2 * Renesas USB3.0 Peripheral driver (USB gadget)
4 * Copyright (C) 2015 Renesas Electronics Corporation
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.
11 #include <linux/delay.h>
12 #include <linux/dma-mapping.h>
13 #include <linux/err.h>
14 #include <linux/extcon.h>
15 #include <linux/interrupt.h>
17 #include <linux/module.h>
18 #include <linux/of_device.h>
19 #include <linux/platform_device.h>
20 #include <linux/pm_runtime.h>
21 #include <linux/sizes.h>
22 #include <linux/slab.h>
23 #include <linux/usb/ch9.h>
24 #include <linux/usb/gadget.h>
26 /* register definitions */
27 #define USB3_AXI_INT_STA 0x008
28 #define USB3_AXI_INT_ENA 0x00c
29 #define USB3_DMA_INT_STA 0x010
30 #define USB3_DMA_INT_ENA 0x014
31 #define USB3_DMA_CH0_CON(n) (0x030 + ((n) - 1) * 0x10) /* n = 1 to 4 */
32 #define USB3_DMA_CH0_PRD_ADR(n) (0x034 + ((n) - 1) * 0x10) /* n = 1 to 4 */
33 #define USB3_USB_COM_CON 0x200
34 #define USB3_USB20_CON 0x204
35 #define USB3_USB30_CON 0x208
36 #define USB3_USB_STA 0x210
37 #define USB3_DRD_CON 0x218
38 #define USB3_USB_INT_STA_1 0x220
39 #define USB3_USB_INT_STA_2 0x224
40 #define USB3_USB_INT_ENA_1 0x228
41 #define USB3_USB_INT_ENA_2 0x22c
42 #define USB3_STUP_DAT_0 0x230
43 #define USB3_STUP_DAT_1 0x234
44 #define USB3_USB_OTG_STA 0x268
45 #define USB3_USB_OTG_INT_STA 0x26c
46 #define USB3_USB_OTG_INT_ENA 0x270
47 #define USB3_P0_MOD 0x280
48 #define USB3_P0_CON 0x288
49 #define USB3_P0_STA 0x28c
50 #define USB3_P0_INT_STA 0x290
51 #define USB3_P0_INT_ENA 0x294
52 #define USB3_P0_LNG 0x2a0
53 #define USB3_P0_READ 0x2a4
54 #define USB3_P0_WRITE 0x2a8
55 #define USB3_PIPE_COM 0x2b0
56 #define USB3_PN_MOD 0x2c0
57 #define USB3_PN_RAMMAP 0x2c4
58 #define USB3_PN_CON 0x2c8
59 #define USB3_PN_STA 0x2cc
60 #define USB3_PN_INT_STA 0x2d0
61 #define USB3_PN_INT_ENA 0x2d4
62 #define USB3_PN_LNG 0x2e0
63 #define USB3_PN_READ 0x2e4
64 #define USB3_PN_WRITE 0x2e8
65 #define USB3_SSIFCMD 0x340
67 /* AXI_INT_ENA and AXI_INT_STA */
68 #define AXI_INT_DMAINT BIT(31)
69 #define AXI_INT_EPCINT BIT(30)
70 /* PRD's n = from 1 to 4 */
71 #define AXI_INT_PRDEN_CLR_STA_SHIFT(n) (16 + (n) - 1)
72 #define AXI_INT_PRDERR_STA_SHIFT(n) (0 + (n) - 1)
73 #define AXI_INT_PRDEN_CLR_STA(n) (1 << AXI_INT_PRDEN_CLR_STA_SHIFT(n))
74 #define AXI_INT_PRDERR_STA(n) (1 << AXI_INT_PRDERR_STA_SHIFT(n))
76 /* DMA_INT_ENA and DMA_INT_STA */
77 #define DMA_INT(n) BIT(n)
80 #define DMA_CON_PIPE_DIR BIT(15) /* 1: In Transfer */
81 #define DMA_CON_PIPE_NO_SHIFT 8
82 #define DMA_CON_PIPE_NO_MASK GENMASK(12, DMA_CON_PIPE_NO_SHIFT)
83 #define DMA_COM_PIPE_NO(n) (((n) << DMA_CON_PIPE_NO_SHIFT) & \
85 #define DMA_CON_PRD_EN BIT(0)
88 #define LCLKSEL_LSEL BIT(18)
91 #define USB_COM_CON_CONF BIT(24)
92 #define USB_COM_CON_PN_WDATAIF_NL BIT(23)
93 #define USB_COM_CON_PN_RDATAIF_NL BIT(22)
94 #define USB_COM_CON_PN_LSTTR_PP BIT(21)
95 #define USB_COM_CON_SPD_MODE BIT(17)
96 #define USB_COM_CON_EP0_EN BIT(16)
97 #define USB_COM_CON_DEV_ADDR_SHIFT 8
98 #define USB_COM_CON_DEV_ADDR_MASK GENMASK(14, USB_COM_CON_DEV_ADDR_SHIFT)
99 #define USB_COM_CON_DEV_ADDR(n) (((n) << USB_COM_CON_DEV_ADDR_SHIFT) & \
100 USB_COM_CON_DEV_ADDR_MASK)
101 #define USB_COM_CON_RX_DETECTION BIT(1)
102 #define USB_COM_CON_PIPE_CLR BIT(0)
105 #define USB20_CON_B2_PUE BIT(31)
106 #define USB20_CON_B2_SUSPEND BIT(24)
107 #define USB20_CON_B2_CONNECT BIT(17)
108 #define USB20_CON_B2_TSTMOD_SHIFT 8
109 #define USB20_CON_B2_TSTMOD_MASK GENMASK(10, USB20_CON_B2_TSTMOD_SHIFT)
110 #define USB20_CON_B2_TSTMOD(n) (((n) << USB20_CON_B2_TSTMOD_SHIFT) & \
111 USB20_CON_B2_TSTMOD_MASK)
112 #define USB20_CON_B2_TSTMOD_EN BIT(0)
115 #define USB30_CON_POW_SEL_SHIFT 24
116 #define USB30_CON_POW_SEL_MASK GENMASK(26, USB30_CON_POW_SEL_SHIFT)
117 #define USB30_CON_POW_SEL_IN_U3 BIT(26)
118 #define USB30_CON_POW_SEL_IN_DISCON 0
119 #define USB30_CON_POW_SEL_P2_TO_P0 BIT(25)
120 #define USB30_CON_POW_SEL_P0_TO_P3 BIT(24)
121 #define USB30_CON_POW_SEL_P0_TO_P2 0
122 #define USB30_CON_B3_PLLWAKE BIT(23)
123 #define USB30_CON_B3_CONNECT BIT(17)
124 #define USB30_CON_B3_HOTRST_CMP BIT(1)
127 #define USB_STA_SPEED_MASK (BIT(2) | BIT(1))
128 #define USB_STA_SPEED_HS BIT(2)
129 #define USB_STA_SPEED_FS BIT(1)
130 #define USB_STA_SPEED_SS 0
131 #define USB_STA_VBUS_STA BIT(0)
134 #define DRD_CON_PERI_CON BIT(24)
135 #define DRD_CON_VBOUT BIT(0)
137 /* USB_INT_ENA_1 and USB_INT_STA_1 */
138 #define USB_INT_1_B3_PLLWKUP BIT(31)
139 #define USB_INT_1_B3_LUPSUCS BIT(30)
140 #define USB_INT_1_B3_DISABLE BIT(27)
141 #define USB_INT_1_B3_WRMRST BIT(21)
142 #define USB_INT_1_B3_HOTRST BIT(20)
143 #define USB_INT_1_B2_USBRST BIT(12)
144 #define USB_INT_1_B2_L1SPND BIT(11)
145 #define USB_INT_1_B2_SPND BIT(9)
146 #define USB_INT_1_B2_RSUM BIT(8)
147 #define USB_INT_1_SPEED BIT(1)
148 #define USB_INT_1_VBUS_CNG BIT(0)
150 /* USB_INT_ENA_2 and USB_INT_STA_2 */
151 #define USB_INT_2_PIPE(n) BIT(n)
153 /* USB_OTG_STA, USB_OTG_INT_STA and USB_OTG_INT_ENA */
154 #define USB_OTG_IDMON BIT(4)
157 #define P0_MOD_DIR BIT(6)
159 /* P0_CON and PN_CON */
160 #define PX_CON_BYTE_EN_MASK (BIT(10) | BIT(9))
161 #define PX_CON_BYTE_EN_SHIFT 9
162 #define PX_CON_BYTE_EN_BYTES(n) (((n) << PX_CON_BYTE_EN_SHIFT) & \
164 #define PX_CON_SEND BIT(8)
167 #define P0_CON_ST_RES_MASK (BIT(27) | BIT(26))
168 #define P0_CON_ST_RES_FORCE_STALL BIT(27)
169 #define P0_CON_ST_RES_NORMAL BIT(26)
170 #define P0_CON_ST_RES_FORCE_NRDY 0
171 #define P0_CON_OT_RES_MASK (BIT(25) | BIT(24))
172 #define P0_CON_OT_RES_FORCE_STALL BIT(25)
173 #define P0_CON_OT_RES_NORMAL BIT(24)
174 #define P0_CON_OT_RES_FORCE_NRDY 0
175 #define P0_CON_IN_RES_MASK (BIT(17) | BIT(16))
176 #define P0_CON_IN_RES_FORCE_STALL BIT(17)
177 #define P0_CON_IN_RES_NORMAL BIT(16)
178 #define P0_CON_IN_RES_FORCE_NRDY 0
179 #define P0_CON_RES_WEN BIT(7)
180 #define P0_CON_BCLR BIT(1)
182 /* P0_STA and PN_STA */
183 #define PX_STA_BUFSTS BIT(0)
185 /* P0_INT_ENA and P0_INT_STA */
186 #define P0_INT_STSED BIT(18)
187 #define P0_INT_STSST BIT(17)
188 #define P0_INT_SETUP BIT(16)
189 #define P0_INT_RCVNL BIT(8)
190 #define P0_INT_ERDY BIT(7)
191 #define P0_INT_FLOW BIT(6)
192 #define P0_INT_STALL BIT(2)
193 #define P0_INT_NRDY BIT(1)
194 #define P0_INT_BFRDY BIT(0)
195 #define P0_INT_ALL_BITS (P0_INT_STSED | P0_INT_SETUP | P0_INT_BFRDY)
198 #define PN_MOD_DIR BIT(6)
199 #define PN_MOD_TYPE_SHIFT 4
200 #define PN_MOD_TYPE_MASK GENMASK(5, PN_MOD_TYPE_SHIFT)
201 #define PN_MOD_TYPE(n) (((n) << PN_MOD_TYPE_SHIFT) & \
203 #define PN_MOD_EPNUM_MASK GENMASK(3, 0)
204 #define PN_MOD_EPNUM(n) ((n) & PN_MOD_EPNUM_MASK)
207 #define PN_RAMMAP_RAMAREA_SHIFT 29
208 #define PN_RAMMAP_RAMAREA_MASK GENMASK(31, PN_RAMMAP_RAMAREA_SHIFT)
209 #define PN_RAMMAP_RAMAREA_16KB BIT(31)
210 #define PN_RAMMAP_RAMAREA_8KB (BIT(30) | BIT(29))
211 #define PN_RAMMAP_RAMAREA_4KB BIT(30)
212 #define PN_RAMMAP_RAMAREA_2KB BIT(29)
213 #define PN_RAMMAP_RAMAREA_1KB 0
214 #define PN_RAMMAP_MPKT_SHIFT 16
215 #define PN_RAMMAP_MPKT_MASK GENMASK(26, PN_RAMMAP_MPKT_SHIFT)
216 #define PN_RAMMAP_MPKT(n) (((n) << PN_RAMMAP_MPKT_SHIFT) & \
218 #define PN_RAMMAP_RAMIF_SHIFT 14
219 #define PN_RAMMAP_RAMIF_MASK GENMASK(15, PN_RAMMAP_RAMIF_SHIFT)
220 #define PN_RAMMAP_RAMIF(n) (((n) << PN_RAMMAP_RAMIF_SHIFT) & \
221 PN_RAMMAP_RAMIF_MASK)
222 #define PN_RAMMAP_BASEAD_MASK GENMASK(13, 0)
223 #define PN_RAMMAP_BASEAD(offs) (((offs) >> 3) & PN_RAMMAP_BASEAD_MASK)
224 #define PN_RAMMAP_DATA(area, ramif, basead) ((PN_RAMMAP_##area) | \
225 (PN_RAMMAP_RAMIF(ramif)) | \
226 (PN_RAMMAP_BASEAD(basead)))
229 #define PN_CON_EN BIT(31)
230 #define PN_CON_DATAIF_EN BIT(30)
231 #define PN_CON_RES_MASK (BIT(17) | BIT(16))
232 #define PN_CON_RES_FORCE_STALL BIT(17)
233 #define PN_CON_RES_NORMAL BIT(16)
234 #define PN_CON_RES_FORCE_NRDY 0
235 #define PN_CON_LAST BIT(11)
236 #define PN_CON_RES_WEN BIT(7)
237 #define PN_CON_CLR BIT(0)
239 /* PN_INT_STA and PN_INT_ENA */
240 #define PN_INT_LSTTR BIT(4)
241 #define PN_INT_BFRDY BIT(0)
244 #define SSIFCMD_URES_U2 BIT(9)
245 #define SSIFCMD_URES_U1 BIT(8)
246 #define SSIFCMD_UDIR_U2 BIT(7)
247 #define SSIFCMD_UDIR_U1 BIT(6)
248 #define SSIFCMD_UREQ_U2 BIT(5)
249 #define SSIFCMD_UREQ_U1 BIT(4)
251 #define USB3_EP0_SS_MAX_PACKET_SIZE 512
252 #define USB3_EP0_HSFS_MAX_PACKET_SIZE 64
253 #define USB3_EP0_BUF_SIZE 8
254 #define USB3_MAX_NUM_PIPES 30
255 #define USB3_WAIT_US 3
256 #define USB3_DMA_NUM_SETTING_AREA 4
258 * To avoid double-meaning of "0" (xferred 65536 bytes or received zlp if
259 * buffer size is 65536), this driver uses the maximum size per a entry is
262 #define USB3_DMA_MAX_XFER_SIZE 32768
263 #define USB3_DMA_PRD_SIZE 4096
267 /* Physical Region Descriptor Table */
268 struct renesas_usb3_prd {
270 #define USB3_PRD1_E BIT(30) /* the end of chain */
271 #define USB3_PRD1_U BIT(29) /* completion of transfer */
272 #define USB3_PRD1_D BIT(28) /* Error occurred */
273 #define USB3_PRD1_INT BIT(27) /* Interrupt occurred */
274 #define USB3_PRD1_LST BIT(26) /* Last Packet */
275 #define USB3_PRD1_B_INC BIT(24)
276 #define USB3_PRD1_MPS_8 0
277 #define USB3_PRD1_MPS_16 BIT(21)
278 #define USB3_PRD1_MPS_32 BIT(22)
279 #define USB3_PRD1_MPS_64 (BIT(22) | BIT(21))
280 #define USB3_PRD1_MPS_512 BIT(23)
281 #define USB3_PRD1_MPS_1024 (BIT(23) | BIT(21))
282 #define USB3_PRD1_MPS_RESERVED (BIT(23) | BIT(22) | BIT(21))
283 #define USB3_PRD1_SIZE_MASK GENMASK(15, 0)
287 #define USB3_DMA_NUM_PRD_ENTRIES (USB3_DMA_PRD_SIZE / \
288 sizeof(struct renesas_usb3_prd))
289 #define USB3_DMA_MAX_XFER_SIZE_ALL_PRDS (USB3_DMA_PRD_SIZE / \
290 sizeof(struct renesas_usb3_prd) * \
291 USB3_DMA_MAX_XFER_SIZE)
293 struct renesas_usb3_dma {
294 struct renesas_usb3_prd *prd;
296 int num; /* Setting area number (from 1 to 4) */
300 struct renesas_usb3_request {
301 struct usb_request req;
302 struct list_head queue;
305 #define USB3_EP_NAME_SIZE 8
306 struct renesas_usb3_ep {
308 struct renesas_usb3 *usb3;
309 struct renesas_usb3_dma *dma;
311 char ep_name[USB3_EP_NAME_SIZE];
312 struct list_head queue;
320 struct renesas_usb3_priv {
321 int ramsize_per_ramif; /* unit = bytes */
323 int ramsize_per_pipe; /* unit = bytes */
324 bool workaround_for_vbus; /* if true, don't check vbus signal */
327 struct renesas_usb3 {
330 struct usb_gadget gadget;
331 struct usb_gadget_driver *driver;
332 struct extcon_dev *extcon;
333 struct work_struct extcon_work;
335 struct renesas_usb3_ep *usb3_ep;
338 struct renesas_usb3_dma dma[USB3_DMA_NUM_SETTING_AREA];
343 struct usb_request *ep0_req;
345 u8 ep0_buf[USB3_EP0_BUF_SIZE];
347 bool workaround_for_vbus;
348 bool extcon_host; /* check id and set EXTCON_USB_HOST */
349 bool extcon_usb; /* check vbus and set EXTCON_USB */
352 #define gadget_to_renesas_usb3(_gadget) \
353 container_of(_gadget, struct renesas_usb3, gadget)
354 #define renesas_usb3_to_gadget(renesas_usb3) (&renesas_usb3->gadget)
355 #define usb3_to_dev(_usb3) (_usb3->gadget.dev.parent)
357 #define usb_ep_to_usb3_ep(_ep) container_of(_ep, struct renesas_usb3_ep, ep)
358 #define usb3_ep_to_usb3(_usb3_ep) (_usb3_ep->usb3)
359 #define usb_req_to_usb3_req(_req) container_of(_req, \
360 struct renesas_usb3_request, req)
362 #define usb3_get_ep(usb3, n) ((usb3)->usb3_ep + (n))
363 #define usb3_for_each_ep(usb3_ep, usb3, i) \
364 for ((i) = 0, usb3_ep = usb3_get_ep(usb3, (i)); \
365 (i) < (usb3)->num_usb3_eps; \
366 (i)++, usb3_ep = usb3_get_ep(usb3, (i)))
368 #define usb3_get_dma(usb3, i) (&(usb3)->dma[i])
369 #define usb3_for_each_dma(usb3, dma, i) \
370 for ((i) = 0, dma = usb3_get_dma((usb3), (i)); \
371 (i) < USB3_DMA_NUM_SETTING_AREA; \
372 (i)++, dma = usb3_get_dma((usb3), (i)))
374 static const char udc_name[] = "renesas_usb3";
376 static bool use_dma = 1;
377 module_param(use_dma, bool, 0644);
378 MODULE_PARM_DESC(use_dma, "use dedicated DMAC");
380 static void usb3_write(struct renesas_usb3 *usb3, u32 data, u32 offs)
382 iowrite32(data, usb3->reg + offs);
385 static u32 usb3_read(struct renesas_usb3 *usb3, u32 offs)
387 return ioread32(usb3->reg + offs);
390 static void usb3_set_bit(struct renesas_usb3 *usb3, u32 bits, u32 offs)
392 u32 val = usb3_read(usb3, offs);
395 usb3_write(usb3, val, offs);
398 static void usb3_clear_bit(struct renesas_usb3 *usb3, u32 bits, u32 offs)
400 u32 val = usb3_read(usb3, offs);
403 usb3_write(usb3, val, offs);
406 static int usb3_wait(struct renesas_usb3 *usb3, u32 reg, u32 mask,
411 for (i = 0; i < USB3_WAIT_US; i++) {
412 if ((usb3_read(usb3, reg) & mask) == expected)
417 dev_dbg(usb3_to_dev(usb3), "%s: timed out (%8x, %08x, %08x)\n",
418 __func__, reg, mask, expected);
423 static void renesas_usb3_extcon_work(struct work_struct *work)
425 struct renesas_usb3 *usb3 = container_of(work, struct renesas_usb3,
428 extcon_set_state_sync(usb3->extcon, EXTCON_USB_HOST, usb3->extcon_host);
429 extcon_set_state_sync(usb3->extcon, EXTCON_USB, usb3->extcon_usb);
432 static void usb3_enable_irq_1(struct renesas_usb3 *usb3, u32 bits)
434 usb3_set_bit(usb3, bits, USB3_USB_INT_ENA_1);
437 static void usb3_disable_irq_1(struct renesas_usb3 *usb3, u32 bits)
439 usb3_clear_bit(usb3, bits, USB3_USB_INT_ENA_1);
442 static void usb3_enable_pipe_irq(struct renesas_usb3 *usb3, int num)
444 usb3_set_bit(usb3, USB_INT_2_PIPE(num), USB3_USB_INT_ENA_2);
447 static void usb3_disable_pipe_irq(struct renesas_usb3 *usb3, int num)
449 usb3_clear_bit(usb3, USB_INT_2_PIPE(num), USB3_USB_INT_ENA_2);
452 static bool usb3_is_host(struct renesas_usb3 *usb3)
454 return !(usb3_read(usb3, USB3_DRD_CON) & DRD_CON_PERI_CON);
457 static void usb3_init_axi_bridge(struct renesas_usb3 *usb3)
460 usb3_write(usb3, ~0, USB3_DMA_INT_STA);
461 usb3_write(usb3, 0, USB3_DMA_INT_ENA);
462 usb3_set_bit(usb3, AXI_INT_DMAINT | AXI_INT_EPCINT, USB3_AXI_INT_ENA);
465 static void usb3_init_epc_registers(struct renesas_usb3 *usb3)
467 usb3_write(usb3, ~0, USB3_USB_INT_STA_1);
468 usb3_enable_irq_1(usb3, USB_INT_1_VBUS_CNG);
471 static bool usb3_wakeup_usb2_phy(struct renesas_usb3 *usb3)
473 if (!(usb3_read(usb3, USB3_USB20_CON) & USB20_CON_B2_SUSPEND))
474 return true; /* already waked it up */
476 usb3_clear_bit(usb3, USB20_CON_B2_SUSPEND, USB3_USB20_CON);
477 usb3_enable_irq_1(usb3, USB_INT_1_B2_RSUM);
482 static void usb3_usb2_pullup(struct renesas_usb3 *usb3, int pullup)
484 u32 bits = USB20_CON_B2_PUE | USB20_CON_B2_CONNECT;
486 if (usb3->softconnect && pullup)
487 usb3_set_bit(usb3, bits, USB3_USB20_CON);
489 usb3_clear_bit(usb3, bits, USB3_USB20_CON);
492 static void usb3_set_test_mode(struct renesas_usb3 *usb3)
494 u32 val = usb3_read(usb3, USB3_USB20_CON);
496 val &= ~USB20_CON_B2_TSTMOD_MASK;
497 val |= USB20_CON_B2_TSTMOD(usb3->test_mode);
498 usb3_write(usb3, val | USB20_CON_B2_TSTMOD_EN, USB3_USB20_CON);
499 if (!usb3->test_mode)
500 usb3_clear_bit(usb3, USB20_CON_B2_TSTMOD_EN, USB3_USB20_CON);
503 static void usb3_start_usb2_connection(struct renesas_usb3 *usb3)
505 usb3->disabled_count++;
506 usb3_set_bit(usb3, USB_COM_CON_EP0_EN, USB3_USB_COM_CON);
507 usb3_set_bit(usb3, USB_COM_CON_SPD_MODE, USB3_USB_COM_CON);
508 usb3_usb2_pullup(usb3, 1);
511 static int usb3_is_usb3_phy_in_u3(struct renesas_usb3 *usb3)
513 return usb3_read(usb3, USB3_USB30_CON) & USB30_CON_POW_SEL_IN_U3;
516 static bool usb3_wakeup_usb3_phy(struct renesas_usb3 *usb3)
518 if (!usb3_is_usb3_phy_in_u3(usb3))
519 return true; /* already waked it up */
521 usb3_set_bit(usb3, USB30_CON_B3_PLLWAKE, USB3_USB30_CON);
522 usb3_enable_irq_1(usb3, USB_INT_1_B3_PLLWKUP);
527 static u16 usb3_feature_get_un_enabled(struct renesas_usb3 *usb3)
529 u32 mask_u2 = SSIFCMD_UDIR_U2 | SSIFCMD_UREQ_U2;
530 u32 mask_u1 = SSIFCMD_UDIR_U1 | SSIFCMD_UREQ_U1;
531 u32 val = usb3_read(usb3, USB3_SSIFCMD);
534 /* Enables {U2,U1} if the bits of UDIR and UREQ are set to 0 */
535 if (!(val & mask_u2))
536 ret |= 1 << USB_DEV_STAT_U2_ENABLED;
537 if (!(val & mask_u1))
538 ret |= 1 << USB_DEV_STAT_U1_ENABLED;
543 static void usb3_feature_u2_enable(struct renesas_usb3 *usb3, bool enable)
545 u32 bits = SSIFCMD_UDIR_U2 | SSIFCMD_UREQ_U2;
547 /* Enables U2 if the bits of UDIR and UREQ are set to 0 */
549 usb3_clear_bit(usb3, bits, USB3_SSIFCMD);
551 usb3_set_bit(usb3, bits, USB3_SSIFCMD);
554 static void usb3_feature_u1_enable(struct renesas_usb3 *usb3, bool enable)
556 u32 bits = SSIFCMD_UDIR_U1 | SSIFCMD_UREQ_U1;
558 /* Enables U1 if the bits of UDIR and UREQ are set to 0 */
560 usb3_clear_bit(usb3, bits, USB3_SSIFCMD);
562 usb3_set_bit(usb3, bits, USB3_SSIFCMD);
565 static void usb3_start_operation_for_usb3(struct renesas_usb3 *usb3)
567 usb3_set_bit(usb3, USB_COM_CON_EP0_EN, USB3_USB_COM_CON);
568 usb3_clear_bit(usb3, USB_COM_CON_SPD_MODE, USB3_USB_COM_CON);
569 usb3_set_bit(usb3, USB30_CON_B3_CONNECT, USB3_USB30_CON);
572 static void usb3_start_usb3_connection(struct renesas_usb3 *usb3)
574 usb3_start_operation_for_usb3(usb3);
575 usb3_set_bit(usb3, USB_COM_CON_RX_DETECTION, USB3_USB_COM_CON);
577 usb3_enable_irq_1(usb3, USB_INT_1_B3_LUPSUCS | USB_INT_1_B3_DISABLE |
581 static void usb3_stop_usb3_connection(struct renesas_usb3 *usb3)
583 usb3_clear_bit(usb3, USB30_CON_B3_CONNECT, USB3_USB30_CON);
586 static void usb3_transition_to_default_state(struct renesas_usb3 *usb3,
589 usb3_set_bit(usb3, USB_INT_2_PIPE(0), USB3_USB_INT_ENA_2);
590 usb3_write(usb3, P0_INT_ALL_BITS, USB3_P0_INT_STA);
591 usb3_set_bit(usb3, P0_INT_ALL_BITS, USB3_P0_INT_ENA);
594 usb3_enable_irq_1(usb3, USB_INT_1_B3_WRMRST |
595 USB_INT_1_B3_HOTRST);
597 usb3_enable_irq_1(usb3, USB_INT_1_B2_SPND |
598 USB_INT_1_B2_L1SPND | USB_INT_1_B2_USBRST);
601 static void usb3_connect(struct renesas_usb3 *usb3)
603 if (usb3_wakeup_usb3_phy(usb3))
604 usb3_start_usb3_connection(usb3);
607 static void usb3_reset_epc(struct renesas_usb3 *usb3)
609 usb3_clear_bit(usb3, USB_COM_CON_CONF, USB3_USB_COM_CON);
610 usb3_clear_bit(usb3, USB_COM_CON_EP0_EN, USB3_USB_COM_CON);
611 usb3_set_bit(usb3, USB_COM_CON_PIPE_CLR, USB3_USB_COM_CON);
613 usb3_set_test_mode(usb3);
616 static void usb3_disconnect(struct renesas_usb3 *usb3)
618 usb3->disabled_count = 0;
619 usb3_usb2_pullup(usb3, 0);
620 usb3_clear_bit(usb3, USB30_CON_B3_CONNECT, USB3_USB30_CON);
621 usb3_reset_epc(usb3);
624 usb3->driver->disconnect(&usb3->gadget);
627 static void usb3_check_vbus(struct renesas_usb3 *usb3)
629 if (usb3->workaround_for_vbus) {
632 usb3->extcon_usb = !!(usb3_read(usb3, USB3_USB_STA) &
634 if (usb3->extcon_usb)
637 usb3_disconnect(usb3);
639 schedule_work(&usb3->extcon_work);
643 static void usb3_set_mode(struct renesas_usb3 *usb3, bool host)
646 usb3_clear_bit(usb3, DRD_CON_PERI_CON, USB3_DRD_CON);
648 usb3_set_bit(usb3, DRD_CON_PERI_CON, USB3_DRD_CON);
651 static void usb3_vbus_out(struct renesas_usb3 *usb3, bool enable)
654 usb3_set_bit(usb3, DRD_CON_VBOUT, USB3_DRD_CON);
656 usb3_clear_bit(usb3, DRD_CON_VBOUT, USB3_DRD_CON);
659 static void usb3_mode_config(struct renesas_usb3 *usb3, bool host, bool a_dev)
663 spin_lock_irqsave(&usb3->lock, flags);
664 usb3_set_mode(usb3, host);
665 usb3_vbus_out(usb3, a_dev);
666 if (!host && a_dev) /* for A-Peripheral */
668 spin_unlock_irqrestore(&usb3->lock, flags);
671 static bool usb3_is_a_device(struct renesas_usb3 *usb3)
673 return !(usb3_read(usb3, USB3_USB_OTG_STA) & USB_OTG_IDMON);
676 static void usb3_check_id(struct renesas_usb3 *usb3)
678 usb3->extcon_host = usb3_is_a_device(usb3);
680 if (usb3->extcon_host)
681 usb3_mode_config(usb3, true, true);
683 usb3_mode_config(usb3, false, false);
685 schedule_work(&usb3->extcon_work);
688 static void renesas_usb3_init_controller(struct renesas_usb3 *usb3)
690 usb3_init_axi_bridge(usb3);
691 usb3_init_epc_registers(usb3);
692 usb3_set_bit(usb3, USB_COM_CON_PN_WDATAIF_NL |
693 USB_COM_CON_PN_RDATAIF_NL | USB_COM_CON_PN_LSTTR_PP,
695 usb3_write(usb3, USB_OTG_IDMON, USB3_USB_OTG_INT_STA);
696 usb3_write(usb3, USB_OTG_IDMON, USB3_USB_OTG_INT_ENA);
699 usb3_check_vbus(usb3);
702 static void renesas_usb3_stop_controller(struct renesas_usb3 *usb3)
704 usb3_disconnect(usb3);
705 usb3_write(usb3, 0, USB3_P0_INT_ENA);
706 usb3_write(usb3, 0, USB3_USB_OTG_INT_ENA);
707 usb3_write(usb3, 0, USB3_USB_INT_ENA_1);
708 usb3_write(usb3, 0, USB3_USB_INT_ENA_2);
709 usb3_write(usb3, 0, USB3_AXI_INT_ENA);
712 static void usb3_irq_epc_int_1_pll_wakeup(struct renesas_usb3 *usb3)
714 usb3_disable_irq_1(usb3, USB_INT_1_B3_PLLWKUP);
715 usb3_clear_bit(usb3, USB30_CON_B3_PLLWAKE, USB3_USB30_CON);
716 usb3_start_usb3_connection(usb3);
719 static void usb3_irq_epc_int_1_linkup_success(struct renesas_usb3 *usb3)
721 usb3_transition_to_default_state(usb3, true);
724 static void usb3_irq_epc_int_1_resume(struct renesas_usb3 *usb3)
726 usb3_disable_irq_1(usb3, USB_INT_1_B2_RSUM);
727 usb3_start_usb2_connection(usb3);
728 usb3_transition_to_default_state(usb3, false);
731 static void usb3_irq_epc_int_1_disable(struct renesas_usb3 *usb3)
733 usb3_stop_usb3_connection(usb3);
734 if (usb3_wakeup_usb2_phy(usb3))
735 usb3_irq_epc_int_1_resume(usb3);
738 static void usb3_irq_epc_int_1_bus_reset(struct renesas_usb3 *usb3)
740 usb3_reset_epc(usb3);
741 if (usb3->disabled_count < 3)
742 usb3_start_usb3_connection(usb3);
744 usb3_start_usb2_connection(usb3);
747 static void usb3_irq_epc_int_1_vbus_change(struct renesas_usb3 *usb3)
749 usb3_check_vbus(usb3);
752 static void usb3_irq_epc_int_1_hot_reset(struct renesas_usb3 *usb3)
754 usb3_reset_epc(usb3);
755 usb3_set_bit(usb3, USB_COM_CON_EP0_EN, USB3_USB_COM_CON);
757 /* This bit shall be set within 12ms from the start of HotReset */
758 usb3_set_bit(usb3, USB30_CON_B3_HOTRST_CMP, USB3_USB30_CON);
761 static void usb3_irq_epc_int_1_warm_reset(struct renesas_usb3 *usb3)
763 usb3_reset_epc(usb3);
764 usb3_set_bit(usb3, USB_COM_CON_EP0_EN, USB3_USB_COM_CON);
766 usb3_start_operation_for_usb3(usb3);
767 usb3_enable_irq_1(usb3, USB_INT_1_SPEED);
770 static void usb3_irq_epc_int_1_speed(struct renesas_usb3 *usb3)
772 u32 speed = usb3_read(usb3, USB3_USB_STA) & USB_STA_SPEED_MASK;
775 case USB_STA_SPEED_SS:
776 usb3->gadget.speed = USB_SPEED_SUPER;
778 case USB_STA_SPEED_HS:
779 usb3->gadget.speed = USB_SPEED_HIGH;
781 case USB_STA_SPEED_FS:
782 usb3->gadget.speed = USB_SPEED_FULL;
785 usb3->gadget.speed = USB_SPEED_UNKNOWN;
790 static void usb3_irq_epc_int_1(struct renesas_usb3 *usb3, u32 int_sta_1)
792 if (int_sta_1 & USB_INT_1_B3_PLLWKUP)
793 usb3_irq_epc_int_1_pll_wakeup(usb3);
795 if (int_sta_1 & USB_INT_1_B3_LUPSUCS)
796 usb3_irq_epc_int_1_linkup_success(usb3);
798 if (int_sta_1 & USB_INT_1_B3_HOTRST)
799 usb3_irq_epc_int_1_hot_reset(usb3);
801 if (int_sta_1 & USB_INT_1_B3_WRMRST)
802 usb3_irq_epc_int_1_warm_reset(usb3);
804 if (int_sta_1 & USB_INT_1_B3_DISABLE)
805 usb3_irq_epc_int_1_disable(usb3);
807 if (int_sta_1 & USB_INT_1_B2_USBRST)
808 usb3_irq_epc_int_1_bus_reset(usb3);
810 if (int_sta_1 & USB_INT_1_B2_RSUM)
811 usb3_irq_epc_int_1_resume(usb3);
813 if (int_sta_1 & USB_INT_1_SPEED)
814 usb3_irq_epc_int_1_speed(usb3);
816 if (int_sta_1 & USB_INT_1_VBUS_CNG)
817 usb3_irq_epc_int_1_vbus_change(usb3);
820 static struct renesas_usb3_request *__usb3_get_request(struct renesas_usb3_ep
823 return list_first_entry_or_null(&usb3_ep->queue,
824 struct renesas_usb3_request, queue);
827 static struct renesas_usb3_request *usb3_get_request(struct renesas_usb3_ep
830 struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
831 struct renesas_usb3_request *usb3_req;
834 spin_lock_irqsave(&usb3->lock, flags);
835 usb3_req = __usb3_get_request(usb3_ep);
836 spin_unlock_irqrestore(&usb3->lock, flags);
841 static void __usb3_request_done(struct renesas_usb3_ep *usb3_ep,
842 struct renesas_usb3_request *usb3_req,
845 struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
847 dev_dbg(usb3_to_dev(usb3), "giveback: ep%2d, %u, %u, %d\n",
848 usb3_ep->num, usb3_req->req.length, usb3_req->req.actual,
850 usb3_req->req.status = status;
851 usb3_ep->started = false;
852 list_del_init(&usb3_req->queue);
853 spin_unlock(&usb3->lock);
854 usb_gadget_giveback_request(&usb3_ep->ep, &usb3_req->req);
855 spin_lock(&usb3->lock);
858 static void usb3_request_done(struct renesas_usb3_ep *usb3_ep,
859 struct renesas_usb3_request *usb3_req, int status)
861 struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
864 spin_lock_irqsave(&usb3->lock, flags);
865 __usb3_request_done(usb3_ep, usb3_req, status);
866 spin_unlock_irqrestore(&usb3->lock, flags);
869 static void usb3_irq_epc_pipe0_status_end(struct renesas_usb3 *usb3)
871 struct renesas_usb3_ep *usb3_ep = usb3_get_ep(usb3, 0);
872 struct renesas_usb3_request *usb3_req = usb3_get_request(usb3_ep);
875 usb3_request_done(usb3_ep, usb3_req, 0);
877 usb3_set_test_mode(usb3);
880 static void usb3_get_setup_data(struct renesas_usb3 *usb3,
881 struct usb_ctrlrequest *ctrl)
883 struct renesas_usb3_ep *usb3_ep = usb3_get_ep(usb3, 0);
884 u32 *data = (u32 *)ctrl;
886 *data++ = usb3_read(usb3, USB3_STUP_DAT_0);
887 *data = usb3_read(usb3, USB3_STUP_DAT_1);
889 /* update this driver's flag */
890 usb3_ep->dir_in = !!(ctrl->bRequestType & USB_DIR_IN);
893 static void usb3_set_p0_con_update_res(struct renesas_usb3 *usb3, u32 res)
895 u32 val = usb3_read(usb3, USB3_P0_CON);
897 val &= ~(P0_CON_ST_RES_MASK | P0_CON_OT_RES_MASK | P0_CON_IN_RES_MASK);
898 val |= res | P0_CON_RES_WEN;
899 usb3_write(usb3, val, USB3_P0_CON);
902 static void usb3_set_p0_con_for_ctrl_read_data(struct renesas_usb3 *usb3)
904 usb3_set_p0_con_update_res(usb3, P0_CON_ST_RES_FORCE_NRDY |
905 P0_CON_OT_RES_FORCE_STALL |
906 P0_CON_IN_RES_NORMAL);
909 static void usb3_set_p0_con_for_ctrl_read_status(struct renesas_usb3 *usb3)
911 usb3_set_p0_con_update_res(usb3, P0_CON_ST_RES_NORMAL |
912 P0_CON_OT_RES_FORCE_STALL |
913 P0_CON_IN_RES_NORMAL);
916 static void usb3_set_p0_con_for_ctrl_write_data(struct renesas_usb3 *usb3)
918 usb3_set_p0_con_update_res(usb3, P0_CON_ST_RES_FORCE_NRDY |
919 P0_CON_OT_RES_NORMAL |
920 P0_CON_IN_RES_FORCE_STALL);
923 static void usb3_set_p0_con_for_ctrl_write_status(struct renesas_usb3 *usb3)
925 usb3_set_p0_con_update_res(usb3, P0_CON_ST_RES_NORMAL |
926 P0_CON_OT_RES_NORMAL |
927 P0_CON_IN_RES_FORCE_STALL);
930 static void usb3_set_p0_con_for_no_data(struct renesas_usb3 *usb3)
932 usb3_set_p0_con_update_res(usb3, P0_CON_ST_RES_NORMAL |
933 P0_CON_OT_RES_FORCE_STALL |
934 P0_CON_IN_RES_FORCE_STALL);
937 static void usb3_set_p0_con_stall(struct renesas_usb3 *usb3)
939 usb3_set_p0_con_update_res(usb3, P0_CON_ST_RES_FORCE_STALL |
940 P0_CON_OT_RES_FORCE_STALL |
941 P0_CON_IN_RES_FORCE_STALL);
944 static void usb3_set_p0_con_stop(struct renesas_usb3 *usb3)
946 usb3_set_p0_con_update_res(usb3, P0_CON_ST_RES_FORCE_NRDY |
947 P0_CON_OT_RES_FORCE_NRDY |
948 P0_CON_IN_RES_FORCE_NRDY);
951 static int usb3_pn_change(struct renesas_usb3 *usb3, int num)
953 if (num == 0 || num > usb3->num_usb3_eps)
956 usb3_write(usb3, num, USB3_PIPE_COM);
961 static void usb3_set_pn_con_update_res(struct renesas_usb3 *usb3, u32 res)
963 u32 val = usb3_read(usb3, USB3_PN_CON);
965 val &= ~PN_CON_RES_MASK;
966 val |= res & PN_CON_RES_MASK;
967 val |= PN_CON_RES_WEN;
968 usb3_write(usb3, val, USB3_PN_CON);
971 static void usb3_pn_start(struct renesas_usb3 *usb3)
973 usb3_set_pn_con_update_res(usb3, PN_CON_RES_NORMAL);
976 static void usb3_pn_stop(struct renesas_usb3 *usb3)
978 usb3_set_pn_con_update_res(usb3, PN_CON_RES_FORCE_NRDY);
981 static void usb3_pn_stall(struct renesas_usb3 *usb3)
983 usb3_set_pn_con_update_res(usb3, PN_CON_RES_FORCE_STALL);
986 static int usb3_pn_con_clear(struct renesas_usb3 *usb3)
988 usb3_set_bit(usb3, PN_CON_CLR, USB3_PN_CON);
990 return usb3_wait(usb3, USB3_PN_CON, PN_CON_CLR, 0);
993 static bool usb3_is_transfer_complete(struct renesas_usb3_ep *usb3_ep,
994 struct renesas_usb3_request *usb3_req)
996 struct usb_request *req = &usb3_req->req;
998 if ((!req->zero && req->actual == req->length) ||
999 (req->actual % usb3_ep->ep.maxpacket) || (req->length == 0))
1005 static int usb3_wait_pipe_status(struct renesas_usb3_ep *usb3_ep, u32 mask)
1007 struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
1008 u32 sta_reg = usb3_ep->num ? USB3_PN_STA : USB3_P0_STA;
1010 return usb3_wait(usb3, sta_reg, mask, mask);
1013 static void usb3_set_px_con_send(struct renesas_usb3_ep *usb3_ep, int bytes,
1016 struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
1017 u32 con_reg = usb3_ep->num ? USB3_PN_CON : USB3_P0_CON;
1018 u32 val = usb3_read(usb3, con_reg);
1020 val |= PX_CON_SEND | PX_CON_BYTE_EN_BYTES(bytes);
1021 val |= (usb3_ep->num && last) ? PN_CON_LAST : 0;
1022 usb3_write(usb3, val, con_reg);
1025 static int usb3_write_pipe(struct renesas_usb3_ep *usb3_ep,
1026 struct renesas_usb3_request *usb3_req,
1029 struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
1031 int len = min_t(unsigned, usb3_req->req.length - usb3_req->req.actual,
1032 usb3_ep->ep.maxpacket);
1033 u8 *buf = usb3_req->req.buf + usb3_req->req.actual;
1037 if (usb3_wait_pipe_status(usb3_ep, PX_STA_BUFSTS) < 0)
1040 /* Update gadget driver parameter */
1041 usb3_req->req.actual += len;
1043 /* Write data to the register */
1045 iowrite32_rep(usb3->reg + fifo_reg, buf, len / 4);
1046 buf += (len / 4) * 4;
1047 len %= 4; /* update len to use usb3_set_pX_con_send() */
1051 for (i = 0; i < len; i++)
1052 tmp |= buf[i] << (8 * i);
1053 usb3_write(usb3, tmp, fifo_reg);
1056 is_last = usb3_is_transfer_complete(usb3_ep, usb3_req);
1058 usb3_set_px_con_send(usb3_ep, len, is_last);
1060 return is_last ? 0 : -EAGAIN;
1063 static u32 usb3_get_received_length(struct renesas_usb3_ep *usb3_ep)
1065 struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
1066 u32 lng_reg = usb3_ep->num ? USB3_PN_LNG : USB3_P0_LNG;
1068 return usb3_read(usb3, lng_reg);
1071 static int usb3_read_pipe(struct renesas_usb3_ep *usb3_ep,
1072 struct renesas_usb3_request *usb3_req, u32 fifo_reg)
1074 struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
1076 int len = min_t(unsigned, usb3_req->req.length - usb3_req->req.actual,
1077 usb3_get_received_length(usb3_ep));
1078 u8 *buf = usb3_req->req.buf + usb3_req->req.actual;
1084 /* Update gadget driver parameter */
1085 usb3_req->req.actual += len;
1087 /* Read data from the register */
1089 ioread32_rep(usb3->reg + fifo_reg, buf, len / 4);
1090 buf += (len / 4) * 4;
1095 tmp = usb3_read(usb3, fifo_reg);
1096 for (i = 0; i < len; i++)
1097 buf[i] = (tmp >> (8 * i)) & 0xff;
1100 return usb3_is_transfer_complete(usb3_ep, usb3_req) ? 0 : -EAGAIN;
1103 static void usb3_set_status_stage(struct renesas_usb3_ep *usb3_ep,
1104 struct renesas_usb3_request *usb3_req)
1106 struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
1108 if (usb3_ep->dir_in) {
1109 usb3_set_p0_con_for_ctrl_read_status(usb3);
1111 if (!usb3_req->req.length)
1112 usb3_set_p0_con_for_no_data(usb3);
1114 usb3_set_p0_con_for_ctrl_write_status(usb3);
1118 static void usb3_p0_xfer(struct renesas_usb3_ep *usb3_ep,
1119 struct renesas_usb3_request *usb3_req)
1123 if (usb3_ep->dir_in)
1124 ret = usb3_write_pipe(usb3_ep, usb3_req, USB3_P0_WRITE);
1126 ret = usb3_read_pipe(usb3_ep, usb3_req, USB3_P0_READ);
1129 usb3_set_status_stage(usb3_ep, usb3_req);
1132 static void usb3_start_pipe0(struct renesas_usb3_ep *usb3_ep,
1133 struct renesas_usb3_request *usb3_req)
1135 struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
1137 if (usb3_ep->started)
1140 usb3_ep->started = true;
1142 if (usb3_ep->dir_in) {
1143 usb3_set_bit(usb3, P0_MOD_DIR, USB3_P0_MOD);
1144 usb3_set_p0_con_for_ctrl_read_data(usb3);
1146 usb3_clear_bit(usb3, P0_MOD_DIR, USB3_P0_MOD);
1147 usb3_set_p0_con_for_ctrl_write_data(usb3);
1150 usb3_p0_xfer(usb3_ep, usb3_req);
1153 static void usb3_enable_dma_pipen(struct renesas_usb3 *usb3)
1155 usb3_set_bit(usb3, PN_CON_DATAIF_EN, USB3_PN_CON);
1158 static void usb3_disable_dma_pipen(struct renesas_usb3 *usb3)
1160 usb3_clear_bit(usb3, PN_CON_DATAIF_EN, USB3_PN_CON);
1163 static void usb3_enable_dma_irq(struct renesas_usb3 *usb3, int num)
1165 usb3_set_bit(usb3, DMA_INT(num), USB3_DMA_INT_ENA);
1168 static void usb3_disable_dma_irq(struct renesas_usb3 *usb3, int num)
1170 usb3_clear_bit(usb3, DMA_INT(num), USB3_DMA_INT_ENA);
1173 static u32 usb3_dma_mps_to_prd_word1(struct renesas_usb3_ep *usb3_ep)
1175 switch (usb3_ep->ep.maxpacket) {
1177 return USB3_PRD1_MPS_8;
1179 return USB3_PRD1_MPS_16;
1181 return USB3_PRD1_MPS_32;
1183 return USB3_PRD1_MPS_64;
1185 return USB3_PRD1_MPS_512;
1187 return USB3_PRD1_MPS_1024;
1189 return USB3_PRD1_MPS_RESERVED;
1193 static bool usb3_dma_get_setting_area(struct renesas_usb3_ep *usb3_ep,
1194 struct renesas_usb3_request *usb3_req)
1196 struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
1197 struct renesas_usb3_dma *dma;
1201 if (usb3_req->req.length > USB3_DMA_MAX_XFER_SIZE_ALL_PRDS) {
1202 dev_dbg(usb3_to_dev(usb3), "%s: the length is too big (%d)\n",
1203 __func__, usb3_req->req.length);
1207 /* The driver doesn't handle zero-length packet via dmac */
1208 if (!usb3_req->req.length)
1211 if (usb3_dma_mps_to_prd_word1(usb3_ep) == USB3_PRD1_MPS_RESERVED)
1214 usb3_for_each_dma(usb3, dma, i) {
1218 if (usb_gadget_map_request(&usb3->gadget, &usb3_req->req,
1219 usb3_ep->dir_in) < 0)
1231 static void usb3_dma_put_setting_area(struct renesas_usb3_ep *usb3_ep,
1232 struct renesas_usb3_request *usb3_req)
1234 struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
1236 struct renesas_usb3_dma *dma;
1238 usb3_for_each_dma(usb3, dma, i) {
1239 if (usb3_ep->dma == dma) {
1240 usb_gadget_unmap_request(&usb3->gadget, &usb3_req->req,
1243 usb3_ep->dma = NULL;
1249 static void usb3_dma_fill_prd(struct renesas_usb3_ep *usb3_ep,
1250 struct renesas_usb3_request *usb3_req)
1252 struct renesas_usb3_prd *cur_prd = usb3_ep->dma->prd;
1253 u32 remain = usb3_req->req.length;
1254 u32 dma = usb3_req->req.dma;
1259 len = min_t(u32, remain, USB3_DMA_MAX_XFER_SIZE) &
1260 USB3_PRD1_SIZE_MASK;
1261 cur_prd->word1 = usb3_dma_mps_to_prd_word1(usb3_ep) |
1262 USB3_PRD1_B_INC | len;
1266 if (!remain || (i + 1) < USB3_DMA_NUM_PRD_ENTRIES)
1273 cur_prd->word1 |= USB3_PRD1_E | USB3_PRD1_INT;
1274 if (usb3_ep->dir_in)
1275 cur_prd->word1 |= USB3_PRD1_LST;
1278 static void usb3_dma_kick_prd(struct renesas_usb3_ep *usb3_ep)
1280 struct renesas_usb3_dma *dma = usb3_ep->dma;
1281 struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
1282 u32 dma_con = DMA_COM_PIPE_NO(usb3_ep->num) | DMA_CON_PRD_EN;
1284 if (usb3_ep->dir_in)
1285 dma_con |= DMA_CON_PIPE_DIR;
1287 wmb(); /* prd entries should be in system memory here */
1289 usb3_write(usb3, 1 << usb3_ep->num, USB3_DMA_INT_STA);
1290 usb3_write(usb3, AXI_INT_PRDEN_CLR_STA(dma->num) |
1291 AXI_INT_PRDERR_STA(dma->num), USB3_AXI_INT_STA);
1293 usb3_write(usb3, dma->prd_dma, USB3_DMA_CH0_PRD_ADR(dma->num));
1294 usb3_write(usb3, dma_con, USB3_DMA_CH0_CON(dma->num));
1295 usb3_enable_dma_irq(usb3, usb3_ep->num);
1298 static void usb3_dma_stop_prd(struct renesas_usb3_ep *usb3_ep)
1300 struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
1301 struct renesas_usb3_dma *dma = usb3_ep->dma;
1303 usb3_disable_dma_irq(usb3, usb3_ep->num);
1304 usb3_write(usb3, 0, USB3_DMA_CH0_CON(dma->num));
1307 static int usb3_dma_update_status(struct renesas_usb3_ep *usb3_ep,
1308 struct renesas_usb3_request *usb3_req)
1310 struct renesas_usb3_prd *cur_prd = usb3_ep->dma->prd;
1311 struct usb_request *req = &usb3_req->req;
1316 rmb(); /* The controller updated prd entries */
1319 if (cur_prd->word1 & USB3_PRD1_D)
1321 if (cur_prd->word1 & USB3_PRD1_E)
1322 len = req->length % USB3_DMA_MAX_XFER_SIZE;
1324 len = USB3_DMA_MAX_XFER_SIZE;
1325 remain = cur_prd->word1 & USB3_PRD1_SIZE_MASK;
1326 req->actual += len - remain;
1328 if (cur_prd->word1 & USB3_PRD1_E ||
1329 (i + 1) < USB3_DMA_NUM_PRD_ENTRIES)
1339 static bool usb3_dma_try_start(struct renesas_usb3_ep *usb3_ep,
1340 struct renesas_usb3_request *usb3_req)
1342 struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
1347 if (usb3_dma_get_setting_area(usb3_ep, usb3_req)) {
1349 usb3_enable_dma_pipen(usb3);
1350 usb3_dma_fill_prd(usb3_ep, usb3_req);
1351 usb3_dma_kick_prd(usb3_ep);
1352 usb3_pn_start(usb3);
1359 static int usb3_dma_try_stop(struct renesas_usb3_ep *usb3_ep,
1360 struct renesas_usb3_request *usb3_req)
1362 struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
1363 unsigned long flags;
1366 spin_lock_irqsave(&usb3->lock, flags);
1370 if (!usb3_pn_change(usb3, usb3_ep->num))
1371 usb3_disable_dma_pipen(usb3);
1372 usb3_dma_stop_prd(usb3_ep);
1373 status = usb3_dma_update_status(usb3_ep, usb3_req);
1374 usb3_dma_put_setting_area(usb3_ep, usb3_req);
1377 spin_unlock_irqrestore(&usb3->lock, flags);
1381 static int renesas_usb3_dma_free_prd(struct renesas_usb3 *usb3,
1385 struct renesas_usb3_dma *dma;
1387 usb3_for_each_dma(usb3, dma, i) {
1389 dma_free_coherent(dev, USB3_DMA_PRD_SIZE,
1390 dma->prd, dma->prd_dma);
1398 static int renesas_usb3_dma_alloc_prd(struct renesas_usb3 *usb3,
1402 struct renesas_usb3_dma *dma;
1407 usb3_for_each_dma(usb3, dma, i) {
1408 dma->prd = dma_alloc_coherent(dev, USB3_DMA_PRD_SIZE,
1409 &dma->prd_dma, GFP_KERNEL);
1411 renesas_usb3_dma_free_prd(usb3, dev);
1420 static void usb3_start_pipen(struct renesas_usb3_ep *usb3_ep,
1421 struct renesas_usb3_request *usb3_req)
1423 struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
1424 struct renesas_usb3_request *usb3_req_first = usb3_get_request(usb3_ep);
1425 unsigned long flags;
1427 u32 enable_bits = 0;
1429 spin_lock_irqsave(&usb3->lock, flags);
1430 if (usb3_ep->halt || usb3_ep->started)
1432 if (usb3_req != usb3_req_first)
1435 if (usb3_pn_change(usb3, usb3_ep->num) < 0)
1438 usb3_ep->started = true;
1440 if (usb3_dma_try_start(usb3_ep, usb3_req))
1443 usb3_pn_start(usb3);
1445 if (usb3_ep->dir_in) {
1446 ret = usb3_write_pipe(usb3_ep, usb3_req, USB3_PN_WRITE);
1447 enable_bits |= PN_INT_LSTTR;
1451 enable_bits |= PN_INT_BFRDY;
1454 usb3_set_bit(usb3, enable_bits, USB3_PN_INT_ENA);
1455 usb3_enable_pipe_irq(usb3, usb3_ep->num);
1458 spin_unlock_irqrestore(&usb3->lock, flags);
1461 static int renesas_usb3_ep_queue(struct usb_ep *_ep, struct usb_request *_req,
1464 struct renesas_usb3_ep *usb3_ep = usb_ep_to_usb3_ep(_ep);
1465 struct renesas_usb3_request *usb3_req = usb_req_to_usb3_req(_req);
1466 struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
1467 unsigned long flags;
1469 dev_dbg(usb3_to_dev(usb3), "ep_queue: ep%2d, %u\n", usb3_ep->num,
1472 _req->status = -EINPROGRESS;
1474 spin_lock_irqsave(&usb3->lock, flags);
1475 list_add_tail(&usb3_req->queue, &usb3_ep->queue);
1476 spin_unlock_irqrestore(&usb3->lock, flags);
1479 usb3_start_pipe0(usb3_ep, usb3_req);
1481 usb3_start_pipen(usb3_ep, usb3_req);
1486 static void usb3_set_device_address(struct renesas_usb3 *usb3, u16 addr)
1488 /* DEV_ADDR bit field is cleared by WarmReset, HotReset and BusReset */
1489 usb3_set_bit(usb3, USB_COM_CON_DEV_ADDR(addr), USB3_USB_COM_CON);
1492 static bool usb3_std_req_set_address(struct renesas_usb3 *usb3,
1493 struct usb_ctrlrequest *ctrl)
1495 if (ctrl->wValue >= 128)
1496 return true; /* stall */
1498 usb3_set_device_address(usb3, ctrl->wValue);
1499 usb3_set_p0_con_for_no_data(usb3);
1504 static void usb3_pipe0_internal_xfer(struct renesas_usb3 *usb3,
1505 void *tx_data, size_t len,
1506 void (*complete)(struct usb_ep *ep,
1507 struct usb_request *req))
1509 struct renesas_usb3_ep *usb3_ep = usb3_get_ep(usb3, 0);
1512 memcpy(usb3->ep0_buf, tx_data,
1513 min_t(size_t, len, USB3_EP0_BUF_SIZE));
1515 usb3->ep0_req->buf = &usb3->ep0_buf;
1516 usb3->ep0_req->length = len;
1517 usb3->ep0_req->complete = complete;
1518 renesas_usb3_ep_queue(&usb3_ep->ep, usb3->ep0_req, GFP_ATOMIC);
1521 static void usb3_pipe0_get_status_completion(struct usb_ep *ep,
1522 struct usb_request *req)
1526 static bool usb3_std_req_get_status(struct renesas_usb3 *usb3,
1527 struct usb_ctrlrequest *ctrl)
1530 struct renesas_usb3_ep *usb3_ep;
1534 switch (ctrl->bRequestType & USB_RECIP_MASK) {
1535 case USB_RECIP_DEVICE:
1536 if (usb3->gadget.is_selfpowered)
1537 status |= 1 << USB_DEVICE_SELF_POWERED;
1538 if (usb3->gadget.speed == USB_SPEED_SUPER)
1539 status |= usb3_feature_get_un_enabled(usb3);
1541 case USB_RECIP_INTERFACE:
1543 case USB_RECIP_ENDPOINT:
1544 num = le16_to_cpu(ctrl->wIndex) & USB_ENDPOINT_NUMBER_MASK;
1545 usb3_ep = usb3_get_ep(usb3, num);
1547 status |= 1 << USB_ENDPOINT_HALT;
1555 status = cpu_to_le16(status);
1556 dev_dbg(usb3_to_dev(usb3), "get_status: req = %p\n",
1557 usb_req_to_usb3_req(usb3->ep0_req));
1558 usb3_pipe0_internal_xfer(usb3, &status, sizeof(status),
1559 usb3_pipe0_get_status_completion);
1565 static bool usb3_std_req_feature_device(struct renesas_usb3 *usb3,
1566 struct usb_ctrlrequest *ctrl, bool set)
1569 u16 w_value = le16_to_cpu(ctrl->wValue);
1572 case USB_DEVICE_TEST_MODE:
1575 usb3->test_mode = le16_to_cpu(ctrl->wIndex) >> 8;
1578 case USB_DEVICE_U1_ENABLE:
1579 case USB_DEVICE_U2_ENABLE:
1580 if (usb3->gadget.speed != USB_SPEED_SUPER)
1582 if (w_value == USB_DEVICE_U1_ENABLE)
1583 usb3_feature_u1_enable(usb3, set);
1584 if (w_value == USB_DEVICE_U2_ENABLE)
1585 usb3_feature_u2_enable(usb3, set);
1595 static int usb3_set_halt_p0(struct renesas_usb3_ep *usb3_ep, bool halt)
1597 struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
1599 if (unlikely(usb3_ep->num))
1602 usb3_ep->halt = halt;
1604 usb3_set_p0_con_stall(usb3);
1606 usb3_set_p0_con_stop(usb3);
1611 static int usb3_set_halt_pn(struct renesas_usb3_ep *usb3_ep, bool halt,
1612 bool is_clear_feature)
1614 struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
1615 unsigned long flags;
1617 spin_lock_irqsave(&usb3->lock, flags);
1618 if (!usb3_pn_change(usb3, usb3_ep->num)) {
1619 usb3_ep->halt = halt;
1621 usb3_pn_stall(usb3);
1622 } else if (!is_clear_feature || !usb3_ep->wedge) {
1623 usb3_pn_con_clear(usb3);
1624 usb3_set_bit(usb3, PN_CON_EN, USB3_PN_CON);
1628 spin_unlock_irqrestore(&usb3->lock, flags);
1633 static int usb3_set_halt(struct renesas_usb3_ep *usb3_ep, bool halt,
1634 bool is_clear_feature)
1638 if (halt && usb3_ep->started)
1642 ret = usb3_set_halt_pn(usb3_ep, halt, is_clear_feature);
1644 ret = usb3_set_halt_p0(usb3_ep, halt);
1649 static bool usb3_std_req_feature_endpoint(struct renesas_usb3 *usb3,
1650 struct usb_ctrlrequest *ctrl,
1653 int num = le16_to_cpu(ctrl->wIndex) & USB_ENDPOINT_NUMBER_MASK;
1654 struct renesas_usb3_ep *usb3_ep;
1655 struct renesas_usb3_request *usb3_req;
1657 if (le16_to_cpu(ctrl->wValue) != USB_ENDPOINT_HALT)
1658 return true; /* stall */
1660 usb3_ep = usb3_get_ep(usb3, num);
1661 usb3_set_halt(usb3_ep, set, true);
1663 /* Restarts a queue if clear feature */
1665 usb3_ep->started = false;
1666 usb3_req = usb3_get_request(usb3_ep);
1668 usb3_start_pipen(usb3_ep, usb3_req);
1674 static bool usb3_std_req_feature(struct renesas_usb3 *usb3,
1675 struct usb_ctrlrequest *ctrl, bool set)
1679 switch (ctrl->bRequestType & USB_RECIP_MASK) {
1680 case USB_RECIP_DEVICE:
1681 stall = usb3_std_req_feature_device(usb3, ctrl, set);
1683 case USB_RECIP_INTERFACE:
1685 case USB_RECIP_ENDPOINT:
1686 stall = usb3_std_req_feature_endpoint(usb3, ctrl, set);
1694 usb3_set_p0_con_for_no_data(usb3);
1699 static void usb3_pipe0_set_sel_completion(struct usb_ep *ep,
1700 struct usb_request *req)
1705 static bool usb3_std_req_set_sel(struct renesas_usb3 *usb3,
1706 struct usb_ctrlrequest *ctrl)
1708 u16 w_length = le16_to_cpu(ctrl->wLength);
1711 return true; /* stall */
1713 dev_dbg(usb3_to_dev(usb3), "set_sel: req = %p\n",
1714 usb_req_to_usb3_req(usb3->ep0_req));
1715 usb3_pipe0_internal_xfer(usb3, NULL, 6, usb3_pipe0_set_sel_completion);
1720 static bool usb3_std_req_set_configuration(struct renesas_usb3 *usb3,
1721 struct usb_ctrlrequest *ctrl)
1723 if (ctrl->wValue > 0)
1724 usb3_set_bit(usb3, USB_COM_CON_CONF, USB3_USB_COM_CON);
1726 usb3_clear_bit(usb3, USB_COM_CON_CONF, USB3_USB_COM_CON);
1732 * usb3_handle_standard_request - handle some standard requests
1733 * @usb3: the renesas_usb3 pointer
1734 * @ctrl: a pointer of setup data
1736 * Returns true if this function handled a standard request
1738 static bool usb3_handle_standard_request(struct renesas_usb3 *usb3,
1739 struct usb_ctrlrequest *ctrl)
1744 if ((ctrl->bRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD) {
1745 switch (ctrl->bRequest) {
1746 case USB_REQ_SET_ADDRESS:
1747 stall = usb3_std_req_set_address(usb3, ctrl);
1750 case USB_REQ_GET_STATUS:
1751 stall = usb3_std_req_get_status(usb3, ctrl);
1754 case USB_REQ_CLEAR_FEATURE:
1755 stall = usb3_std_req_feature(usb3, ctrl, false);
1758 case USB_REQ_SET_FEATURE:
1759 stall = usb3_std_req_feature(usb3, ctrl, true);
1762 case USB_REQ_SET_SEL:
1763 stall = usb3_std_req_set_sel(usb3, ctrl);
1766 case USB_REQ_SET_ISOCH_DELAY:
1767 /* This hardware doesn't support Isochronous xfer */
1771 case USB_REQ_SET_CONFIGURATION:
1772 usb3_std_req_set_configuration(usb3, ctrl);
1780 usb3_set_p0_con_stall(usb3);
1785 static int usb3_p0_con_clear_buffer(struct renesas_usb3 *usb3)
1787 usb3_set_bit(usb3, P0_CON_BCLR, USB3_P0_CON);
1789 return usb3_wait(usb3, USB3_P0_CON, P0_CON_BCLR, 0);
1792 static void usb3_irq_epc_pipe0_setup(struct renesas_usb3 *usb3)
1794 struct usb_ctrlrequest ctrl;
1795 struct renesas_usb3_ep *usb3_ep = usb3_get_ep(usb3, 0);
1797 /* Call giveback function if previous transfer is not completed */
1798 if (usb3_ep->started)
1799 usb3_request_done(usb3_ep, usb3_get_request(usb3_ep),
1802 usb3_p0_con_clear_buffer(usb3);
1803 usb3_get_setup_data(usb3, &ctrl);
1804 if (!usb3_handle_standard_request(usb3, &ctrl))
1805 if (usb3->driver->setup(&usb3->gadget, &ctrl) < 0)
1806 usb3_set_p0_con_stall(usb3);
1809 static void usb3_irq_epc_pipe0_bfrdy(struct renesas_usb3 *usb3)
1811 struct renesas_usb3_ep *usb3_ep = usb3_get_ep(usb3, 0);
1812 struct renesas_usb3_request *usb3_req = usb3_get_request(usb3_ep);
1817 usb3_p0_xfer(usb3_ep, usb3_req);
1820 static void usb3_irq_epc_pipe0(struct renesas_usb3 *usb3)
1822 u32 p0_int_sta = usb3_read(usb3, USB3_P0_INT_STA);
1824 p0_int_sta &= usb3_read(usb3, USB3_P0_INT_ENA);
1825 usb3_write(usb3, p0_int_sta, USB3_P0_INT_STA);
1826 if (p0_int_sta & P0_INT_STSED)
1827 usb3_irq_epc_pipe0_status_end(usb3);
1828 if (p0_int_sta & P0_INT_SETUP)
1829 usb3_irq_epc_pipe0_setup(usb3);
1830 if (p0_int_sta & P0_INT_BFRDY)
1831 usb3_irq_epc_pipe0_bfrdy(usb3);
1834 static void usb3_request_done_pipen(struct renesas_usb3 *usb3,
1835 struct renesas_usb3_ep *usb3_ep,
1836 struct renesas_usb3_request *usb3_req,
1839 unsigned long flags;
1841 spin_lock_irqsave(&usb3->lock, flags);
1842 if (usb3_pn_change(usb3, usb3_ep->num))
1844 spin_unlock_irqrestore(&usb3->lock, flags);
1846 usb3_disable_pipe_irq(usb3, usb3_ep->num);
1847 usb3_request_done(usb3_ep, usb3_req, status);
1849 /* get next usb3_req */
1850 usb3_req = usb3_get_request(usb3_ep);
1852 usb3_start_pipen(usb3_ep, usb3_req);
1855 static void usb3_irq_epc_pipen_lsttr(struct renesas_usb3 *usb3, int num)
1857 struct renesas_usb3_ep *usb3_ep = usb3_get_ep(usb3, num);
1858 struct renesas_usb3_request *usb3_req = usb3_get_request(usb3_ep);
1863 if (usb3_ep->dir_in) {
1864 dev_dbg(usb3_to_dev(usb3), "%s: len = %u, actual = %u\n",
1865 __func__, usb3_req->req.length, usb3_req->req.actual);
1866 usb3_request_done_pipen(usb3, usb3_ep, usb3_req, 0);
1870 static void usb3_irq_epc_pipen_bfrdy(struct renesas_usb3 *usb3, int num)
1872 struct renesas_usb3_ep *usb3_ep = usb3_get_ep(usb3, num);
1873 struct renesas_usb3_request *usb3_req = usb3_get_request(usb3_ep);
1879 spin_lock(&usb3->lock);
1880 if (usb3_pn_change(usb3, num))
1883 if (usb3_ep->dir_in) {
1884 /* Do not stop the IN pipe here to detect LSTTR interrupt */
1885 if (!usb3_write_pipe(usb3_ep, usb3_req, USB3_PN_WRITE))
1886 usb3_clear_bit(usb3, PN_INT_BFRDY, USB3_PN_INT_ENA);
1888 if (!usb3_read_pipe(usb3_ep, usb3_req, USB3_PN_READ))
1893 /* need to unlock because usb3_request_done_pipen() locks it */
1894 spin_unlock(&usb3->lock);
1897 usb3_request_done_pipen(usb3, usb3_ep, usb3_req, 0);
1900 static void usb3_irq_epc_pipen(struct renesas_usb3 *usb3, int num)
1904 spin_lock(&usb3->lock);
1905 if (usb3_pn_change(usb3, num) < 0) {
1906 spin_unlock(&usb3->lock);
1910 pn_int_sta = usb3_read(usb3, USB3_PN_INT_STA);
1911 pn_int_sta &= usb3_read(usb3, USB3_PN_INT_ENA);
1912 usb3_write(usb3, pn_int_sta, USB3_PN_INT_STA);
1913 spin_unlock(&usb3->lock);
1914 if (pn_int_sta & PN_INT_LSTTR)
1915 usb3_irq_epc_pipen_lsttr(usb3, num);
1916 if (pn_int_sta & PN_INT_BFRDY)
1917 usb3_irq_epc_pipen_bfrdy(usb3, num);
1920 static void usb3_irq_epc_int_2(struct renesas_usb3 *usb3, u32 int_sta_2)
1924 for (i = 0; i < usb3->num_usb3_eps; i++) {
1925 if (int_sta_2 & USB_INT_2_PIPE(i)) {
1927 usb3_irq_epc_pipe0(usb3);
1929 usb3_irq_epc_pipen(usb3, i);
1934 static void usb3_irq_idmon_change(struct renesas_usb3 *usb3)
1936 usb3_check_id(usb3);
1939 static void usb3_irq_otg_int(struct renesas_usb3 *usb3, u32 otg_int_sta)
1941 if (otg_int_sta & USB_OTG_IDMON)
1942 usb3_irq_idmon_change(usb3);
1945 static void usb3_irq_epc(struct renesas_usb3 *usb3)
1947 u32 int_sta_1 = usb3_read(usb3, USB3_USB_INT_STA_1);
1948 u32 int_sta_2 = usb3_read(usb3, USB3_USB_INT_STA_2);
1949 u32 otg_int_sta = usb3_read(usb3, USB3_USB_OTG_INT_STA);
1951 int_sta_1 &= usb3_read(usb3, USB3_USB_INT_ENA_1);
1953 usb3_write(usb3, int_sta_1, USB3_USB_INT_STA_1);
1954 usb3_irq_epc_int_1(usb3, int_sta_1);
1957 int_sta_2 &= usb3_read(usb3, USB3_USB_INT_ENA_2);
1959 usb3_irq_epc_int_2(usb3, int_sta_2);
1961 otg_int_sta &= usb3_read(usb3, USB3_USB_OTG_INT_ENA);
1963 usb3_write(usb3, otg_int_sta, USB3_USB_OTG_INT_STA);
1964 usb3_irq_otg_int(usb3, otg_int_sta);
1968 static void usb3_irq_dma_int(struct renesas_usb3 *usb3, u32 dma_sta)
1970 struct renesas_usb3_ep *usb3_ep;
1971 struct renesas_usb3_request *usb3_req;
1974 for (i = 0; i < usb3->num_usb3_eps; i++) {
1975 if (!(dma_sta & DMA_INT(i)))
1978 usb3_ep = usb3_get_ep(usb3, i);
1979 if (!(usb3_read(usb3, USB3_AXI_INT_STA) &
1980 AXI_INT_PRDEN_CLR_STA(usb3_ep->dma->num)))
1983 usb3_req = usb3_get_request(usb3_ep);
1984 status = usb3_dma_try_stop(usb3_ep, usb3_req);
1985 usb3_request_done_pipen(usb3, usb3_ep, usb3_req, status);
1989 static void usb3_irq_dma(struct renesas_usb3 *usb3)
1991 u32 dma_sta = usb3_read(usb3, USB3_DMA_INT_STA);
1993 dma_sta &= usb3_read(usb3, USB3_DMA_INT_ENA);
1995 usb3_write(usb3, dma_sta, USB3_DMA_INT_STA);
1996 usb3_irq_dma_int(usb3, dma_sta);
2000 static irqreturn_t renesas_usb3_irq(int irq, void *_usb3)
2002 struct renesas_usb3 *usb3 = _usb3;
2003 irqreturn_t ret = IRQ_NONE;
2004 u32 axi_int_sta = usb3_read(usb3, USB3_AXI_INT_STA);
2006 if (axi_int_sta & AXI_INT_DMAINT) {
2011 if (axi_int_sta & AXI_INT_EPCINT) {
2019 static void usb3_write_pn_mod(struct renesas_usb3_ep *usb3_ep,
2020 const struct usb_endpoint_descriptor *desc)
2022 struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
2025 val |= usb3_ep->dir_in ? PN_MOD_DIR : 0;
2026 val |= PN_MOD_TYPE(usb_endpoint_type(desc));
2027 val |= PN_MOD_EPNUM(usb_endpoint_num(desc));
2028 usb3_write(usb3, val, USB3_PN_MOD);
2031 static u32 usb3_calc_ramarea(int ram_size)
2033 WARN_ON(ram_size > SZ_16K);
2035 if (ram_size <= SZ_1K)
2036 return PN_RAMMAP_RAMAREA_1KB;
2037 else if (ram_size <= SZ_2K)
2038 return PN_RAMMAP_RAMAREA_2KB;
2039 else if (ram_size <= SZ_4K)
2040 return PN_RAMMAP_RAMAREA_4KB;
2041 else if (ram_size <= SZ_8K)
2042 return PN_RAMMAP_RAMAREA_8KB;
2044 return PN_RAMMAP_RAMAREA_16KB;
2047 static u32 usb3_calc_rammap_val(struct renesas_usb3_ep *usb3_ep,
2048 const struct usb_endpoint_descriptor *desc)
2050 return usb3_ep->rammap_val | PN_RAMMAP_MPKT(usb_endpoint_maxp(desc));
2053 static int usb3_enable_pipe_n(struct renesas_usb3_ep *usb3_ep,
2054 const struct usb_endpoint_descriptor *desc)
2056 struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
2057 unsigned long flags;
2059 usb3_ep->dir_in = usb_endpoint_dir_in(desc);
2061 spin_lock_irqsave(&usb3->lock, flags);
2062 if (!usb3_pn_change(usb3, usb3_ep->num)) {
2063 usb3_write_pn_mod(usb3_ep, desc);
2064 usb3_write(usb3, usb3_calc_rammap_val(usb3_ep, desc),
2066 usb3_pn_con_clear(usb3);
2067 usb3_set_bit(usb3, PN_CON_EN, USB3_PN_CON);
2069 spin_unlock_irqrestore(&usb3->lock, flags);
2074 static int usb3_disable_pipe_n(struct renesas_usb3_ep *usb3_ep)
2076 struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
2077 unsigned long flags;
2079 usb3_ep->halt = false;
2081 spin_lock_irqsave(&usb3->lock, flags);
2082 if (!usb3_pn_change(usb3, usb3_ep->num)) {
2083 usb3_write(usb3, 0, USB3_PN_INT_ENA);
2084 usb3_write(usb3, 0, USB3_PN_RAMMAP);
2085 usb3_clear_bit(usb3, PN_CON_EN, USB3_PN_CON);
2087 spin_unlock_irqrestore(&usb3->lock, flags);
2092 /*------- usb_ep_ops -----------------------------------------------------*/
2093 static int renesas_usb3_ep_enable(struct usb_ep *_ep,
2094 const struct usb_endpoint_descriptor *desc)
2096 struct renesas_usb3_ep *usb3_ep = usb_ep_to_usb3_ep(_ep);
2098 return usb3_enable_pipe_n(usb3_ep, desc);
2101 static int renesas_usb3_ep_disable(struct usb_ep *_ep)
2103 struct renesas_usb3_ep *usb3_ep = usb_ep_to_usb3_ep(_ep);
2104 struct renesas_usb3_request *usb3_req;
2107 usb3_req = usb3_get_request(usb3_ep);
2110 usb3_dma_try_stop(usb3_ep, usb3_req);
2111 usb3_request_done(usb3_ep, usb3_req, -ESHUTDOWN);
2114 return usb3_disable_pipe_n(usb3_ep);
2117 static struct usb_request *__renesas_usb3_ep_alloc_request(gfp_t gfp_flags)
2119 struct renesas_usb3_request *usb3_req;
2121 usb3_req = kzalloc(sizeof(struct renesas_usb3_request), gfp_flags);
2125 INIT_LIST_HEAD(&usb3_req->queue);
2127 return &usb3_req->req;
2130 static void __renesas_usb3_ep_free_request(struct usb_request *_req)
2132 struct renesas_usb3_request *usb3_req = usb_req_to_usb3_req(_req);
2137 static struct usb_request *renesas_usb3_ep_alloc_request(struct usb_ep *_ep,
2140 return __renesas_usb3_ep_alloc_request(gfp_flags);
2143 static void renesas_usb3_ep_free_request(struct usb_ep *_ep,
2144 struct usb_request *_req)
2146 __renesas_usb3_ep_free_request(_req);
2149 static int renesas_usb3_ep_dequeue(struct usb_ep *_ep, struct usb_request *_req)
2151 struct renesas_usb3_ep *usb3_ep = usb_ep_to_usb3_ep(_ep);
2152 struct renesas_usb3_request *usb3_req = usb_req_to_usb3_req(_req);
2153 struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
2155 dev_dbg(usb3_to_dev(usb3), "ep_dequeue: ep%2d, %u\n", usb3_ep->num,
2158 usb3_dma_try_stop(usb3_ep, usb3_req);
2159 usb3_request_done_pipen(usb3, usb3_ep, usb3_req, -ECONNRESET);
2164 static int renesas_usb3_ep_set_halt(struct usb_ep *_ep, int value)
2166 return usb3_set_halt(usb_ep_to_usb3_ep(_ep), !!value, false);
2169 static int renesas_usb3_ep_set_wedge(struct usb_ep *_ep)
2171 struct renesas_usb3_ep *usb3_ep = usb_ep_to_usb3_ep(_ep);
2173 usb3_ep->wedge = true;
2174 return usb3_set_halt(usb3_ep, true, false);
2177 static void renesas_usb3_ep_fifo_flush(struct usb_ep *_ep)
2179 struct renesas_usb3_ep *usb3_ep = usb_ep_to_usb3_ep(_ep);
2180 struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
2181 unsigned long flags;
2184 spin_lock_irqsave(&usb3->lock, flags);
2185 if (!usb3_pn_change(usb3, usb3_ep->num)) {
2186 usb3_pn_con_clear(usb3);
2187 usb3_set_bit(usb3, PN_CON_EN, USB3_PN_CON);
2189 spin_unlock_irqrestore(&usb3->lock, flags);
2191 usb3_p0_con_clear_buffer(usb3);
2195 static struct usb_ep_ops renesas_usb3_ep_ops = {
2196 .enable = renesas_usb3_ep_enable,
2197 .disable = renesas_usb3_ep_disable,
2199 .alloc_request = renesas_usb3_ep_alloc_request,
2200 .free_request = renesas_usb3_ep_free_request,
2202 .queue = renesas_usb3_ep_queue,
2203 .dequeue = renesas_usb3_ep_dequeue,
2205 .set_halt = renesas_usb3_ep_set_halt,
2206 .set_wedge = renesas_usb3_ep_set_wedge,
2207 .fifo_flush = renesas_usb3_ep_fifo_flush,
2210 /*------- usb_gadget_ops -------------------------------------------------*/
2211 static int renesas_usb3_start(struct usb_gadget *gadget,
2212 struct usb_gadget_driver *driver)
2214 struct renesas_usb3 *usb3;
2216 if (!driver || driver->max_speed < USB_SPEED_FULL ||
2220 usb3 = gadget_to_renesas_usb3(gadget);
2222 /* hook up the driver */
2223 usb3->driver = driver;
2225 pm_runtime_enable(usb3_to_dev(usb3));
2226 pm_runtime_get_sync(usb3_to_dev(usb3));
2228 renesas_usb3_init_controller(usb3);
2233 static int renesas_usb3_stop(struct usb_gadget *gadget)
2235 struct renesas_usb3 *usb3 = gadget_to_renesas_usb3(gadget);
2237 usb3->softconnect = false;
2238 usb3->gadget.speed = USB_SPEED_UNKNOWN;
2239 usb3->driver = NULL;
2240 renesas_usb3_stop_controller(usb3);
2242 pm_runtime_put(usb3_to_dev(usb3));
2243 pm_runtime_disable(usb3_to_dev(usb3));
2248 static int renesas_usb3_get_frame(struct usb_gadget *_gadget)
2253 static int renesas_usb3_pullup(struct usb_gadget *gadget, int is_on)
2255 struct renesas_usb3 *usb3 = gadget_to_renesas_usb3(gadget);
2257 usb3->softconnect = !!is_on;
2262 static int renesas_usb3_set_selfpowered(struct usb_gadget *gadget, int is_self)
2264 gadget->is_selfpowered = !!is_self;
2269 static const struct usb_gadget_ops renesas_usb3_gadget_ops = {
2270 .get_frame = renesas_usb3_get_frame,
2271 .udc_start = renesas_usb3_start,
2272 .udc_stop = renesas_usb3_stop,
2273 .pullup = renesas_usb3_pullup,
2274 .set_selfpowered = renesas_usb3_set_selfpowered,
2277 static ssize_t role_store(struct device *dev, struct device_attribute *attr,
2278 const char *buf, size_t count)
2280 struct renesas_usb3 *usb3 = dev_get_drvdata(dev);
2281 bool new_mode_is_host;
2286 if (!strncmp(buf, "host", strlen("host")))
2287 new_mode_is_host = true;
2288 else if (!strncmp(buf, "peripheral", strlen("peripheral")))
2289 new_mode_is_host = false;
2293 if (new_mode_is_host == usb3_is_host(usb3))
2296 usb3_mode_config(usb3, new_mode_is_host, usb3_is_a_device(usb3));
2301 static ssize_t role_show(struct device *dev, struct device_attribute *attr,
2304 struct renesas_usb3 *usb3 = dev_get_drvdata(dev);
2309 return sprintf(buf, "%s\n", usb3_is_host(usb3) ? "host" : "peripheral");
2311 static DEVICE_ATTR_RW(role);
2313 /*------- platform_driver ------------------------------------------------*/
2314 static int renesas_usb3_remove(struct platform_device *pdev)
2316 struct renesas_usb3 *usb3 = platform_get_drvdata(pdev);
2318 device_remove_file(&pdev->dev, &dev_attr_role);
2320 usb_del_gadget_udc(&usb3->gadget);
2321 renesas_usb3_dma_free_prd(usb3, &pdev->dev);
2323 __renesas_usb3_ep_free_request(usb3->ep0_req);
2328 static int renesas_usb3_init_ep(struct renesas_usb3 *usb3, struct device *dev,
2329 const struct renesas_usb3_priv *priv)
2331 struct renesas_usb3_ep *usb3_ep;
2334 /* calculate num_usb3_eps from renesas_usb3_priv */
2335 usb3->num_usb3_eps = priv->ramsize_per_ramif * priv->num_ramif * 2 /
2336 priv->ramsize_per_pipe + 1;
2338 if (usb3->num_usb3_eps > USB3_MAX_NUM_PIPES)
2339 usb3->num_usb3_eps = USB3_MAX_NUM_PIPES;
2341 usb3->usb3_ep = devm_kzalloc(dev, sizeof(*usb3_ep) * usb3->num_usb3_eps,
2346 dev_dbg(dev, "%s: num_usb3_eps = %d\n", __func__, usb3->num_usb3_eps);
2348 * This driver prepares pipes as follows:
2349 * - odd pipes = IN pipe
2350 * - even pipes = OUT pipe (except pipe 0)
2352 usb3_for_each_ep(usb3_ep, usb3, i) {
2353 snprintf(usb3_ep->ep_name, sizeof(usb3_ep->ep_name), "ep%d", i);
2354 usb3_ep->usb3 = usb3;
2356 usb3_ep->ep.name = usb3_ep->ep_name;
2357 usb3_ep->ep.ops = &renesas_usb3_ep_ops;
2358 INIT_LIST_HEAD(&usb3_ep->queue);
2359 INIT_LIST_HEAD(&usb3_ep->ep.ep_list);
2361 /* for control pipe */
2362 usb3->gadget.ep0 = &usb3_ep->ep;
2363 usb_ep_set_maxpacket_limit(&usb3_ep->ep,
2364 USB3_EP0_HSFS_MAX_PACKET_SIZE);
2365 usb3_ep->ep.caps.type_control = true;
2366 usb3_ep->ep.caps.dir_in = true;
2367 usb3_ep->ep.caps.dir_out = true;
2371 /* for bulk or interrupt pipe */
2372 usb_ep_set_maxpacket_limit(&usb3_ep->ep, ~0);
2373 list_add_tail(&usb3_ep->ep.ep_list, &usb3->gadget.ep_list);
2374 usb3_ep->ep.caps.type_bulk = true;
2375 usb3_ep->ep.caps.type_int = true;
2377 usb3_ep->ep.caps.dir_in = true;
2379 usb3_ep->ep.caps.dir_out = true;
2385 static void renesas_usb3_init_ram(struct renesas_usb3 *usb3, struct device *dev,
2386 const struct renesas_usb3_priv *priv)
2388 struct renesas_usb3_ep *usb3_ep;
2390 u32 ramif[2], basead[2]; /* index 0 = for IN pipes */
2391 u32 *cur_ramif, *cur_basead;
2394 memset(ramif, 0, sizeof(ramif));
2395 memset(basead, 0, sizeof(basead));
2398 * This driver prepares pipes as follows:
2399 * - all pipes = the same size as "ramsize_per_pipe"
2400 * Please refer to the "Method of Specifying RAM Mapping"
2402 usb3_for_each_ep(usb3_ep, usb3, i) {
2404 continue; /* out of scope if ep num = 0 */
2405 if (usb3_ep->ep.caps.dir_in) {
2406 cur_ramif = &ramif[0];
2407 cur_basead = &basead[0];
2409 cur_ramif = &ramif[1];
2410 cur_basead = &basead[1];
2413 if (*cur_basead > priv->ramsize_per_ramif)
2414 continue; /* out of memory for IN or OUT pipe */
2416 /* calculate rammap_val */
2417 val = PN_RAMMAP_RAMIF(*cur_ramif);
2418 val |= usb3_calc_ramarea(priv->ramsize_per_pipe);
2419 val |= PN_RAMMAP_BASEAD(*cur_basead);
2420 usb3_ep->rammap_val = val;
2422 dev_dbg(dev, "ep%2d: val = %08x, ramif = %d, base = %x\n",
2423 i, val, *cur_ramif, *cur_basead);
2425 /* update current ramif */
2426 if (*cur_ramif + 1 == priv->num_ramif) {
2428 *cur_basead += priv->ramsize_per_pipe;
2435 static const struct renesas_usb3_priv renesas_usb3_priv_r8a7795 = {
2436 .ramsize_per_ramif = SZ_16K,
2438 .ramsize_per_pipe = SZ_4K,
2439 .workaround_for_vbus = true,
2442 static const struct of_device_id usb3_of_match[] = {
2444 .compatible = "renesas,r8a7795-usb3-peri",
2445 .data = &renesas_usb3_priv_r8a7795,
2449 MODULE_DEVICE_TABLE(of, usb3_of_match);
2451 static const unsigned int renesas_usb3_cable[] = {
2457 static int renesas_usb3_probe(struct platform_device *pdev)
2459 struct renesas_usb3 *usb3;
2460 struct resource *res;
2461 const struct of_device_id *match;
2463 const struct renesas_usb3_priv *priv;
2465 match = of_match_node(usb3_of_match, pdev->dev.of_node);
2470 irq = platform_get_irq(pdev, 0);
2474 usb3 = devm_kzalloc(&pdev->dev, sizeof(*usb3), GFP_KERNEL);
2478 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2479 usb3->reg = devm_ioremap_resource(&pdev->dev, res);
2480 if (IS_ERR(usb3->reg))
2481 return PTR_ERR(usb3->reg);
2483 platform_set_drvdata(pdev, usb3);
2484 spin_lock_init(&usb3->lock);
2486 usb3->gadget.ops = &renesas_usb3_gadget_ops;
2487 usb3->gadget.name = udc_name;
2488 usb3->gadget.max_speed = USB_SPEED_SUPER;
2489 INIT_LIST_HEAD(&usb3->gadget.ep_list);
2490 ret = renesas_usb3_init_ep(usb3, &pdev->dev, priv);
2493 renesas_usb3_init_ram(usb3, &pdev->dev, priv);
2495 ret = devm_request_irq(&pdev->dev, irq, renesas_usb3_irq, 0,
2496 dev_name(&pdev->dev), usb3);
2500 INIT_WORK(&usb3->extcon_work, renesas_usb3_extcon_work);
2501 usb3->extcon = devm_extcon_dev_allocate(&pdev->dev, renesas_usb3_cable);
2502 if (IS_ERR(usb3->extcon))
2503 return PTR_ERR(usb3->extcon);
2505 ret = devm_extcon_dev_register(&pdev->dev, usb3->extcon);
2507 dev_err(&pdev->dev, "Failed to register extcon\n");
2511 /* for ep0 handling */
2512 usb3->ep0_req = __renesas_usb3_ep_alloc_request(GFP_KERNEL);
2516 ret = renesas_usb3_dma_alloc_prd(usb3, &pdev->dev);
2520 ret = usb_add_gadget_udc(&pdev->dev, &usb3->gadget);
2524 ret = device_create_file(&pdev->dev, &dev_attr_role);
2526 goto err_dev_create;
2528 usb3->workaround_for_vbus = priv->workaround_for_vbus;
2530 dev_info(&pdev->dev, "probed\n");
2535 usb_del_gadget_udc(&usb3->gadget);
2538 renesas_usb3_dma_free_prd(usb3, &pdev->dev);
2541 __renesas_usb3_ep_free_request(usb3->ep0_req);
2546 static struct platform_driver renesas_usb3_driver = {
2547 .probe = renesas_usb3_probe,
2548 .remove = renesas_usb3_remove,
2550 .name = (char *)udc_name,
2551 .of_match_table = of_match_ptr(usb3_of_match),
2554 module_platform_driver(renesas_usb3_driver);
2556 MODULE_DESCRIPTION("Renesas USB3.0 Peripheral driver");
2557 MODULE_LICENSE("GPL v2");
2558 MODULE_AUTHOR("Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>");
2559 MODULE_ALIAS("platform:renesas_usb3");