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, int status)
844 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 spin_lock_irqsave(&usb3->lock, flags);
852 usb3_ep->started = false;
853 list_del_init(&usb3_req->queue);
854 spin_unlock_irqrestore(&usb3->lock, flags);
855 usb_gadget_giveback_request(&usb3_ep->ep, &usb3_req->req);
858 static void usb3_irq_epc_pipe0_status_end(struct renesas_usb3 *usb3)
860 struct renesas_usb3_ep *usb3_ep = usb3_get_ep(usb3, 0);
861 struct renesas_usb3_request *usb3_req = usb3_get_request(usb3_ep);
864 usb3_request_done(usb3_ep, usb3_req, 0);
866 usb3_set_test_mode(usb3);
869 static void usb3_get_setup_data(struct renesas_usb3 *usb3,
870 struct usb_ctrlrequest *ctrl)
872 struct renesas_usb3_ep *usb3_ep = usb3_get_ep(usb3, 0);
873 u32 *data = (u32 *)ctrl;
875 *data++ = usb3_read(usb3, USB3_STUP_DAT_0);
876 *data = usb3_read(usb3, USB3_STUP_DAT_1);
878 /* update this driver's flag */
879 usb3_ep->dir_in = !!(ctrl->bRequestType & USB_DIR_IN);
882 static void usb3_set_p0_con_update_res(struct renesas_usb3 *usb3, u32 res)
884 u32 val = usb3_read(usb3, USB3_P0_CON);
886 val &= ~(P0_CON_ST_RES_MASK | P0_CON_OT_RES_MASK | P0_CON_IN_RES_MASK);
887 val |= res | P0_CON_RES_WEN;
888 usb3_write(usb3, val, USB3_P0_CON);
891 static void usb3_set_p0_con_for_ctrl_read_data(struct renesas_usb3 *usb3)
893 usb3_set_p0_con_update_res(usb3, P0_CON_ST_RES_FORCE_NRDY |
894 P0_CON_OT_RES_FORCE_STALL |
895 P0_CON_IN_RES_NORMAL);
898 static void usb3_set_p0_con_for_ctrl_read_status(struct renesas_usb3 *usb3)
900 usb3_set_p0_con_update_res(usb3, P0_CON_ST_RES_NORMAL |
901 P0_CON_OT_RES_FORCE_STALL |
902 P0_CON_IN_RES_NORMAL);
905 static void usb3_set_p0_con_for_ctrl_write_data(struct renesas_usb3 *usb3)
907 usb3_set_p0_con_update_res(usb3, P0_CON_ST_RES_FORCE_NRDY |
908 P0_CON_OT_RES_NORMAL |
909 P0_CON_IN_RES_FORCE_STALL);
912 static void usb3_set_p0_con_for_ctrl_write_status(struct renesas_usb3 *usb3)
914 usb3_set_p0_con_update_res(usb3, P0_CON_ST_RES_NORMAL |
915 P0_CON_OT_RES_NORMAL |
916 P0_CON_IN_RES_FORCE_STALL);
919 static void usb3_set_p0_con_for_no_data(struct renesas_usb3 *usb3)
921 usb3_set_p0_con_update_res(usb3, P0_CON_ST_RES_NORMAL |
922 P0_CON_OT_RES_FORCE_STALL |
923 P0_CON_IN_RES_FORCE_STALL);
926 static void usb3_set_p0_con_stall(struct renesas_usb3 *usb3)
928 usb3_set_p0_con_update_res(usb3, P0_CON_ST_RES_FORCE_STALL |
929 P0_CON_OT_RES_FORCE_STALL |
930 P0_CON_IN_RES_FORCE_STALL);
933 static void usb3_set_p0_con_stop(struct renesas_usb3 *usb3)
935 usb3_set_p0_con_update_res(usb3, P0_CON_ST_RES_FORCE_NRDY |
936 P0_CON_OT_RES_FORCE_NRDY |
937 P0_CON_IN_RES_FORCE_NRDY);
940 static int usb3_pn_change(struct renesas_usb3 *usb3, int num)
942 if (num == 0 || num > usb3->num_usb3_eps)
945 usb3_write(usb3, num, USB3_PIPE_COM);
950 static void usb3_set_pn_con_update_res(struct renesas_usb3 *usb3, u32 res)
952 u32 val = usb3_read(usb3, USB3_PN_CON);
954 val &= ~PN_CON_RES_MASK;
955 val |= res & PN_CON_RES_MASK;
956 val |= PN_CON_RES_WEN;
957 usb3_write(usb3, val, USB3_PN_CON);
960 static void usb3_pn_start(struct renesas_usb3 *usb3)
962 usb3_set_pn_con_update_res(usb3, PN_CON_RES_NORMAL);
965 static void usb3_pn_stop(struct renesas_usb3 *usb3)
967 usb3_set_pn_con_update_res(usb3, PN_CON_RES_FORCE_NRDY);
970 static void usb3_pn_stall(struct renesas_usb3 *usb3)
972 usb3_set_pn_con_update_res(usb3, PN_CON_RES_FORCE_STALL);
975 static int usb3_pn_con_clear(struct renesas_usb3 *usb3)
977 usb3_set_bit(usb3, PN_CON_CLR, USB3_PN_CON);
979 return usb3_wait(usb3, USB3_PN_CON, PN_CON_CLR, 0);
982 static bool usb3_is_transfer_complete(struct renesas_usb3_ep *usb3_ep,
983 struct renesas_usb3_request *usb3_req)
985 struct usb_request *req = &usb3_req->req;
987 if ((!req->zero && req->actual == req->length) ||
988 (req->actual % usb3_ep->ep.maxpacket) || (req->length == 0))
994 static int usb3_wait_pipe_status(struct renesas_usb3_ep *usb3_ep, u32 mask)
996 struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
997 u32 sta_reg = usb3_ep->num ? USB3_PN_STA : USB3_P0_STA;
999 return usb3_wait(usb3, sta_reg, mask, mask);
1002 static void usb3_set_px_con_send(struct renesas_usb3_ep *usb3_ep, int bytes,
1005 struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
1006 u32 con_reg = usb3_ep->num ? USB3_PN_CON : USB3_P0_CON;
1007 u32 val = usb3_read(usb3, con_reg);
1009 val |= PX_CON_SEND | PX_CON_BYTE_EN_BYTES(bytes);
1010 val |= (usb3_ep->num && last) ? PN_CON_LAST : 0;
1011 usb3_write(usb3, val, con_reg);
1014 static int usb3_write_pipe(struct renesas_usb3_ep *usb3_ep,
1015 struct renesas_usb3_request *usb3_req,
1018 struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
1020 int len = min_t(unsigned, usb3_req->req.length - usb3_req->req.actual,
1021 usb3_ep->ep.maxpacket);
1022 u8 *buf = usb3_req->req.buf + usb3_req->req.actual;
1026 if (usb3_wait_pipe_status(usb3_ep, PX_STA_BUFSTS) < 0)
1029 /* Update gadget driver parameter */
1030 usb3_req->req.actual += len;
1032 /* Write data to the register */
1034 iowrite32_rep(usb3->reg + fifo_reg, buf, len / 4);
1035 buf += (len / 4) * 4;
1036 len %= 4; /* update len to use usb3_set_pX_con_send() */
1040 for (i = 0; i < len; i++)
1041 tmp |= buf[i] << (8 * i);
1042 usb3_write(usb3, tmp, fifo_reg);
1045 is_last = usb3_is_transfer_complete(usb3_ep, usb3_req);
1047 usb3_set_px_con_send(usb3_ep, len, is_last);
1049 return is_last ? 0 : -EAGAIN;
1052 static u32 usb3_get_received_length(struct renesas_usb3_ep *usb3_ep)
1054 struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
1055 u32 lng_reg = usb3_ep->num ? USB3_PN_LNG : USB3_P0_LNG;
1057 return usb3_read(usb3, lng_reg);
1060 static int usb3_read_pipe(struct renesas_usb3_ep *usb3_ep,
1061 struct renesas_usb3_request *usb3_req, u32 fifo_reg)
1063 struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
1065 int len = min_t(unsigned, usb3_req->req.length - usb3_req->req.actual,
1066 usb3_get_received_length(usb3_ep));
1067 u8 *buf = usb3_req->req.buf + usb3_req->req.actual;
1073 /* Update gadget driver parameter */
1074 usb3_req->req.actual += len;
1076 /* Read data from the register */
1078 ioread32_rep(usb3->reg + fifo_reg, buf, len / 4);
1079 buf += (len / 4) * 4;
1084 tmp = usb3_read(usb3, fifo_reg);
1085 for (i = 0; i < len; i++)
1086 buf[i] = (tmp >> (8 * i)) & 0xff;
1089 return usb3_is_transfer_complete(usb3_ep, usb3_req) ? 0 : -EAGAIN;
1092 static void usb3_set_status_stage(struct renesas_usb3_ep *usb3_ep,
1093 struct renesas_usb3_request *usb3_req)
1095 struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
1097 if (usb3_ep->dir_in) {
1098 usb3_set_p0_con_for_ctrl_read_status(usb3);
1100 if (!usb3_req->req.length)
1101 usb3_set_p0_con_for_no_data(usb3);
1103 usb3_set_p0_con_for_ctrl_write_status(usb3);
1107 static void usb3_p0_xfer(struct renesas_usb3_ep *usb3_ep,
1108 struct renesas_usb3_request *usb3_req)
1112 if (usb3_ep->dir_in)
1113 ret = usb3_write_pipe(usb3_ep, usb3_req, USB3_P0_WRITE);
1115 ret = usb3_read_pipe(usb3_ep, usb3_req, USB3_P0_READ);
1118 usb3_set_status_stage(usb3_ep, usb3_req);
1121 static void usb3_start_pipe0(struct renesas_usb3_ep *usb3_ep,
1122 struct renesas_usb3_request *usb3_req)
1124 struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
1126 if (usb3_ep->started)
1129 usb3_ep->started = true;
1131 if (usb3_ep->dir_in) {
1132 usb3_set_bit(usb3, P0_MOD_DIR, USB3_P0_MOD);
1133 usb3_set_p0_con_for_ctrl_read_data(usb3);
1135 usb3_clear_bit(usb3, P0_MOD_DIR, USB3_P0_MOD);
1136 usb3_set_p0_con_for_ctrl_write_data(usb3);
1139 usb3_p0_xfer(usb3_ep, usb3_req);
1142 static void usb3_enable_dma_pipen(struct renesas_usb3 *usb3)
1144 usb3_set_bit(usb3, PN_CON_DATAIF_EN, USB3_PN_CON);
1147 static void usb3_disable_dma_pipen(struct renesas_usb3 *usb3)
1149 usb3_clear_bit(usb3, PN_CON_DATAIF_EN, USB3_PN_CON);
1152 static void usb3_enable_dma_irq(struct renesas_usb3 *usb3, int num)
1154 usb3_set_bit(usb3, DMA_INT(num), USB3_DMA_INT_ENA);
1157 static void usb3_disable_dma_irq(struct renesas_usb3 *usb3, int num)
1159 usb3_clear_bit(usb3, DMA_INT(num), USB3_DMA_INT_ENA);
1162 static u32 usb3_dma_mps_to_prd_word1(struct renesas_usb3_ep *usb3_ep)
1164 switch (usb3_ep->ep.maxpacket) {
1166 return USB3_PRD1_MPS_8;
1168 return USB3_PRD1_MPS_16;
1170 return USB3_PRD1_MPS_32;
1172 return USB3_PRD1_MPS_64;
1174 return USB3_PRD1_MPS_512;
1176 return USB3_PRD1_MPS_1024;
1178 return USB3_PRD1_MPS_RESERVED;
1182 static bool usb3_dma_get_setting_area(struct renesas_usb3_ep *usb3_ep,
1183 struct renesas_usb3_request *usb3_req)
1185 struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
1186 struct renesas_usb3_dma *dma;
1190 if (usb3_req->req.length > USB3_DMA_MAX_XFER_SIZE_ALL_PRDS) {
1191 dev_dbg(usb3_to_dev(usb3), "%s: the length is too big (%d)\n",
1192 __func__, usb3_req->req.length);
1196 /* The driver doesn't handle zero-length packet via dmac */
1197 if (!usb3_req->req.length)
1200 if (usb3_dma_mps_to_prd_word1(usb3_ep) == USB3_PRD1_MPS_RESERVED)
1203 usb3_for_each_dma(usb3, dma, i) {
1207 if (usb_gadget_map_request(&usb3->gadget, &usb3_req->req,
1208 usb3_ep->dir_in) < 0)
1220 static void usb3_dma_put_setting_area(struct renesas_usb3_ep *usb3_ep,
1221 struct renesas_usb3_request *usb3_req)
1223 struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
1225 struct renesas_usb3_dma *dma;
1227 usb3_for_each_dma(usb3, dma, i) {
1228 if (usb3_ep->dma == dma) {
1229 usb_gadget_unmap_request(&usb3->gadget, &usb3_req->req,
1232 usb3_ep->dma = NULL;
1238 static void usb3_dma_fill_prd(struct renesas_usb3_ep *usb3_ep,
1239 struct renesas_usb3_request *usb3_req)
1241 struct renesas_usb3_prd *cur_prd = usb3_ep->dma->prd;
1242 u32 remain = usb3_req->req.length;
1243 u32 dma = usb3_req->req.dma;
1248 len = min_t(u32, remain, USB3_DMA_MAX_XFER_SIZE) &
1249 USB3_PRD1_SIZE_MASK;
1250 cur_prd->word1 = usb3_dma_mps_to_prd_word1(usb3_ep) |
1251 USB3_PRD1_B_INC | len;
1255 if (!remain || (i + 1) < USB3_DMA_NUM_PRD_ENTRIES)
1262 cur_prd->word1 |= USB3_PRD1_E | USB3_PRD1_INT;
1263 if (usb3_ep->dir_in)
1264 cur_prd->word1 |= USB3_PRD1_LST;
1267 static void usb3_dma_kick_prd(struct renesas_usb3_ep *usb3_ep)
1269 struct renesas_usb3_dma *dma = usb3_ep->dma;
1270 struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
1271 u32 dma_con = DMA_COM_PIPE_NO(usb3_ep->num) | DMA_CON_PRD_EN;
1273 if (usb3_ep->dir_in)
1274 dma_con |= DMA_CON_PIPE_DIR;
1276 wmb(); /* prd entries should be in system memory here */
1278 usb3_write(usb3, 1 << usb3_ep->num, USB3_DMA_INT_STA);
1279 usb3_write(usb3, AXI_INT_PRDEN_CLR_STA(dma->num) |
1280 AXI_INT_PRDERR_STA(dma->num), USB3_AXI_INT_STA);
1282 usb3_write(usb3, dma->prd_dma, USB3_DMA_CH0_PRD_ADR(dma->num));
1283 usb3_write(usb3, dma_con, USB3_DMA_CH0_CON(dma->num));
1284 usb3_enable_dma_irq(usb3, usb3_ep->num);
1287 static void usb3_dma_stop_prd(struct renesas_usb3_ep *usb3_ep)
1289 struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
1290 struct renesas_usb3_dma *dma = usb3_ep->dma;
1292 usb3_disable_dma_irq(usb3, usb3_ep->num);
1293 usb3_write(usb3, 0, USB3_DMA_CH0_CON(dma->num));
1296 static int usb3_dma_update_status(struct renesas_usb3_ep *usb3_ep,
1297 struct renesas_usb3_request *usb3_req)
1299 struct renesas_usb3_prd *cur_prd = usb3_ep->dma->prd;
1300 struct usb_request *req = &usb3_req->req;
1305 rmb(); /* The controller updated prd entries */
1308 if (cur_prd->word1 & USB3_PRD1_D)
1310 if (cur_prd->word1 & USB3_PRD1_E)
1311 len = req->length % USB3_DMA_MAX_XFER_SIZE;
1313 len = USB3_DMA_MAX_XFER_SIZE;
1314 remain = cur_prd->word1 & USB3_PRD1_SIZE_MASK;
1315 req->actual += len - remain;
1317 if (cur_prd->word1 & USB3_PRD1_E ||
1318 (i + 1) < USB3_DMA_NUM_PRD_ENTRIES)
1328 static bool usb3_dma_try_start(struct renesas_usb3_ep *usb3_ep,
1329 struct renesas_usb3_request *usb3_req)
1331 struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
1336 if (usb3_dma_get_setting_area(usb3_ep, usb3_req)) {
1338 usb3_enable_dma_pipen(usb3);
1339 usb3_dma_fill_prd(usb3_ep, usb3_req);
1340 usb3_dma_kick_prd(usb3_ep);
1341 usb3_pn_start(usb3);
1348 static int usb3_dma_try_stop(struct renesas_usb3_ep *usb3_ep,
1349 struct renesas_usb3_request *usb3_req)
1351 struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
1352 unsigned long flags;
1355 spin_lock_irqsave(&usb3->lock, flags);
1359 if (!usb3_pn_change(usb3, usb3_ep->num))
1360 usb3_disable_dma_pipen(usb3);
1361 usb3_dma_stop_prd(usb3_ep);
1362 status = usb3_dma_update_status(usb3_ep, usb3_req);
1363 usb3_dma_put_setting_area(usb3_ep, usb3_req);
1366 spin_unlock_irqrestore(&usb3->lock, flags);
1370 static int renesas_usb3_dma_free_prd(struct renesas_usb3 *usb3,
1374 struct renesas_usb3_dma *dma;
1376 usb3_for_each_dma(usb3, dma, i) {
1378 dma_free_coherent(dev, USB3_DMA_PRD_SIZE,
1379 dma->prd, dma->prd_dma);
1387 static int renesas_usb3_dma_alloc_prd(struct renesas_usb3 *usb3,
1391 struct renesas_usb3_dma *dma;
1396 usb3_for_each_dma(usb3, dma, i) {
1397 dma->prd = dma_alloc_coherent(dev, USB3_DMA_PRD_SIZE,
1398 &dma->prd_dma, GFP_KERNEL);
1400 renesas_usb3_dma_free_prd(usb3, dev);
1409 static void usb3_start_pipen(struct renesas_usb3_ep *usb3_ep,
1410 struct renesas_usb3_request *usb3_req)
1412 struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
1413 struct renesas_usb3_request *usb3_req_first = usb3_get_request(usb3_ep);
1414 unsigned long flags;
1416 u32 enable_bits = 0;
1418 spin_lock_irqsave(&usb3->lock, flags);
1419 if (usb3_ep->halt || usb3_ep->started)
1421 if (usb3_req != usb3_req_first)
1424 if (usb3_pn_change(usb3, usb3_ep->num) < 0)
1427 usb3_ep->started = true;
1429 if (usb3_dma_try_start(usb3_ep, usb3_req))
1432 usb3_pn_start(usb3);
1434 if (usb3_ep->dir_in) {
1435 ret = usb3_write_pipe(usb3_ep, usb3_req, USB3_PN_WRITE);
1436 enable_bits |= PN_INT_LSTTR;
1440 enable_bits |= PN_INT_BFRDY;
1443 usb3_set_bit(usb3, enable_bits, USB3_PN_INT_ENA);
1444 usb3_enable_pipe_irq(usb3, usb3_ep->num);
1447 spin_unlock_irqrestore(&usb3->lock, flags);
1450 static int renesas_usb3_ep_queue(struct usb_ep *_ep, struct usb_request *_req,
1453 struct renesas_usb3_ep *usb3_ep = usb_ep_to_usb3_ep(_ep);
1454 struct renesas_usb3_request *usb3_req = usb_req_to_usb3_req(_req);
1455 struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
1456 unsigned long flags;
1458 dev_dbg(usb3_to_dev(usb3), "ep_queue: ep%2d, %u\n", usb3_ep->num,
1461 _req->status = -EINPROGRESS;
1463 spin_lock_irqsave(&usb3->lock, flags);
1464 list_add_tail(&usb3_req->queue, &usb3_ep->queue);
1465 spin_unlock_irqrestore(&usb3->lock, flags);
1468 usb3_start_pipe0(usb3_ep, usb3_req);
1470 usb3_start_pipen(usb3_ep, usb3_req);
1475 static void usb3_set_device_address(struct renesas_usb3 *usb3, u16 addr)
1477 /* DEV_ADDR bit field is cleared by WarmReset, HotReset and BusReset */
1478 usb3_set_bit(usb3, USB_COM_CON_DEV_ADDR(addr), USB3_USB_COM_CON);
1481 static bool usb3_std_req_set_address(struct renesas_usb3 *usb3,
1482 struct usb_ctrlrequest *ctrl)
1484 if (ctrl->wValue >= 128)
1485 return true; /* stall */
1487 usb3_set_device_address(usb3, ctrl->wValue);
1488 usb3_set_p0_con_for_no_data(usb3);
1493 static void usb3_pipe0_internal_xfer(struct renesas_usb3 *usb3,
1494 void *tx_data, size_t len,
1495 void (*complete)(struct usb_ep *ep,
1496 struct usb_request *req))
1498 struct renesas_usb3_ep *usb3_ep = usb3_get_ep(usb3, 0);
1501 memcpy(usb3->ep0_buf, tx_data,
1502 min_t(size_t, len, USB3_EP0_BUF_SIZE));
1504 usb3->ep0_req->buf = &usb3->ep0_buf;
1505 usb3->ep0_req->length = len;
1506 usb3->ep0_req->complete = complete;
1507 renesas_usb3_ep_queue(&usb3_ep->ep, usb3->ep0_req, GFP_ATOMIC);
1510 static void usb3_pipe0_get_status_completion(struct usb_ep *ep,
1511 struct usb_request *req)
1515 static bool usb3_std_req_get_status(struct renesas_usb3 *usb3,
1516 struct usb_ctrlrequest *ctrl)
1519 struct renesas_usb3_ep *usb3_ep;
1523 switch (ctrl->bRequestType & USB_RECIP_MASK) {
1524 case USB_RECIP_DEVICE:
1525 if (usb3->gadget.is_selfpowered)
1526 status |= 1 << USB_DEVICE_SELF_POWERED;
1527 if (usb3->gadget.speed == USB_SPEED_SUPER)
1528 status |= usb3_feature_get_un_enabled(usb3);
1530 case USB_RECIP_INTERFACE:
1532 case USB_RECIP_ENDPOINT:
1533 num = le16_to_cpu(ctrl->wIndex) & USB_ENDPOINT_NUMBER_MASK;
1534 usb3_ep = usb3_get_ep(usb3, num);
1536 status |= 1 << USB_ENDPOINT_HALT;
1544 status = cpu_to_le16(status);
1545 dev_dbg(usb3_to_dev(usb3), "get_status: req = %p\n",
1546 usb_req_to_usb3_req(usb3->ep0_req));
1547 usb3_pipe0_internal_xfer(usb3, &status, sizeof(status),
1548 usb3_pipe0_get_status_completion);
1554 static bool usb3_std_req_feature_device(struct renesas_usb3 *usb3,
1555 struct usb_ctrlrequest *ctrl, bool set)
1558 u16 w_value = le16_to_cpu(ctrl->wValue);
1561 case USB_DEVICE_TEST_MODE:
1564 usb3->test_mode = le16_to_cpu(ctrl->wIndex) >> 8;
1567 case USB_DEVICE_U1_ENABLE:
1568 case USB_DEVICE_U2_ENABLE:
1569 if (usb3->gadget.speed != USB_SPEED_SUPER)
1571 if (w_value == USB_DEVICE_U1_ENABLE)
1572 usb3_feature_u1_enable(usb3, set);
1573 if (w_value == USB_DEVICE_U2_ENABLE)
1574 usb3_feature_u2_enable(usb3, set);
1584 static int usb3_set_halt_p0(struct renesas_usb3_ep *usb3_ep, bool halt)
1586 struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
1588 if (unlikely(usb3_ep->num))
1591 usb3_ep->halt = halt;
1593 usb3_set_p0_con_stall(usb3);
1595 usb3_set_p0_con_stop(usb3);
1600 static int usb3_set_halt_pn(struct renesas_usb3_ep *usb3_ep, bool halt,
1601 bool is_clear_feature)
1603 struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
1604 unsigned long flags;
1606 spin_lock_irqsave(&usb3->lock, flags);
1607 if (!usb3_pn_change(usb3, usb3_ep->num)) {
1608 usb3_ep->halt = halt;
1610 usb3_pn_stall(usb3);
1611 } else if (!is_clear_feature || !usb3_ep->wedge) {
1612 usb3_pn_con_clear(usb3);
1613 usb3_set_bit(usb3, PN_CON_EN, USB3_PN_CON);
1617 spin_unlock_irqrestore(&usb3->lock, flags);
1622 static int usb3_set_halt(struct renesas_usb3_ep *usb3_ep, bool halt,
1623 bool is_clear_feature)
1627 if (halt && usb3_ep->started)
1631 ret = usb3_set_halt_pn(usb3_ep, halt, is_clear_feature);
1633 ret = usb3_set_halt_p0(usb3_ep, halt);
1638 static bool usb3_std_req_feature_endpoint(struct renesas_usb3 *usb3,
1639 struct usb_ctrlrequest *ctrl,
1642 int num = le16_to_cpu(ctrl->wIndex) & USB_ENDPOINT_NUMBER_MASK;
1643 struct renesas_usb3_ep *usb3_ep;
1644 struct renesas_usb3_request *usb3_req;
1646 if (le16_to_cpu(ctrl->wValue) != USB_ENDPOINT_HALT)
1647 return true; /* stall */
1649 usb3_ep = usb3_get_ep(usb3, num);
1650 usb3_set_halt(usb3_ep, set, true);
1652 /* Restarts a queue if clear feature */
1654 usb3_ep->started = false;
1655 usb3_req = usb3_get_request(usb3_ep);
1657 usb3_start_pipen(usb3_ep, usb3_req);
1663 static bool usb3_std_req_feature(struct renesas_usb3 *usb3,
1664 struct usb_ctrlrequest *ctrl, bool set)
1668 switch (ctrl->bRequestType & USB_RECIP_MASK) {
1669 case USB_RECIP_DEVICE:
1670 stall = usb3_std_req_feature_device(usb3, ctrl, set);
1672 case USB_RECIP_INTERFACE:
1674 case USB_RECIP_ENDPOINT:
1675 stall = usb3_std_req_feature_endpoint(usb3, ctrl, set);
1683 usb3_set_p0_con_for_no_data(usb3);
1688 static void usb3_pipe0_set_sel_completion(struct usb_ep *ep,
1689 struct usb_request *req)
1694 static bool usb3_std_req_set_sel(struct renesas_usb3 *usb3,
1695 struct usb_ctrlrequest *ctrl)
1697 u16 w_length = le16_to_cpu(ctrl->wLength);
1700 return true; /* stall */
1702 dev_dbg(usb3_to_dev(usb3), "set_sel: req = %p\n",
1703 usb_req_to_usb3_req(usb3->ep0_req));
1704 usb3_pipe0_internal_xfer(usb3, NULL, 6, usb3_pipe0_set_sel_completion);
1709 static bool usb3_std_req_set_configuration(struct renesas_usb3 *usb3,
1710 struct usb_ctrlrequest *ctrl)
1712 if (ctrl->wValue > 0)
1713 usb3_set_bit(usb3, USB_COM_CON_CONF, USB3_USB_COM_CON);
1715 usb3_clear_bit(usb3, USB_COM_CON_CONF, USB3_USB_COM_CON);
1721 * usb3_handle_standard_request - handle some standard requests
1722 * @usb3: the renesas_usb3 pointer
1723 * @ctrl: a pointer of setup data
1725 * Returns true if this function handled a standard request
1727 static bool usb3_handle_standard_request(struct renesas_usb3 *usb3,
1728 struct usb_ctrlrequest *ctrl)
1733 if ((ctrl->bRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD) {
1734 switch (ctrl->bRequest) {
1735 case USB_REQ_SET_ADDRESS:
1736 stall = usb3_std_req_set_address(usb3, ctrl);
1739 case USB_REQ_GET_STATUS:
1740 stall = usb3_std_req_get_status(usb3, ctrl);
1743 case USB_REQ_CLEAR_FEATURE:
1744 stall = usb3_std_req_feature(usb3, ctrl, false);
1747 case USB_REQ_SET_FEATURE:
1748 stall = usb3_std_req_feature(usb3, ctrl, true);
1751 case USB_REQ_SET_SEL:
1752 stall = usb3_std_req_set_sel(usb3, ctrl);
1755 case USB_REQ_SET_ISOCH_DELAY:
1756 /* This hardware doesn't support Isochronous xfer */
1760 case USB_REQ_SET_CONFIGURATION:
1761 usb3_std_req_set_configuration(usb3, ctrl);
1769 usb3_set_p0_con_stall(usb3);
1774 static int usb3_p0_con_clear_buffer(struct renesas_usb3 *usb3)
1776 usb3_set_bit(usb3, P0_CON_BCLR, USB3_P0_CON);
1778 return usb3_wait(usb3, USB3_P0_CON, P0_CON_BCLR, 0);
1781 static void usb3_irq_epc_pipe0_setup(struct renesas_usb3 *usb3)
1783 struct usb_ctrlrequest ctrl;
1784 struct renesas_usb3_ep *usb3_ep = usb3_get_ep(usb3, 0);
1786 /* Call giveback function if previous transfer is not completed */
1787 if (usb3_ep->started)
1788 usb3_request_done(usb3_ep, usb3_get_request(usb3_ep),
1791 usb3_p0_con_clear_buffer(usb3);
1792 usb3_get_setup_data(usb3, &ctrl);
1793 if (!usb3_handle_standard_request(usb3, &ctrl))
1794 if (usb3->driver->setup(&usb3->gadget, &ctrl) < 0)
1795 usb3_set_p0_con_stall(usb3);
1798 static void usb3_irq_epc_pipe0_bfrdy(struct renesas_usb3 *usb3)
1800 struct renesas_usb3_ep *usb3_ep = usb3_get_ep(usb3, 0);
1801 struct renesas_usb3_request *usb3_req = usb3_get_request(usb3_ep);
1806 usb3_p0_xfer(usb3_ep, usb3_req);
1809 static void usb3_irq_epc_pipe0(struct renesas_usb3 *usb3)
1811 u32 p0_int_sta = usb3_read(usb3, USB3_P0_INT_STA);
1813 p0_int_sta &= usb3_read(usb3, USB3_P0_INT_ENA);
1814 usb3_write(usb3, p0_int_sta, USB3_P0_INT_STA);
1815 if (p0_int_sta & P0_INT_STSED)
1816 usb3_irq_epc_pipe0_status_end(usb3);
1817 if (p0_int_sta & P0_INT_SETUP)
1818 usb3_irq_epc_pipe0_setup(usb3);
1819 if (p0_int_sta & P0_INT_BFRDY)
1820 usb3_irq_epc_pipe0_bfrdy(usb3);
1823 static void usb3_request_done_pipen(struct renesas_usb3 *usb3,
1824 struct renesas_usb3_ep *usb3_ep,
1825 struct renesas_usb3_request *usb3_req,
1828 unsigned long flags;
1830 spin_lock_irqsave(&usb3->lock, flags);
1831 if (usb3_pn_change(usb3, usb3_ep->num))
1833 spin_unlock_irqrestore(&usb3->lock, flags);
1835 usb3_disable_pipe_irq(usb3, usb3_ep->num);
1836 usb3_request_done(usb3_ep, usb3_req, status);
1838 /* get next usb3_req */
1839 usb3_req = usb3_get_request(usb3_ep);
1841 usb3_start_pipen(usb3_ep, usb3_req);
1844 static void usb3_irq_epc_pipen_lsttr(struct renesas_usb3 *usb3, int num)
1846 struct renesas_usb3_ep *usb3_ep = usb3_get_ep(usb3, num);
1847 struct renesas_usb3_request *usb3_req = usb3_get_request(usb3_ep);
1852 if (usb3_ep->dir_in) {
1853 dev_dbg(usb3_to_dev(usb3), "%s: len = %u, actual = %u\n",
1854 __func__, usb3_req->req.length, usb3_req->req.actual);
1855 usb3_request_done_pipen(usb3, usb3_ep, usb3_req, 0);
1859 static void usb3_irq_epc_pipen_bfrdy(struct renesas_usb3 *usb3, int num)
1861 struct renesas_usb3_ep *usb3_ep = usb3_get_ep(usb3, num);
1862 struct renesas_usb3_request *usb3_req = usb3_get_request(usb3_ep);
1868 spin_lock(&usb3->lock);
1869 if (usb3_pn_change(usb3, num))
1872 if (usb3_ep->dir_in) {
1873 /* Do not stop the IN pipe here to detect LSTTR interrupt */
1874 if (!usb3_write_pipe(usb3_ep, usb3_req, USB3_PN_WRITE))
1875 usb3_clear_bit(usb3, PN_INT_BFRDY, USB3_PN_INT_ENA);
1877 if (!usb3_read_pipe(usb3_ep, usb3_req, USB3_PN_READ))
1882 /* need to unlock because usb3_request_done_pipen() locks it */
1883 spin_unlock(&usb3->lock);
1886 usb3_request_done_pipen(usb3, usb3_ep, usb3_req, 0);
1889 static void usb3_irq_epc_pipen(struct renesas_usb3 *usb3, int num)
1893 spin_lock(&usb3->lock);
1894 if (usb3_pn_change(usb3, num) < 0) {
1895 spin_unlock(&usb3->lock);
1899 pn_int_sta = usb3_read(usb3, USB3_PN_INT_STA);
1900 pn_int_sta &= usb3_read(usb3, USB3_PN_INT_ENA);
1901 usb3_write(usb3, pn_int_sta, USB3_PN_INT_STA);
1902 spin_unlock(&usb3->lock);
1903 if (pn_int_sta & PN_INT_LSTTR)
1904 usb3_irq_epc_pipen_lsttr(usb3, num);
1905 if (pn_int_sta & PN_INT_BFRDY)
1906 usb3_irq_epc_pipen_bfrdy(usb3, num);
1909 static void usb3_irq_epc_int_2(struct renesas_usb3 *usb3, u32 int_sta_2)
1913 for (i = 0; i < usb3->num_usb3_eps; i++) {
1914 if (int_sta_2 & USB_INT_2_PIPE(i)) {
1916 usb3_irq_epc_pipe0(usb3);
1918 usb3_irq_epc_pipen(usb3, i);
1923 static void usb3_irq_idmon_change(struct renesas_usb3 *usb3)
1925 usb3_check_id(usb3);
1928 static void usb3_irq_otg_int(struct renesas_usb3 *usb3, u32 otg_int_sta)
1930 if (otg_int_sta & USB_OTG_IDMON)
1931 usb3_irq_idmon_change(usb3);
1934 static void usb3_irq_epc(struct renesas_usb3 *usb3)
1936 u32 int_sta_1 = usb3_read(usb3, USB3_USB_INT_STA_1);
1937 u32 int_sta_2 = usb3_read(usb3, USB3_USB_INT_STA_2);
1938 u32 otg_int_sta = usb3_read(usb3, USB3_USB_OTG_INT_STA);
1940 int_sta_1 &= usb3_read(usb3, USB3_USB_INT_ENA_1);
1942 usb3_write(usb3, int_sta_1, USB3_USB_INT_STA_1);
1943 usb3_irq_epc_int_1(usb3, int_sta_1);
1946 int_sta_2 &= usb3_read(usb3, USB3_USB_INT_ENA_2);
1948 usb3_irq_epc_int_2(usb3, int_sta_2);
1950 otg_int_sta &= usb3_read(usb3, USB3_USB_OTG_INT_ENA);
1952 usb3_write(usb3, otg_int_sta, USB3_USB_OTG_INT_STA);
1953 usb3_irq_otg_int(usb3, otg_int_sta);
1957 static void usb3_irq_dma_int(struct renesas_usb3 *usb3, u32 dma_sta)
1959 struct renesas_usb3_ep *usb3_ep;
1960 struct renesas_usb3_request *usb3_req;
1963 for (i = 0; i < usb3->num_usb3_eps; i++) {
1964 if (!(dma_sta & DMA_INT(i)))
1967 usb3_ep = usb3_get_ep(usb3, i);
1968 if (!(usb3_read(usb3, USB3_AXI_INT_STA) &
1969 AXI_INT_PRDEN_CLR_STA(usb3_ep->dma->num)))
1972 usb3_req = usb3_get_request(usb3_ep);
1973 status = usb3_dma_try_stop(usb3_ep, usb3_req);
1974 usb3_request_done_pipen(usb3, usb3_ep, usb3_req, status);
1978 static void usb3_irq_dma(struct renesas_usb3 *usb3)
1980 u32 dma_sta = usb3_read(usb3, USB3_DMA_INT_STA);
1982 dma_sta &= usb3_read(usb3, USB3_DMA_INT_ENA);
1984 usb3_write(usb3, dma_sta, USB3_DMA_INT_STA);
1985 usb3_irq_dma_int(usb3, dma_sta);
1989 static irqreturn_t renesas_usb3_irq(int irq, void *_usb3)
1991 struct renesas_usb3 *usb3 = _usb3;
1992 irqreturn_t ret = IRQ_NONE;
1993 u32 axi_int_sta = usb3_read(usb3, USB3_AXI_INT_STA);
1995 if (axi_int_sta & AXI_INT_DMAINT) {
2000 if (axi_int_sta & AXI_INT_EPCINT) {
2008 static void usb3_write_pn_mod(struct renesas_usb3_ep *usb3_ep,
2009 const struct usb_endpoint_descriptor *desc)
2011 struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
2014 val |= usb3_ep->dir_in ? PN_MOD_DIR : 0;
2015 val |= PN_MOD_TYPE(usb_endpoint_type(desc));
2016 val |= PN_MOD_EPNUM(usb_endpoint_num(desc));
2017 usb3_write(usb3, val, USB3_PN_MOD);
2020 static u32 usb3_calc_ramarea(int ram_size)
2022 WARN_ON(ram_size > SZ_16K);
2024 if (ram_size <= SZ_1K)
2025 return PN_RAMMAP_RAMAREA_1KB;
2026 else if (ram_size <= SZ_2K)
2027 return PN_RAMMAP_RAMAREA_2KB;
2028 else if (ram_size <= SZ_4K)
2029 return PN_RAMMAP_RAMAREA_4KB;
2030 else if (ram_size <= SZ_8K)
2031 return PN_RAMMAP_RAMAREA_8KB;
2033 return PN_RAMMAP_RAMAREA_16KB;
2036 static u32 usb3_calc_rammap_val(struct renesas_usb3_ep *usb3_ep,
2037 const struct usb_endpoint_descriptor *desc)
2039 return usb3_ep->rammap_val | PN_RAMMAP_MPKT(usb_endpoint_maxp(desc));
2042 static int usb3_enable_pipe_n(struct renesas_usb3_ep *usb3_ep,
2043 const struct usb_endpoint_descriptor *desc)
2045 struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
2046 unsigned long flags;
2048 usb3_ep->dir_in = usb_endpoint_dir_in(desc);
2050 spin_lock_irqsave(&usb3->lock, flags);
2051 if (!usb3_pn_change(usb3, usb3_ep->num)) {
2052 usb3_write_pn_mod(usb3_ep, desc);
2053 usb3_write(usb3, usb3_calc_rammap_val(usb3_ep, desc),
2055 usb3_pn_con_clear(usb3);
2056 usb3_set_bit(usb3, PN_CON_EN, USB3_PN_CON);
2058 spin_unlock_irqrestore(&usb3->lock, flags);
2063 static int usb3_disable_pipe_n(struct renesas_usb3_ep *usb3_ep)
2065 struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
2066 unsigned long flags;
2068 usb3_ep->halt = false;
2070 spin_lock_irqsave(&usb3->lock, flags);
2071 if (!usb3_pn_change(usb3, usb3_ep->num)) {
2072 usb3_write(usb3, 0, USB3_PN_INT_ENA);
2073 usb3_write(usb3, 0, USB3_PN_RAMMAP);
2074 usb3_clear_bit(usb3, PN_CON_EN, USB3_PN_CON);
2076 spin_unlock_irqrestore(&usb3->lock, flags);
2081 /*------- usb_ep_ops -----------------------------------------------------*/
2082 static int renesas_usb3_ep_enable(struct usb_ep *_ep,
2083 const struct usb_endpoint_descriptor *desc)
2085 struct renesas_usb3_ep *usb3_ep = usb_ep_to_usb3_ep(_ep);
2087 return usb3_enable_pipe_n(usb3_ep, desc);
2090 static int renesas_usb3_ep_disable(struct usb_ep *_ep)
2092 struct renesas_usb3_ep *usb3_ep = usb_ep_to_usb3_ep(_ep);
2093 struct renesas_usb3_request *usb3_req;
2096 usb3_req = usb3_get_request(usb3_ep);
2099 usb3_dma_try_stop(usb3_ep, usb3_req);
2100 usb3_request_done(usb3_ep, usb3_req, -ESHUTDOWN);
2103 return usb3_disable_pipe_n(usb3_ep);
2106 static struct usb_request *__renesas_usb3_ep_alloc_request(gfp_t gfp_flags)
2108 struct renesas_usb3_request *usb3_req;
2110 usb3_req = kzalloc(sizeof(struct renesas_usb3_request), gfp_flags);
2114 INIT_LIST_HEAD(&usb3_req->queue);
2116 return &usb3_req->req;
2119 static void __renesas_usb3_ep_free_request(struct usb_request *_req)
2121 struct renesas_usb3_request *usb3_req = usb_req_to_usb3_req(_req);
2126 static struct usb_request *renesas_usb3_ep_alloc_request(struct usb_ep *_ep,
2129 return __renesas_usb3_ep_alloc_request(gfp_flags);
2132 static void renesas_usb3_ep_free_request(struct usb_ep *_ep,
2133 struct usb_request *_req)
2135 __renesas_usb3_ep_free_request(_req);
2138 static int renesas_usb3_ep_dequeue(struct usb_ep *_ep, struct usb_request *_req)
2140 struct renesas_usb3_ep *usb3_ep = usb_ep_to_usb3_ep(_ep);
2141 struct renesas_usb3_request *usb3_req = usb_req_to_usb3_req(_req);
2142 struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
2144 dev_dbg(usb3_to_dev(usb3), "ep_dequeue: ep%2d, %u\n", usb3_ep->num,
2147 usb3_dma_try_stop(usb3_ep, usb3_req);
2148 usb3_request_done_pipen(usb3, usb3_ep, usb3_req, -ECONNRESET);
2153 static int renesas_usb3_ep_set_halt(struct usb_ep *_ep, int value)
2155 return usb3_set_halt(usb_ep_to_usb3_ep(_ep), !!value, false);
2158 static int renesas_usb3_ep_set_wedge(struct usb_ep *_ep)
2160 struct renesas_usb3_ep *usb3_ep = usb_ep_to_usb3_ep(_ep);
2162 usb3_ep->wedge = true;
2163 return usb3_set_halt(usb3_ep, true, false);
2166 static void renesas_usb3_ep_fifo_flush(struct usb_ep *_ep)
2168 struct renesas_usb3_ep *usb3_ep = usb_ep_to_usb3_ep(_ep);
2169 struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
2170 unsigned long flags;
2173 spin_lock_irqsave(&usb3->lock, flags);
2174 if (!usb3_pn_change(usb3, usb3_ep->num)) {
2175 usb3_pn_con_clear(usb3);
2176 usb3_set_bit(usb3, PN_CON_EN, USB3_PN_CON);
2178 spin_unlock_irqrestore(&usb3->lock, flags);
2180 usb3_p0_con_clear_buffer(usb3);
2184 static struct usb_ep_ops renesas_usb3_ep_ops = {
2185 .enable = renesas_usb3_ep_enable,
2186 .disable = renesas_usb3_ep_disable,
2188 .alloc_request = renesas_usb3_ep_alloc_request,
2189 .free_request = renesas_usb3_ep_free_request,
2191 .queue = renesas_usb3_ep_queue,
2192 .dequeue = renesas_usb3_ep_dequeue,
2194 .set_halt = renesas_usb3_ep_set_halt,
2195 .set_wedge = renesas_usb3_ep_set_wedge,
2196 .fifo_flush = renesas_usb3_ep_fifo_flush,
2199 /*------- usb_gadget_ops -------------------------------------------------*/
2200 static int renesas_usb3_start(struct usb_gadget *gadget,
2201 struct usb_gadget_driver *driver)
2203 struct renesas_usb3 *usb3;
2205 if (!driver || driver->max_speed < USB_SPEED_FULL ||
2209 usb3 = gadget_to_renesas_usb3(gadget);
2211 /* hook up the driver */
2212 usb3->driver = driver;
2214 pm_runtime_enable(usb3_to_dev(usb3));
2215 pm_runtime_get_sync(usb3_to_dev(usb3));
2217 renesas_usb3_init_controller(usb3);
2222 static int renesas_usb3_stop(struct usb_gadget *gadget)
2224 struct renesas_usb3 *usb3 = gadget_to_renesas_usb3(gadget);
2226 usb3->softconnect = false;
2227 usb3->gadget.speed = USB_SPEED_UNKNOWN;
2228 usb3->driver = NULL;
2229 renesas_usb3_stop_controller(usb3);
2231 pm_runtime_put(usb3_to_dev(usb3));
2232 pm_runtime_disable(usb3_to_dev(usb3));
2237 static int renesas_usb3_get_frame(struct usb_gadget *_gadget)
2242 static int renesas_usb3_pullup(struct usb_gadget *gadget, int is_on)
2244 struct renesas_usb3 *usb3 = gadget_to_renesas_usb3(gadget);
2246 usb3->softconnect = !!is_on;
2251 static int renesas_usb3_set_selfpowered(struct usb_gadget *gadget, int is_self)
2253 gadget->is_selfpowered = !!is_self;
2258 static const struct usb_gadget_ops renesas_usb3_gadget_ops = {
2259 .get_frame = renesas_usb3_get_frame,
2260 .udc_start = renesas_usb3_start,
2261 .udc_stop = renesas_usb3_stop,
2262 .pullup = renesas_usb3_pullup,
2263 .set_selfpowered = renesas_usb3_set_selfpowered,
2266 static ssize_t role_store(struct device *dev, struct device_attribute *attr,
2267 const char *buf, size_t count)
2269 struct renesas_usb3 *usb3 = dev_get_drvdata(dev);
2270 bool new_mode_is_host;
2275 if (!strncmp(buf, "host", strlen("host")))
2276 new_mode_is_host = true;
2277 else if (!strncmp(buf, "peripheral", strlen("peripheral")))
2278 new_mode_is_host = false;
2282 if (new_mode_is_host == usb3_is_host(usb3))
2285 usb3_mode_config(usb3, new_mode_is_host, usb3_is_a_device(usb3));
2290 static ssize_t role_show(struct device *dev, struct device_attribute *attr,
2293 struct renesas_usb3 *usb3 = dev_get_drvdata(dev);
2298 return sprintf(buf, "%s\n", usb3_is_host(usb3) ? "host" : "peripheral");
2300 static DEVICE_ATTR_RW(role);
2302 /*------- platform_driver ------------------------------------------------*/
2303 static int renesas_usb3_remove(struct platform_device *pdev)
2305 struct renesas_usb3 *usb3 = platform_get_drvdata(pdev);
2307 device_remove_file(&pdev->dev, &dev_attr_role);
2309 usb_del_gadget_udc(&usb3->gadget);
2310 renesas_usb3_dma_free_prd(usb3, &pdev->dev);
2312 __renesas_usb3_ep_free_request(usb3->ep0_req);
2317 static int renesas_usb3_init_ep(struct renesas_usb3 *usb3, struct device *dev,
2318 const struct renesas_usb3_priv *priv)
2320 struct renesas_usb3_ep *usb3_ep;
2323 /* calculate num_usb3_eps from renesas_usb3_priv */
2324 usb3->num_usb3_eps = priv->ramsize_per_ramif * priv->num_ramif * 2 /
2325 priv->ramsize_per_pipe + 1;
2327 if (usb3->num_usb3_eps > USB3_MAX_NUM_PIPES)
2328 usb3->num_usb3_eps = USB3_MAX_NUM_PIPES;
2330 usb3->usb3_ep = devm_kzalloc(dev, sizeof(*usb3_ep) * usb3->num_usb3_eps,
2335 dev_dbg(dev, "%s: num_usb3_eps = %d\n", __func__, usb3->num_usb3_eps);
2337 * This driver prepares pipes as follows:
2338 * - odd pipes = IN pipe
2339 * - even pipes = OUT pipe (except pipe 0)
2341 usb3_for_each_ep(usb3_ep, usb3, i) {
2342 snprintf(usb3_ep->ep_name, sizeof(usb3_ep->ep_name), "ep%d", i);
2343 usb3_ep->usb3 = usb3;
2345 usb3_ep->ep.name = usb3_ep->ep_name;
2346 usb3_ep->ep.ops = &renesas_usb3_ep_ops;
2347 INIT_LIST_HEAD(&usb3_ep->queue);
2348 INIT_LIST_HEAD(&usb3_ep->ep.ep_list);
2350 /* for control pipe */
2351 usb3->gadget.ep0 = &usb3_ep->ep;
2352 usb_ep_set_maxpacket_limit(&usb3_ep->ep,
2353 USB3_EP0_HSFS_MAX_PACKET_SIZE);
2354 usb3_ep->ep.caps.type_control = true;
2355 usb3_ep->ep.caps.dir_in = true;
2356 usb3_ep->ep.caps.dir_out = true;
2360 /* for bulk or interrupt pipe */
2361 usb_ep_set_maxpacket_limit(&usb3_ep->ep, ~0);
2362 list_add_tail(&usb3_ep->ep.ep_list, &usb3->gadget.ep_list);
2363 usb3_ep->ep.caps.type_bulk = true;
2364 usb3_ep->ep.caps.type_int = true;
2366 usb3_ep->ep.caps.dir_in = true;
2368 usb3_ep->ep.caps.dir_out = true;
2374 static void renesas_usb3_init_ram(struct renesas_usb3 *usb3, struct device *dev,
2375 const struct renesas_usb3_priv *priv)
2377 struct renesas_usb3_ep *usb3_ep;
2379 u32 ramif[2], basead[2]; /* index 0 = for IN pipes */
2380 u32 *cur_ramif, *cur_basead;
2383 memset(ramif, 0, sizeof(ramif));
2384 memset(basead, 0, sizeof(basead));
2387 * This driver prepares pipes as follows:
2388 * - all pipes = the same size as "ramsize_per_pipe"
2389 * Please refer to the "Method of Specifying RAM Mapping"
2391 usb3_for_each_ep(usb3_ep, usb3, i) {
2393 continue; /* out of scope if ep num = 0 */
2394 if (usb3_ep->ep.caps.dir_in) {
2395 cur_ramif = &ramif[0];
2396 cur_basead = &basead[0];
2398 cur_ramif = &ramif[1];
2399 cur_basead = &basead[1];
2402 if (*cur_basead > priv->ramsize_per_ramif)
2403 continue; /* out of memory for IN or OUT pipe */
2405 /* calculate rammap_val */
2406 val = PN_RAMMAP_RAMIF(*cur_ramif);
2407 val |= usb3_calc_ramarea(priv->ramsize_per_pipe);
2408 val |= PN_RAMMAP_BASEAD(*cur_basead);
2409 usb3_ep->rammap_val = val;
2411 dev_dbg(dev, "ep%2d: val = %08x, ramif = %d, base = %x\n",
2412 i, val, *cur_ramif, *cur_basead);
2414 /* update current ramif */
2415 if (*cur_ramif + 1 == priv->num_ramif) {
2417 *cur_basead += priv->ramsize_per_pipe;
2424 static const struct renesas_usb3_priv renesas_usb3_priv_r8a7795 = {
2425 .ramsize_per_ramif = SZ_16K,
2427 .ramsize_per_pipe = SZ_4K,
2428 .workaround_for_vbus = true,
2431 static const struct of_device_id usb3_of_match[] = {
2433 .compatible = "renesas,r8a7795-usb3-peri",
2434 .data = &renesas_usb3_priv_r8a7795,
2438 MODULE_DEVICE_TABLE(of, usb3_of_match);
2440 static const unsigned int renesas_usb3_cable[] = {
2446 static int renesas_usb3_probe(struct platform_device *pdev)
2448 struct renesas_usb3 *usb3;
2449 struct resource *res;
2450 const struct of_device_id *match;
2452 const struct renesas_usb3_priv *priv;
2454 match = of_match_node(usb3_of_match, pdev->dev.of_node);
2459 irq = platform_get_irq(pdev, 0);
2463 usb3 = devm_kzalloc(&pdev->dev, sizeof(*usb3), GFP_KERNEL);
2467 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2468 usb3->reg = devm_ioremap_resource(&pdev->dev, res);
2469 if (IS_ERR(usb3->reg))
2470 return PTR_ERR(usb3->reg);
2472 platform_set_drvdata(pdev, usb3);
2473 spin_lock_init(&usb3->lock);
2475 usb3->gadget.ops = &renesas_usb3_gadget_ops;
2476 usb3->gadget.name = udc_name;
2477 usb3->gadget.max_speed = USB_SPEED_SUPER;
2478 INIT_LIST_HEAD(&usb3->gadget.ep_list);
2479 ret = renesas_usb3_init_ep(usb3, &pdev->dev, priv);
2482 renesas_usb3_init_ram(usb3, &pdev->dev, priv);
2484 ret = devm_request_irq(&pdev->dev, irq, renesas_usb3_irq, 0,
2485 dev_name(&pdev->dev), usb3);
2489 INIT_WORK(&usb3->extcon_work, renesas_usb3_extcon_work);
2490 usb3->extcon = devm_extcon_dev_allocate(&pdev->dev, renesas_usb3_cable);
2491 if (IS_ERR(usb3->extcon))
2492 return PTR_ERR(usb3->extcon);
2494 ret = devm_extcon_dev_register(&pdev->dev, usb3->extcon);
2496 dev_err(&pdev->dev, "Failed to register extcon\n");
2500 /* for ep0 handling */
2501 usb3->ep0_req = __renesas_usb3_ep_alloc_request(GFP_KERNEL);
2505 ret = renesas_usb3_dma_alloc_prd(usb3, &pdev->dev);
2509 ret = usb_add_gadget_udc(&pdev->dev, &usb3->gadget);
2513 ret = device_create_file(&pdev->dev, &dev_attr_role);
2515 goto err_dev_create;
2517 usb3->workaround_for_vbus = priv->workaround_for_vbus;
2519 dev_info(&pdev->dev, "probed\n");
2524 usb_del_gadget_udc(&usb3->gadget);
2527 renesas_usb3_dma_free_prd(usb3, &pdev->dev);
2530 __renesas_usb3_ep_free_request(usb3->ep0_req);
2535 static struct platform_driver renesas_usb3_driver = {
2536 .probe = renesas_usb3_probe,
2537 .remove = renesas_usb3_remove,
2539 .name = (char *)udc_name,
2540 .of_match_table = of_match_ptr(usb3_of_match),
2543 module_platform_driver(renesas_usb3_driver);
2545 MODULE_DESCRIPTION("Renesas USB3.0 Peripheral driver");
2546 MODULE_LICENSE("GPL v2");
2547 MODULE_AUTHOR("Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>");
2548 MODULE_ALIAS("platform:renesas_usb3");