn_con_update_res(usb3, PN_CON_RES_NORMAL);
979 }
980
981 static void usb3_pn_stop(struct renesas_usb3 *usb3)
982 {
983 usb3_set_pn_con_update_res(usb3, PN_CON_RES_FORCE_NRDY);
984 }
985
986 static void usb3_pn_stall(struct renesas_usb3 *usb3)
987 {
988 usb3_set_pn_con_update_res(usb3, PN_CON_RES_FORCE_STALL);
989 }
990
991 static int usb3_pn_con_clear(struct renesas_usb3 *usb3)
992 {
993 usb3_set_bit(usb3, PN_CON_CLR, USB3_PN_CON);
994
995 return usb3_wait(usb3, USB3_PN_CON, PN_CON_CLR, 0);
996 }
997
998 static bool usb3_is_transfer_complete(struct renesas_usb3_ep *usb3_ep,
999 struct renesas_usb3_request *usb3_req)
1000 {
1001 struct usb_request *req = &usb3_req->req;
1002
1003 if ((!req->zero && req->actual == req->length) ||
1004 (req->actual % usb3_ep->ep.maxpacket) || (req->length == 0))
1005 return true;
1006 else
1007 return false;
1008 }
1009
1010 static int usb3_wait_pipe_status(struct renesas_usb3_ep *usb3_ep, u32 mask)
1011 {
1012 struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
1013 u32 sta_reg = usb3_ep->num ? USB3_PN_STA : USB3_P0_STA;
1014
1015 return usb3_wait(usb3, sta_reg, mask, mask);
1016 }
1017
1018 static void usb3_set_px_con_send(struct renesas_usb3_ep *usb3_ep, int bytes,
1019 bool last)
1020 {
1021 struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
1022 u32 con_reg = usb3_ep->num ? USB3_PN_CON : USB3_P0_CON;
1023 u32 val = usb3_read(usb3, con_reg);
1024
1025 val |= PX_CON_SEND | PX_CON_BYTE_EN_BYTES(bytes);
1026 val |= (usb3_ep->num && last) ? PN_CON_LAST : 0;
1027 usb3_write(usb3, val, con_reg);
1028 }
1029
1030 static int usb3_write_pipe(struct renesas_usb3_ep *usb3_ep,
1031 struct renesas_usb3_request *usb3_req,
1032 u32 fifo_reg)
1033 {
1034 struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
1035 int i;
1036 int len = min_t(unsigned, usb3_req->req.length - usb3_req->req.actual,
1037 usb3_ep->ep.maxpacket);
1038 u8 *buf = usb3_req->req.buf + usb3_req->req.actual;
1039 u32 tmp = 0;
1040 bool is_last = !len ? true : false;
1041
1042 if (usb3_wait_pipe_status(usb3_ep, PX_STA_BUFSTS) < 0)
1043 return -EBUSY;
1044
1045 /* Update gadget driver parameter */
1046 usb3_req->req.actual += len;
1047
1048 /* Write data to the register */
1049 if (len >= 4) {
1050 iowrite32_rep(usb3->reg + fifo_reg, buf, len / 4);
1051 buf += (len / 4) * 4;
1052 len %= 4; /* update len to use usb3_set_pX_con_send() */
1053 }
1054
1055 if (len) {
1056 for (i = 0; i < len; i++)
1057 tmp |= buf[i] << (8 * i);
1058 usb3_write(usb3, tmp, fifo_reg);
1059 }
1060
1061 if (!is_last)
1062 is_last = usb3_is_transfer_complete(usb3_ep, usb3_req);
1063 /* Send the data */
1064 usb3_set_px_con_send(usb3_ep, len, is_last);
1065
1066 return is_last ? 0 : -EAGAIN;
1067 }
1068
1069 static u32 usb3_get_received_length(struct renesas_usb3_ep *usb3_ep)
1070 {
1071 struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
1072 u32 lng_reg = usb3_ep->num ? USB3_PN_LNG : USB3_P0_LNG;
1073
1074 return usb3_read(usb3, lng_reg);
1075 }
1076
1077 static int usb3_read_pipe(struct renesas_usb3_ep *usb3_ep,
1078 struct renesas_usb3_request *usb3_req, u32 fifo_reg)
1079 {
1080 struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
1081 int i;
1082 int len = min_t(unsigned, usb3_req->req.length - usb3_req->req.actual,
1083 usb3_get_received_length(usb3_ep));
1084 u8 *buf = usb3_req->req.buf + usb3_req->req.actual;
1085 u32 tmp = 0;
1086
1087 if (!len)
1088 return 0;
1089
1090 /* Update gadget driver parameter */
1091 usb3_req->req.actual += len;
1092
1093 /* Read data from the register */
1094 if (len >= 4) {
1095 ioread32_rep(usb3->reg + fifo_reg, buf, len / 4);
1096 buf += (len / 4) * 4;
1097 len %= 4;
1098 }
1099
1100 if (len) {
1101 tmp = usb3_read(usb3, fifo_reg);
1102 for (i = 0; i < len; i++)
1103 buf[i] = (tmp >> (8 * i)) & 0xff;
1104 }
1105
1106 return usb3_is_transfer_complete(usb3_ep, usb3_req) ? 0 : -EAGAIN;
1107 }
1108
1109 static void usb3_set_status_stage(struct renesas_usb3_ep *usb3_ep,
1110 struct renesas_usb3_request *usb3_req)
1111 {
1112 struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
1113
1114 if (usb3_ep->dir_in) {
1115 usb3_set_p0_con_for_ctrl_read_status(usb3);
1116 } else {
1117 if (!usb3_req->req.length)
1118 usb3_set_p0_con_for_no_data(usb3);
1119 else
1120 usb3_set_p0_con_for_ctrl_write_status(usb3);
1121 }
1122 }
1123
1124 static void usb3_p0_xfer(struct renesas_usb3_ep *usb3_ep,
1125 struct renesas_usb3_request *usb3_req)
1126 {
1127 int ret = -EAGAIN;
1128
1129 if (usb3_ep->dir_in)
1130 ret = usb3_write_pipe(usb3_ep, usb3_req, USB3_P0_WRITE);
1131 else
1132 ret = usb3_read_pipe(usb3_ep, usb3_req, USB3_P0_READ);
1133
1134 if (!ret)
1135 usb3_set_status_stage(usb3_ep, usb3_req);
1136 }
1137
1138 static void usb3_start_pipe0(struct renesas_usb3_ep *usb3_ep,
1139 struct renesas_usb3_request *usb3_req)
1140 {
1141 struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
1142
1143 if (usb3_ep->started)
1144 return;
1145
1146 usb3_ep->started = true;
1147
1148 if (usb3_ep->dir_in) {
1149 usb3_set_bit(usb3, P0_MOD_DIR, USB3_P0_MOD);
1150 usb3_set_p0_con_for_ctrl_read_data(usb3);
1151 } else {
1152 usb3_clear_bit(usb3, P0_MOD_DIR, USB3_P0_MOD);
1153 if (usb3_req->req.length)
1154 usb3_set_p0_con_for_ctrl_write_data(usb3);
1155 }
1156
1157 usb3_p0_xfer(usb3_ep, usb3_req);
1158 }
1159
1160 static void usb3_enable_dma_pipen(struct renesas_usb3 *usb3)
1161 {
1162 usb3_set_bit(usb3, PN_CON_DATAIF_EN, USB3_PN_CON);
1163 }
1164
1165 static void usb3_disable_dma_pipen(struct renesas_usb3 *usb3)
1166 {
1167 usb3_clear_bit(usb3, PN_CON_DATAIF_EN, USB3_PN_CON);
1168 }
1169
1170 static void usb3_enable_dma_irq(struct renesas_usb3 *usb3, int num)
1171 {
1172 usb3_set_bit(usb3, DMA_INT(num), USB3_DMA_INT_ENA);
1173 }
1174
1175 static void usb3_disable_dma_irq(struct renesas_usb3 *usb3, int num)
1176 {
1177 usb3_clear_bit(usb3, DMA_INT(num), USB3_DMA_INT_ENA);
1178 }
1179
1180 static u32 usb3_dma_mps_to_prd_word1(struct renesas_usb3_ep *usb3_ep)
1181 {
1182 switch (usb3_ep->ep.maxpacket) {
1183 case 8:
1184 return USB3_PRD1_MPS_8;
1185 case 16:
1186 return USB3_PRD1_MPS_16;
1187 case 32:
1188 return USB3_PRD1_MPS_32;
1189 case 64:
1190 return USB3_PRD1_MPS_64;
1191 case 512:
1192 return USB3_PRD1_MPS_512;
1193 case 1024:
1194 return USB3_PRD1_MPS_1024;
1195 default:
1196 return USB3_PRD1_MPS_RESERVED;
1197 }
1198 }
1199
1200 static bool usb3_dma_get_setting_area(struct renesas_usb3_ep *usb3_ep,
1201 struct renesas_usb3_request *usb3_req)
1202 {
1203 struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
1204 struct renesas_usb3_dma *dma;
1205 int i;
1206 bool ret = false;
1207
1208 if (usb3_req->req.length > USB3_DMA_MAX_XFER_SIZE_ALL_PRDS) {
1209 dev_dbg(usb3_to_dev(usb3), "%s: the length is too big (%d)\n",
1210 __func__, usb3_req->req.length);
1211 return false;
1212 }
1213
1214 /* The driver doesn't handle zero-length packet via dmac */
1215 if (!usb3_req->req.length)
1216 return false;
1217
1218 if (usb3_dma_mps_to_prd_word1(usb3_ep) == USB3_PRD1_MPS_RESERVED)
1219 return false;
1220
1221 usb3_for_each_dma(usb3, dma, i) {
1222 if (dma->used)
1223 continue;
1224
1225 if (usb_gadget_map_request(&usb3->gadget, &usb3_req->req,
1226 usb3_ep->dir_in) < 0)
1227 break;
1228
1229 dma->used = true;
1230 usb3_ep->dma = dma;
1231 ret = true;
1232 break;
1233 }
1234
1235 return ret;
1236 }
1237
1238 static void usb3_dma_put_setting_area(struct renesas_usb3_ep *usb3_ep,
1239 struct renesas_usb3_request *usb3_req)
1240 {
1241 struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
1242 int i;
1243 struct renesas_usb3_dma *dma;
1244
1245 usb3_for_each_dma(usb3, dma, i) {
1246 if (usb3_ep->dma == dma) {
1247 usb_gadget_unmap_request(&usb3->gadget, &usb3_req->req,
1248 usb3_ep->dir_in);
1249 dma->used = false;
1250 usb3_ep->dma = NULL;
1251 break;
1252 }
1253 }
1254 }
1255
1256 static void usb3_dma_fill_prd(struct renesas_usb3_ep *usb3_ep,
1257 struct renesas_usb3_request *usb3_req)
1258 {
1259 struct renesas_usb3_prd *cur_prd = usb3_ep->dma->prd;
1260 u32 remain = usb3_req->req.length;
1261 u32 dma = usb3_req->req.dma;
1262 u32 len;
1263 int i = 0;
1264
1265 do {
1266 len = min_t(u32, remain, USB3_DMA_MAX_XFER_SIZE) &
1267 USB3_PRD1_SIZE_MASK;
1268 cur_prd->word1 = usb3_dma_mps_to_prd_word1(usb3_ep) |
1269 USB3_PRD1_B_INC | len;
1270 cur_prd->bap = dma;
1271 remain -= len;
1272 dma += len;
1273 if (!remain || (i + 1) < USB3_DMA_NUM_PRD_ENTRIES)
1274 break;
1275
1276 cur_prd++;
1277 i++;
1278 } while (1);
1279
1280 cur_prd->word1 |= USB3_PRD1_E | USB3_PRD1_INT;
1281 if (usb3_ep->dir_in)
1282 cur_prd->word1 |= USB3_PRD1_LST;
1283 }
1284
1285 static void usb3_dma_kick_prd(struct renesas_usb3_ep *usb3_ep)
1286 {
1287 struct renesas_usb3_dma *dma = usb3_ep->dma;
1288 struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
1289 u32 dma_con = DMA_COM_PIPE_NO(usb3_ep->num) | DMA_CON_PRD_EN;
1290
1291 if (usb3_ep->dir_in)
1292 dma_con |= DMA_CON_PIPE_DIR;
1293
1294 wmb(); /* prd entries should be in system memory here */
1295
1296 usb3_write(usb3, 1 << usb3_ep->num, USB3_DMA_INT_STA);
1297 usb3_write(usb3, AXI_INT_PRDEN_CLR_STA(dma->num) |
1298 AXI_INT_PRDERR_STA(dma->num), USB3_AXI_INT_STA);
1299
1300 usb3_write(usb3, dma->prd_dma, USB3_DMA_CH0_PRD_ADR(dma->num));
1301 usb3_write(usb3, dma_con, USB3_DMA_CH0_CON(dma->num));
1302 usb3_enable_dma_irq(usb3, usb3_ep->num);
1303 }
1304
1305 static void usb3_dma_stop_prd(struct renesas_usb3_ep *usb3_ep)
1306 {
1307 struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
1308 struct renesas_usb3_dma *dma = usb3_ep->dma;
1309
1310 usb3_disable_dma_irq(usb3, usb3_ep->num);
1311 usb3_write(usb3, 0, USB3_DMA_CH0_CON(dma->num));
1312 }
1313
1314 static int usb3_dma_update_status(struct renesas_usb3_ep *usb3_ep,
1315 struct renesas_usb3_request *usb3_req)
1316 {
1317 struct renesas_usb3_prd *cur_prd = usb3_ep->dma->prd;
1318 struct usb_request *req = &usb3_req->req;
1319 u32 remain, len;
1320 int i = 0;
1321 int status = 0;
1322
1323 rmb(); /* The controller updated prd entries */
1324
1325 do {
1326 if (cur_prd->word1 & USB3_PRD1_D)
1327 status = -EIO;
1328 if (cur_prd->word1 & USB3_PRD1_E)
1329 len = req->length % USB3_DMA_MAX_XFER_SIZE;
1330 else
1331 len = USB3_DMA_MAX_XFER_SIZE;
1332 remain = cur_prd->word1 & USB3_PRD1_SIZE_MASK;
1333 req->actual += len - remain;
1334
1335 if (cur_prd->word1 & USB3_PRD1_E ||
1336 (i + 1) < USB3_DMA_NUM_PRD_ENTRIES)
1337 break;
1338
1339 cur_prd++;
1340 i++;
1341 } while (1);
1342
1343 return status;
1344 }
1345
1346 static bool usb3_dma_try_start(struct renesas_usb3_ep *usb3_ep,
1347 struct renesas_usb3_request *usb3_req)
1348 {
1349 struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
1350
1351 if (!use_dma)
1352 return false;
1353
1354 if (usb3_dma_get_setting_area(usb3_ep, usb3_req)) {
1355 usb3_pn_stop(usb3);
1356 usb3_enable_dma_pipen(usb3);
1357 usb3_dma_fill_prd(usb3_ep, usb3_req);
1358 usb3_dma_kick_prd(usb3_ep);
1359 usb3_pn_start(usb3);
1360 return true;
1361 }
1362
1363 return false;
1364 }
1365
1366 static int usb3_dma_try_stop(struct renesas_usb3_ep *usb3_ep,
1367 struct renesas_usb3_request *usb3_req)
1368 {
1369 struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
1370 unsigned long flags;
1371 int status = 0;
1372
1373 spin_lock_irqsave(&usb3->lock, flags);
1374 if (!usb3_ep->dma)
1375 goto out;
1376
1377 if (!usb3_pn_change(usb3, usb3_ep->num))
1378 usb3_disable_dma_pipen(usb3);
1379 usb3_dma_stop_prd(usb3_ep);
1380 status = usb3_dma_update_status(usb3_ep, usb3_req);
1381 usb3_dma_put_setting_area(usb3_ep, usb3_req);
1382
1383 out:
1384 spin_unlock_irqrestore(&usb3->lock, flags);
1385 return status;
1386 }
1387
1388 static int renesas_usb3_dma_free_prd(struct renesas_usb3 *usb3,
1389 struct device *dev)
1390 {
1391 int i;
1392 struct renesas_usb3_dma *dma;
1393
1394 usb3_for_each_dma(usb3, dma, i) {
1395 if (dma->prd) {
1396 dma_free_coherent(dev, USB3_DMA_PRD_SIZE,
1397 dma->prd, dma->prd_dma);
1398 dma->prd = NULL;
1399 }
1400 }
1401
1402 return 0;
1403 }
1404
1405 static int renesas_usb3_dma_alloc_prd(struct renesas_usb3 *usb3,
1406 struct device *dev)
1407 {
1408 int i;
1409 struct renesas_usb3_dma *dma;
1410
1411 if (!use_dma)
1412 return 0;
1413
1414 usb3_for_each_dma(usb3, dma, i) {
1415 dma->prd = dma_alloc_coherent(dev, USB3_DMA_PRD_SIZE,
1416 &dma->prd_dma, GFP_KERNEL);
1417 if (!dma->prd) {
1418 renesas_usb3_dma_free_prd(usb3, dev);
1419 return -ENOMEM;
1420 }
1421 dma->num = i + 1;
1422 }
1423
1424 return 0;
1425 }
1426
1427 static void usb3_start_pipen(struct renesas_usb3_ep *usb3_ep,
1428 struct renesas_usb3_request *usb3_req)
1429 {
1430 struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
1431 struct renesas_usb3_request *usb3_req_first = usb3_get_request(usb3_ep);
1432 unsigned long flags;
1433 int ret = -EAGAIN;
1434 u32 enable_bits = 0;
1435
1436 spin_lock_irqsave(&usb3->lock, flags);
1437 if (usb3_ep->halt || usb3_ep->started)
1438 goto out;
1439 if (usb3_req != usb3_req_first)
1440 goto out;
1441
1442 if (usb3_pn_change(usb3, usb3_ep->num) < 0)
1443 goto out;
1444
1445 usb3_ep->started = true;
1446
1447 if (usb3_dma_try_start(usb3_ep, usb3_req))
1448 goto out;
1449
1450 usb3_pn_start(usb3);
1451
1452 if (usb3_ep->dir_in) {
1453 ret = usb3_write_pipe(usb3_ep, usb3_req, USB3_PN_WRITE);
1454 enable_bits |= PN_INT_LSTTR;
1455 }
1456
1457 if (ret < 0)
1458 enable_bits |= PN_INT_BFRDY;
1459
1460 if (enable_bits) {
1461 usb3_set_bit(usb3, enable_bits, USB3_PN_INT_ENA);
1462 usb3_enable_pipe_irq(usb3, usb3_ep->num);
1463 }
1464 out:
1465 spin_unlock_irqrestore(&usb3->lock, flags);
1466 }
1467
1468 static int renesas_usb3_ep_queue(struct usb_ep *_ep, struct usb_request *_req,
1469 gfp_t gfp_flags)
1470 {
1471 struct renesas_usb3_ep *usb3_ep = usb_ep_to_usb3_ep(_ep);
1472 struct renesas_usb3_request *usb3_req = usb_req_to_usb3_req(_req);
1473 struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
1474 unsigned long flags;
1475
1476 dev_dbg(usb3_to_dev(usb3), "ep_queue: ep%2d, %u\n", usb3_ep->num,
1477 _req->length);
1478
1479 _req->status = -EINPROGRESS;
1480 _req->actual = 0;
1481 spin_lock_irqsave(&usb3->lock, flags);
1482 list_add_tail(&usb3_req->queue, &usb3_ep->queue);
1483 spin_unlock_irqrestore(&usb3->lock, flags);
1484
1485 if (!usb3_ep->num)
1486 usb3_start_pipe0(usb3_ep, usb3_req);
1487 else
1488 usb3_start_pipen(usb3_ep, usb3_req);
1489
1490 return 0;
1491 }
1492
1493 static void usb3_set_device_address(struct renesas_usb3 *usb3, u16 addr)
1494 {
1495 /* DEV_ADDR bit field is cleared by WarmReset, HotReset and BusReset */
1496 usb3_set_bit(usb3, USB_COM_CON_DEV_ADDR(addr), USB3_USB_COM_CON);
1497 }
1498
1499 static bool usb3_std_req_set_address(struct renesas_usb3 *usb3,
1500 struct usb_ctrlrequest *ctrl)
1501 {
1502 if (ctrl->wValue >= 128)
1503 return true; /* stall */
1504
1505 usb3_set_device_address(usb3, ctrl->wValue);
1506 usb3_set_p0_con_for_no_data(usb3);
1507
1508 return false;
1509 }
1510
1511 static void usb3_pipe0_internal_xfer(struct renesas_usb3 *usb3,
1512 void *tx_data, size_t len,
1513 void (*complete)(struct usb_ep *ep,
1514 struct usb_request *req))
1515 {
1516 struct renesas_usb3_ep *usb3_ep = usb3_get_ep(usb3, 0);
1517
1518 if (tx_data)
1519 memcpy(usb3->ep0_buf, tx_data,
1520 min_t(size_t, len, USB3_EP0_BUF_SIZE));
1521
1522 usb3->ep0_req->buf = &usb3->ep0_buf;
1523 usb3->ep0_req->length = len;
1524 usb3->ep0_req->complete = complete;
1525 renesas_usb3_ep_queue(&usb3_ep->ep, usb3->ep0_req, GFP_ATOMIC);
1526 }
1527
1528 static void usb3_pipe0_get_status_completion(struct usb_ep *ep,
1529 struct usb_request *req)
1530 {
1531 }
1532
1533 static bool usb3_std_req_get_status(struct renesas_usb3 *usb3,
1534 struct usb_ctrlrequest *ctrl)
1535 {
1536 bool stall = false;
1537 struct renesas_usb3_ep *usb3_ep;
1538 int num;
1539 u16 status = 0;
1540
1541 switch (ctrl->bRequestType & USB_RECIP_MASK) {
1542 case USB_RECIP_DEVICE:
1543 if (usb3->gadget.is_selfpowered)
1544 status |= 1 << USB_DEVICE_SELF_POWERED;
1545 if (usb3->gadget.speed == USB_SPEED_SUPER)
1546 status |= usb3_feature_get_un_enabled(usb3);
1547 break;
1548 case USB_RECIP_INTERFACE:
1549 break;
1550 case USB_RECIP_ENDPOINT:
1551 num = le16_to_cpu(ctrl->wIndex) & USB_ENDPOINT_NUMBER_MASK;
1552 usb3_ep = usb3_get_ep(usb3, num);
1553 if (usb3_ep->halt)
1554 status |= 1 << USB_ENDPOINT_HALT;
1555 break;
1556 default:
1557 stall = true;
1558 break;
1559 }
1560
1561 if (!stall) {
1562 status = cpu_to_le16(status);
1563 dev_dbg(usb3_to_dev(usb3), "get_status: req = %p\n",
1564 usb_req_to_usb3_req(usb3->ep0_req));
1565 usb3_pipe0_internal_xfer(usb3, &status, sizeof(status),
1566 usb3_pipe0_get_status_completion);
1567 }
1568
1569 return stall;
1570 }
1571
1572 static bool usb3_std_req_feature_device(struct renesas_usb3 *usb3,
1573 struct usb_ctrlrequest *ctrl, bool set)
1574 {
1575 bool stall = true;
1576 u16 w_value = le16_to_cpu(ctrl->wValue);
1577
1578 switch (w_value) {
1579 case USB_DEVICE_TEST_MODE:
1580 if (!set)
1581 break;
1582 usb3->test_mode = le16_to_cpu(ctrl->wIndex) >> 8;
1583 stall = false;
1584 break;
1585 case USB_DEVICE_U1_ENABLE:
1586 case USB_DEVICE_U2_ENABLE:
1587 if (usb3->gadget.speed != USB_SPEED_SUPER)
1588 break;
1589 if (w_value == USB_DEVICE_U1_ENABLE)
1590 usb3_feature_u1_enable(usb3, set);
1591 if (w_value == USB_DEVICE_U2_ENABLE)
1592 usb3_feature_u2_enable(usb3, set);
1593 stall = false;
1594 break;
1595 default:
1596 break;
1597 }
1598
1599 return stall;
1600 }
1601
1602 static int usb3_set_halt_p0(struct renesas_usb3_ep *usb3_ep, bool halt)
1603 {
1604 struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
1605
1606 if (unlikely(usb3_ep->num))
1607 return -EINVAL;
1608
1609 usb3_ep->halt = halt;
1610 if (halt)
1611 usb3_set_p0_con_stall(usb3);
1612 else
1613 usb3_set_p0_con_stop(usb3);
1614
1615 return 0;
1616 }
1617
1618 static int usb3_set_halt_pn(struct renesas_usb3_ep *usb3_ep, bool halt,
1619 bool is_clear_feature)
1620 {
1621 struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
1622 unsigned long flags;
1623
1624 spin_lock_irqsave(&usb3->lock, flags);
1625 if (!usb3_pn_change(usb3, usb3_ep->num)) {
1626 usb3_ep->halt = halt;
1627 if (halt) {
1628 usb3_pn_stall(usb3);
1629 } else if (!is_clear_feature || !usb3_ep->wedge) {
1630 usb3_pn_con_clear(usb3);
1631 usb3_set_bit(usb3, PN_CON_EN, USB3_PN_CON);
1632 usb3_pn_stop(usb3);
1633 }
1634 }
1635 spin_unlock_irqrestore(&usb3->lock, flags);
1636
1637 return 0;
1638 }
1639
1640 static int usb3_set_halt(struct renesas_usb3_ep *usb3_ep, bool halt,
1641 bool is_clear_feature)
1642 {
1643 int ret = 0;
1644
1645 if (halt && usb3_ep->started)
1646 return -EAGAIN;
1647
1648 if (usb3_ep->num)
1649 ret = usb3_set_halt_pn(usb3_ep, halt, is_clear_feature);
1650 else
1651 ret = usb3_set_halt_p0(usb3_ep, halt);
1652
1653 return ret;
1654 }
1655
1656 static bool usb3_std_req_feature_endpoint(struct renesas_usb3 *usb3,
1657 struct usb_ctrlrequest *ctrl,
1658 bool set)
1659 {
1660 int num = le16_to_cpu(ctrl->wIndex) & USB_ENDPOINT_NUMBER_MASK;
1661 struct renesas_usb3_ep *usb3_ep;
1662 struct renesas_usb3_request *usb3_req;
1663
1664 if (le16_to_cpu(ctrl->wValue) != USB_ENDPOINT_HALT)
1665 return true; /* stall */
1666
1667 usb3_ep = usb3_get_ep(usb3, num);
1668 usb3_set_halt(usb3_ep, set, true);
1669
1670 /* Restarts a queue if clear feature */
1671 if (!set) {
1672 usb3_ep->started = false;
1673 usb3_req = usb3_get_request(usb3_ep);
1674 if (usb3_req)
1675 usb3_start_pipen(usb3_ep, usb3_req);
1676 }
1677
1678 return false;
1679 }
1680
1681 static bool usb3_std_req_feature(struct renesas_usb3 *usb3,
1682 struct usb_ctrlrequest *ctrl, bool set)
1683 {
1684 bool stall = false;
1685
1686 switch (ctrl->bRequestType & USB_RECIP_MASK) {
1687 case USB_RECIP_DEVICE:
1688 stall = usb3_std_req_feature_device(usb3, ctrl, set);
1689 break;
1690 case USB_RECIP_INTERFACE:
1691 break;
1692 case USB_RECIP_ENDPOINT:
1693 stall = usb3_std_req_feature_endpoint(usb3, ctrl, set);
1694 break;
1695 default:
1696 stall = true;
1697 break;
1698 }
1699
1700 if (!stall)
1701 usb3_set_p0_con_for_no_data(usb3);
1702
1703 return stall;
1704 }
1705
1706 static void usb3_pipe0_set_sel_completion(struct usb_ep *ep,
1707 struct usb_request *req)
1708 {
1709 /* TODO */
1710 }
1711
1712 static bool usb3_std_req_set_sel(struct renesas_usb3 *usb3,
1713 struct usb_ctrlrequest *ctrl)
1714 {
1715 u16 w_length = le16_to_cpu(ctrl->wLength);
1716
1717 if (w_length != 6)
1718 return true; /* stall */
1719
1720 dev_dbg(usb3_to_dev(usb3), "set_sel: req = %p\n",
1721 usb_req_to_usb3_req(usb3->ep0_req));
1722 usb3_pipe0_internal_xfer(usb3, NULL, 6, usb3_pipe0_set_sel_completion);
1723
1724 return false;
1725 }
1726
1727 static bool usb3_std_req_set_configuration(struct renesas_usb3 *usb3,
1728 struct usb_ctrlrequest *ctrl)
1729 {
1730 if (ctrl->wValue > 0)
1731 usb3_set_bit(usb3, USB_COM_CON_CONF, USB3_USB_COM_CON);
1732 else
1733 usb3_clear_bit(usb3, USB_COM_CON_CONF, USB3_USB_COM_CON);
1734
1735 return false;
1736 }
1737
1738 /**
1739 * usb3_handle_standard_request - handle some standard requests
1740 * @usb3: the renesas_usb3 pointer
1741 * @ctrl: a pointer of setup data
1742 *
1743 * Returns true if this function handled a standard request
1744 */
1745 static bool usb3_handle_standard_request(struct renesas_usb3 *usb3,
1746 struct usb_ctrlrequest *ctrl)
1747 {
1748 bool ret = false;
1749 bool stall = false;
1750
1751 if ((ctrl->bRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD) {
1752 switch (ctrl->bRequest) {
1753 case USB_REQ_SET_ADDRESS:
1754 stall = usb3_std_req_set_address(usb3, ctrl);
1755 ret = true;
1756 break;
1757 case USB_REQ_GET_STATUS:
1758 stall = usb3_std_req_get_status(usb3, ctrl);
1759 ret = true;
1760 break;
1761 case USB_REQ_CLEAR_FEATURE:
1762 stall = usb3_std_req_feature(usb3, ctrl, false);
1763 ret = true;
1764 break;
1765 case USB_REQ_SET_FEATURE:
1766 stall = usb3_std_req_feature(usb3, ctrl, true);
1767 ret = true;
1768 break;
1769 case USB_REQ_SET_SEL:
1770 stall = usb3_std_req_set_sel(usb3, ctrl);
1771 ret = true;
1772 break;
1773 case USB_REQ_SET_ISOCH_DELAY:
1774 /* This hardware doesn't support Isochronous xfer */
1775 stall = true;
1776 ret = true;
1777 break;
1778 case USB_REQ_SET_CONFIGURATION:
1779 usb3_std_req_set_configuration(usb3, ctrl);
1780 break;
1781 default:
1782 break;
1783 }
1784 }
1785
1786 if (stall)
1787 usb3_set_p0_con_stall(usb3);
1788
1789 return ret;
1790 }
1791
1792 static int usb3_p0_con_clear_buffer(struct renesas_usb3 *usb3)
1793 {
1794 usb3_set_bit(usb3, P0_CON_BCLR, USB3_P0_CON);
1795
1796 return usb3_wait(usb3, USB3_P0_CON, P0_CON_BCLR, 0);
1797 }
1798
1799 static void usb3_irq_epc_pipe0_setup(struct renesas_usb3 *usb3)
1800 {
1801 struct usb_ctrlrequest ctrl;
1802 struct renesas_usb3_ep *usb3_ep = usb3_get_ep(usb3, 0);
1803
1804 /* Call giveback function if previous transfer is not completed */
1805 if (usb3_ep->started)
1806 usb3_request_done(usb3_ep, usb3_get_request(usb3_ep),
1807 -ECONNRESET);
1808
1809 usb3_p0_con_clear_buffer(usb3);
1810 usb3_get_setup_data(usb3, &ctrl);
1811 if (!usb3_handle_standard_request(usb3, &ctrl))
1812 if (usb3->driver->setup(&usb3->gadget, &ctrl) < 0)
1813 usb3_set_p0_con_stall(usb3);
1814 }
1815
1816 static void usb3_irq_epc_pipe0_bfrdy(struct renesas_usb3 *usb3)
1817 {
1818 struct renesas_usb3_ep *usb3_ep = usb3_get_ep(usb3, 0);
1819 struct renesas_usb3_request *usb3_req = usb3_get_request(usb3_ep);
1820
1821 if (!usb3_req)
1822 return;
1823
1824 usb3_p0_xfer(usb3_ep, usb3_req);
1825 }
1826
1827 static void usb3_irq_epc_pipe0(struct renesas_usb3 *usb3)
1828 {
1829 u32 p0_int_sta = usb3_read(usb3, USB3_P0_INT_STA);
1830
1831 p0_int_sta &= usb3_read(usb3, USB3_P0_INT_ENA);
1832 usb3_write(usb3, p0_int_sta, USB3_P0_INT_STA);
1833 if (p0_int_sta & P0_INT_STSED)
1834 usb3_irq_epc_pipe0_status_end(usb3);
1835 if (p0_int_sta & P0_INT_SETUP)
1836 usb3_irq_epc_pipe0_setup(usb3);
1837 if (p0_int_sta & P0_INT_BFRDY)
1838 usb3_irq_epc_pipe0_bfrdy(usb3);
1839 }
1840
1841 static void usb3_request_done_pipen(struct renesas_usb3 *usb3,
1842 struct renesas_usb3_ep *usb3_ep,
1843 struct renesas_usb3_request *usb3_req,
1844 int status)
1845 {
1846 unsigned long flags;
1847
1848 spin_lock_irqsave(&usb3->lock, flags);
1849 if (usb3_pn_change(usb3, usb3_ep->num))
1850 usb3_pn_stop(usb3);
1851 spin_unlock_irqrestore(&usb3->lock, flags);
1852
1853 usb3_disable_pipe_irq(usb3, usb3_ep->num);
1854 usb3_request_done(usb3_ep, usb3_req, status);
1855
1856 /* get next usb3_req */
1857 usb3_req = usb3_get_request(usb3_ep);
1858 if (usb3_req)
1859 usb3_start_pipen(usb3_ep, usb3_req);
1860 }
1861
1862 static void usb3_irq_epc_pipen_lsttr(struct renesas_usb3 *usb3, int num)
1863 {
1864 struct renesas_usb3_ep *usb3_ep = usb3_get_ep(usb3, num);
1865 struct renesas_usb3_request *usb3_req = usb3_get_request(usb3_ep);
1866
1867 if (!usb3_req)
1868 return;
1869
1870 if (usb3_ep->dir_in) {
1871 dev_dbg(usb3_to_dev(usb3), "%s: len = %u, actual = %u\n",
1872 __func__, usb3_req->req.length, usb3_req->req.actual);
1873 usb3_request_done_pipen(usb3, usb3_ep, usb3_req, 0);
1874 }
1875 }
1876
1877 static void usb3_irq_epc_pipen_bfrdy(struct renesas_usb3 *usb3, int num)
1878 {
1879 struct renesas_usb3_ep *usb3_ep = usb3_get_ep(usb3, num);
1880 struct renesas_usb3_request *usb3_req = usb3_get_request(usb3_ep);
1881 bool done = false;
1882
1883 if (!usb3_req)
1884 return;
1885
1886 spin_lock(&usb3->lock);
1887 if (usb3_pn_change(usb3, num))
1888 goto out;
1889
1890 if (usb3_ep->dir_in) {
1891 /* Do not stop the IN pipe here to detect LSTTR interrupt */
1892 if (!usb3_write_pipe(usb3_ep, usb3_req, USB3_PN_WRITE))
1893 usb3_clear_bit(usb3, PN_INT_BFRDY, USB3_PN_INT_ENA);
1894 } else {
1895 if (!usb3_read_pipe(usb3_ep, usb3_req, USB3_PN_READ))
1896 done = true;
1897 }
1898
1899 out:
1900 /* need to unlock because usb3_request_done_pipen() locks it */
1901 spin_unlock(&usb3->lock);
1902
1903 if (done)
1904 usb3_request_done_pipen(usb3, usb3_ep, usb3_req, 0);
1905 }
1906
1907 static void usb3_irq_epc_pipen(struct renesas_usb3 *usb3, int num)
1908 {
1909 u32 pn_int_sta;
1910
1911 spin_lock(&usb3->lock);
1912 if (usb3_pn_change(usb3, num) < 0) {
1913 spin_unlock(&usb3->lock);
1914 return;
1915 }
1916
1917 pn_int_sta = usb3_read(usb3, USB3_PN_INT_STA);
1918 pn_int_sta &= usb3_read(usb3, USB3_PN_INT_ENA);
1919 usb3_write(usb3, pn_int_sta, USB3_PN_INT_STA);
1920 spin_unlock(&usb3->lock);
1921 if (pn_int_sta & PN_INT_LSTTR)
1922 usb3_irq_epc_pipen_lsttr(usb3, num);
1923 if (pn_int_sta & PN_INT_BFRDY)
1924 usb3_irq_epc_pipen_bfrdy(usb3, num);
1925 }
1926
1927 static void usb3_irq_epc_int_2(struct renesas_usb3 *usb3, u32 int_sta_2)
1928 {
1929 int i;
1930
1931 for (i = 0; i < usb3->num_usb3_eps; i++) {
1932 if (int_sta_2 & USB_INT_2_PIPE(i)) {
1933 if (!i)
1934 usb3_irq_epc_pipe0(usb3);
1935 else
1936 usb3_irq_epc_pipen(usb3, i);
1937 }
1938 }
1939 }
1940
1941 static void usb3_irq_idmon_change(struct renesas_usb3 *usb3)
1942 {
1943 usb3_check_id(usb3);
1944 }
1945
1946 static void usb3_irq_otg_int(struct renesas_usb3 *usb3, u32 otg_int_sta)
1947 {
1948 if (otg_int_sta & USB_OTG_IDMON)
1949 usb3_irq_idmon_change(usb3);
1950 }
1951
1952 static void usb3_irq_epc(struct renesas_usb3 *usb3)
1953 {
1954 u32 int_sta_1 = usb3_read(usb3, USB3_USB_INT_STA_1);
1955 u32 int_sta_2 = usb3_read(usb3, USB3_USB_INT_STA_2);
1956 u32 otg_int_sta = usb3_read(usb3, USB3_USB_OTG_INT_STA);
1957
1958 int_sta_1 &= usb3_read(usb3, USB3_USB_INT_ENA_1);
1959 if (int_sta_1) {
1960 usb3_write(usb3, int_sta_1, USB3_USB_INT_STA_1);
1961 usb3_irq_epc_int_1(usb3, int_sta_1);
1962 }
1963
1964 int_sta_2 &= usb3_read(usb3, USB3_USB_INT_ENA_2);
1965 if (int_sta_2)
1966 usb3_irq_epc_int_2(usb3, int_sta_2);
1967
1968 otg_int_sta &= usb3_read(usb3, USB3_USB_OTG_INT_ENA);
1969 if (otg_int_sta) {
1970 usb3_write(usb3, otg_int_sta, USB3_USB_OTG_INT_STA);
1971 usb3_irq_otg_int(usb3, otg_int_sta);
1972 }
1973 }
1974
1975 static void usb3_irq_dma_int(struct renesas_usb3 *usb3, u32 dma_sta)
1976 {
1977 struct renesas_usb3_ep *usb3_ep;
1978 struct renesas_usb3_request *usb3_req;
1979 int i, status;
1980
1981 for (i = 0; i < usb3->num_usb3_eps; i++) {
1982 if (!(dma_sta & DMA_INT(i)))
1983 continue;
1984
1985 usb3_ep = usb3_get_ep(usb3, i);
1986 if (!(usb3_read(usb3, USB3_AXI_INT_STA) &
1987 AXI_INT_PRDEN_CLR_STA(usb3_ep->dma->num)))
1988 continue;
1989
1990 usb3_req = usb3_get_request(usb3_ep);
1991 status = usb3_dma_try_stop(usb3_ep, usb3_req);
1992 usb3_request_done_pipen(usb3, usb3_ep, usb3_req, status);
1993 }
1994 }
1995
1996 static void usb3_irq_dma(struct renesas_usb3 *usb3)
1997 {
1998 u32 dma_sta = usb3_read(usb3, USB3_DMA_INT_STA);
1999
2000 dma_sta &= usb3_read(usb3, USB3_DMA_INT_ENA);
2001 if (dma_sta) {
2002 usb3_write(usb3, dma_sta, USB3_DMA_INT_STA);
2003 usb3_irq_dma_int(usb3, dma_sta);
2004 }
2005 }
2006
2007 static irqreturn_t renesas_usb3_irq(int irq, void *_usb3)
2008 {
2009 struct renesas_usb3 *usb3 = _usb3;
2010 irqreturn_t ret = IRQ_NONE;
2011 u32 axi_int_sta = usb3_read(usb3, USB3_AXI_INT_STA);
2012
2013 if (axi_int_sta & AXI_INT_DMAINT) {
2014 usb3_irq_dma(usb3);
2015 ret = IRQ_HANDLED;
2016 }
2017
2018 if (axi_int_sta & AXI_INT_EPCINT) {
2019 usb3_irq_epc(usb3);
2020 ret = IRQ_HANDLED;
2021 }
2022
2023 return ret;
2024 }
2025
2026 static void usb3_write_pn_mod(struct renesas_usb3_ep *usb3_ep,
2027 const struct usb_endpoint_descriptor *desc)
2028 {
2029 struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
2030 u32 val = 0;
2031
2032 val |= usb3_ep->dir_in ? PN_MOD_DIR : 0;
2033 val |= PN_MOD_TYPE(usb_endpoint_type(desc));
2034 val |= PN_MOD_EPNUM(usb_endpoint_num(desc));
2035 usb3_write(usb3, val, USB3_PN_MOD);
2036 }
2037
2038 static u32 usb3_calc_ramarea(int ram_size)
2039 {
2040 WARN_ON(ram_size > SZ_16K);
2041
2042 if (ram_size <= SZ_1K)
2043 return PN_RAMMAP_RAMAREA_1KB;
2044 else if (ram_size <= SZ_2K)
2045 return PN_RAMMAP_RAMAREA_2KB;
2046 else if (ram_size <= SZ_4K)
2047 return PN_RAMMAP_RAMAREA_4KB;
2048 else if (ram_size <= SZ_8K)
2049 return PN_RAMMAP_RAMAREA_8KB;
2050 else
2051 return PN_RAMMAP_RAMAREA_16KB;
2052 }
2053
2054 static u32 usb3_calc_rammap_val(struct renesas_usb3_ep *usb3_ep,
2055 const struct usb_endpoint_descriptor *desc)
2056 {
2057 int i;
2058 static const u32 max_packet_array[] = {8, 16, 32, 64, 512};
2059 u32 mpkt = PN_RAMMAP_MPKT(1024);
2060
2061 for (i = 0; i < ARRAY_SIZE(max_packet_array); i++) {
2062 if (usb_endpoint_maxp(desc) <= max_packet_array[i])
2063 mpkt = PN_RAMMAP_MPKT(max_packet_array[i]);
2064 }
2065
2066 return usb3_ep->rammap_val | mpkt;
2067 }
2068
2069 static int usb3_enable_pipe_n(struct renesas_usb3_ep *usb3_ep,
2070 const struct usb_endpoint_descriptor *desc)
2071 {
2072 struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
2073 unsigned long flags;
2074
2075 usb3_ep->dir_in = usb_endpoint_dir_in(desc);
2076
2077 spin_lock_irqsave(&usb3->lock, flags);
2078 if (!usb3_pn_change(usb3, usb3_ep->num)) {
2079 usb3_write_pn_mod(usb3_ep, desc);
2080 usb3_write(usb3, usb3_calc_rammap_val(usb3_ep, desc),
2081 USB3_PN_RAMMAP);
2082 usb3_pn_con_clear(usb3);
2083 usb3_set_bit(usb3, PN_CON_EN, USB3_PN_CON);
2084 }
2085 spin_unlock_irqrestore(&usb3->lock, flags);
2086
2087 return 0;
2088 }
2089
2090 static int usb3_disable_pipe_n(struct renesas_usb3_ep *usb3_ep)
2091 {
2092 struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
2093 unsigned long flags;
2094
2095 usb3_ep->halt = false;
2096
2097 spin_lock_irqsave(&usb3->lock, flags);
2098 if (!usb3_pn_change(usb3, usb3_ep->num)) {
2099 usb3_write(usb3, 0, USB3_PN_INT_ENA);
2100 usb3_write(usb3, 0, USB3_PN_RAMMAP);
2101 usb3_clear_bit(usb3, PN_CON_EN, USB3_PN_CON);
2102 }
2103 spin_unlock_irqrestore(&usb3->lock, flags);
2104
2105 return 0;
2106 }
2107
2108 /*------- usb_ep_ops -----------------------------------------------------*/
2109 static int renesas_usb3_ep_enable(struct usb_ep *_ep,
2110 const struct usb_endpoint_descriptor *desc)
2111 {
2112 struct renesas_usb3_ep *usb3_ep = usb_ep_to_usb3_ep(_ep);
2113
2114 return usb3_enable_pipe_n(usb3_ep, desc);
2115 }
2116
2117 static int renesas_usb3_ep_disable(struct usb_ep *_ep)
2118 {
2119 struct renesas_usb3_ep *usb3_ep = usb_ep_to_usb3_ep(_ep);
2120 struct renesas_usb3_request *usb3_req;
2121
2122 do {
2123 usb3_req = usb3_get_request(usb3_ep);
2124 if (!usb3_req)
2125 break;
2126 usb3_dma_try_stop(usb3_ep, usb3_req);
2127 usb3_request_done(usb3_ep, usb3_req, -ESHUTDOWN);
2128 } while (1);
2129
2130 return usb3_disable_pipe_n(usb3_ep);
2131 }
2132
2133 static struct usb_request *__renesas_usb3_ep_alloc_request(gfp_t gfp_flags)
2134 {
2135 struct renesas_usb3_request *usb3_req;
2136
2137 usb3_req = kzalloc(sizeof(struct renesas_usb3_request), gfp_flags);
2138 if (!usb3_req)
2139 return NULL;
2140
2141 INIT_LIST_HEAD(&usb3_req->queue);
2142
2143 return &usb3_req->req;
2144 }
2145
2146 static void __renesas_usb3_ep_free_request(struct usb_request *_req)
2147 {
2148 struct renesas_usb3_request *usb3_req = usb_req_to_usb3_req(_req);
2149
2150 kfree(usb3_req);
2151 }
2152
2153 static struct usb_request *renesas_usb3_ep_alloc_request(struct usb_ep *_ep,
2154 gfp_t gfp_flags)
2155 {
2156 return __renesas_usb3_ep_alloc_request(gfp_flags);
2157 }
2158
2159 static void renesas_usb3_ep_free_request(struct usb_ep *_ep,
2160 struct usb_request *_req)
2161 {
2162 __renesas_usb3_ep_free_request(_req);
2163 }
2164
2165 static int renesas_usb3_ep_dequeue(struct usb_ep *_ep, struct usb_request *_req)
2166 {
2167 struct renesas_usb3_ep *usb3_ep = usb_ep_to_usb3_ep(_ep);
2168 struct renesas_usb3_request *usb3_req = usb_req_to_usb3_req(_req);
2169 struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
2170
2171 dev_dbg(usb3_to_dev(usb3), "ep_dequeue: ep%2d, %u\n", usb3_ep->num,
2172 _req->length);
2173
2174 usb3_dma_try_stop(usb3_ep, usb3_req);
2175 usb3_request_done_pipen(usb3, usb3_ep, usb3_req, -ECONNRESET);
2176
2177 return 0;
2178 }
2179
2180 static int renesas_usb3_ep_set_halt(struct usb_ep *_ep, int value)
2181 {
2182 return usb3_set_halt(usb_ep_to_usb3_ep(_ep), !!value, false);
2183 }
2184
2185 static int renesas_usb3_ep_set_wedge(struct usb_ep *_ep)
2186 {
2187 struct renesas_usb3_ep *usb3_ep = usb_ep_to_usb3_ep(_ep);
2188
2189 usb3_ep->wedge = true;
2190 return usb3_set_halt(usb3_ep, true, false);
2191 }
2192
2193 static void renesas_usb3_ep_fifo_flush(struct usb_ep *_ep)
2194 {
2195 struct renesas_usb3_ep *usb3_ep = usb_ep_to_usb3_ep(_ep);
2196 struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
2197 unsigned long flags;
2198
2199 if (usb3_ep->num) {
2200 spin_lock_irqsave(&usb3->lock, flags);
2201 if (!usb3_pn_change(usb3, usb3_ep->num)) {
2202 usb3_pn_con_clear(usb3);
2203 usb3_set_bit(usb3, PN_CON_EN, USB3_PN_CON);
2204 }
2205 spin_unlock_irqrestore(&usb3->lock, flags);
2206 } else {
2207 usb3_p0_con_clear_buffer(usb3);
2208 }
2209 }
2210
2211 static const struct usb_ep_ops renesas_usb3_ep_ops = {
2212 .enable = renesas_usb3_ep_enable,
2213 .disable = renesas_usb3_ep_disable,
2214
2215 .alloc_request = renesas_usb3_ep_alloc_request,
2216 .free_request = renesas_usb3_ep_free_request,
2217
2218 .queue = renesas_usb3_ep_queue,
2219 .dequeue = renesas_usb3_ep_dequeue,
2220
2221 .set_halt = renesas_usb3_ep_set_halt,
2222 .set_wedge = renesas_usb3_ep_set_wedge,
2223 .fifo_flush = renesas_usb3_ep_fifo_flush,
2224 };
2225
2226 /*------- usb_gadget_ops -------------------------------------------------*/
2227 static int renesas_usb3_start(struct usb_gadget *gadget,
2228 struct usb_gadget_driver *driver)
2229 {
2230 struct renesas_usb3 *usb3;
2231
2232 if (!driver || driver->max_speed < USB_SPEED_FULL ||
2233 !driver->setup)
2234 return -EINVAL;
2235
2236 usb3 = gadget_to_renesas_usb3(gadget);
2237
2238 /* hook up the driver */
2239 usb3->driver = driver;
2240
2241 if (usb3->phy)
2242 phy_init(usb3->phy);
2243
2244 pm_runtime_get_sync(usb3_to_dev(usb3));
2245
2246 renesas_usb3_init_controller(usb3);
2247
2248 return 0;
2249 }
2250
2251 static int renesas_usb3_stop(struct usb_gadget *gadget)
2252 {
2253 struct renesas_usb3 *usb3 = gadget_to_renesas_usb3(gadget);
2254
2255 usb3->softconnect = false;
2256 usb3->gadget.speed = USB_SPEED_UNKNOWN;
2257 usb3->driver = NULL;
2258 renesas_usb3_stop_controller(usb3);
2259
2260 if (usb3->phy)
2261 phy_exit(usb3->phy);
2262
2263 pm_runtime_put(usb3_to_dev(usb3));
2264
2265 return 0;
2266 }
2267
2268 static int renesas_usb3_get_frame(struct usb_gadget *_gadget)
2269 {
2270 return -EOPNOTSUPP;
2271 }
2272
2273 static int renesas_usb3_pullup(struct usb_gadget *gadget, int is_on)
2274 {
2275 struct renesas_usb3 *usb3 = gadget_to_renesas_usb3(gadget);
2276
2277 usb3->softconnect = !!is_on;
2278
2279 return 0;
2280 }
2281
2282 static int renesas_usb3_set_selfpowered(struct usb_gadget *gadget, int is_self)
2283 {
2284 gadget->is_selfpowered = !!is_self;
2285
2286 return 0;
2287 }
2288
2289 static const struct usb_gadget_ops renesas_usb3_gadget_ops = {
2290 .get_frame = renesas_usb3_get_frame,
2291 .udc_start = renesas_usb3_start,
2292 .udc_stop = renesas_usb3_stop,
2293 .pullup = renesas_usb3_pullup,
2294 .set_selfpowered = renesas_usb3_set_selfpowered,
2295 };
2296
2297 static ssize_t role_store(struct device *dev, struct device_attribute *attr,
2298 const char *buf, size_t count)
2299 {
2300 struct renesas_usb3 *usb3 = dev_get_drvdata(dev);
2301 bool new_mode_is_host;
2302
2303 if (!usb3->driver)
2304 return -ENODEV;
2305
2306 if (usb3->forced_b_device)
2307 return -EBUSY;
2308
2309 if (!strncmp(buf, "host", strlen("host")))
2310 new_mode_is_host = true;
2311 else if (!strncmp(buf, "peripheral", strlen("peripheral")))
2312 new_mode_is_host = false;
2313 else
2314 return -EINVAL;
2315
2316 if (new_mode_is_host == usb3_is_host(usb3))
2317 return -EINVAL;
2318
2319 usb3_mode_config(usb3, new_mode_is_host, usb3_is_a_device(usb3));
2320
2321 return count;
2322 }
2323
2324 static ssize_t role_show(struct device *dev, struct device_attribute *attr,
2325 char *buf)
2326 {
2327 struct renesas_usb3 *usb3 = dev_get_drvdata(dev);
2328
2329 if (!usb3->driver)
2330 return -ENODEV;
2331
2332 return sprintf(buf, "%s\n", usb3_is_host(usb3) ? "host" : "peripheral");
2333 }
2334 static DEVICE_ATTR_RW(role);
2335
2336 static int renesas_usb3_b_device_show(struct seq_file *s, void *unused)
2337 {
2338 struct renesas_usb3 *usb3 = s->private;
2339
2340 seq_printf(s, "%d\n", usb3->forced_b_device);
2341
2342 return 0;
2343 }
2344
2345 static int renesas_usb3_b_device_open(struct inode *inode, struct file *file)
2346 {
2347 return single_open(file, renesas_usb3_b_device_show, inode->i_private);
2348 }
2349
2350 static ssize_t renesas_usb3_b_device_write(struct file *file,
2351 const char __user *ubuf,
2352 size_t count, loff_t *ppos)
2353 {
2354 struct seq_file *s = file->private_data;
2355 struct renesas_usb3 *usb3 = s->private;
2356 char buf[32];
2357
2358 if (!usb3->driver)
2359 return -ENODEV;
2360
2361 if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
2362 return -EFAULT;
2363
2364 if (!strncmp(buf, "1", 1))
2365 usb3->forced_b_device = true;
2366 else
2367 usb3->forced_b_device = false;
2368
2369 /* Let this driver call usb3_connect() anyway */
2370 usb3_check_id(usb3);
2371
2372 return count;
2373 }
2374
2375 static const struct file_operations renesas_usb3_b_device_fops = {
2376 .open = renesas_usb3_b_device_open,
2377 .write = renesas_usb3_b_device_write,
2378 .read = seq_read,
2379 .llseek = seq_lseek,
2380 .release = single_release,
2381 };
2382
2383 static void renesas_usb3_debugfs_init(struct renesas_usb3 *usb3,
2384 struct device *dev)
2385 {
2386 struct dentry *root, *file;
2387
2388 root = debugfs_create_dir(dev_name(dev), NULL);
2389 if (IS_ERR_OR_NULL(root)) {
2390 dev_info(dev, "%s: Can't create the root\n", __func__);
2391 return;
2392 }
2393
2394 file = debugfs_create_file("b_device", 0644, root, usb3,
2395 &renesas_usb3_b_device_fops);
2396 if (!file)
2397 dev_info(dev, "%s: Can't create debugfs mode\n", __func__);
2398 }
2399
2400 /*------- platform_driver ------------------------------------------------*/
2401 static int renesas_usb3_remove(struct platform_device *pdev)
2402 {
2403 struct renesas_usb3 *usb3 = platform_get_drvdata(pdev);
2404
2405 device_remove_file(&pdev->dev, &dev_attr_role);
2406
2407 usb_del_gadget_udc(&usb3->gadget);
2408 renesas_usb3_dma_free_prd(usb3, &pdev->dev);
2409
2410 __renesas_usb3_ep_free_request(usb3->ep0_req);
2411 if (usb3->phy)
2412 phy_put(usb3->phy);
2413 pm_runtime_disable(usb3_to_dev(usb3));
2414
2415 return 0;
2416 }
2417
2418 static int renesas_usb3_init_ep(struct renesas_usb3 *usb3, struct device *dev,
2419 const struct renesas_usb3_priv *priv)
2420 {
2421 struct renesas_usb3_ep *usb3_ep;
2422 int i;
2423
2424 /* calculate num_usb3_eps from renesas_usb3_priv */
2425 usb3->num_usb3_eps = priv->ramsize_per_ramif * priv->num_ramif * 2 /
2426 priv->ramsize_per_pipe + 1;
2427
2428 if (usb3->num_usb3_eps > USB3_MAX_NUM_PIPES)
2429 usb3->num_usb3_eps = USB3_MAX_NUM_PIPES;
2430
2431 usb3->usb3_ep = devm_kzalloc(dev, sizeof(*usb3_ep) * usb3->num_usb3_eps,
2432 GFP_KERNEL);
2433 if (!usb3->usb3_ep)
2434 return -ENOMEM;
2435
2436 dev_dbg(dev, "%s: num_usb3_eps = %d\n", __func__, usb3->num_usb3_eps);
2437 /*
2438 * This driver prepares pipes as follows:
2439 * - odd pipes = IN pipe
2440 * - even pipes = OUT pipe (except pipe 0)
2441 */
2442 usb3_for_each_ep(usb3_ep, usb3, i) {
2443 snprintf(usb3_ep->ep_name, sizeof(usb3_ep->ep_name), "ep%d", i);
2444 usb3_ep->usb3 = usb3;
2445 usb3_ep->num = i;
2446 usb3_ep->ep.name = usb3_ep->ep_name;
2447 usb3_ep->ep.ops = &renesas_usb3_ep_ops;
2448 INIT_LIST_HEAD(&usb3_ep->queue);
2449 INIT_LIST_HEAD(&usb3_ep->ep.ep_list);
2450 if (!i) {
2451 /* for control pipe */
2452 usb3->gadget.ep0 = &usb3_ep->ep;
2453 usb_ep_set_maxpacket_limit(&usb3_ep->ep,
2454 USB3_EP0_HSFS_MAX_PACKET_SIZE);
2455 usb3_ep->ep.caps.type_control = true;
2456 usb3_ep->ep.caps.dir_in = true;
2457 usb3_ep->ep.caps.dir_out = true;
2458 continue;
2459 }
2460
2461 /* for bulk or interrupt pipe */
2462 usb_ep_set_maxpacket_limit(&usb3_ep->ep, ~0);
2463 list_add_tail(&usb3_ep->ep.ep_list, &usb3->gadget.ep_list);
2464 usb3_ep->ep.caps.type_bulk = true;
2465 usb3_ep->ep.caps.type_int = true;
2466 if (i & 1)
2467 usb3_ep->ep.caps.dir_in = true;
2468 else
2469 usb3_ep->ep.caps.dir_out = true;
2470 }
2471
2472 return 0;
2473 }
2474
2475 static void renesas_usb3_init_ram(struct renesas_usb3 *usb3, struct device *dev,
2476 const struct renesas_usb3_priv *priv)
2477 {
2478 struct renesas_usb3_ep *usb3_ep;
2479 int i;
2480 u32 ramif[2], basead[2]; /* index 0 = for IN pipes */
2481 u32 *cur_ramif, *cur_basead;
2482 u32 val;
2483
2484 memset(ramif, 0, sizeof(ramif));
2485 memset(basead, 0, sizeof(basead));
2486
2487 /*
2488 * This driver prepares pipes as follows:
2489 * - all pipes = the same size as "ramsize_per_pipe"
2490 * Please refer to the "Method of Specifying RAM Mapping"
2491 */
2492 usb3_for_each_ep(usb3_ep, usb3, i) {
2493 if (!i)
2494 continue; /* out of scope if ep num = 0 */
2495 if (usb3_ep->ep.caps.dir_in) {
2496 cur_ramif = &ramif[0];
2497 cur_basead = &basead[0];
2498 } else {
2499 cur_ramif = &ramif[1];
2500 cur_basead = &basead[1];
2501 }
2502
2503 if (*cur_basead > priv->ramsize_per_ramif)
2504 continue; /* out of memory for IN or OUT pipe */
2505
2506 /* calculate rammap_val */
2507 val = PN_RAMMAP_RAMIF(*cur_ramif);
2508 val |= usb3_calc_ramarea(priv->ramsize_per_pipe);
2509 val |= PN_RAMMAP_BASEAD(*cur_basead);
2510 usb3_ep->rammap_val = val;
2511
2512 dev_dbg(dev, "ep%2d: val = %08x, ramif = %d, base = %x\n",
2513 i, val, *cur_ramif, *cur_basead);
2514
2515 /* update current ramif */
2516 if (*cur_ramif + 1 == priv->num_ramif) {
2517 *cur_ramif = 0;
2518 *cur_basead += priv->ramsize_per_pipe;
2519 } else {
2520 (*cur_ramif)++;
2521 }
2522 }
2523 }
2524
2525 static const struct renesas_usb3_priv renesas_usb3_priv_r8a7795_es1 = {
2526 .ramsize_per_ramif = SZ_16K,
2527 .num_ramif = 2,
2528 .ramsize_per_pipe = SZ_4K,
2529 .workaround_for_vbus = true,
2530 };
2531
2532 static const struct renesas_usb3_priv renesas_usb3_priv_gen3 = {
2533 .ramsize_per_ramif = SZ_16K,
2534 .num_ramif = 4,
2535 .ramsize_per_pipe = SZ_4K,
2536 };
2537
2538 static const struct of_device_id usb3_of_match[] = {
2539 {
2540 .compatible = "renesas,r8a7795-usb3-peri",
2541 .data = &renesas_usb3_priv_gen3,
2542 },
2543 {
2544 .compatible = "renesas,rcar-gen3-usb3-peri",
2545 .data = &renesas_usb3_priv_gen3,
2546 },
2547 { },
2548 };
2549 MODULE_DEVICE_TABLE(of, usb3_of_match);
2550
2551 static const struct soc_device_attribute renesas_usb3_quirks_match[] = {
2552 {
2553 .soc_id = "r8a7795", .revision = "ES1.*",
2554 .data = &renesas_usb3_priv_r8a7795_es1,
2555 },
2556 { /* sentinel */ },
2557 };
2558
2559 static const unsigned int renesas_usb3_cable[] = {
2560 EXTCON_USB,
2561 EXTCON_USB_HOST,
2562 EXTCON_NONE,
2563 };
2564
2565 static int renesas_usb3_probe(struct platform_device *pdev)
2566 {
2567 struct renesas_usb3 *usb3;
2568 struct resource *res;
2569 int irq, ret;
2570 const struct renesas_usb3_priv *priv;
2571 const struct soc_device_attribute *attr;
2572
2573 attr = soc_device_match(renesas_usb3_quirks_match);
2574 if (attr)
2575 priv = attr->data;
2576 else
2577 priv = of_device_get_match_data(&pdev->dev);
2578
2579 irq = platform_get_irq(pdev, 0);
2580 if (irq < 0) {
2581 dev_err(&pdev->dev, "Failed to get IRQ: %d\n", irq);
2582 return irq;
2583 }
2584
2585 usb3 = devm_kzalloc(&pdev->dev, sizeof(*usb3), GFP_KERNEL);
2586 if (!usb3)
2587 return -ENOMEM;
2588
2589 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2590 usb3->reg = devm_ioremap_resource(&pdev->dev, res);
2591 if (IS_ERR(usb3->reg))
2592 return PTR_ERR(usb3->reg);
2593
2594 platform_set_drvdata(pdev, usb3);
2595 spin_lock_init(&usb3->lock);
2596
2597 usb3->gadget.ops = &renesas_usb3_gadget_ops;
2598 usb3->gadget.name = udc_name;
2599 usb3->gadget.max_speed = USB_SPEED_SUPER;
2600 INIT_LIST_HEAD(&usb3->gadget.ep_list);
2601 ret = renesas_usb3_init_ep(usb3, &pdev->dev, priv);
2602 if (ret < 0)
2603 return ret;
2604 renesas_usb3_init_ram(usb3, &pdev->dev, priv);
2605
2606 ret = devm_request_irq(&pdev->dev, irq, renesas_usb3_irq, 0,
2607 dev_name(&pdev->dev), usb3);
2608 if (ret < 0)
2609 return ret;
2610
2611 INIT_WORK(&usb3->extcon_work, renesas_usb3_extcon_work);
2612 usb3->extcon = devm_extcon_dev_allocate(&pdev->dev, renesas_usb3_cable);
2613 if (IS_ERR(usb3->extcon))
2614 return PTR_ERR(usb3->extcon);
2615
2616 ret = devm_extcon_dev_register(&pdev->dev, usb3->extcon);
2617 if (ret < 0) {
2618 dev_err(&pdev->dev, "Failed to register extcon\n");
2619 return ret;
2620 }
2621
2622 /* for ep0 handling */
2623 usb3->ep0_req = __renesas_usb3_ep_alloc_request(GFP_KERNEL);
2624 if (!usb3->ep0_req)
2625 return -ENOMEM;
2626
2627 ret = renesas_usb3_dma_alloc_prd(usb3, &pdev->dev);
2628 if (ret < 0)
2629 goto err_alloc_prd;
2630
2631 ret = usb_add_gadget_udc(&pdev->dev, &usb3->gadget);
2632 if (ret < 0)
2633 goto err_add_udc;
2634
2635 ret = device_create_file(&pdev->dev, &dev_attr_role);
2636 if (ret < 0)
2637 goto err_dev_create;
2638
2639 /*
2640 * This is an optional. So, if this driver cannot get a phy,
2641 * this driver will not handle a phy anymore.
2642 */
2643 usb3->phy = devm_phy_get(&pdev->dev, "usb");
2644 if (IS_ERR(usb3->phy))
2645 usb3->phy = NULL;
2646
2647 usb3->workaround_for_vbus = priv->workaround_for_vbus;
2648
2649 renesas_usb3_debugfs_init(usb3, &pdev->dev);
2650
2651 dev_info(&pdev->dev, "probed%s\n", usb3->phy ? " with phy" : "");
2652 pm_runtime_enable(usb3_to_dev(usb3));
2653
2654 return 0;
2655
2656 err_dev_create:
2657 usb_del_gadget_udc(&usb3->gadget);
2658
2659 err_add_udc:
2660 renesas_usb3_dma_free_prd(usb3, &pdev->dev);
2661
2662 err_alloc_prd:
2663 __renesas_usb3_ep_free_request(usb3->ep0_req);
2664
2665 return ret;
2666 }
2667
2668 #ifdef CONFIG_PM_SLEEP
2669 static int renesas_usb3_suspend(struct device *dev)
2670 {
2671 struct renesas_usb3 *usb3 = dev_get_drvdata(dev);
2672
2673 /* Not started */
2674 if (!usb3->driver)
2675 return 0;
2676
2677 renesas_usb3_stop_controller(usb3);
2678 if (usb3->phy)
2679 phy_exit(usb3->phy);
2680 pm_runtime_put(dev);
2681
2682 return 0;
2683 }
2684
2685 static int renesas_usb3_resume(struct device *dev)
2686 {
2687 struct renesas_usb3 *usb3 = dev_get_drvdata(dev);
2688
2689 /* Not started */
2690 if (!usb3->driver)
2691 return 0;
2692
2693 if (usb3->phy)
2694 phy_init(usb3->phy);
2695 pm_runtime_get_sync(dev);
2696 renesas_usb3_init_controller(usb3);
2697
2698 return 0;
2699 }
2700 #endif
2701
2702 static SIMPLE_DEV_PM_OPS(renesas_usb3_pm_ops, renesas_usb3_suspend,
2703 renesas_usb3_resume);
2704
2705 static struct platform_driver renesas_usb3_driver = {
2706 .probe = renesas_usb3_probe,
2707 .remove = renesas_usb3_remove,
2708 .driver = {
2709 .name = (char *)udc_name,
2710 .pm = &renesas_usb3_pm_ops,
2711 .of_match_table = of_match_ptr(usb3_of_match),
2712 },
2713 };
2714 module_platform_driver(renesas_usb3_driver);
2715
2716 MODULE_DESCRIPTION("Renesas USB3.0 Peripheral driver");
2717 MODULE_LICENSE("GPL v2");
2718 MODULE_AUTHOR("Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>");
2719 MODULE_ALIAS("platform:renesas_usb3");
CRIS linux kernel tree