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5fd54ace | 1 | // SPDX-License-Identifier: GPL-2.0 |
746bfe63 YS |
2 | /* |
3 | * Renesas USB3.0 Peripheral driver (USB gadget) | |
4 | * | |
279d4bc6 | 5 | * Copyright (C) 2015-2017 Renesas Electronics Corporation |
746bfe63 YS |
6 | */ |
7 | ||
43ba968b | 8 | #include <linux/debugfs.h> |
746bfe63 | 9 | #include <linux/delay.h> |
2d4aa21a | 10 | #include <linux/dma-mapping.h> |
746bfe63 | 11 | #include <linux/err.h> |
176aa360 | 12 | #include <linux/extcon-provider.h> |
746bfe63 YS |
13 | #include <linux/interrupt.h> |
14 | #include <linux/io.h> | |
15 | #include <linux/module.h> | |
16 | #include <linux/of_device.h> | |
279d4bc6 | 17 | #include <linux/phy/phy.h> |
746bfe63 YS |
18 | #include <linux/platform_device.h> |
19 | #include <linux/pm_runtime.h> | |
20 | #include <linux/sizes.h> | |
21 | #include <linux/slab.h> | |
974203c0 | 22 | #include <linux/sys_soc.h> |
43ba968b | 23 | #include <linux/uaccess.h> |
746bfe63 YS |
24 | #include <linux/usb/ch9.h> |
25 | #include <linux/usb/gadget.h> | |
26 | ||
27 | /* register definitions */ | |
28 | #define USB3_AXI_INT_STA 0x008 | |
29 | #define USB3_AXI_INT_ENA 0x00c | |
30 | #define USB3_DMA_INT_STA 0x010 | |
31 | #define USB3_DMA_INT_ENA 0x014 | |
2d4aa21a YS |
32 | #define USB3_DMA_CH0_CON(n) (0x030 + ((n) - 1) * 0x10) /* n = 1 to 4 */ |
33 | #define USB3_DMA_CH0_PRD_ADR(n) (0x034 + ((n) - 1) * 0x10) /* n = 1 to 4 */ | |
746bfe63 YS |
34 | #define USB3_USB_COM_CON 0x200 |
35 | #define USB3_USB20_CON 0x204 | |
36 | #define USB3_USB30_CON 0x208 | |
37 | #define USB3_USB_STA 0x210 | |
38 | #define USB3_DRD_CON 0x218 | |
39 | #define USB3_USB_INT_STA_1 0x220 | |
40 | #define USB3_USB_INT_STA_2 0x224 | |
41 | #define USB3_USB_INT_ENA_1 0x228 | |
42 | #define USB3_USB_INT_ENA_2 0x22c | |
43 | #define USB3_STUP_DAT_0 0x230 | |
44 | #define USB3_STUP_DAT_1 0x234 | |
77172a1f YS |
45 | #define USB3_USB_OTG_STA 0x268 |
46 | #define USB3_USB_OTG_INT_STA 0x26c | |
47 | #define USB3_USB_OTG_INT_ENA 0x270 | |
746bfe63 YS |
48 | #define USB3_P0_MOD 0x280 |
49 | #define USB3_P0_CON 0x288 | |
50 | #define USB3_P0_STA 0x28c | |
51 | #define USB3_P0_INT_STA 0x290 | |
52 | #define USB3_P0_INT_ENA 0x294 | |
53 | #define USB3_P0_LNG 0x2a0 | |
54 | #define USB3_P0_READ 0x2a4 | |
55 | #define USB3_P0_WRITE 0x2a8 | |
56 | #define USB3_PIPE_COM 0x2b0 | |
57 | #define USB3_PN_MOD 0x2c0 | |
58 | #define USB3_PN_RAMMAP 0x2c4 | |
59 | #define USB3_PN_CON 0x2c8 | |
60 | #define USB3_PN_STA 0x2cc | |
61 | #define USB3_PN_INT_STA 0x2d0 | |
62 | #define USB3_PN_INT_ENA 0x2d4 | |
63 | #define USB3_PN_LNG 0x2e0 | |
64 | #define USB3_PN_READ 0x2e4 | |
65 | #define USB3_PN_WRITE 0x2e8 | |
66 | #define USB3_SSIFCMD 0x340 | |
67 | ||
68 | /* AXI_INT_ENA and AXI_INT_STA */ | |
69 | #define AXI_INT_DMAINT BIT(31) | |
70 | #define AXI_INT_EPCINT BIT(30) | |
2d4aa21a YS |
71 | /* PRD's n = from 1 to 4 */ |
72 | #define AXI_INT_PRDEN_CLR_STA_SHIFT(n) (16 + (n) - 1) | |
73 | #define AXI_INT_PRDERR_STA_SHIFT(n) (0 + (n) - 1) | |
74 | #define AXI_INT_PRDEN_CLR_STA(n) (1 << AXI_INT_PRDEN_CLR_STA_SHIFT(n)) | |
75 | #define AXI_INT_PRDERR_STA(n) (1 << AXI_INT_PRDERR_STA_SHIFT(n)) | |
76 | ||
77 | /* DMA_INT_ENA and DMA_INT_STA */ | |
78 | #define DMA_INT(n) BIT(n) | |
79 | ||
80 | /* DMA_CH0_CONn */ | |
81 | #define DMA_CON_PIPE_DIR BIT(15) /* 1: In Transfer */ | |
82 | #define DMA_CON_PIPE_NO_SHIFT 8 | |
83 | #define DMA_CON_PIPE_NO_MASK GENMASK(12, DMA_CON_PIPE_NO_SHIFT) | |
84 | #define DMA_COM_PIPE_NO(n) (((n) << DMA_CON_PIPE_NO_SHIFT) & \ | |
85 | DMA_CON_PIPE_NO_MASK) | |
86 | #define DMA_CON_PRD_EN BIT(0) | |
746bfe63 YS |
87 | |
88 | /* LCLKSEL */ | |
89 | #define LCLKSEL_LSEL BIT(18) | |
90 | ||
91 | /* USB_COM_CON */ | |
92 | #define USB_COM_CON_CONF BIT(24) | |
ebe6b2b8 YS |
93 | #define USB_COM_CON_PN_WDATAIF_NL BIT(23) |
94 | #define USB_COM_CON_PN_RDATAIF_NL BIT(22) | |
95 | #define USB_COM_CON_PN_LSTTR_PP BIT(21) | |
746bfe63 YS |
96 | #define USB_COM_CON_SPD_MODE BIT(17) |
97 | #define USB_COM_CON_EP0_EN BIT(16) | |
98 | #define USB_COM_CON_DEV_ADDR_SHIFT 8 | |
99 | #define USB_COM_CON_DEV_ADDR_MASK GENMASK(14, USB_COM_CON_DEV_ADDR_SHIFT) | |
100 | #define USB_COM_CON_DEV_ADDR(n) (((n) << USB_COM_CON_DEV_ADDR_SHIFT) & \ | |
101 | USB_COM_CON_DEV_ADDR_MASK) | |
102 | #define USB_COM_CON_RX_DETECTION BIT(1) | |
103 | #define USB_COM_CON_PIPE_CLR BIT(0) | |
104 | ||
105 | /* USB20_CON */ | |
106 | #define USB20_CON_B2_PUE BIT(31) | |
107 | #define USB20_CON_B2_SUSPEND BIT(24) | |
108 | #define USB20_CON_B2_CONNECT BIT(17) | |
109 | #define USB20_CON_B2_TSTMOD_SHIFT 8 | |
110 | #define USB20_CON_B2_TSTMOD_MASK GENMASK(10, USB20_CON_B2_TSTMOD_SHIFT) | |
111 | #define USB20_CON_B2_TSTMOD(n) (((n) << USB20_CON_B2_TSTMOD_SHIFT) & \ | |
112 | USB20_CON_B2_TSTMOD_MASK) | |
113 | #define USB20_CON_B2_TSTMOD_EN BIT(0) | |
114 | ||
115 | /* USB30_CON */ | |
116 | #define USB30_CON_POW_SEL_SHIFT 24 | |
117 | #define USB30_CON_POW_SEL_MASK GENMASK(26, USB30_CON_POW_SEL_SHIFT) | |
118 | #define USB30_CON_POW_SEL_IN_U3 BIT(26) | |
119 | #define USB30_CON_POW_SEL_IN_DISCON 0 | |
120 | #define USB30_CON_POW_SEL_P2_TO_P0 BIT(25) | |
121 | #define USB30_CON_POW_SEL_P0_TO_P3 BIT(24) | |
122 | #define USB30_CON_POW_SEL_P0_TO_P2 0 | |
123 | #define USB30_CON_B3_PLLWAKE BIT(23) | |
124 | #define USB30_CON_B3_CONNECT BIT(17) | |
125 | #define USB30_CON_B3_HOTRST_CMP BIT(1) | |
126 | ||
127 | /* USB_STA */ | |
128 | #define USB_STA_SPEED_MASK (BIT(2) | BIT(1)) | |
129 | #define USB_STA_SPEED_HS BIT(2) | |
130 | #define USB_STA_SPEED_FS BIT(1) | |
131 | #define USB_STA_SPEED_SS 0 | |
132 | #define USB_STA_VBUS_STA BIT(0) | |
133 | ||
134 | /* DRD_CON */ | |
135 | #define DRD_CON_PERI_CON BIT(24) | |
b2f1eaae | 136 | #define DRD_CON_VBOUT BIT(0) |
746bfe63 YS |
137 | |
138 | /* USB_INT_ENA_1 and USB_INT_STA_1 */ | |
139 | #define USB_INT_1_B3_PLLWKUP BIT(31) | |
140 | #define USB_INT_1_B3_LUPSUCS BIT(30) | |
141 | #define USB_INT_1_B3_DISABLE BIT(27) | |
142 | #define USB_INT_1_B3_WRMRST BIT(21) | |
143 | #define USB_INT_1_B3_HOTRST BIT(20) | |
144 | #define USB_INT_1_B2_USBRST BIT(12) | |
145 | #define USB_INT_1_B2_L1SPND BIT(11) | |
146 | #define USB_INT_1_B2_SPND BIT(9) | |
147 | #define USB_INT_1_B2_RSUM BIT(8) | |
148 | #define USB_INT_1_SPEED BIT(1) | |
149 | #define USB_INT_1_VBUS_CNG BIT(0) | |
150 | ||
151 | /* USB_INT_ENA_2 and USB_INT_STA_2 */ | |
152 | #define USB_INT_2_PIPE(n) BIT(n) | |
153 | ||
77172a1f YS |
154 | /* USB_OTG_STA, USB_OTG_INT_STA and USB_OTG_INT_ENA */ |
155 | #define USB_OTG_IDMON BIT(4) | |
156 | ||
746bfe63 YS |
157 | /* P0_MOD */ |
158 | #define P0_MOD_DIR BIT(6) | |
159 | ||
160 | /* P0_CON and PN_CON */ | |
161 | #define PX_CON_BYTE_EN_MASK (BIT(10) | BIT(9)) | |
162 | #define PX_CON_BYTE_EN_SHIFT 9 | |
163 | #define PX_CON_BYTE_EN_BYTES(n) (((n) << PX_CON_BYTE_EN_SHIFT) & \ | |
164 | PX_CON_BYTE_EN_MASK) | |
165 | #define PX_CON_SEND BIT(8) | |
166 | ||
167 | /* P0_CON */ | |
168 | #define P0_CON_ST_RES_MASK (BIT(27) | BIT(26)) | |
169 | #define P0_CON_ST_RES_FORCE_STALL BIT(27) | |
170 | #define P0_CON_ST_RES_NORMAL BIT(26) | |
171 | #define P0_CON_ST_RES_FORCE_NRDY 0 | |
172 | #define P0_CON_OT_RES_MASK (BIT(25) | BIT(24)) | |
173 | #define P0_CON_OT_RES_FORCE_STALL BIT(25) | |
174 | #define P0_CON_OT_RES_NORMAL BIT(24) | |
175 | #define P0_CON_OT_RES_FORCE_NRDY 0 | |
176 | #define P0_CON_IN_RES_MASK (BIT(17) | BIT(16)) | |
177 | #define P0_CON_IN_RES_FORCE_STALL BIT(17) | |
178 | #define P0_CON_IN_RES_NORMAL BIT(16) | |
179 | #define P0_CON_IN_RES_FORCE_NRDY 0 | |
180 | #define P0_CON_RES_WEN BIT(7) | |
181 | #define P0_CON_BCLR BIT(1) | |
182 | ||
183 | /* P0_STA and PN_STA */ | |
184 | #define PX_STA_BUFSTS BIT(0) | |
185 | ||
186 | /* P0_INT_ENA and P0_INT_STA */ | |
187 | #define P0_INT_STSED BIT(18) | |
188 | #define P0_INT_STSST BIT(17) | |
189 | #define P0_INT_SETUP BIT(16) | |
190 | #define P0_INT_RCVNL BIT(8) | |
191 | #define P0_INT_ERDY BIT(7) | |
192 | #define P0_INT_FLOW BIT(6) | |
193 | #define P0_INT_STALL BIT(2) | |
194 | #define P0_INT_NRDY BIT(1) | |
195 | #define P0_INT_BFRDY BIT(0) | |
196 | #define P0_INT_ALL_BITS (P0_INT_STSED | P0_INT_SETUP | P0_INT_BFRDY) | |
197 | ||
198 | /* PN_MOD */ | |
199 | #define PN_MOD_DIR BIT(6) | |
200 | #define PN_MOD_TYPE_SHIFT 4 | |
201 | #define PN_MOD_TYPE_MASK GENMASK(5, PN_MOD_TYPE_SHIFT) | |
202 | #define PN_MOD_TYPE(n) (((n) << PN_MOD_TYPE_SHIFT) & \ | |
203 | PN_MOD_TYPE_MASK) | |
204 | #define PN_MOD_EPNUM_MASK GENMASK(3, 0) | |
205 | #define PN_MOD_EPNUM(n) ((n) & PN_MOD_EPNUM_MASK) | |
206 | ||
207 | /* PN_RAMMAP */ | |
208 | #define PN_RAMMAP_RAMAREA_SHIFT 29 | |
209 | #define PN_RAMMAP_RAMAREA_MASK GENMASK(31, PN_RAMMAP_RAMAREA_SHIFT) | |
210 | #define PN_RAMMAP_RAMAREA_16KB BIT(31) | |
211 | #define PN_RAMMAP_RAMAREA_8KB (BIT(30) | BIT(29)) | |
212 | #define PN_RAMMAP_RAMAREA_4KB BIT(30) | |
213 | #define PN_RAMMAP_RAMAREA_2KB BIT(29) | |
214 | #define PN_RAMMAP_RAMAREA_1KB 0 | |
215 | #define PN_RAMMAP_MPKT_SHIFT 16 | |
216 | #define PN_RAMMAP_MPKT_MASK GENMASK(26, PN_RAMMAP_MPKT_SHIFT) | |
217 | #define PN_RAMMAP_MPKT(n) (((n) << PN_RAMMAP_MPKT_SHIFT) & \ | |
218 | PN_RAMMAP_MPKT_MASK) | |
219 | #define PN_RAMMAP_RAMIF_SHIFT 14 | |
220 | #define PN_RAMMAP_RAMIF_MASK GENMASK(15, PN_RAMMAP_RAMIF_SHIFT) | |
221 | #define PN_RAMMAP_RAMIF(n) (((n) << PN_RAMMAP_RAMIF_SHIFT) & \ | |
222 | PN_RAMMAP_RAMIF_MASK) | |
223 | #define PN_RAMMAP_BASEAD_MASK GENMASK(13, 0) | |
224 | #define PN_RAMMAP_BASEAD(offs) (((offs) >> 3) & PN_RAMMAP_BASEAD_MASK) | |
225 | #define PN_RAMMAP_DATA(area, ramif, basead) ((PN_RAMMAP_##area) | \ | |
226 | (PN_RAMMAP_RAMIF(ramif)) | \ | |
227 | (PN_RAMMAP_BASEAD(basead))) | |
228 | ||
229 | /* PN_CON */ | |
230 | #define PN_CON_EN BIT(31) | |
231 | #define PN_CON_DATAIF_EN BIT(30) | |
232 | #define PN_CON_RES_MASK (BIT(17) | BIT(16)) | |
233 | #define PN_CON_RES_FORCE_STALL BIT(17) | |
234 | #define PN_CON_RES_NORMAL BIT(16) | |
235 | #define PN_CON_RES_FORCE_NRDY 0 | |
236 | #define PN_CON_LAST BIT(11) | |
237 | #define PN_CON_RES_WEN BIT(7) | |
238 | #define PN_CON_CLR BIT(0) | |
239 | ||
240 | /* PN_INT_STA and PN_INT_ENA */ | |
241 | #define PN_INT_LSTTR BIT(4) | |
242 | #define PN_INT_BFRDY BIT(0) | |
243 | ||
244 | /* USB3_SSIFCMD */ | |
245 | #define SSIFCMD_URES_U2 BIT(9) | |
246 | #define SSIFCMD_URES_U1 BIT(8) | |
247 | #define SSIFCMD_UDIR_U2 BIT(7) | |
248 | #define SSIFCMD_UDIR_U1 BIT(6) | |
249 | #define SSIFCMD_UREQ_U2 BIT(5) | |
250 | #define SSIFCMD_UREQ_U1 BIT(4) | |
251 | ||
252 | #define USB3_EP0_SS_MAX_PACKET_SIZE 512 | |
253 | #define USB3_EP0_HSFS_MAX_PACKET_SIZE 64 | |
254 | #define USB3_EP0_BUF_SIZE 8 | |
a58204ab | 255 | #define USB3_MAX_NUM_PIPES 6 /* This includes PIPE 0 */ |
746bfe63 | 256 | #define USB3_WAIT_US 3 |
2d4aa21a YS |
257 | #define USB3_DMA_NUM_SETTING_AREA 4 |
258 | /* | |
259 | * To avoid double-meaning of "0" (xferred 65536 bytes or received zlp if | |
260 | * buffer size is 65536), this driver uses the maximum size per a entry is | |
261 | * 32768 bytes. | |
262 | */ | |
263 | #define USB3_DMA_MAX_XFER_SIZE 32768 | |
264 | #define USB3_DMA_PRD_SIZE 4096 | |
746bfe63 YS |
265 | |
266 | struct renesas_usb3; | |
2d4aa21a YS |
267 | |
268 | /* Physical Region Descriptor Table */ | |
269 | struct renesas_usb3_prd { | |
270 | u32 word1; | |
271 | #define USB3_PRD1_E BIT(30) /* the end of chain */ | |
272 | #define USB3_PRD1_U BIT(29) /* completion of transfer */ | |
273 | #define USB3_PRD1_D BIT(28) /* Error occurred */ | |
274 | #define USB3_PRD1_INT BIT(27) /* Interrupt occurred */ | |
275 | #define USB3_PRD1_LST BIT(26) /* Last Packet */ | |
276 | #define USB3_PRD1_B_INC BIT(24) | |
277 | #define USB3_PRD1_MPS_8 0 | |
278 | #define USB3_PRD1_MPS_16 BIT(21) | |
279 | #define USB3_PRD1_MPS_32 BIT(22) | |
280 | #define USB3_PRD1_MPS_64 (BIT(22) | BIT(21)) | |
281 | #define USB3_PRD1_MPS_512 BIT(23) | |
282 | #define USB3_PRD1_MPS_1024 (BIT(23) | BIT(21)) | |
283 | #define USB3_PRD1_MPS_RESERVED (BIT(23) | BIT(22) | BIT(21)) | |
284 | #define USB3_PRD1_SIZE_MASK GENMASK(15, 0) | |
285 | ||
286 | u32 bap; | |
287 | }; | |
288 | #define USB3_DMA_NUM_PRD_ENTRIES (USB3_DMA_PRD_SIZE / \ | |
289 | sizeof(struct renesas_usb3_prd)) | |
290 | #define USB3_DMA_MAX_XFER_SIZE_ALL_PRDS (USB3_DMA_PRD_SIZE / \ | |
291 | sizeof(struct renesas_usb3_prd) * \ | |
292 | USB3_DMA_MAX_XFER_SIZE) | |
293 | ||
294 | struct renesas_usb3_dma { | |
295 | struct renesas_usb3_prd *prd; | |
296 | dma_addr_t prd_dma; | |
297 | int num; /* Setting area number (from 1 to 4) */ | |
298 | bool used; | |
299 | }; | |
300 | ||
746bfe63 YS |
301 | struct renesas_usb3_request { |
302 | struct usb_request req; | |
303 | struct list_head queue; | |
304 | }; | |
305 | ||
306 | #define USB3_EP_NAME_SIZE 8 | |
307 | struct renesas_usb3_ep { | |
308 | struct usb_ep ep; | |
309 | struct renesas_usb3 *usb3; | |
2d4aa21a | 310 | struct renesas_usb3_dma *dma; |
746bfe63 YS |
311 | int num; |
312 | char ep_name[USB3_EP_NAME_SIZE]; | |
313 | struct list_head queue; | |
314 | u32 rammap_val; | |
315 | bool dir_in; | |
316 | bool halt; | |
317 | bool wedge; | |
318 | bool started; | |
319 | }; | |
320 | ||
321 | struct renesas_usb3_priv { | |
322 | int ramsize_per_ramif; /* unit = bytes */ | |
323 | int num_ramif; | |
324 | int ramsize_per_pipe; /* unit = bytes */ | |
325 | bool workaround_for_vbus; /* if true, don't check vbus signal */ | |
326 | }; | |
327 | ||
328 | struct renesas_usb3 { | |
329 | void __iomem *reg; | |
330 | ||
331 | struct usb_gadget gadget; | |
332 | struct usb_gadget_driver *driver; | |
3b68e7ca YS |
333 | struct extcon_dev *extcon; |
334 | struct work_struct extcon_work; | |
279d4bc6 | 335 | struct phy *phy; |
746bfe63 YS |
336 | |
337 | struct renesas_usb3_ep *usb3_ep; | |
338 | int num_usb3_eps; | |
339 | ||
2d4aa21a YS |
340 | struct renesas_usb3_dma dma[USB3_DMA_NUM_SETTING_AREA]; |
341 | ||
746bfe63 YS |
342 | spinlock_t lock; |
343 | int disabled_count; | |
344 | ||
345 | struct usb_request *ep0_req; | |
346 | u16 test_mode; | |
347 | u8 ep0_buf[USB3_EP0_BUF_SIZE]; | |
348 | bool softconnect; | |
349 | bool workaround_for_vbus; | |
3b68e7ca YS |
350 | bool extcon_host; /* check id and set EXTCON_USB_HOST */ |
351 | bool extcon_usb; /* check vbus and set EXTCON_USB */ | |
43ba968b | 352 | bool forced_b_device; |
746bfe63 YS |
353 | }; |
354 | ||
355 | #define gadget_to_renesas_usb3(_gadget) \ | |
356 | container_of(_gadget, struct renesas_usb3, gadget) | |
357 | #define renesas_usb3_to_gadget(renesas_usb3) (&renesas_usb3->gadget) | |
358 | #define usb3_to_dev(_usb3) (_usb3->gadget.dev.parent) | |
359 | ||
360 | #define usb_ep_to_usb3_ep(_ep) container_of(_ep, struct renesas_usb3_ep, ep) | |
361 | #define usb3_ep_to_usb3(_usb3_ep) (_usb3_ep->usb3) | |
362 | #define usb_req_to_usb3_req(_req) container_of(_req, \ | |
363 | struct renesas_usb3_request, req) | |
364 | ||
365 | #define usb3_get_ep(usb3, n) ((usb3)->usb3_ep + (n)) | |
366 | #define usb3_for_each_ep(usb3_ep, usb3, i) \ | |
367 | for ((i) = 0, usb3_ep = usb3_get_ep(usb3, (i)); \ | |
368 | (i) < (usb3)->num_usb3_eps; \ | |
369 | (i)++, usb3_ep = usb3_get_ep(usb3, (i))) | |
370 | ||
2d4aa21a YS |
371 | #define usb3_get_dma(usb3, i) (&(usb3)->dma[i]) |
372 | #define usb3_for_each_dma(usb3, dma, i) \ | |
373 | for ((i) = 0, dma = usb3_get_dma((usb3), (i)); \ | |
374 | (i) < USB3_DMA_NUM_SETTING_AREA; \ | |
375 | (i)++, dma = usb3_get_dma((usb3), (i))) | |
376 | ||
746bfe63 YS |
377 | static const char udc_name[] = "renesas_usb3"; |
378 | ||
2d4aa21a YS |
379 | static bool use_dma = 1; |
380 | module_param(use_dma, bool, 0644); | |
381 | MODULE_PARM_DESC(use_dma, "use dedicated DMAC"); | |
382 | ||
746bfe63 YS |
383 | static void usb3_write(struct renesas_usb3 *usb3, u32 data, u32 offs) |
384 | { | |
385 | iowrite32(data, usb3->reg + offs); | |
386 | } | |
387 | ||
388 | static u32 usb3_read(struct renesas_usb3 *usb3, u32 offs) | |
389 | { | |
390 | return ioread32(usb3->reg + offs); | |
391 | } | |
392 | ||
393 | static void usb3_set_bit(struct renesas_usb3 *usb3, u32 bits, u32 offs) | |
394 | { | |
395 | u32 val = usb3_read(usb3, offs); | |
396 | ||
397 | val |= bits; | |
398 | usb3_write(usb3, val, offs); | |
399 | } | |
400 | ||
401 | static void usb3_clear_bit(struct renesas_usb3 *usb3, u32 bits, u32 offs) | |
402 | { | |
403 | u32 val = usb3_read(usb3, offs); | |
404 | ||
405 | val &= ~bits; | |
406 | usb3_write(usb3, val, offs); | |
407 | } | |
408 | ||
409 | static int usb3_wait(struct renesas_usb3 *usb3, u32 reg, u32 mask, | |
410 | u32 expected) | |
411 | { | |
412 | int i; | |
413 | ||
414 | for (i = 0; i < USB3_WAIT_US; i++) { | |
415 | if ((usb3_read(usb3, reg) & mask) == expected) | |
416 | return 0; | |
417 | udelay(1); | |
418 | } | |
419 | ||
420 | dev_dbg(usb3_to_dev(usb3), "%s: timed out (%8x, %08x, %08x)\n", | |
421 | __func__, reg, mask, expected); | |
422 | ||
423 | return -EBUSY; | |
424 | } | |
425 | ||
3b68e7ca YS |
426 | static void renesas_usb3_extcon_work(struct work_struct *work) |
427 | { | |
428 | struct renesas_usb3 *usb3 = container_of(work, struct renesas_usb3, | |
429 | extcon_work); | |
430 | ||
431 | extcon_set_state_sync(usb3->extcon, EXTCON_USB_HOST, usb3->extcon_host); | |
432 | extcon_set_state_sync(usb3->extcon, EXTCON_USB, usb3->extcon_usb); | |
433 | } | |
434 | ||
746bfe63 YS |
435 | static void usb3_enable_irq_1(struct renesas_usb3 *usb3, u32 bits) |
436 | { | |
437 | usb3_set_bit(usb3, bits, USB3_USB_INT_ENA_1); | |
438 | } | |
439 | ||
440 | static void usb3_disable_irq_1(struct renesas_usb3 *usb3, u32 bits) | |
441 | { | |
442 | usb3_clear_bit(usb3, bits, USB3_USB_INT_ENA_1); | |
443 | } | |
444 | ||
445 | static void usb3_enable_pipe_irq(struct renesas_usb3 *usb3, int num) | |
446 | { | |
447 | usb3_set_bit(usb3, USB_INT_2_PIPE(num), USB3_USB_INT_ENA_2); | |
448 | } | |
449 | ||
450 | static void usb3_disable_pipe_irq(struct renesas_usb3 *usb3, int num) | |
451 | { | |
452 | usb3_clear_bit(usb3, USB_INT_2_PIPE(num), USB3_USB_INT_ENA_2); | |
453 | } | |
454 | ||
cc995c9e YS |
455 | static bool usb3_is_host(struct renesas_usb3 *usb3) |
456 | { | |
457 | return !(usb3_read(usb3, USB3_DRD_CON) & DRD_CON_PERI_CON); | |
458 | } | |
459 | ||
746bfe63 YS |
460 | static void usb3_init_axi_bridge(struct renesas_usb3 *usb3) |
461 | { | |
462 | /* Set AXI_INT */ | |
463 | usb3_write(usb3, ~0, USB3_DMA_INT_STA); | |
464 | usb3_write(usb3, 0, USB3_DMA_INT_ENA); | |
465 | usb3_set_bit(usb3, AXI_INT_DMAINT | AXI_INT_EPCINT, USB3_AXI_INT_ENA); | |
466 | } | |
467 | ||
468 | static void usb3_init_epc_registers(struct renesas_usb3 *usb3) | |
469 | { | |
746bfe63 YS |
470 | usb3_write(usb3, ~0, USB3_USB_INT_STA_1); |
471 | usb3_enable_irq_1(usb3, USB_INT_1_VBUS_CNG); | |
472 | } | |
473 | ||
474 | static bool usb3_wakeup_usb2_phy(struct renesas_usb3 *usb3) | |
475 | { | |
476 | if (!(usb3_read(usb3, USB3_USB20_CON) & USB20_CON_B2_SUSPEND)) | |
477 | return true; /* already waked it up */ | |
478 | ||
479 | usb3_clear_bit(usb3, USB20_CON_B2_SUSPEND, USB3_USB20_CON); | |
480 | usb3_enable_irq_1(usb3, USB_INT_1_B2_RSUM); | |
481 | ||
482 | return false; | |
483 | } | |
484 | ||
485 | static void usb3_usb2_pullup(struct renesas_usb3 *usb3, int pullup) | |
486 | { | |
487 | u32 bits = USB20_CON_B2_PUE | USB20_CON_B2_CONNECT; | |
488 | ||
489 | if (usb3->softconnect && pullup) | |
490 | usb3_set_bit(usb3, bits, USB3_USB20_CON); | |
491 | else | |
492 | usb3_clear_bit(usb3, bits, USB3_USB20_CON); | |
493 | } | |
494 | ||
495 | static void usb3_set_test_mode(struct renesas_usb3 *usb3) | |
496 | { | |
497 | u32 val = usb3_read(usb3, USB3_USB20_CON); | |
498 | ||
499 | val &= ~USB20_CON_B2_TSTMOD_MASK; | |
500 | val |= USB20_CON_B2_TSTMOD(usb3->test_mode); | |
501 | usb3_write(usb3, val | USB20_CON_B2_TSTMOD_EN, USB3_USB20_CON); | |
502 | if (!usb3->test_mode) | |
503 | usb3_clear_bit(usb3, USB20_CON_B2_TSTMOD_EN, USB3_USB20_CON); | |
504 | } | |
505 | ||
506 | static void usb3_start_usb2_connection(struct renesas_usb3 *usb3) | |
507 | { | |
508 | usb3->disabled_count++; | |
509 | usb3_set_bit(usb3, USB_COM_CON_EP0_EN, USB3_USB_COM_CON); | |
510 | usb3_set_bit(usb3, USB_COM_CON_SPD_MODE, USB3_USB_COM_CON); | |
511 | usb3_usb2_pullup(usb3, 1); | |
512 | } | |
513 | ||
514 | static int usb3_is_usb3_phy_in_u3(struct renesas_usb3 *usb3) | |
515 | { | |
516 | return usb3_read(usb3, USB3_USB30_CON) & USB30_CON_POW_SEL_IN_U3; | |
517 | } | |
518 | ||
519 | static bool usb3_wakeup_usb3_phy(struct renesas_usb3 *usb3) | |
520 | { | |
521 | if (!usb3_is_usb3_phy_in_u3(usb3)) | |
522 | return true; /* already waked it up */ | |
523 | ||
524 | usb3_set_bit(usb3, USB30_CON_B3_PLLWAKE, USB3_USB30_CON); | |
525 | usb3_enable_irq_1(usb3, USB_INT_1_B3_PLLWKUP); | |
526 | ||
527 | return false; | |
528 | } | |
529 | ||
530 | static u16 usb3_feature_get_un_enabled(struct renesas_usb3 *usb3) | |
531 | { | |
532 | u32 mask_u2 = SSIFCMD_UDIR_U2 | SSIFCMD_UREQ_U2; | |
533 | u32 mask_u1 = SSIFCMD_UDIR_U1 | SSIFCMD_UREQ_U1; | |
534 | u32 val = usb3_read(usb3, USB3_SSIFCMD); | |
535 | u16 ret = 0; | |
536 | ||
537 | /* Enables {U2,U1} if the bits of UDIR and UREQ are set to 0 */ | |
538 | if (!(val & mask_u2)) | |
539 | ret |= 1 << USB_DEV_STAT_U2_ENABLED; | |
540 | if (!(val & mask_u1)) | |
541 | ret |= 1 << USB_DEV_STAT_U1_ENABLED; | |
542 | ||
543 | return ret; | |
544 | } | |
545 | ||
546 | static void usb3_feature_u2_enable(struct renesas_usb3 *usb3, bool enable) | |
547 | { | |
548 | u32 bits = SSIFCMD_UDIR_U2 | SSIFCMD_UREQ_U2; | |
549 | ||
550 | /* Enables U2 if the bits of UDIR and UREQ are set to 0 */ | |
551 | if (enable) | |
552 | usb3_clear_bit(usb3, bits, USB3_SSIFCMD); | |
553 | else | |
554 | usb3_set_bit(usb3, bits, USB3_SSIFCMD); | |
555 | } | |
556 | ||
557 | static void usb3_feature_u1_enable(struct renesas_usb3 *usb3, bool enable) | |
558 | { | |
559 | u32 bits = SSIFCMD_UDIR_U1 | SSIFCMD_UREQ_U1; | |
560 | ||
561 | /* Enables U1 if the bits of UDIR and UREQ are set to 0 */ | |
562 | if (enable) | |
563 | usb3_clear_bit(usb3, bits, USB3_SSIFCMD); | |
564 | else | |
565 | usb3_set_bit(usb3, bits, USB3_SSIFCMD); | |
566 | } | |
567 | ||
568 | static void usb3_start_operation_for_usb3(struct renesas_usb3 *usb3) | |
569 | { | |
570 | usb3_set_bit(usb3, USB_COM_CON_EP0_EN, USB3_USB_COM_CON); | |
571 | usb3_clear_bit(usb3, USB_COM_CON_SPD_MODE, USB3_USB_COM_CON); | |
572 | usb3_set_bit(usb3, USB30_CON_B3_CONNECT, USB3_USB30_CON); | |
573 | } | |
574 | ||
575 | static void usb3_start_usb3_connection(struct renesas_usb3 *usb3) | |
576 | { | |
577 | usb3_start_operation_for_usb3(usb3); | |
578 | usb3_set_bit(usb3, USB_COM_CON_RX_DETECTION, USB3_USB_COM_CON); | |
579 | ||
580 | usb3_enable_irq_1(usb3, USB_INT_1_B3_LUPSUCS | USB_INT_1_B3_DISABLE | | |
581 | USB_INT_1_SPEED); | |
582 | } | |
583 | ||
584 | static void usb3_stop_usb3_connection(struct renesas_usb3 *usb3) | |
585 | { | |
586 | usb3_clear_bit(usb3, USB30_CON_B3_CONNECT, USB3_USB30_CON); | |
587 | } | |
588 | ||
589 | static void usb3_transition_to_default_state(struct renesas_usb3 *usb3, | |
590 | bool is_usb3) | |
591 | { | |
592 | usb3_set_bit(usb3, USB_INT_2_PIPE(0), USB3_USB_INT_ENA_2); | |
593 | usb3_write(usb3, P0_INT_ALL_BITS, USB3_P0_INT_STA); | |
594 | usb3_set_bit(usb3, P0_INT_ALL_BITS, USB3_P0_INT_ENA); | |
595 | ||
596 | if (is_usb3) | |
597 | usb3_enable_irq_1(usb3, USB_INT_1_B3_WRMRST | | |
598 | USB_INT_1_B3_HOTRST); | |
599 | else | |
600 | usb3_enable_irq_1(usb3, USB_INT_1_B2_SPND | | |
601 | USB_INT_1_B2_L1SPND | USB_INT_1_B2_USBRST); | |
602 | } | |
603 | ||
604 | static void usb3_connect(struct renesas_usb3 *usb3) | |
605 | { | |
606 | if (usb3_wakeup_usb3_phy(usb3)) | |
607 | usb3_start_usb3_connection(usb3); | |
608 | } | |
609 | ||
610 | static void usb3_reset_epc(struct renesas_usb3 *usb3) | |
611 | { | |
612 | usb3_clear_bit(usb3, USB_COM_CON_CONF, USB3_USB_COM_CON); | |
613 | usb3_clear_bit(usb3, USB_COM_CON_EP0_EN, USB3_USB_COM_CON); | |
614 | usb3_set_bit(usb3, USB_COM_CON_PIPE_CLR, USB3_USB_COM_CON); | |
615 | usb3->test_mode = 0; | |
616 | usb3_set_test_mode(usb3); | |
617 | } | |
618 | ||
619 | static void usb3_disconnect(struct renesas_usb3 *usb3) | |
620 | { | |
621 | usb3->disabled_count = 0; | |
622 | usb3_usb2_pullup(usb3, 0); | |
623 | usb3_clear_bit(usb3, USB30_CON_B3_CONNECT, USB3_USB30_CON); | |
624 | usb3_reset_epc(usb3); | |
625 | ||
626 | if (usb3->driver) | |
627 | usb3->driver->disconnect(&usb3->gadget); | |
628 | } | |
629 | ||
630 | static void usb3_check_vbus(struct renesas_usb3 *usb3) | |
631 | { | |
632 | if (usb3->workaround_for_vbus) { | |
633 | usb3_connect(usb3); | |
634 | } else { | |
3b68e7ca YS |
635 | usb3->extcon_usb = !!(usb3_read(usb3, USB3_USB_STA) & |
636 | USB_STA_VBUS_STA); | |
637 | if (usb3->extcon_usb) | |
746bfe63 YS |
638 | usb3_connect(usb3); |
639 | else | |
640 | usb3_disconnect(usb3); | |
3b68e7ca YS |
641 | |
642 | schedule_work(&usb3->extcon_work); | |
746bfe63 YS |
643 | } |
644 | } | |
645 | ||
77172a1f YS |
646 | static void usb3_set_mode(struct renesas_usb3 *usb3, bool host) |
647 | { | |
648 | if (host) | |
649 | usb3_clear_bit(usb3, DRD_CON_PERI_CON, USB3_DRD_CON); | |
650 | else | |
651 | usb3_set_bit(usb3, DRD_CON_PERI_CON, USB3_DRD_CON); | |
652 | } | |
653 | ||
654 | static void usb3_vbus_out(struct renesas_usb3 *usb3, bool enable) | |
655 | { | |
656 | if (enable) | |
657 | usb3_set_bit(usb3, DRD_CON_VBOUT, USB3_DRD_CON); | |
658 | else | |
659 | usb3_clear_bit(usb3, DRD_CON_VBOUT, USB3_DRD_CON); | |
660 | } | |
661 | ||
662 | static void usb3_mode_config(struct renesas_usb3 *usb3, bool host, bool a_dev) | |
663 | { | |
cc995c9e YS |
664 | unsigned long flags; |
665 | ||
666 | spin_lock_irqsave(&usb3->lock, flags); | |
77172a1f YS |
667 | usb3_set_mode(usb3, host); |
668 | usb3_vbus_out(usb3, a_dev); | |
43ba968b YS |
669 | /* for A-Peripheral or forced B-device mode */ |
670 | if ((!host && a_dev) || | |
671 | (usb3->workaround_for_vbus && usb3->forced_b_device)) | |
cc995c9e YS |
672 | usb3_connect(usb3); |
673 | spin_unlock_irqrestore(&usb3->lock, flags); | |
77172a1f YS |
674 | } |
675 | ||
676 | static bool usb3_is_a_device(struct renesas_usb3 *usb3) | |
677 | { | |
678 | return !(usb3_read(usb3, USB3_USB_OTG_STA) & USB_OTG_IDMON); | |
679 | } | |
680 | ||
681 | static void usb3_check_id(struct renesas_usb3 *usb3) | |
682 | { | |
3b68e7ca YS |
683 | usb3->extcon_host = usb3_is_a_device(usb3); |
684 | ||
43ba968b | 685 | if (usb3->extcon_host && !usb3->forced_b_device) |
77172a1f YS |
686 | usb3_mode_config(usb3, true, true); |
687 | else | |
688 | usb3_mode_config(usb3, false, false); | |
3b68e7ca YS |
689 | |
690 | schedule_work(&usb3->extcon_work); | |
77172a1f YS |
691 | } |
692 | ||
746bfe63 YS |
693 | static void renesas_usb3_init_controller(struct renesas_usb3 *usb3) |
694 | { | |
695 | usb3_init_axi_bridge(usb3); | |
696 | usb3_init_epc_registers(usb3); | |
ebe6b2b8 YS |
697 | usb3_set_bit(usb3, USB_COM_CON_PN_WDATAIF_NL | |
698 | USB_COM_CON_PN_RDATAIF_NL | USB_COM_CON_PN_LSTTR_PP, | |
699 | USB3_USB_COM_CON); | |
77172a1f YS |
700 | usb3_write(usb3, USB_OTG_IDMON, USB3_USB_OTG_INT_STA); |
701 | usb3_write(usb3, USB_OTG_IDMON, USB3_USB_OTG_INT_ENA); | |
746bfe63 | 702 | |
77172a1f | 703 | usb3_check_id(usb3); |
746bfe63 YS |
704 | usb3_check_vbus(usb3); |
705 | } | |
706 | ||
707 | static void renesas_usb3_stop_controller(struct renesas_usb3 *usb3) | |
708 | { | |
709 | usb3_disconnect(usb3); | |
710 | usb3_write(usb3, 0, USB3_P0_INT_ENA); | |
77172a1f | 711 | usb3_write(usb3, 0, USB3_USB_OTG_INT_ENA); |
746bfe63 YS |
712 | usb3_write(usb3, 0, USB3_USB_INT_ENA_1); |
713 | usb3_write(usb3, 0, USB3_USB_INT_ENA_2); | |
714 | usb3_write(usb3, 0, USB3_AXI_INT_ENA); | |
715 | } | |
716 | ||
717 | static void usb3_irq_epc_int_1_pll_wakeup(struct renesas_usb3 *usb3) | |
718 | { | |
719 | usb3_disable_irq_1(usb3, USB_INT_1_B3_PLLWKUP); | |
720 | usb3_clear_bit(usb3, USB30_CON_B3_PLLWAKE, USB3_USB30_CON); | |
721 | usb3_start_usb3_connection(usb3); | |
722 | } | |
723 | ||
724 | static void usb3_irq_epc_int_1_linkup_success(struct renesas_usb3 *usb3) | |
725 | { | |
726 | usb3_transition_to_default_state(usb3, true); | |
727 | } | |
728 | ||
729 | static void usb3_irq_epc_int_1_resume(struct renesas_usb3 *usb3) | |
730 | { | |
731 | usb3_disable_irq_1(usb3, USB_INT_1_B2_RSUM); | |
732 | usb3_start_usb2_connection(usb3); | |
733 | usb3_transition_to_default_state(usb3, false); | |
734 | } | |
735 | ||
736 | static void usb3_irq_epc_int_1_disable(struct renesas_usb3 *usb3) | |
737 | { | |
738 | usb3_stop_usb3_connection(usb3); | |
739 | if (usb3_wakeup_usb2_phy(usb3)) | |
740 | usb3_irq_epc_int_1_resume(usb3); | |
741 | } | |
742 | ||
743 | static void usb3_irq_epc_int_1_bus_reset(struct renesas_usb3 *usb3) | |
744 | { | |
745 | usb3_reset_epc(usb3); | |
746 | if (usb3->disabled_count < 3) | |
747 | usb3_start_usb3_connection(usb3); | |
748 | else | |
749 | usb3_start_usb2_connection(usb3); | |
750 | } | |
751 | ||
752 | static void usb3_irq_epc_int_1_vbus_change(struct renesas_usb3 *usb3) | |
753 | { | |
754 | usb3_check_vbus(usb3); | |
755 | } | |
756 | ||
757 | static void usb3_irq_epc_int_1_hot_reset(struct renesas_usb3 *usb3) | |
758 | { | |
759 | usb3_reset_epc(usb3); | |
760 | usb3_set_bit(usb3, USB_COM_CON_EP0_EN, USB3_USB_COM_CON); | |
761 | ||
762 | /* This bit shall be set within 12ms from the start of HotReset */ | |
763 | usb3_set_bit(usb3, USB30_CON_B3_HOTRST_CMP, USB3_USB30_CON); | |
764 | } | |
765 | ||
766 | static void usb3_irq_epc_int_1_warm_reset(struct renesas_usb3 *usb3) | |
767 | { | |
768 | usb3_reset_epc(usb3); | |
769 | usb3_set_bit(usb3, USB_COM_CON_EP0_EN, USB3_USB_COM_CON); | |
770 | ||
771 | usb3_start_operation_for_usb3(usb3); | |
772 | usb3_enable_irq_1(usb3, USB_INT_1_SPEED); | |
773 | } | |
774 | ||
775 | static void usb3_irq_epc_int_1_speed(struct renesas_usb3 *usb3) | |
776 | { | |
777 | u32 speed = usb3_read(usb3, USB3_USB_STA) & USB_STA_SPEED_MASK; | |
778 | ||
779 | switch (speed) { | |
780 | case USB_STA_SPEED_SS: | |
781 | usb3->gadget.speed = USB_SPEED_SUPER; | |
782 | break; | |
783 | case USB_STA_SPEED_HS: | |
784 | usb3->gadget.speed = USB_SPEED_HIGH; | |
785 | break; | |
786 | case USB_STA_SPEED_FS: | |
787 | usb3->gadget.speed = USB_SPEED_FULL; | |
788 | break; | |
789 | default: | |
790 | usb3->gadget.speed = USB_SPEED_UNKNOWN; | |
791 | break; | |
792 | } | |
793 | } | |
794 | ||
795 | static void usb3_irq_epc_int_1(struct renesas_usb3 *usb3, u32 int_sta_1) | |
796 | { | |
797 | if (int_sta_1 & USB_INT_1_B3_PLLWKUP) | |
798 | usb3_irq_epc_int_1_pll_wakeup(usb3); | |
799 | ||
800 | if (int_sta_1 & USB_INT_1_B3_LUPSUCS) | |
801 | usb3_irq_epc_int_1_linkup_success(usb3); | |
802 | ||
803 | if (int_sta_1 & USB_INT_1_B3_HOTRST) | |
804 | usb3_irq_epc_int_1_hot_reset(usb3); | |
805 | ||
806 | if (int_sta_1 & USB_INT_1_B3_WRMRST) | |
807 | usb3_irq_epc_int_1_warm_reset(usb3); | |
808 | ||
809 | if (int_sta_1 & USB_INT_1_B3_DISABLE) | |
810 | usb3_irq_epc_int_1_disable(usb3); | |
811 | ||
812 | if (int_sta_1 & USB_INT_1_B2_USBRST) | |
813 | usb3_irq_epc_int_1_bus_reset(usb3); | |
814 | ||
815 | if (int_sta_1 & USB_INT_1_B2_RSUM) | |
816 | usb3_irq_epc_int_1_resume(usb3); | |
817 | ||
818 | if (int_sta_1 & USB_INT_1_SPEED) | |
819 | usb3_irq_epc_int_1_speed(usb3); | |
820 | ||
821 | if (int_sta_1 & USB_INT_1_VBUS_CNG) | |
822 | usb3_irq_epc_int_1_vbus_change(usb3); | |
823 | } | |
824 | ||
825 | static struct renesas_usb3_request *__usb3_get_request(struct renesas_usb3_ep | |
826 | *usb3_ep) | |
827 | { | |
828 | return list_first_entry_or_null(&usb3_ep->queue, | |
829 | struct renesas_usb3_request, queue); | |
830 | } | |
831 | ||
832 | static struct renesas_usb3_request *usb3_get_request(struct renesas_usb3_ep | |
833 | *usb3_ep) | |
834 | { | |
835 | struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep); | |
836 | struct renesas_usb3_request *usb3_req; | |
837 | unsigned long flags; | |
838 | ||
839 | spin_lock_irqsave(&usb3->lock, flags); | |
840 | usb3_req = __usb3_get_request(usb3_ep); | |
841 | spin_unlock_irqrestore(&usb3->lock, flags); | |
842 | ||
843 | return usb3_req; | |
844 | } | |
845 | ||
aca5b9eb YS |
846 | static void __usb3_request_done(struct renesas_usb3_ep *usb3_ep, |
847 | struct renesas_usb3_request *usb3_req, | |
848 | int status) | |
746bfe63 YS |
849 | { |
850 | struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep); | |
746bfe63 YS |
851 | |
852 | dev_dbg(usb3_to_dev(usb3), "giveback: ep%2d, %u, %u, %d\n", | |
853 | usb3_ep->num, usb3_req->req.length, usb3_req->req.actual, | |
854 | status); | |
855 | usb3_req->req.status = status; | |
746bfe63 YS |
856 | usb3_ep->started = false; |
857 | list_del_init(&usb3_req->queue); | |
aca5b9eb | 858 | spin_unlock(&usb3->lock); |
746bfe63 | 859 | usb_gadget_giveback_request(&usb3_ep->ep, &usb3_req->req); |
aca5b9eb YS |
860 | spin_lock(&usb3->lock); |
861 | } | |
862 | ||
863 | static void usb3_request_done(struct renesas_usb3_ep *usb3_ep, | |
864 | struct renesas_usb3_request *usb3_req, int status) | |
865 | { | |
866 | struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep); | |
867 | unsigned long flags; | |
868 | ||
869 | spin_lock_irqsave(&usb3->lock, flags); | |
870 | __usb3_request_done(usb3_ep, usb3_req, status); | |
871 | spin_unlock_irqrestore(&usb3->lock, flags); | |
746bfe63 YS |
872 | } |
873 | ||
874 | static void usb3_irq_epc_pipe0_status_end(struct renesas_usb3 *usb3) | |
875 | { | |
876 | struct renesas_usb3_ep *usb3_ep = usb3_get_ep(usb3, 0); | |
877 | struct renesas_usb3_request *usb3_req = usb3_get_request(usb3_ep); | |
878 | ||
879 | if (usb3_req) | |
880 | usb3_request_done(usb3_ep, usb3_req, 0); | |
881 | if (usb3->test_mode) | |
882 | usb3_set_test_mode(usb3); | |
883 | } | |
884 | ||
885 | static void usb3_get_setup_data(struct renesas_usb3 *usb3, | |
886 | struct usb_ctrlrequest *ctrl) | |
887 | { | |
888 | struct renesas_usb3_ep *usb3_ep = usb3_get_ep(usb3, 0); | |
889 | u32 *data = (u32 *)ctrl; | |
890 | ||
891 | *data++ = usb3_read(usb3, USB3_STUP_DAT_0); | |
892 | *data = usb3_read(usb3, USB3_STUP_DAT_1); | |
893 | ||
894 | /* update this driver's flag */ | |
895 | usb3_ep->dir_in = !!(ctrl->bRequestType & USB_DIR_IN); | |
896 | } | |
897 | ||
898 | static void usb3_set_p0_con_update_res(struct renesas_usb3 *usb3, u32 res) | |
899 | { | |
900 | u32 val = usb3_read(usb3, USB3_P0_CON); | |
901 | ||
902 | val &= ~(P0_CON_ST_RES_MASK | P0_CON_OT_RES_MASK | P0_CON_IN_RES_MASK); | |
903 | val |= res | P0_CON_RES_WEN; | |
904 | usb3_write(usb3, val, USB3_P0_CON); | |
905 | } | |
906 | ||
907 | static void usb3_set_p0_con_for_ctrl_read_data(struct renesas_usb3 *usb3) | |
908 | { | |
909 | usb3_set_p0_con_update_res(usb3, P0_CON_ST_RES_FORCE_NRDY | | |
910 | P0_CON_OT_RES_FORCE_STALL | | |
911 | P0_CON_IN_RES_NORMAL); | |
912 | } | |
913 | ||
914 | static void usb3_set_p0_con_for_ctrl_read_status(struct renesas_usb3 *usb3) | |
915 | { | |
916 | usb3_set_p0_con_update_res(usb3, P0_CON_ST_RES_NORMAL | | |
917 | P0_CON_OT_RES_FORCE_STALL | | |
918 | P0_CON_IN_RES_NORMAL); | |
919 | } | |
920 | ||
921 | static void usb3_set_p0_con_for_ctrl_write_data(struct renesas_usb3 *usb3) | |
922 | { | |
923 | usb3_set_p0_con_update_res(usb3, P0_CON_ST_RES_FORCE_NRDY | | |
924 | P0_CON_OT_RES_NORMAL | | |
925 | P0_CON_IN_RES_FORCE_STALL); | |
926 | } | |
927 | ||
928 | static void usb3_set_p0_con_for_ctrl_write_status(struct renesas_usb3 *usb3) | |
929 | { | |
930 | usb3_set_p0_con_update_res(usb3, P0_CON_ST_RES_NORMAL | | |
931 | P0_CON_OT_RES_NORMAL | | |
932 | P0_CON_IN_RES_FORCE_STALL); | |
933 | } | |
934 | ||
935 | static void usb3_set_p0_con_for_no_data(struct renesas_usb3 *usb3) | |
936 | { | |
937 | usb3_set_p0_con_update_res(usb3, P0_CON_ST_RES_NORMAL | | |
938 | P0_CON_OT_RES_FORCE_STALL | | |
939 | P0_CON_IN_RES_FORCE_STALL); | |
940 | } | |
941 | ||
942 | static void usb3_set_p0_con_stall(struct renesas_usb3 *usb3) | |
943 | { | |
944 | usb3_set_p0_con_update_res(usb3, P0_CON_ST_RES_FORCE_STALL | | |
945 | P0_CON_OT_RES_FORCE_STALL | | |
946 | P0_CON_IN_RES_FORCE_STALL); | |
947 | } | |
948 | ||
949 | static void usb3_set_p0_con_stop(struct renesas_usb3 *usb3) | |
950 | { | |
951 | usb3_set_p0_con_update_res(usb3, P0_CON_ST_RES_FORCE_NRDY | | |
952 | P0_CON_OT_RES_FORCE_NRDY | | |
953 | P0_CON_IN_RES_FORCE_NRDY); | |
954 | } | |
955 | ||
956 | static int usb3_pn_change(struct renesas_usb3 *usb3, int num) | |
957 | { | |
958 | if (num == 0 || num > usb3->num_usb3_eps) | |
959 | return -ENXIO; | |
960 | ||
961 | usb3_write(usb3, num, USB3_PIPE_COM); | |
962 | ||
963 | return 0; | |
964 | } | |
965 | ||
966 | static void usb3_set_pn_con_update_res(struct renesas_usb3 *usb3, u32 res) | |
967 | { | |
968 | u32 val = usb3_read(usb3, USB3_PN_CON); | |
969 | ||
970 | val &= ~PN_CON_RES_MASK; | |
971 | val |= res & PN_CON_RES_MASK; | |
972 | val |= PN_CON_RES_WEN; | |
973 | usb3_write(usb3, val, USB3_PN_CON); | |
974 | } | |
975 | ||
976 | static void usb3_pn_start(struct renesas_usb3 *usb3) | |
977 | { | |
978 | usb3_set_pn_con_update_res(usb3, PN_CON_RES_NORMAL); | |
979 | } | |
980 | ||
981 | static void usb3_pn_stop(struct renesas_usb3 *usb3) | |
982 | { | |
983 | usb3_set_pn_con_update_res(usb3, PN_CON_RES_FORCE_NRDY); | |
984 | } | |
985 | ||
986 | static void usb3_pn_stall(struct renesas_usb3 *usb3) | |
987 | { | |
988 | usb3_set_pn_con_update_res(usb3, PN_CON_RES_FORCE_STALL); | |
989 | } | |
990 | ||
991 | static int usb3_pn_con_clear(struct renesas_usb3 *usb3) | |
992 | { | |
993 | usb3_set_bit(usb3, PN_CON_CLR, USB3_PN_CON); | |
994 | ||
995 | return usb3_wait(usb3, USB3_PN_CON, PN_CON_CLR, 0); | |
996 | } | |
997 | ||
998 | static bool usb3_is_transfer_complete(struct renesas_usb3_ep *usb3_ep, | |
999 | struct renesas_usb3_request *usb3_req) | |
1000 | { | |
1001 | struct usb_request *req = &usb3_req->req; | |
1002 | ||
1003 | if ((!req->zero && req->actual == req->length) || | |
1004 | (req->actual % usb3_ep->ep.maxpacket) || (req->length == 0)) | |
1005 | return true; | |
1006 | else | |
1007 | return false; | |
1008 | } | |
1009 | ||
1010 | static int usb3_wait_pipe_status(struct renesas_usb3_ep *usb3_ep, u32 mask) | |
1011 | { | |
1012 | struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep); | |
1013 | u32 sta_reg = usb3_ep->num ? USB3_PN_STA : USB3_P0_STA; | |
1014 | ||
1015 | return usb3_wait(usb3, sta_reg, mask, mask); | |
1016 | } | |
1017 | ||
1018 | static void usb3_set_px_con_send(struct renesas_usb3_ep *usb3_ep, int bytes, | |
1019 | bool last) | |
1020 | { | |
1021 | struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep); | |
1022 | u32 con_reg = usb3_ep->num ? USB3_PN_CON : USB3_P0_CON; | |
1023 | u32 val = usb3_read(usb3, con_reg); | |
1024 | ||
1025 | val |= PX_CON_SEND | PX_CON_BYTE_EN_BYTES(bytes); | |
1026 | val |= (usb3_ep->num && last) ? PN_CON_LAST : 0; | |
1027 | usb3_write(usb3, val, con_reg); | |
1028 | } | |
1029 | ||
1030 | static int usb3_write_pipe(struct renesas_usb3_ep *usb3_ep, | |
1031 | struct renesas_usb3_request *usb3_req, | |
1032 | u32 fifo_reg) | |
1033 | { | |
1034 | struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep); | |
1035 | int i; | |
1036 | int len = min_t(unsigned, usb3_req->req.length - usb3_req->req.actual, | |
1037 | usb3_ep->ep.maxpacket); | |
1038 | u8 *buf = usb3_req->req.buf + usb3_req->req.actual; | |
1039 | u32 tmp = 0; | |
447b8a01 | 1040 | bool is_last = !len ? true : false; |
746bfe63 YS |
1041 | |
1042 | if (usb3_wait_pipe_status(usb3_ep, PX_STA_BUFSTS) < 0) | |
1043 | return -EBUSY; | |
1044 | ||
1045 | /* Update gadget driver parameter */ | |
1046 | usb3_req->req.actual += len; | |
1047 | ||
1048 | /* Write data to the register */ | |
1049 | if (len >= 4) { | |
1050 | iowrite32_rep(usb3->reg + fifo_reg, buf, len / 4); | |
1051 | buf += (len / 4) * 4; | |
1052 | len %= 4; /* update len to use usb3_set_pX_con_send() */ | |
1053 | } | |
1054 | ||
1055 | if (len) { | |
1056 | for (i = 0; i < len; i++) | |
1057 | tmp |= buf[i] << (8 * i); | |
1058 | usb3_write(usb3, tmp, fifo_reg); | |
1059 | } | |
1060 | ||
447b8a01 YS |
1061 | if (!is_last) |
1062 | is_last = usb3_is_transfer_complete(usb3_ep, usb3_req); | |
746bfe63 YS |
1063 | /* Send the data */ |
1064 | usb3_set_px_con_send(usb3_ep, len, is_last); | |
1065 | ||
1066 | return is_last ? 0 : -EAGAIN; | |
1067 | } | |
1068 | ||
1069 | static u32 usb3_get_received_length(struct renesas_usb3_ep *usb3_ep) | |
1070 | { | |
1071 | struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep); | |
1072 | u32 lng_reg = usb3_ep->num ? USB3_PN_LNG : USB3_P0_LNG; | |
1073 | ||
1074 | return usb3_read(usb3, lng_reg); | |
1075 | } | |
1076 | ||
1077 | static int usb3_read_pipe(struct renesas_usb3_ep *usb3_ep, | |
1078 | struct renesas_usb3_request *usb3_req, u32 fifo_reg) | |
1079 | { | |
1080 | struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep); | |
1081 | int i; | |
1082 | int len = min_t(unsigned, usb3_req->req.length - usb3_req->req.actual, | |
1083 | usb3_get_received_length(usb3_ep)); | |
1084 | u8 *buf = usb3_req->req.buf + usb3_req->req.actual; | |
1085 | u32 tmp = 0; | |
1086 | ||
1087 | if (!len) | |
1088 | return 0; | |
1089 | ||
1090 | /* Update gadget driver parameter */ | |
1091 | usb3_req->req.actual += len; | |
1092 | ||
1093 | /* Read data from the register */ | |
1094 | if (len >= 4) { | |
1095 | ioread32_rep(usb3->reg + fifo_reg, buf, len / 4); | |
1096 | buf += (len / 4) * 4; | |
1097 | len %= 4; | |
1098 | } | |
1099 | ||
1100 | if (len) { | |
1101 | tmp = usb3_read(usb3, fifo_reg); | |
1102 | for (i = 0; i < len; i++) | |
1103 | buf[i] = (tmp >> (8 * i)) & 0xff; | |
1104 | } | |
1105 | ||
1106 | return usb3_is_transfer_complete(usb3_ep, usb3_req) ? 0 : -EAGAIN; | |
1107 | } | |
1108 | ||
1109 | static void usb3_set_status_stage(struct renesas_usb3_ep *usb3_ep, | |
1110 | struct renesas_usb3_request *usb3_req) | |
1111 | { | |
1112 | struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep); | |
1113 | ||
1114 | if (usb3_ep->dir_in) { | |
1115 | usb3_set_p0_con_for_ctrl_read_status(usb3); | |
1116 | } else { | |
1117 | if (!usb3_req->req.length) | |
1118 | usb3_set_p0_con_for_no_data(usb3); | |
1119 | else | |
1120 | usb3_set_p0_con_for_ctrl_write_status(usb3); | |
1121 | } | |
1122 | } | |
1123 | ||
1124 | static void usb3_p0_xfer(struct renesas_usb3_ep *usb3_ep, | |
1125 | struct renesas_usb3_request *usb3_req) | |
1126 | { | |
1127 | int ret = -EAGAIN; | |
1128 | ||
1129 | if (usb3_ep->dir_in) | |
1130 | ret = usb3_write_pipe(usb3_ep, usb3_req, USB3_P0_WRITE); | |
1131 | else | |
1132 | ret = usb3_read_pipe(usb3_ep, usb3_req, USB3_P0_READ); | |
1133 | ||
1134 | if (!ret) | |
1135 | usb3_set_status_stage(usb3_ep, usb3_req); | |
1136 | } | |
1137 | ||
1138 | static void usb3_start_pipe0(struct renesas_usb3_ep *usb3_ep, | |
1139 | struct renesas_usb3_request *usb3_req) | |
1140 | { | |
1141 | struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep); | |
1142 | ||
1143 | if (usb3_ep->started) | |
1144 | return; | |
1145 | ||
1146 | usb3_ep->started = true; | |
1147 | ||
1148 | if (usb3_ep->dir_in) { | |
1149 | usb3_set_bit(usb3, P0_MOD_DIR, USB3_P0_MOD); | |
1150 | usb3_set_p0_con_for_ctrl_read_data(usb3); | |
1151 | } else { | |
1152 | usb3_clear_bit(usb3, P0_MOD_DIR, USB3_P0_MOD); | |
4dcf4bab YS |
1153 | if (usb3_req->req.length) |
1154 | usb3_set_p0_con_for_ctrl_write_data(usb3); | |
746bfe63 YS |
1155 | } |
1156 | ||
1157 | usb3_p0_xfer(usb3_ep, usb3_req); | |
1158 | } | |
1159 | ||
2d4aa21a YS |
1160 | static void usb3_enable_dma_pipen(struct renesas_usb3 *usb3) |
1161 | { | |
1162 | usb3_set_bit(usb3, PN_CON_DATAIF_EN, USB3_PN_CON); | |
1163 | } | |
1164 | ||
1165 | static void usb3_disable_dma_pipen(struct renesas_usb3 *usb3) | |
1166 | { | |
1167 | usb3_clear_bit(usb3, PN_CON_DATAIF_EN, USB3_PN_CON); | |
1168 | } | |
1169 | ||
1170 | static void usb3_enable_dma_irq(struct renesas_usb3 *usb3, int num) | |
1171 | { | |
1172 | usb3_set_bit(usb3, DMA_INT(num), USB3_DMA_INT_ENA); | |
1173 | } | |
1174 | ||
1175 | static void usb3_disable_dma_irq(struct renesas_usb3 *usb3, int num) | |
1176 | { | |
1177 | usb3_clear_bit(usb3, DMA_INT(num), USB3_DMA_INT_ENA); | |
1178 | } | |
1179 | ||
1180 | static u32 usb3_dma_mps_to_prd_word1(struct renesas_usb3_ep *usb3_ep) | |
1181 | { | |
1182 | switch (usb3_ep->ep.maxpacket) { | |
1183 | case 8: | |
1184 | return USB3_PRD1_MPS_8; | |
1185 | case 16: | |
1186 | return USB3_PRD1_MPS_16; | |
1187 | case 32: | |
1188 | return USB3_PRD1_MPS_32; | |
1189 | case 64: | |
1190 | return USB3_PRD1_MPS_64; | |
1191 | case 512: | |
1192 | return USB3_PRD1_MPS_512; | |
1193 | case 1024: | |
1194 | return USB3_PRD1_MPS_1024; | |
1195 | default: | |
1196 | return USB3_PRD1_MPS_RESERVED; | |
1197 | } | |
1198 | } | |
1199 | ||
1200 | static bool usb3_dma_get_setting_area(struct renesas_usb3_ep *usb3_ep, | |
1201 | struct renesas_usb3_request *usb3_req) | |
1202 | { | |
1203 | struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep); | |
1204 | struct renesas_usb3_dma *dma; | |
1205 | int i; | |
1206 | bool ret = false; | |
1207 | ||
1208 | if (usb3_req->req.length > USB3_DMA_MAX_XFER_SIZE_ALL_PRDS) { | |
1209 | dev_dbg(usb3_to_dev(usb3), "%s: the length is too big (%d)\n", | |
1210 | __func__, usb3_req->req.length); | |
1211 | return false; | |
1212 | } | |
1213 | ||
1214 | /* The driver doesn't handle zero-length packet via dmac */ | |
1215 | if (!usb3_req->req.length) | |
1216 | return false; | |
1217 | ||
1218 | if (usb3_dma_mps_to_prd_word1(usb3_ep) == USB3_PRD1_MPS_RESERVED) | |
1219 | return false; | |
1220 | ||
1221 | usb3_for_each_dma(usb3, dma, i) { | |
1222 | if (dma->used) | |
1223 | continue; | |
1224 | ||
1225 | if (usb_gadget_map_request(&usb3->gadget, &usb3_req->req, | |
1226 | usb3_ep->dir_in) < 0) | |
1227 | break; | |
1228 | ||
1229 | dma->used = true; | |
1230 | usb3_ep->dma = dma; | |
1231 | ret = true; | |
1232 | break; | |
1233 | } | |
1234 | ||
1235 | return ret; | |
1236 | } | |
1237 | ||
1238 | static void usb3_dma_put_setting_area(struct renesas_usb3_ep *usb3_ep, | |
1239 | struct renesas_usb3_request *usb3_req) | |
1240 | { | |
1241 | struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep); | |
1242 | int i; | |
1243 | struct renesas_usb3_dma *dma; | |
1244 | ||
1245 | usb3_for_each_dma(usb3, dma, i) { | |
1246 | if (usb3_ep->dma == dma) { | |
1247 | usb_gadget_unmap_request(&usb3->gadget, &usb3_req->req, | |
1248 | usb3_ep->dir_in); | |
1249 | dma->used = false; | |
1250 | usb3_ep->dma = NULL; | |
1251 | break; | |
1252 | } | |
1253 | } | |
1254 | } | |
1255 | ||
1256 | static void usb3_dma_fill_prd(struct renesas_usb3_ep *usb3_ep, | |
1257 | struct renesas_usb3_request *usb3_req) | |
1258 | { | |
1259 | struct renesas_usb3_prd *cur_prd = usb3_ep->dma->prd; | |
1260 | u32 remain = usb3_req->req.length; | |
1261 | u32 dma = usb3_req->req.dma; | |
1262 | u32 len; | |
1263 | int i = 0; | |
1264 | ||
1265 | do { | |
1266 | len = min_t(u32, remain, USB3_DMA_MAX_XFER_SIZE) & | |
1267 | USB3_PRD1_SIZE_MASK; | |
1268 | cur_prd->word1 = usb3_dma_mps_to_prd_word1(usb3_ep) | | |
1269 | USB3_PRD1_B_INC | len; | |
1270 | cur_prd->bap = dma; | |
1271 | remain -= len; | |
1272 | dma += len; | |
1273 | if (!remain || (i + 1) < USB3_DMA_NUM_PRD_ENTRIES) | |
1274 | break; | |
1275 | ||
1276 | cur_prd++; | |
1277 | i++; | |
1278 | } while (1); | |
1279 | ||
1280 | cur_prd->word1 |= USB3_PRD1_E | USB3_PRD1_INT; | |
1281 | if (usb3_ep->dir_in) | |
1282 | cur_prd->word1 |= USB3_PRD1_LST; | |
1283 | } | |
1284 | ||
1285 | static void usb3_dma_kick_prd(struct renesas_usb3_ep *usb3_ep) | |
1286 | { | |
1287 | struct renesas_usb3_dma *dma = usb3_ep->dma; | |
1288 | struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep); | |
1289 | u32 dma_con = DMA_COM_PIPE_NO(usb3_ep->num) | DMA_CON_PRD_EN; | |
1290 | ||
1291 | if (usb3_ep->dir_in) | |
1292 | dma_con |= DMA_CON_PIPE_DIR; | |
1293 | ||
1294 | wmb(); /* prd entries should be in system memory here */ | |
1295 | ||
1296 | usb3_write(usb3, 1 << usb3_ep->num, USB3_DMA_INT_STA); | |
1297 | usb3_write(usb3, AXI_INT_PRDEN_CLR_STA(dma->num) | | |
1298 | AXI_INT_PRDERR_STA(dma->num), USB3_AXI_INT_STA); | |
1299 | ||
1300 | usb3_write(usb3, dma->prd_dma, USB3_DMA_CH0_PRD_ADR(dma->num)); | |
1301 | usb3_write(usb3, dma_con, USB3_DMA_CH0_CON(dma->num)); | |
1302 | usb3_enable_dma_irq(usb3, usb3_ep->num); | |
1303 | } | |
1304 | ||
1305 | static void usb3_dma_stop_prd(struct renesas_usb3_ep *usb3_ep) | |
1306 | { | |
1307 | struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep); | |
1308 | struct renesas_usb3_dma *dma = usb3_ep->dma; | |
1309 | ||
1310 | usb3_disable_dma_irq(usb3, usb3_ep->num); | |
1311 | usb3_write(usb3, 0, USB3_DMA_CH0_CON(dma->num)); | |
1312 | } | |
1313 | ||
1314 | static int usb3_dma_update_status(struct renesas_usb3_ep *usb3_ep, | |
1315 | struct renesas_usb3_request *usb3_req) | |
1316 | { | |
1317 | struct renesas_usb3_prd *cur_prd = usb3_ep->dma->prd; | |
1318 | struct usb_request *req = &usb3_req->req; | |
1319 | u32 remain, len; | |
1320 | int i = 0; | |
1321 | int status = 0; | |
1322 | ||
1323 | rmb(); /* The controller updated prd entries */ | |
1324 | ||
1325 | do { | |
1326 | if (cur_prd->word1 & USB3_PRD1_D) | |
1327 | status = -EIO; | |
1328 | if (cur_prd->word1 & USB3_PRD1_E) | |
1329 | len = req->length % USB3_DMA_MAX_XFER_SIZE; | |
1330 | else | |
1331 | len = USB3_DMA_MAX_XFER_SIZE; | |
1332 | remain = cur_prd->word1 & USB3_PRD1_SIZE_MASK; | |
1333 | req->actual += len - remain; | |
1334 | ||
1335 | if (cur_prd->word1 & USB3_PRD1_E || | |
1336 | (i + 1) < USB3_DMA_NUM_PRD_ENTRIES) | |
1337 | break; | |
1338 | ||
1339 | cur_prd++; | |
1340 | i++; | |
1341 | } while (1); | |
1342 | ||
1343 | return status; | |
1344 | } | |
1345 | ||
1346 | static bool usb3_dma_try_start(struct renesas_usb3_ep *usb3_ep, | |
1347 | struct renesas_usb3_request *usb3_req) | |
1348 | { | |
1349 | struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep); | |
1350 | ||
1351 | if (!use_dma) | |
1352 | return false; | |
1353 | ||
1354 | if (usb3_dma_get_setting_area(usb3_ep, usb3_req)) { | |
1355 | usb3_pn_stop(usb3); | |
1356 | usb3_enable_dma_pipen(usb3); | |
1357 | usb3_dma_fill_prd(usb3_ep, usb3_req); | |
1358 | usb3_dma_kick_prd(usb3_ep); | |
1359 | usb3_pn_start(usb3); | |
1360 | return true; | |
1361 | } | |
1362 | ||
1363 | return false; | |
1364 | } | |
1365 | ||
1366 | static int usb3_dma_try_stop(struct renesas_usb3_ep *usb3_ep, | |
1367 | struct renesas_usb3_request *usb3_req) | |
1368 | { | |
1369 | struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep); | |
1370 | unsigned long flags; | |
1371 | int status = 0; | |
1372 | ||
1373 | spin_lock_irqsave(&usb3->lock, flags); | |
1374 | if (!usb3_ep->dma) | |
1375 | goto out; | |
1376 | ||
1377 | if (!usb3_pn_change(usb3, usb3_ep->num)) | |
1378 | usb3_disable_dma_pipen(usb3); | |
1379 | usb3_dma_stop_prd(usb3_ep); | |
1380 | status = usb3_dma_update_status(usb3_ep, usb3_req); | |
1381 | usb3_dma_put_setting_area(usb3_ep, usb3_req); | |
1382 | ||
1383 | out: | |
1384 | spin_unlock_irqrestore(&usb3->lock, flags); | |
1385 | return status; | |
1386 | } | |
1387 | ||
1388 | static int renesas_usb3_dma_free_prd(struct renesas_usb3 *usb3, | |
1389 | struct device *dev) | |
1390 | { | |
1391 | int i; | |
1392 | struct renesas_usb3_dma *dma; | |
1393 | ||
1394 | usb3_for_each_dma(usb3, dma, i) { | |
1395 | if (dma->prd) { | |
80584efc | 1396 | dma_free_coherent(dev, USB3_DMA_PRD_SIZE, |
2d4aa21a YS |
1397 | dma->prd, dma->prd_dma); |
1398 | dma->prd = NULL; | |
1399 | } | |
1400 | } | |
1401 | ||
1402 | return 0; | |
1403 | } | |
1404 | ||
1405 | static int renesas_usb3_dma_alloc_prd(struct renesas_usb3 *usb3, | |
1406 | struct device *dev) | |
1407 | { | |
1408 | int i; | |
1409 | struct renesas_usb3_dma *dma; | |
1410 | ||
1411 | if (!use_dma) | |
1412 | return 0; | |
1413 | ||
1414 | usb3_for_each_dma(usb3, dma, i) { | |
1415 | dma->prd = dma_alloc_coherent(dev, USB3_DMA_PRD_SIZE, | |
1416 | &dma->prd_dma, GFP_KERNEL); | |
1417 | if (!dma->prd) { | |
1418 | renesas_usb3_dma_free_prd(usb3, dev); | |
1419 | return -ENOMEM; | |
1420 | } | |
1421 | dma->num = i + 1; | |
1422 | } | |
1423 | ||
1424 | return 0; | |
1425 | } | |
1426 | ||
746bfe63 YS |
1427 | static void usb3_start_pipen(struct renesas_usb3_ep *usb3_ep, |
1428 | struct renesas_usb3_request *usb3_req) | |
1429 | { | |
1430 | struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep); | |
1431 | struct renesas_usb3_request *usb3_req_first = usb3_get_request(usb3_ep); | |
1432 | unsigned long flags; | |
1433 | int ret = -EAGAIN; | |
1434 | u32 enable_bits = 0; | |
1435 | ||
781001ff | 1436 | spin_lock_irqsave(&usb3->lock, flags); |
746bfe63 | 1437 | if (usb3_ep->halt || usb3_ep->started) |
781001ff | 1438 | goto out; |
746bfe63 | 1439 | if (usb3_req != usb3_req_first) |
781001ff | 1440 | goto out; |
746bfe63 | 1441 | |
746bfe63 YS |
1442 | if (usb3_pn_change(usb3, usb3_ep->num) < 0) |
1443 | goto out; | |
1444 | ||
1445 | usb3_ep->started = true; | |
2d4aa21a YS |
1446 | |
1447 | if (usb3_dma_try_start(usb3_ep, usb3_req)) | |
1448 | goto out; | |
1449 | ||
746bfe63 YS |
1450 | usb3_pn_start(usb3); |
1451 | ||
1452 | if (usb3_ep->dir_in) { | |
1453 | ret = usb3_write_pipe(usb3_ep, usb3_req, USB3_PN_WRITE); | |
1454 | enable_bits |= PN_INT_LSTTR; | |
1455 | } | |
1456 | ||
1457 | if (ret < 0) | |
1458 | enable_bits |= PN_INT_BFRDY; | |
1459 | ||
1460 | if (enable_bits) { | |
1461 | usb3_set_bit(usb3, enable_bits, USB3_PN_INT_ENA); | |
1462 | usb3_enable_pipe_irq(usb3, usb3_ep->num); | |
1463 | } | |
1464 | out: | |
1465 | spin_unlock_irqrestore(&usb3->lock, flags); | |
1466 | } | |
1467 | ||
1468 | static int renesas_usb3_ep_queue(struct usb_ep *_ep, struct usb_request *_req, | |
1469 | gfp_t gfp_flags) | |
1470 | { | |
1471 | struct renesas_usb3_ep *usb3_ep = usb_ep_to_usb3_ep(_ep); | |
1472 | struct renesas_usb3_request *usb3_req = usb_req_to_usb3_req(_req); | |
1473 | struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep); | |
1474 | unsigned long flags; | |
1475 | ||
1476 | dev_dbg(usb3_to_dev(usb3), "ep_queue: ep%2d, %u\n", usb3_ep->num, | |
1477 | _req->length); | |
1478 | ||
1479 | _req->status = -EINPROGRESS; | |
1480 | _req->actual = 0; | |
1481 | spin_lock_irqsave(&usb3->lock, flags); | |
1482 | list_add_tail(&usb3_req->queue, &usb3_ep->queue); | |
1483 | spin_unlock_irqrestore(&usb3->lock, flags); | |
1484 | ||
1485 | if (!usb3_ep->num) | |
1486 | usb3_start_pipe0(usb3_ep, usb3_req); | |
1487 | else | |
1488 | usb3_start_pipen(usb3_ep, usb3_req); | |
1489 | ||
1490 | return 0; | |
1491 | } | |
1492 | ||
1493 | static void usb3_set_device_address(struct renesas_usb3 *usb3, u16 addr) | |
1494 | { | |
1495 | /* DEV_ADDR bit field is cleared by WarmReset, HotReset and BusReset */ | |
1496 | usb3_set_bit(usb3, USB_COM_CON_DEV_ADDR(addr), USB3_USB_COM_CON); | |
1497 | } | |
1498 | ||
1499 | static bool usb3_std_req_set_address(struct renesas_usb3 *usb3, | |
1500 | struct usb_ctrlrequest *ctrl) | |
1501 | { | |
1502 | if (ctrl->wValue >= 128) | |
1503 | return true; /* stall */ | |
1504 | ||
1505 | usb3_set_device_address(usb3, ctrl->wValue); | |
1506 | usb3_set_p0_con_for_no_data(usb3); | |
1507 | ||
1508 | return false; | |
1509 | } | |
1510 | ||
1511 | static void usb3_pipe0_internal_xfer(struct renesas_usb3 *usb3, | |
1512 | void *tx_data, size_t len, | |
1513 | void (*complete)(struct usb_ep *ep, | |
1514 | struct usb_request *req)) | |
1515 | { | |
1516 | struct renesas_usb3_ep *usb3_ep = usb3_get_ep(usb3, 0); | |
1517 | ||
1518 | if (tx_data) | |
1519 | memcpy(usb3->ep0_buf, tx_data, | |
1520 | min_t(size_t, len, USB3_EP0_BUF_SIZE)); | |
1521 | ||
1522 | usb3->ep0_req->buf = &usb3->ep0_buf; | |
1523 | usb3->ep0_req->length = len; | |
1524 | usb3->ep0_req->complete = complete; | |
1525 | renesas_usb3_ep_queue(&usb3_ep->ep, usb3->ep0_req, GFP_ATOMIC); | |
1526 | } | |
1527 | ||
1528 | static void usb3_pipe0_get_status_completion(struct usb_ep *ep, | |
1529 | struct usb_request *req) | |
1530 | { | |
1531 | } | |
1532 | ||
1533 | static bool usb3_std_req_get_status(struct renesas_usb3 *usb3, | |
1534 | struct usb_ctrlrequest *ctrl) | |
1535 | { | |
1536 | bool stall = false; | |
1537 | struct renesas_usb3_ep *usb3_ep; | |
1538 | int num; | |
1539 | u16 status = 0; | |
1540 | ||
1541 | switch (ctrl->bRequestType & USB_RECIP_MASK) { | |
1542 | case USB_RECIP_DEVICE: | |
1543 | if (usb3->gadget.is_selfpowered) | |
1544 | status |= 1 << USB_DEVICE_SELF_POWERED; | |
1545 | if (usb3->gadget.speed == USB_SPEED_SUPER) | |
1546 | status |= usb3_feature_get_un_enabled(usb3); | |
1547 | break; | |
1548 | case USB_RECIP_INTERFACE: | |
1549 | break; | |
1550 | case USB_RECIP_ENDPOINT: | |
1551 | num = le16_to_cpu(ctrl->wIndex) & USB_ENDPOINT_NUMBER_MASK; | |
1552 | usb3_ep = usb3_get_ep(usb3, num); | |
1553 | if (usb3_ep->halt) | |
1554 | status |= 1 << USB_ENDPOINT_HALT; | |
1555 | break; | |
1556 | default: | |
1557 | stall = true; | |
1558 | break; | |
1559 | } | |
1560 | ||
1561 | if (!stall) { | |
1562 | status = cpu_to_le16(status); | |
1563 | dev_dbg(usb3_to_dev(usb3), "get_status: req = %p\n", | |
1564 | usb_req_to_usb3_req(usb3->ep0_req)); | |
1565 | usb3_pipe0_internal_xfer(usb3, &status, sizeof(status), | |
1566 | usb3_pipe0_get_status_completion); | |
1567 | } | |
1568 | ||
1569 | return stall; | |
1570 | } | |
1571 | ||
1572 | static bool usb3_std_req_feature_device(struct renesas_usb3 *usb3, | |
1573 | struct usb_ctrlrequest *ctrl, bool set) | |
1574 | { | |
1575 | bool stall = true; | |
1576 | u16 w_value = le16_to_cpu(ctrl->wValue); | |
1577 | ||
1578 | switch (w_value) { | |
1579 | case USB_DEVICE_TEST_MODE: | |
1580 | if (!set) | |
1581 | break; | |
1582 | usb3->test_mode = le16_to_cpu(ctrl->wIndex) >> 8; | |
1583 | stall = false; | |
1584 | break; | |
1585 | case USB_DEVICE_U1_ENABLE: | |
1586 | case USB_DEVICE_U2_ENABLE: | |
1587 | if (usb3->gadget.speed != USB_SPEED_SUPER) | |
1588 | break; | |
1589 | if (w_value == USB_DEVICE_U1_ENABLE) | |
1590 | usb3_feature_u1_enable(usb3, set); | |
1591 | if (w_value == USB_DEVICE_U2_ENABLE) | |
1592 | usb3_feature_u2_enable(usb3, set); | |
1593 | stall = false; | |
1594 | break; | |
1595 | default: | |
1596 | break; | |
1597 | } | |
1598 | ||
1599 | return stall; | |
1600 | } | |
1601 | ||
1602 | static int usb3_set_halt_p0(struct renesas_usb3_ep *usb3_ep, bool halt) | |
1603 | { | |
1604 | struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep); | |
1605 | ||
1606 | if (unlikely(usb3_ep->num)) | |
1607 | return -EINVAL; | |
1608 | ||
1609 | usb3_ep->halt = halt; | |
1610 | if (halt) | |
1611 | usb3_set_p0_con_stall(usb3); | |
1612 | else | |
1613 | usb3_set_p0_con_stop(usb3); | |
1614 | ||
1615 | return 0; | |
1616 | } | |
1617 | ||
1618 | static int usb3_set_halt_pn(struct renesas_usb3_ep *usb3_ep, bool halt, | |
1619 | bool is_clear_feature) | |
1620 | { | |
1621 | struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep); | |
1622 | unsigned long flags; | |
1623 | ||
1624 | spin_lock_irqsave(&usb3->lock, flags); | |
1625 | if (!usb3_pn_change(usb3, usb3_ep->num)) { | |
1626 | usb3_ep->halt = halt; | |
1627 | if (halt) { | |
1628 | usb3_pn_stall(usb3); | |
1629 | } else if (!is_clear_feature || !usb3_ep->wedge) { | |
1630 | usb3_pn_con_clear(usb3); | |
1631 | usb3_set_bit(usb3, PN_CON_EN, USB3_PN_CON); | |
1632 | usb3_pn_stop(usb3); | |
1633 | } | |
1634 | } | |
1635 | spin_unlock_irqrestore(&usb3->lock, flags); | |
1636 | ||
1637 | return 0; | |
1638 | } | |
1639 | ||
1640 | static int usb3_set_halt(struct renesas_usb3_ep *usb3_ep, bool halt, | |
1641 | bool is_clear_feature) | |
1642 | { | |
1643 | int ret = 0; | |
1644 | ||
1645 | if (halt && usb3_ep->started) | |
1646 | return -EAGAIN; | |
1647 | ||
1648 | if (usb3_ep->num) | |
1649 | ret = usb3_set_halt_pn(usb3_ep, halt, is_clear_feature); | |
1650 | else | |
1651 | ret = usb3_set_halt_p0(usb3_ep, halt); | |
1652 | ||
1653 | return ret; | |
1654 | } | |
1655 | ||
1656 | static bool usb3_std_req_feature_endpoint(struct renesas_usb3 *usb3, | |
1657 | struct usb_ctrlrequest *ctrl, | |
1658 | bool set) | |
1659 | { | |
1660 | int num = le16_to_cpu(ctrl->wIndex) & USB_ENDPOINT_NUMBER_MASK; | |
1661 | struct renesas_usb3_ep *usb3_ep; | |
1662 | struct renesas_usb3_request *usb3_req; | |
1663 | ||
1664 | if (le16_to_cpu(ctrl->wValue) != USB_ENDPOINT_HALT) | |
1665 | return true; /* stall */ | |
1666 | ||
1667 | usb3_ep = usb3_get_ep(usb3, num); | |
1668 | usb3_set_halt(usb3_ep, set, true); | |
1669 | ||
1670 | /* Restarts a queue if clear feature */ | |
1671 | if (!set) { | |
1672 | usb3_ep->started = false; | |
1673 | usb3_req = usb3_get_request(usb3_ep); | |
1674 | if (usb3_req) | |
1675 | usb3_start_pipen(usb3_ep, usb3_req); | |
1676 | } | |
1677 | ||
1678 | return false; | |
1679 | } | |
1680 | ||
1681 | static bool usb3_std_req_feature(struct renesas_usb3 *usb3, | |
1682 | struct usb_ctrlrequest *ctrl, bool set) | |
1683 | { | |
1684 | bool stall = false; | |
1685 | ||
1686 | switch (ctrl->bRequestType & USB_RECIP_MASK) { | |
1687 | case USB_RECIP_DEVICE: | |
1688 | stall = usb3_std_req_feature_device(usb3, ctrl, set); | |
1689 | break; | |
1690 | case USB_RECIP_INTERFACE: | |
1691 | break; | |
1692 | case USB_RECIP_ENDPOINT: | |
1693 | stall = usb3_std_req_feature_endpoint(usb3, ctrl, set); | |
1694 | break; | |
1695 | default: | |
1696 | stall = true; | |
1697 | break; | |
1698 | } | |
1699 | ||
1700 | if (!stall) | |
1701 | usb3_set_p0_con_for_no_data(usb3); | |
1702 | ||
1703 | return stall; | |
1704 | } | |
1705 | ||
1706 | static void usb3_pipe0_set_sel_completion(struct usb_ep *ep, | |
1707 | struct usb_request *req) | |
1708 | { | |
1709 | /* TODO */ | |
1710 | } | |
1711 | ||
1712 | static bool usb3_std_req_set_sel(struct renesas_usb3 *usb3, | |
1713 | struct usb_ctrlrequest *ctrl) | |
1714 | { | |
1715 | u16 w_length = le16_to_cpu(ctrl->wLength); | |
1716 | ||
1717 | if (w_length != 6) | |
1718 | return true; /* stall */ | |
1719 | ||
1720 | dev_dbg(usb3_to_dev(usb3), "set_sel: req = %p\n", | |
1721 | usb_req_to_usb3_req(usb3->ep0_req)); | |
1722 | usb3_pipe0_internal_xfer(usb3, NULL, 6, usb3_pipe0_set_sel_completion); | |
1723 | ||
1724 | return false; | |
1725 | } | |
1726 | ||
1727 | static bool usb3_std_req_set_configuration(struct renesas_usb3 *usb3, | |
1728 | struct usb_ctrlrequest *ctrl) | |
1729 | { | |
1730 | if (ctrl->wValue > 0) | |
1731 | usb3_set_bit(usb3, USB_COM_CON_CONF, USB3_USB_COM_CON); | |
1732 | else | |
1733 | usb3_clear_bit(usb3, USB_COM_CON_CONF, USB3_USB_COM_CON); | |
1734 | ||
1735 | return false; | |
1736 | } | |
1737 | ||
1738 | /** | |
1739 | * usb3_handle_standard_request - handle some standard requests | |
1740 | * @usb3: the renesas_usb3 pointer | |
1741 | * @ctrl: a pointer of setup data | |
1742 | * | |
1743 | * Returns true if this function handled a standard request | |
1744 | */ | |
1745 | static bool usb3_handle_standard_request(struct renesas_usb3 *usb3, | |
1746 | struct usb_ctrlrequest *ctrl) | |
1747 | { | |
1748 | bool ret = false; | |
1749 | bool stall = false; | |
1750 | ||
1751 | if ((ctrl->bRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD) { | |
1752 | switch (ctrl->bRequest) { | |
1753 | case USB_REQ_SET_ADDRESS: | |
1754 | stall = usb3_std_req_set_address(usb3, ctrl); | |
1755 | ret = true; | |
1756 | break; | |
1757 | case USB_REQ_GET_STATUS: | |
1758 | stall = usb3_std_req_get_status(usb3, ctrl); | |
1759 | ret = true; | |
1760 | break; | |
1761 | case USB_REQ_CLEAR_FEATURE: | |
1762 | stall = usb3_std_req_feature(usb3, ctrl, false); | |
1763 | ret = true; | |
1764 | break; | |
1765 | case USB_REQ_SET_FEATURE: | |
1766 | stall = usb3_std_req_feature(usb3, ctrl, true); | |
1767 | ret = true; | |
1768 | break; | |
1769 | case USB_REQ_SET_SEL: | |
1770 | stall = usb3_std_req_set_sel(usb3, ctrl); | |
1771 | ret = true; | |
1772 | break; | |
1773 | case USB_REQ_SET_ISOCH_DELAY: | |
1774 | /* This hardware doesn't support Isochronous xfer */ | |
1775 | stall = true; | |
1776 | ret = true; | |
1777 | break; | |
1778 | case USB_REQ_SET_CONFIGURATION: | |
1779 | usb3_std_req_set_configuration(usb3, ctrl); | |
1780 | break; | |
1781 | default: | |
1782 | break; | |
1783 | } | |
1784 | } | |
1785 | ||
1786 | if (stall) | |
1787 | usb3_set_p0_con_stall(usb3); | |
1788 | ||
1789 | return ret; | |
1790 | } | |
1791 | ||
1792 | static int usb3_p0_con_clear_buffer(struct renesas_usb3 *usb3) | |
1793 | { | |
1794 | usb3_set_bit(usb3, P0_CON_BCLR, USB3_P0_CON); | |
1795 | ||
1796 | return usb3_wait(usb3, USB3_P0_CON, P0_CON_BCLR, 0); | |
1797 | } | |
1798 | ||
1799 | static void usb3_irq_epc_pipe0_setup(struct renesas_usb3 *usb3) | |
1800 | { | |
1801 | struct usb_ctrlrequest ctrl; | |
1802 | struct renesas_usb3_ep *usb3_ep = usb3_get_ep(usb3, 0); | |
1803 | ||
1804 | /* Call giveback function if previous transfer is not completed */ | |
1805 | if (usb3_ep->started) | |
1806 | usb3_request_done(usb3_ep, usb3_get_request(usb3_ep), | |
1807 | -ECONNRESET); | |
1808 | ||
1809 | usb3_p0_con_clear_buffer(usb3); | |
1810 | usb3_get_setup_data(usb3, &ctrl); | |
1811 | if (!usb3_handle_standard_request(usb3, &ctrl)) | |
1812 | if (usb3->driver->setup(&usb3->gadget, &ctrl) < 0) | |
1813 | usb3_set_p0_con_stall(usb3); | |
1814 | } | |
1815 | ||
1816 | static void usb3_irq_epc_pipe0_bfrdy(struct renesas_usb3 *usb3) | |
1817 | { | |
1818 | struct renesas_usb3_ep *usb3_ep = usb3_get_ep(usb3, 0); | |
1819 | struct renesas_usb3_request *usb3_req = usb3_get_request(usb3_ep); | |
1820 | ||
1821 | if (!usb3_req) | |
1822 | return; | |
1823 | ||
1824 | usb3_p0_xfer(usb3_ep, usb3_req); | |
1825 | } | |
1826 | ||
1827 | static void usb3_irq_epc_pipe0(struct renesas_usb3 *usb3) | |
1828 | { | |
1829 | u32 p0_int_sta = usb3_read(usb3, USB3_P0_INT_STA); | |
1830 | ||
1831 | p0_int_sta &= usb3_read(usb3, USB3_P0_INT_ENA); | |
1832 | usb3_write(usb3, p0_int_sta, USB3_P0_INT_STA); | |
1833 | if (p0_int_sta & P0_INT_STSED) | |
1834 | usb3_irq_epc_pipe0_status_end(usb3); | |
1835 | if (p0_int_sta & P0_INT_SETUP) | |
1836 | usb3_irq_epc_pipe0_setup(usb3); | |
1837 | if (p0_int_sta & P0_INT_BFRDY) | |
1838 | usb3_irq_epc_pipe0_bfrdy(usb3); | |
1839 | } | |
1840 | ||
1841 | static void usb3_request_done_pipen(struct renesas_usb3 *usb3, | |
1842 | struct renesas_usb3_ep *usb3_ep, | |
1843 | struct renesas_usb3_request *usb3_req, | |
1844 | int status) | |
1845 | { | |
940f538a YS |
1846 | unsigned long flags; |
1847 | ||
1848 | spin_lock_irqsave(&usb3->lock, flags); | |
1849 | if (usb3_pn_change(usb3, usb3_ep->num)) | |
1850 | usb3_pn_stop(usb3); | |
1851 | spin_unlock_irqrestore(&usb3->lock, flags); | |
1852 | ||
746bfe63 YS |
1853 | usb3_disable_pipe_irq(usb3, usb3_ep->num); |
1854 | usb3_request_done(usb3_ep, usb3_req, status); | |
1855 | ||
1856 | /* get next usb3_req */ | |
1857 | usb3_req = usb3_get_request(usb3_ep); | |
1858 | if (usb3_req) | |
1859 | usb3_start_pipen(usb3_ep, usb3_req); | |
1860 | } | |
1861 | ||
1862 | static void usb3_irq_epc_pipen_lsttr(struct renesas_usb3 *usb3, int num) | |
1863 | { | |
1864 | struct renesas_usb3_ep *usb3_ep = usb3_get_ep(usb3, num); | |
1865 | struct renesas_usb3_request *usb3_req = usb3_get_request(usb3_ep); | |
1866 | ||
1867 | if (!usb3_req) | |
1868 | return; | |
1869 | ||
1870 | if (usb3_ep->dir_in) { | |
1871 | dev_dbg(usb3_to_dev(usb3), "%s: len = %u, actual = %u\n", | |
1872 | __func__, usb3_req->req.length, usb3_req->req.actual); | |
1873 | usb3_request_done_pipen(usb3, usb3_ep, usb3_req, 0); | |
1874 | } | |
1875 | } | |
1876 | ||
1877 | static void usb3_irq_epc_pipen_bfrdy(struct renesas_usb3 *usb3, int num) | |
1878 | { | |
1879 | struct renesas_usb3_ep *usb3_ep = usb3_get_ep(usb3, num); | |
1880 | struct renesas_usb3_request *usb3_req = usb3_get_request(usb3_ep); | |
940f538a | 1881 | bool done = false; |
746bfe63 YS |
1882 | |
1883 | if (!usb3_req) | |
1884 | return; | |
1885 | ||
940f538a YS |
1886 | spin_lock(&usb3->lock); |
1887 | if (usb3_pn_change(usb3, num)) | |
1888 | goto out; | |
1889 | ||
746bfe63 YS |
1890 | if (usb3_ep->dir_in) { |
1891 | /* Do not stop the IN pipe here to detect LSTTR interrupt */ | |
1892 | if (!usb3_write_pipe(usb3_ep, usb3_req, USB3_PN_WRITE)) | |
1893 | usb3_clear_bit(usb3, PN_INT_BFRDY, USB3_PN_INT_ENA); | |
1894 | } else { | |
1895 | if (!usb3_read_pipe(usb3_ep, usb3_req, USB3_PN_READ)) | |
940f538a | 1896 | done = true; |
746bfe63 | 1897 | } |
940f538a YS |
1898 | |
1899 | out: | |
1900 | /* need to unlock because usb3_request_done_pipen() locks it */ | |
1901 | spin_unlock(&usb3->lock); | |
1902 | ||
1903 | if (done) | |
1904 | usb3_request_done_pipen(usb3, usb3_ep, usb3_req, 0); | |
746bfe63 YS |
1905 | } |
1906 | ||
1907 | static void usb3_irq_epc_pipen(struct renesas_usb3 *usb3, int num) | |
1908 | { | |
1909 | u32 pn_int_sta; | |
1910 | ||
940f538a YS |
1911 | spin_lock(&usb3->lock); |
1912 | if (usb3_pn_change(usb3, num) < 0) { | |
1913 | spin_unlock(&usb3->lock); | |
746bfe63 | 1914 | return; |
940f538a | 1915 | } |
746bfe63 YS |
1916 | |
1917 | pn_int_sta = usb3_read(usb3, USB3_PN_INT_STA); | |
1918 | pn_int_sta &= usb3_read(usb3, USB3_PN_INT_ENA); | |
1919 | usb3_write(usb3, pn_int_sta, USB3_PN_INT_STA); | |
940f538a | 1920 | spin_unlock(&usb3->lock); |
746bfe63 YS |
1921 | if (pn_int_sta & PN_INT_LSTTR) |
1922 | usb3_irq_epc_pipen_lsttr(usb3, num); | |
1923 | if (pn_int_sta & PN_INT_BFRDY) | |
1924 | usb3_irq_epc_pipen_bfrdy(usb3, num); | |
1925 | } | |
1926 | ||
1927 | static void usb3_irq_epc_int_2(struct renesas_usb3 *usb3, u32 int_sta_2) | |
1928 | { | |
1929 | int i; | |
1930 | ||
1931 | for (i = 0; i < usb3->num_usb3_eps; i++) { | |
1932 | if (int_sta_2 & USB_INT_2_PIPE(i)) { | |
1933 | if (!i) | |
1934 | usb3_irq_epc_pipe0(usb3); | |
1935 | else | |
1936 | usb3_irq_epc_pipen(usb3, i); | |
1937 | } | |
1938 | } | |
1939 | } | |
1940 | ||
77172a1f YS |
1941 | static void usb3_irq_idmon_change(struct renesas_usb3 *usb3) |
1942 | { | |
1943 | usb3_check_id(usb3); | |
1944 | } | |
1945 | ||
1946 | static void usb3_irq_otg_int(struct renesas_usb3 *usb3, u32 otg_int_sta) | |
1947 | { | |
1948 | if (otg_int_sta & USB_OTG_IDMON) | |
1949 | usb3_irq_idmon_change(usb3); | |
1950 | } | |
1951 | ||
746bfe63 YS |
1952 | static void usb3_irq_epc(struct renesas_usb3 *usb3) |
1953 | { | |
1954 | u32 int_sta_1 = usb3_read(usb3, USB3_USB_INT_STA_1); | |
1955 | u32 int_sta_2 = usb3_read(usb3, USB3_USB_INT_STA_2); | |
77172a1f | 1956 | u32 otg_int_sta = usb3_read(usb3, USB3_USB_OTG_INT_STA); |
746bfe63 YS |
1957 | |
1958 | int_sta_1 &= usb3_read(usb3, USB3_USB_INT_ENA_1); | |
1959 | if (int_sta_1) { | |
1960 | usb3_write(usb3, int_sta_1, USB3_USB_INT_STA_1); | |
1961 | usb3_irq_epc_int_1(usb3, int_sta_1); | |
1962 | } | |
1963 | ||
1964 | int_sta_2 &= usb3_read(usb3, USB3_USB_INT_ENA_2); | |
1965 | if (int_sta_2) | |
1966 | usb3_irq_epc_int_2(usb3, int_sta_2); | |
77172a1f YS |
1967 | |
1968 | otg_int_sta &= usb3_read(usb3, USB3_USB_OTG_INT_ENA); | |
1969 | if (otg_int_sta) { | |
1970 | usb3_write(usb3, otg_int_sta, USB3_USB_OTG_INT_STA); | |
1971 | usb3_irq_otg_int(usb3, otg_int_sta); | |
1972 | } | |
746bfe63 YS |
1973 | } |
1974 | ||
2d4aa21a YS |
1975 | static void usb3_irq_dma_int(struct renesas_usb3 *usb3, u32 dma_sta) |
1976 | { | |
1977 | struct renesas_usb3_ep *usb3_ep; | |
1978 | struct renesas_usb3_request *usb3_req; | |
1979 | int i, status; | |
1980 | ||
1981 | for (i = 0; i < usb3->num_usb3_eps; i++) { | |
1982 | if (!(dma_sta & DMA_INT(i))) | |
1983 | continue; | |
1984 | ||
1985 | usb3_ep = usb3_get_ep(usb3, i); | |
1986 | if (!(usb3_read(usb3, USB3_AXI_INT_STA) & | |
1987 | AXI_INT_PRDEN_CLR_STA(usb3_ep->dma->num))) | |
1988 | continue; | |
1989 | ||
1990 | usb3_req = usb3_get_request(usb3_ep); | |
1991 | status = usb3_dma_try_stop(usb3_ep, usb3_req); | |
1992 | usb3_request_done_pipen(usb3, usb3_ep, usb3_req, status); | |
1993 | } | |
1994 | } | |
1995 | ||
1996 | static void usb3_irq_dma(struct renesas_usb3 *usb3) | |
1997 | { | |
1998 | u32 dma_sta = usb3_read(usb3, USB3_DMA_INT_STA); | |
1999 | ||
2000 | dma_sta &= usb3_read(usb3, USB3_DMA_INT_ENA); | |
2001 | if (dma_sta) { | |
2002 | usb3_write(usb3, dma_sta, USB3_DMA_INT_STA); | |
2003 | usb3_irq_dma_int(usb3, dma_sta); | |
2004 | } | |
2005 | } | |
2006 | ||
746bfe63 YS |
2007 | static irqreturn_t renesas_usb3_irq(int irq, void *_usb3) |
2008 | { | |
2009 | struct renesas_usb3 *usb3 = _usb3; | |
2010 | irqreturn_t ret = IRQ_NONE; | |
2011 | u32 axi_int_sta = usb3_read(usb3, USB3_AXI_INT_STA); | |
2012 | ||
2d4aa21a YS |
2013 | if (axi_int_sta & AXI_INT_DMAINT) { |
2014 | usb3_irq_dma(usb3); | |
2015 | ret = IRQ_HANDLED; | |
2016 | } | |
2017 | ||
746bfe63 YS |
2018 | if (axi_int_sta & AXI_INT_EPCINT) { |
2019 | usb3_irq_epc(usb3); | |
2020 | ret = IRQ_HANDLED; | |
2021 | } | |
2022 | ||
2023 | return ret; | |
2024 | } | |
2025 | ||
2026 | static void usb3_write_pn_mod(struct renesas_usb3_ep *usb3_ep, | |
2027 | const struct usb_endpoint_descriptor *desc) | |
2028 | { | |
2029 | struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep); | |
2030 | u32 val = 0; | |
2031 | ||
2032 | val |= usb3_ep->dir_in ? PN_MOD_DIR : 0; | |
2033 | val |= PN_MOD_TYPE(usb_endpoint_type(desc)); | |
2034 | val |= PN_MOD_EPNUM(usb_endpoint_num(desc)); | |
2035 | usb3_write(usb3, val, USB3_PN_MOD); | |
2036 | } | |
2037 | ||
2038 | static u32 usb3_calc_ramarea(int ram_size) | |
2039 | { | |
2040 | WARN_ON(ram_size > SZ_16K); | |
2041 | ||
2042 | if (ram_size <= SZ_1K) | |
2043 | return PN_RAMMAP_RAMAREA_1KB; | |
2044 | else if (ram_size <= SZ_2K) | |
2045 | return PN_RAMMAP_RAMAREA_2KB; | |
2046 | else if (ram_size <= SZ_4K) | |
2047 | return PN_RAMMAP_RAMAREA_4KB; | |
2048 | else if (ram_size <= SZ_8K) | |
2049 | return PN_RAMMAP_RAMAREA_8KB; | |
2050 | else | |
2051 | return PN_RAMMAP_RAMAREA_16KB; | |
2052 | } | |
2053 | ||
2054 | static u32 usb3_calc_rammap_val(struct renesas_usb3_ep *usb3_ep, | |
2055 | const struct usb_endpoint_descriptor *desc) | |
2056 | { | |
73f2f574 | 2057 | int i; |
8af620f0 | 2058 | static const u32 max_packet_array[] = {8, 16, 32, 64, 512}; |
73f2f574 YS |
2059 | u32 mpkt = PN_RAMMAP_MPKT(1024); |
2060 | ||
2061 | for (i = 0; i < ARRAY_SIZE(max_packet_array); i++) { | |
2062 | if (usb_endpoint_maxp(desc) <= max_packet_array[i]) | |
2063 | mpkt = PN_RAMMAP_MPKT(max_packet_array[i]); | |
2064 | } | |
2065 | ||
2066 | return usb3_ep->rammap_val | mpkt; | |
746bfe63 YS |
2067 | } |
2068 | ||
2069 | static int usb3_enable_pipe_n(struct renesas_usb3_ep *usb3_ep, | |
2070 | const struct usb_endpoint_descriptor *desc) | |
2071 | { | |
2072 | struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep); | |
2073 | unsigned long flags; | |
2074 | ||
2075 | usb3_ep->dir_in = usb_endpoint_dir_in(desc); | |
2076 | ||
2077 | spin_lock_irqsave(&usb3->lock, flags); | |
2078 | if (!usb3_pn_change(usb3, usb3_ep->num)) { | |
2079 | usb3_write_pn_mod(usb3_ep, desc); | |
2080 | usb3_write(usb3, usb3_calc_rammap_val(usb3_ep, desc), | |
2081 | USB3_PN_RAMMAP); | |
2082 | usb3_pn_con_clear(usb3); | |
2083 | usb3_set_bit(usb3, PN_CON_EN, USB3_PN_CON); | |
2084 | } | |
2085 | spin_unlock_irqrestore(&usb3->lock, flags); | |
2086 | ||
2087 | return 0; | |
2088 | } | |
2089 | ||
2090 | static int usb3_disable_pipe_n(struct renesas_usb3_ep *usb3_ep) | |
2091 | { | |
2092 | struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep); | |
2093 | unsigned long flags; | |
2094 | ||
2095 | usb3_ep->halt = false; | |
2096 | ||
2097 | spin_lock_irqsave(&usb3->lock, flags); | |
2098 | if (!usb3_pn_change(usb3, usb3_ep->num)) { | |
afbbc791 | 2099 | usb3_write(usb3, 0, USB3_PN_INT_ENA); |
746bfe63 YS |
2100 | usb3_write(usb3, 0, USB3_PN_RAMMAP); |
2101 | usb3_clear_bit(usb3, PN_CON_EN, USB3_PN_CON); | |
2102 | } | |
2103 | spin_unlock_irqrestore(&usb3->lock, flags); | |
2104 | ||
2105 | return 0; | |
2106 | } | |
2107 | ||
2108 | /*------- usb_ep_ops -----------------------------------------------------*/ | |
2109 | static int renesas_usb3_ep_enable(struct usb_ep *_ep, | |
2110 | const struct usb_endpoint_descriptor *desc) | |
2111 | { | |
2112 | struct renesas_usb3_ep *usb3_ep = usb_ep_to_usb3_ep(_ep); | |
2113 | ||
2114 | return usb3_enable_pipe_n(usb3_ep, desc); | |
2115 | } | |
2116 | ||
2117 | static int renesas_usb3_ep_disable(struct usb_ep *_ep) | |
2118 | { | |
2119 | struct renesas_usb3_ep *usb3_ep = usb_ep_to_usb3_ep(_ep); | |
2120 | struct renesas_usb3_request *usb3_req; | |
2121 | ||
2122 | do { | |
2123 | usb3_req = usb3_get_request(usb3_ep); | |
2124 | if (!usb3_req) | |
2125 | break; | |
2d4aa21a | 2126 | usb3_dma_try_stop(usb3_ep, usb3_req); |
746bfe63 YS |
2127 | usb3_request_done(usb3_ep, usb3_req, -ESHUTDOWN); |
2128 | } while (1); | |
2129 | ||
2130 | return usb3_disable_pipe_n(usb3_ep); | |
2131 | } | |
2132 | ||
2133 | static struct usb_request *__renesas_usb3_ep_alloc_request(gfp_t gfp_flags) | |
2134 | { | |
2135 | struct renesas_usb3_request *usb3_req; | |
2136 | ||
2137 | usb3_req = kzalloc(sizeof(struct renesas_usb3_request), gfp_flags); | |
2138 | if (!usb3_req) | |
2139 | return NULL; | |
2140 | ||
2141 | INIT_LIST_HEAD(&usb3_req->queue); | |
2142 | ||
2143 | return &usb3_req->req; | |
2144 | } | |
2145 | ||
2146 | static void __renesas_usb3_ep_free_request(struct usb_request *_req) | |
2147 | { | |
2148 | struct renesas_usb3_request *usb3_req = usb_req_to_usb3_req(_req); | |
2149 | ||
2150 | kfree(usb3_req); | |
2151 | } | |
2152 | ||
2153 | static struct usb_request *renesas_usb3_ep_alloc_request(struct usb_ep *_ep, | |
2154 | gfp_t gfp_flags) | |
2155 | { | |
2156 | return __renesas_usb3_ep_alloc_request(gfp_flags); | |
2157 | } | |
2158 | ||
2159 | static void renesas_usb3_ep_free_request(struct usb_ep *_ep, | |
2160 | struct usb_request *_req) | |
2161 | { | |
2162 | __renesas_usb3_ep_free_request(_req); | |
2163 | } | |
2164 | ||
2165 | static int renesas_usb3_ep_dequeue(struct usb_ep *_ep, struct usb_request *_req) | |
2166 | { | |
2167 | struct renesas_usb3_ep *usb3_ep = usb_ep_to_usb3_ep(_ep); | |
2168 | struct renesas_usb3_request *usb3_req = usb_req_to_usb3_req(_req); | |
2169 | struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep); | |
2170 | ||
2171 | dev_dbg(usb3_to_dev(usb3), "ep_dequeue: ep%2d, %u\n", usb3_ep->num, | |
2172 | _req->length); | |
2173 | ||
2d4aa21a | 2174 | usb3_dma_try_stop(usb3_ep, usb3_req); |
746bfe63 YS |
2175 | usb3_request_done_pipen(usb3, usb3_ep, usb3_req, -ECONNRESET); |
2176 | ||
2177 | return 0; | |
2178 | } | |
2179 | ||
2180 | static int renesas_usb3_ep_set_halt(struct usb_ep *_ep, int value) | |
2181 | { | |
2182 | return usb3_set_halt(usb_ep_to_usb3_ep(_ep), !!value, false); | |
2183 | } | |
2184 | ||
2185 | static int renesas_usb3_ep_set_wedge(struct usb_ep *_ep) | |
2186 | { | |
2187 | struct renesas_usb3_ep *usb3_ep = usb_ep_to_usb3_ep(_ep); | |
2188 | ||
2189 | usb3_ep->wedge = true; | |
2190 | return usb3_set_halt(usb3_ep, true, false); | |
2191 | } | |
2192 | ||
2193 | static void renesas_usb3_ep_fifo_flush(struct usb_ep *_ep) | |
2194 | { | |
2195 | struct renesas_usb3_ep *usb3_ep = usb_ep_to_usb3_ep(_ep); | |
2196 | struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep); | |
2197 | unsigned long flags; | |
2198 | ||
2199 | if (usb3_ep->num) { | |
2200 | spin_lock_irqsave(&usb3->lock, flags); | |
2201 | if (!usb3_pn_change(usb3, usb3_ep->num)) { | |
2202 | usb3_pn_con_clear(usb3); | |
2203 | usb3_set_bit(usb3, PN_CON_EN, USB3_PN_CON); | |
2204 | } | |
2205 | spin_unlock_irqrestore(&usb3->lock, flags); | |
2206 | } else { | |
2207 | usb3_p0_con_clear_buffer(usb3); | |
2208 | } | |
2209 | } | |
2210 | ||
64b59f11 | 2211 | static const struct usb_ep_ops renesas_usb3_ep_ops = { |
746bfe63 YS |
2212 | .enable = renesas_usb3_ep_enable, |
2213 | .disable = renesas_usb3_ep_disable, | |
2214 | ||
2215 | .alloc_request = renesas_usb3_ep_alloc_request, | |
2216 | .free_request = renesas_usb3_ep_free_request, | |
2217 | ||
2218 | .queue = renesas_usb3_ep_queue, | |
2219 | .dequeue = renesas_usb3_ep_dequeue, | |
2220 | ||
2221 | .set_halt = renesas_usb3_ep_set_halt, | |
2222 | .set_wedge = renesas_usb3_ep_set_wedge, | |
2223 | .fifo_flush = renesas_usb3_ep_fifo_flush, | |
2224 | }; | |
2225 | ||
2226 | /*------- usb_gadget_ops -------------------------------------------------*/ | |
2227 | static int renesas_usb3_start(struct usb_gadget *gadget, | |
2228 | struct usb_gadget_driver *driver) | |
2229 | { | |
2230 | struct renesas_usb3 *usb3; | |
2231 | ||
2232 | if (!driver || driver->max_speed < USB_SPEED_FULL || | |
2233 | !driver->setup) | |
2234 | return -EINVAL; | |
2235 | ||
2236 | usb3 = gadget_to_renesas_usb3(gadget); | |
2237 | ||
2238 | /* hook up the driver */ | |
2239 | usb3->driver = driver; | |
2240 | ||
279d4bc6 YS |
2241 | if (usb3->phy) |
2242 | phy_init(usb3->phy); | |
2243 | ||
cdc87687 YS |
2244 | pm_runtime_get_sync(usb3_to_dev(usb3)); |
2245 | ||
746bfe63 YS |
2246 | renesas_usb3_init_controller(usb3); |
2247 | ||
2248 | return 0; | |
2249 | } | |
2250 | ||
2251 | static int renesas_usb3_stop(struct usb_gadget *gadget) | |
2252 | { | |
2253 | struct renesas_usb3 *usb3 = gadget_to_renesas_usb3(gadget); | |
746bfe63 | 2254 | |
746bfe63 YS |
2255 | usb3->softconnect = false; |
2256 | usb3->gadget.speed = USB_SPEED_UNKNOWN; | |
2257 | usb3->driver = NULL; | |
2258 | renesas_usb3_stop_controller(usb3); | |
746bfe63 | 2259 | |
279d4bc6 YS |
2260 | if (usb3->phy) |
2261 | phy_exit(usb3->phy); | |
2262 | ||
cdc87687 | 2263 | pm_runtime_put(usb3_to_dev(usb3)); |
cdc87687 | 2264 | |
746bfe63 YS |
2265 | return 0; |
2266 | } | |
2267 | ||
2268 | static int renesas_usb3_get_frame(struct usb_gadget *_gadget) | |
2269 | { | |
2270 | return -EOPNOTSUPP; | |
2271 | } | |
2272 | ||
2273 | static int renesas_usb3_pullup(struct usb_gadget *gadget, int is_on) | |
2274 | { | |
2275 | struct renesas_usb3 *usb3 = gadget_to_renesas_usb3(gadget); | |
2276 | ||
2277 | usb3->softconnect = !!is_on; | |
2278 | ||
2279 | return 0; | |
2280 | } | |
2281 | ||
2282 | static int renesas_usb3_set_selfpowered(struct usb_gadget *gadget, int is_self) | |
2283 | { | |
2284 | gadget->is_selfpowered = !!is_self; | |
2285 | ||
2286 | return 0; | |
2287 | } | |
2288 | ||
2289 | static const struct usb_gadget_ops renesas_usb3_gadget_ops = { | |
2290 | .get_frame = renesas_usb3_get_frame, | |
2291 | .udc_start = renesas_usb3_start, | |
2292 | .udc_stop = renesas_usb3_stop, | |
2293 | .pullup = renesas_usb3_pullup, | |
2294 | .set_selfpowered = renesas_usb3_set_selfpowered, | |
2295 | }; | |
2296 | ||
cc995c9e YS |
2297 | static ssize_t role_store(struct device *dev, struct device_attribute *attr, |
2298 | const char *buf, size_t count) | |
2299 | { | |
2300 | struct renesas_usb3 *usb3 = dev_get_drvdata(dev); | |
2301 | bool new_mode_is_host; | |
2302 | ||
2303 | if (!usb3->driver) | |
2304 | return -ENODEV; | |
2305 | ||
43ba968b YS |
2306 | if (usb3->forced_b_device) |
2307 | return -EBUSY; | |
2308 | ||
cc995c9e YS |
2309 | if (!strncmp(buf, "host", strlen("host"))) |
2310 | new_mode_is_host = true; | |
2311 | else if (!strncmp(buf, "peripheral", strlen("peripheral"))) | |
2312 | new_mode_is_host = false; | |
2313 | else | |
2314 | return -EINVAL; | |
2315 | ||
2316 | if (new_mode_is_host == usb3_is_host(usb3)) | |
2317 | return -EINVAL; | |
2318 | ||
2319 | usb3_mode_config(usb3, new_mode_is_host, usb3_is_a_device(usb3)); | |
2320 | ||
2321 | return count; | |
2322 | } | |
2323 | ||
2324 | static ssize_t role_show(struct device *dev, struct device_attribute *attr, | |
2325 | char *buf) | |
2326 | { | |
2327 | struct renesas_usb3 *usb3 = dev_get_drvdata(dev); | |
2328 | ||
2329 | if (!usb3->driver) | |
2330 | return -ENODEV; | |
2331 | ||
2332 | return sprintf(buf, "%s\n", usb3_is_host(usb3) ? "host" : "peripheral"); | |
2333 | } | |
2334 | static DEVICE_ATTR_RW(role); | |
2335 | ||
43ba968b YS |
2336 | static int renesas_usb3_b_device_show(struct seq_file *s, void *unused) |
2337 | { | |
2338 | struct renesas_usb3 *usb3 = s->private; | |
2339 | ||
2340 | seq_printf(s, "%d\n", usb3->forced_b_device); | |
2341 | ||
2342 | return 0; | |
2343 | } | |
2344 | ||
2345 | static int renesas_usb3_b_device_open(struct inode *inode, struct file *file) | |
2346 | { | |
2347 | return single_open(file, renesas_usb3_b_device_show, inode->i_private); | |
2348 | } | |
2349 | ||
2350 | static ssize_t renesas_usb3_b_device_write(struct file *file, | |
2351 | const char __user *ubuf, | |
2352 | size_t count, loff_t *ppos) | |
2353 | { | |
2354 | struct seq_file *s = file->private_data; | |
2355 | struct renesas_usb3 *usb3 = s->private; | |
2356 | char buf[32]; | |
2357 | ||
2358 | if (!usb3->driver) | |
2359 | return -ENODEV; | |
2360 | ||
2361 | if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count))) | |
2362 | return -EFAULT; | |
2363 | ||
2364 | if (!strncmp(buf, "1", 1)) | |
2365 | usb3->forced_b_device = true; | |
2366 | else | |
2367 | usb3->forced_b_device = false; | |
2368 | ||
2369 | /* Let this driver call usb3_connect() anyway */ | |
2370 | usb3_check_id(usb3); | |
2371 | ||
2372 | return count; | |
2373 | } | |
2374 | ||
2375 | static const struct file_operations renesas_usb3_b_device_fops = { | |
2376 | .open = renesas_usb3_b_device_open, | |
2377 | .write = renesas_usb3_b_device_write, | |
2378 | .read = seq_read, | |
2379 | .llseek = seq_lseek, | |
2380 | .release = single_release, | |
2381 | }; | |
2382 | ||
2383 | static void renesas_usb3_debugfs_init(struct renesas_usb3 *usb3, | |
2384 | struct device *dev) | |
2385 | { | |
2386 | struct dentry *root, *file; | |
2387 | ||
2388 | root = debugfs_create_dir(dev_name(dev), NULL); | |
2389 | if (IS_ERR_OR_NULL(root)) { | |
2390 | dev_info(dev, "%s: Can't create the root\n", __func__); | |
2391 | return; | |
2392 | } | |
2393 | ||
2394 | file = debugfs_create_file("b_device", 0644, root, usb3, | |
2395 | &renesas_usb3_b_device_fops); | |
2396 | if (!file) | |
2397 | dev_info(dev, "%s: Can't create debugfs mode\n", __func__); | |
2398 | } | |
2399 | ||
746bfe63 YS |
2400 | /*------- platform_driver ------------------------------------------------*/ |
2401 | static int renesas_usb3_remove(struct platform_device *pdev) | |
2402 | { | |
2403 | struct renesas_usb3 *usb3 = platform_get_drvdata(pdev); | |
2404 | ||
cc995c9e YS |
2405 | device_remove_file(&pdev->dev, &dev_attr_role); |
2406 | ||
746bfe63 | 2407 | usb_del_gadget_udc(&usb3->gadget); |
2d4aa21a | 2408 | renesas_usb3_dma_free_prd(usb3, &pdev->dev); |
746bfe63 YS |
2409 | |
2410 | __renesas_usb3_ep_free_request(usb3->ep0_req); | |
279d4bc6 YS |
2411 | if (usb3->phy) |
2412 | phy_put(usb3->phy); | |
cf06df3f | 2413 | pm_runtime_disable(usb3_to_dev(usb3)); |
746bfe63 YS |
2414 | |
2415 | return 0; | |
2416 | } | |
2417 | ||
2418 | static int renesas_usb3_init_ep(struct renesas_usb3 *usb3, struct device *dev, | |
2419 | const struct renesas_usb3_priv *priv) | |
2420 | { | |
2421 | struct renesas_usb3_ep *usb3_ep; | |
2422 | int i; | |
2423 | ||
2424 | /* calculate num_usb3_eps from renesas_usb3_priv */ | |
2425 | usb3->num_usb3_eps = priv->ramsize_per_ramif * priv->num_ramif * 2 / | |
2426 | priv->ramsize_per_pipe + 1; | |
2427 | ||
2428 | if (usb3->num_usb3_eps > USB3_MAX_NUM_PIPES) | |
2429 | usb3->num_usb3_eps = USB3_MAX_NUM_PIPES; | |
2430 | ||
2431 | usb3->usb3_ep = devm_kzalloc(dev, sizeof(*usb3_ep) * usb3->num_usb3_eps, | |
2432 | GFP_KERNEL); | |
2433 | if (!usb3->usb3_ep) | |
2434 | return -ENOMEM; | |
2435 | ||
2436 | dev_dbg(dev, "%s: num_usb3_eps = %d\n", __func__, usb3->num_usb3_eps); | |
2437 | /* | |
4091fb95 | 2438 | * This driver prepares pipes as follows: |
746bfe63 YS |
2439 | * - odd pipes = IN pipe |
2440 | * - even pipes = OUT pipe (except pipe 0) | |
2441 | */ | |
2442 | usb3_for_each_ep(usb3_ep, usb3, i) { | |
2443 | snprintf(usb3_ep->ep_name, sizeof(usb3_ep->ep_name), "ep%d", i); | |
2444 | usb3_ep->usb3 = usb3; | |
2445 | usb3_ep->num = i; | |
2446 | usb3_ep->ep.name = usb3_ep->ep_name; | |
2447 | usb3_ep->ep.ops = &renesas_usb3_ep_ops; | |
2448 | INIT_LIST_HEAD(&usb3_ep->queue); | |
2449 | INIT_LIST_HEAD(&usb3_ep->ep.ep_list); | |
2450 | if (!i) { | |
2451 | /* for control pipe */ | |
2452 | usb3->gadget.ep0 = &usb3_ep->ep; | |
2453 | usb_ep_set_maxpacket_limit(&usb3_ep->ep, | |
2454 | USB3_EP0_HSFS_MAX_PACKET_SIZE); | |
2455 | usb3_ep->ep.caps.type_control = true; | |
2456 | usb3_ep->ep.caps.dir_in = true; | |
2457 | usb3_ep->ep.caps.dir_out = true; | |
2458 | continue; | |
2459 | } | |
2460 | ||
2461 | /* for bulk or interrupt pipe */ | |
2462 | usb_ep_set_maxpacket_limit(&usb3_ep->ep, ~0); | |
2463 | list_add_tail(&usb3_ep->ep.ep_list, &usb3->gadget.ep_list); | |
2464 | usb3_ep->ep.caps.type_bulk = true; | |
2465 | usb3_ep->ep.caps.type_int = true; | |
2466 | if (i & 1) | |
2467 | usb3_ep->ep.caps.dir_in = true; | |
2468 | else | |
2469 | usb3_ep->ep.caps.dir_out = true; | |
2470 | } | |
2471 | ||
2472 | return 0; | |
2473 | } | |
2474 | ||
2475 | static void renesas_usb3_init_ram(struct renesas_usb3 *usb3, struct device *dev, | |
2476 | const struct renesas_usb3_priv *priv) | |
2477 | { | |
2478 | struct renesas_usb3_ep *usb3_ep; | |
2479 | int i; | |
2480 | u32 ramif[2], basead[2]; /* index 0 = for IN pipes */ | |
2481 | u32 *cur_ramif, *cur_basead; | |
2482 | u32 val; | |
2483 | ||
2484 | memset(ramif, 0, sizeof(ramif)); | |
2485 | memset(basead, 0, sizeof(basead)); | |
2486 | ||
2487 | /* | |
4091fb95 | 2488 | * This driver prepares pipes as follows: |
746bfe63 YS |
2489 | * - all pipes = the same size as "ramsize_per_pipe" |
2490 | * Please refer to the "Method of Specifying RAM Mapping" | |
2491 | */ | |
2492 | usb3_for_each_ep(usb3_ep, usb3, i) { | |
2493 | if (!i) | |
2494 | continue; /* out of scope if ep num = 0 */ | |
2495 | if (usb3_ep->ep.caps.dir_in) { | |
2496 | cur_ramif = &ramif[0]; | |
2497 | cur_basead = &basead[0]; | |
2498 | } else { | |
2499 | cur_ramif = &ramif[1]; | |
2500 | cur_basead = &basead[1]; | |
2501 | } | |
2502 | ||
2503 | if (*cur_basead > priv->ramsize_per_ramif) | |
2504 | continue; /* out of memory for IN or OUT pipe */ | |
2505 | ||
2506 | /* calculate rammap_val */ | |
2507 | val = PN_RAMMAP_RAMIF(*cur_ramif); | |
2508 | val |= usb3_calc_ramarea(priv->ramsize_per_pipe); | |
2509 | val |= PN_RAMMAP_BASEAD(*cur_basead); | |
2510 | usb3_ep->rammap_val = val; | |
2511 | ||
2512 | dev_dbg(dev, "ep%2d: val = %08x, ramif = %d, base = %x\n", | |
2513 | i, val, *cur_ramif, *cur_basead); | |
2514 | ||
2515 | /* update current ramif */ | |
2516 | if (*cur_ramif + 1 == priv->num_ramif) { | |
2517 | *cur_ramif = 0; | |
2518 | *cur_basead += priv->ramsize_per_pipe; | |
2519 | } else { | |
2520 | (*cur_ramif)++; | |
2521 | } | |
2522 | } | |
2523 | } | |
2524 | ||
974203c0 | 2525 | static const struct renesas_usb3_priv renesas_usb3_priv_r8a7795_es1 = { |
746bfe63 YS |
2526 | .ramsize_per_ramif = SZ_16K, |
2527 | .num_ramif = 2, | |
2528 | .ramsize_per_pipe = SZ_4K, | |
2529 | .workaround_for_vbus = true, | |
2530 | }; | |
2531 | ||
974203c0 YS |
2532 | static const struct renesas_usb3_priv renesas_usb3_priv_gen3 = { |
2533 | .ramsize_per_ramif = SZ_16K, | |
2534 | .num_ramif = 4, | |
2535 | .ramsize_per_pipe = SZ_4K, | |
2536 | }; | |
2537 | ||
746bfe63 YS |
2538 | static const struct of_device_id usb3_of_match[] = { |
2539 | { | |
2540 | .compatible = "renesas,r8a7795-usb3-peri", | |
974203c0 | 2541 | .data = &renesas_usb3_priv_gen3, |
746bfe63 | 2542 | }, |
b744a2e0 YS |
2543 | { |
2544 | .compatible = "renesas,rcar-gen3-usb3-peri", | |
2545 | .data = &renesas_usb3_priv_gen3, | |
746bfe63 YS |
2546 | }, |
2547 | { }, | |
2548 | }; | |
2549 | MODULE_DEVICE_TABLE(of, usb3_of_match); | |
2550 | ||
974203c0 YS |
2551 | static const struct soc_device_attribute renesas_usb3_quirks_match[] = { |
2552 | { | |
2553 | .soc_id = "r8a7795", .revision = "ES1.*", | |
2554 | .data = &renesas_usb3_priv_r8a7795_es1, | |
2555 | }, | |
2556 | { /* sentinel */ }, | |
2557 | }; | |
2558 | ||
3b68e7ca YS |
2559 | static const unsigned int renesas_usb3_cable[] = { |
2560 | EXTCON_USB, | |
2561 | EXTCON_USB_HOST, | |
2562 | EXTCON_NONE, | |
2563 | }; | |
2564 | ||
746bfe63 YS |
2565 | static int renesas_usb3_probe(struct platform_device *pdev) |
2566 | { | |
2567 | struct renesas_usb3 *usb3; | |
2568 | struct resource *res; | |
746bfe63 YS |
2569 | int irq, ret; |
2570 | const struct renesas_usb3_priv *priv; | |
974203c0 | 2571 | const struct soc_device_attribute *attr; |
746bfe63 | 2572 | |
974203c0 YS |
2573 | attr = soc_device_match(renesas_usb3_quirks_match); |
2574 | if (attr) | |
2575 | priv = attr->data; | |
2576 | else | |
ca02a5af | 2577 | priv = of_device_get_match_data(&pdev->dev); |
746bfe63 YS |
2578 | |
2579 | irq = platform_get_irq(pdev, 0); | |
8e374f0a GS |
2580 | if (irq < 0) { |
2581 | dev_err(&pdev->dev, "Failed to get IRQ: %d\n", irq); | |
2582 | return irq; | |
2583 | } | |
746bfe63 YS |
2584 | |
2585 | usb3 = devm_kzalloc(&pdev->dev, sizeof(*usb3), GFP_KERNEL); | |
2586 | if (!usb3) | |
2587 | return -ENOMEM; | |
2588 | ||
2589 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
2590 | usb3->reg = devm_ioremap_resource(&pdev->dev, res); | |
2591 | if (IS_ERR(usb3->reg)) | |
2592 | return PTR_ERR(usb3->reg); | |
2593 | ||
2594 | platform_set_drvdata(pdev, usb3); | |
2595 | spin_lock_init(&usb3->lock); | |
2596 | ||
2597 | usb3->gadget.ops = &renesas_usb3_gadget_ops; | |
2598 | usb3->gadget.name = udc_name; | |
2599 | usb3->gadget.max_speed = USB_SPEED_SUPER; | |
2600 | INIT_LIST_HEAD(&usb3->gadget.ep_list); | |
2601 | ret = renesas_usb3_init_ep(usb3, &pdev->dev, priv); | |
2602 | if (ret < 0) | |
2603 | return ret; | |
2604 | renesas_usb3_init_ram(usb3, &pdev->dev, priv); | |
2605 | ||
2606 | ret = devm_request_irq(&pdev->dev, irq, renesas_usb3_irq, 0, | |
2607 | dev_name(&pdev->dev), usb3); | |
2608 | if (ret < 0) | |
2609 | return ret; | |
2610 | ||
3b68e7ca YS |
2611 | INIT_WORK(&usb3->extcon_work, renesas_usb3_extcon_work); |
2612 | usb3->extcon = devm_extcon_dev_allocate(&pdev->dev, renesas_usb3_cable); | |
2613 | if (IS_ERR(usb3->extcon)) | |
2614 | return PTR_ERR(usb3->extcon); | |
2615 | ||
2616 | ret = devm_extcon_dev_register(&pdev->dev, usb3->extcon); | |
2617 | if (ret < 0) { | |
2618 | dev_err(&pdev->dev, "Failed to register extcon\n"); | |
2619 | return ret; | |
2620 | } | |
2621 | ||
746bfe63 YS |
2622 | /* for ep0 handling */ |
2623 | usb3->ep0_req = __renesas_usb3_ep_alloc_request(GFP_KERNEL); | |
2624 | if (!usb3->ep0_req) | |
2625 | return -ENOMEM; | |
2626 | ||
2d4aa21a YS |
2627 | ret = renesas_usb3_dma_alloc_prd(usb3, &pdev->dev); |
2628 | if (ret < 0) | |
2629 | goto err_alloc_prd; | |
2630 | ||
746bfe63 YS |
2631 | ret = usb_add_gadget_udc(&pdev->dev, &usb3->gadget); |
2632 | if (ret < 0) | |
2633 | goto err_add_udc; | |
2634 | ||
cc995c9e YS |
2635 | ret = device_create_file(&pdev->dev, &dev_attr_role); |
2636 | if (ret < 0) | |
2637 | goto err_dev_create; | |
2638 | ||
279d4bc6 YS |
2639 | /* |
2640 | * This is an optional. So, if this driver cannot get a phy, | |
2641 | * this driver will not handle a phy anymore. | |
2642 | */ | |
2643 | usb3->phy = devm_phy_get(&pdev->dev, "usb"); | |
2644 | if (IS_ERR(usb3->phy)) | |
2645 | usb3->phy = NULL; | |
2646 | ||
746bfe63 YS |
2647 | usb3->workaround_for_vbus = priv->workaround_for_vbus; |
2648 | ||
43ba968b YS |
2649 | renesas_usb3_debugfs_init(usb3, &pdev->dev); |
2650 | ||
279d4bc6 | 2651 | dev_info(&pdev->dev, "probed%s\n", usb3->phy ? " with phy" : ""); |
cf06df3f | 2652 | pm_runtime_enable(usb3_to_dev(usb3)); |
746bfe63 YS |
2653 | |
2654 | return 0; | |
2655 | ||
cc995c9e YS |
2656 | err_dev_create: |
2657 | usb_del_gadget_udc(&usb3->gadget); | |
2658 | ||
746bfe63 | 2659 | err_add_udc: |
2d4aa21a YS |
2660 | renesas_usb3_dma_free_prd(usb3, &pdev->dev); |
2661 | ||
2662 | err_alloc_prd: | |
746bfe63 YS |
2663 | __renesas_usb3_ep_free_request(usb3->ep0_req); |
2664 | ||
2665 | return ret; | |
2666 | } | |
2667 | ||
90d58864 YS |
2668 | #ifdef CONFIG_PM_SLEEP |
2669 | static int renesas_usb3_suspend(struct device *dev) | |
2670 | { | |
2671 | struct renesas_usb3 *usb3 = dev_get_drvdata(dev); | |
2672 | ||
2673 | /* Not started */ | |
2674 | if (!usb3->driver) | |
2675 | return 0; | |
2676 | ||
2677 | renesas_usb3_stop_controller(usb3); | |
279d4bc6 YS |
2678 | if (usb3->phy) |
2679 | phy_exit(usb3->phy); | |
90d58864 YS |
2680 | pm_runtime_put(dev); |
2681 | ||
2682 | return 0; | |
2683 | } | |
2684 | ||
2685 | static int renesas_usb3_resume(struct device *dev) | |
2686 | { | |
2687 | struct renesas_usb3 *usb3 = dev_get_drvdata(dev); | |
2688 | ||
2689 | /* Not started */ | |
2690 | if (!usb3->driver) | |
2691 | return 0; | |
2692 | ||
279d4bc6 YS |
2693 | if (usb3->phy) |
2694 | phy_init(usb3->phy); | |
90d58864 YS |
2695 | pm_runtime_get_sync(dev); |
2696 | renesas_usb3_init_controller(usb3); | |
2697 | ||
2698 | return 0; | |
2699 | } | |
2700 | #endif | |
2701 | ||
2702 | static SIMPLE_DEV_PM_OPS(renesas_usb3_pm_ops, renesas_usb3_suspend, | |
2703 | renesas_usb3_resume); | |
2704 | ||
746bfe63 YS |
2705 | static struct platform_driver renesas_usb3_driver = { |
2706 | .probe = renesas_usb3_probe, | |
2707 | .remove = renesas_usb3_remove, | |
2708 | .driver = { | |
2709 | .name = (char *)udc_name, | |
90d58864 | 2710 | .pm = &renesas_usb3_pm_ops, |
746bfe63 YS |
2711 | .of_match_table = of_match_ptr(usb3_of_match), |
2712 | }, | |
2713 | }; | |
2714 | module_platform_driver(renesas_usb3_driver); | |
2715 | ||
2716 | MODULE_DESCRIPTION("Renesas USB3.0 Peripheral driver"); | |
2717 | MODULE_LICENSE("GPL v2"); | |
2718 | MODULE_AUTHOR("Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>"); | |
2719 | MODULE_ALIAS("platform:renesas_usb3"); |