1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * mtu3.h - MediaTek USB3 DRD header 4 * 5 * Copyright (C) 2016 MediaTek Inc. 6 * 7 * Author: Chunfeng Yun <chunfeng.yun@mediatek.com> 8 */ 9 10 #ifndef __MTU3_H__ 11 #define __MTU3_H__ 12 13 #include <linux/device.h> 14 #include <linux/dmapool.h> 15 #include <linux/extcon.h> 16 #include <linux/interrupt.h> 17 #include <linux/list.h> 18 #include <linux/phy/phy.h> 19 #include <linux/regulator/consumer.h> 20 #include <linux/usb.h> 21 #include <linux/usb/ch9.h> 22 #include <linux/usb/gadget.h> 23 #include <linux/usb/otg.h> 24 25 struct mtu3; 26 struct mtu3_ep; 27 struct mtu3_request; 28 29 #include "mtu3_hw_regs.h" 30 #include "mtu3_qmu.h" 31 32 #define MU3D_EP_TXCR0(epnum) (U3D_TX1CSR0 + (((epnum) - 1) * 0x10)) 33 #define MU3D_EP_TXCR1(epnum) (U3D_TX1CSR1 + (((epnum) - 1) * 0x10)) 34 #define MU3D_EP_TXCR2(epnum) (U3D_TX1CSR2 + (((epnum) - 1) * 0x10)) 35 36 #define MU3D_EP_RXCR0(epnum) (U3D_RX1CSR0 + (((epnum) - 1) * 0x10)) 37 #define MU3D_EP_RXCR1(epnum) (U3D_RX1CSR1 + (((epnum) - 1) * 0x10)) 38 #define MU3D_EP_RXCR2(epnum) (U3D_RX1CSR2 + (((epnum) - 1) * 0x10)) 39 40 #define USB_QMU_TQHIAR(epnum) (U3D_TXQHIAR1 + (((epnum) - 1) * 0x4)) 41 #define USB_QMU_RQHIAR(epnum) (U3D_RXQHIAR1 + (((epnum) - 1) * 0x4)) 42 43 #define USB_QMU_RQCSR(epnum) (U3D_RXQCSR1 + (((epnum) - 1) * 0x10)) 44 #define USB_QMU_RQSAR(epnum) (U3D_RXQSAR1 + (((epnum) - 1) * 0x10)) 45 #define USB_QMU_RQCPR(epnum) (U3D_RXQCPR1 + (((epnum) - 1) * 0x10)) 46 47 #define USB_QMU_TQCSR(epnum) (U3D_TXQCSR1 + (((epnum) - 1) * 0x10)) 48 #define USB_QMU_TQSAR(epnum) (U3D_TXQSAR1 + (((epnum) - 1) * 0x10)) 49 #define USB_QMU_TQCPR(epnum) (U3D_TXQCPR1 + (((epnum) - 1) * 0x10)) 50 51 #define SSUSB_U3_CTRL(p) (U3D_SSUSB_U3_CTRL_0P + ((p) * 0x08)) 52 #define SSUSB_U2_CTRL(p) (U3D_SSUSB_U2_CTRL_0P + ((p) * 0x08)) 53 54 #define MTU3_DRIVER_NAME "mtu3" 55 #define DMA_ADDR_INVALID (~(dma_addr_t)0) 56 57 #define MTU3_EP_ENABLED BIT(0) 58 #define MTU3_EP_STALL BIT(1) 59 #define MTU3_EP_WEDGE BIT(2) 60 #define MTU3_EP_BUSY BIT(3) 61 62 #define MTU3_U3_IP_SLOT_DEFAULT 2 63 #define MTU3_U2_IP_SLOT_DEFAULT 1 64 65 /** 66 * IP TRUNK version 67 * from 0x1003 version, USB3 Gen2 is supported, two changes affect driver: 68 * 1. MAXPKT and MULTI bits layout of TXCSR1 and RXCSR1 are adjusted, 69 * but not backward compatible 70 * 2. QMU extend buffer length supported 71 */ 72 #define MTU3_TRUNK_VERS_1003 0x1003 73 74 /** 75 * Normally the device works on HS or SS, to simplify fifo management, 76 * devide fifo into some 512B parts, use bitmap to manage it; And 77 * 128 bits size of bitmap is large enough, that means it can manage 78 * up to 64KB fifo size. 79 * NOTE: MTU3_EP_FIFO_UNIT should be power of two 80 */ 81 #define MTU3_EP_FIFO_UNIT (1 << 9) 82 #define MTU3_FIFO_BIT_SIZE 128 83 #define MTU3_U2_IP_EP0_FIFO_SIZE 64 84 85 /** 86 * Maximum size of ep0 response buffer for ch9 requests, 87 * the SET_SEL request uses 6 so far, and GET_STATUS is 2 88 */ 89 #define EP0_RESPONSE_BUF 6 90 91 /* device operated link and speed got from DEVICE_CONF register */ 92 enum mtu3_speed { 93 MTU3_SPEED_INACTIVE = 0, 94 MTU3_SPEED_FULL = 1, 95 MTU3_SPEED_HIGH = 3, 96 MTU3_SPEED_SUPER = 4, 97 MTU3_SPEED_SUPER_PLUS = 5, 98 }; 99 100 /** 101 * @MU3D_EP0_STATE_SETUP: waits for SETUP or received a SETUP 102 * without data stage. 103 * @MU3D_EP0_STATE_TX: IN data stage 104 * @MU3D_EP0_STATE_RX: OUT data stage 105 * @MU3D_EP0_STATE_TX_END: the last IN data is transferred, and 106 * waits for its completion interrupt 107 * @MU3D_EP0_STATE_STALL: ep0 is in stall status, will be auto-cleared 108 * after receives a SETUP. 109 */ 110 enum mtu3_g_ep0_state { 111 MU3D_EP0_STATE_SETUP = 1, 112 MU3D_EP0_STATE_TX, 113 MU3D_EP0_STATE_RX, 114 MU3D_EP0_STATE_TX_END, 115 MU3D_EP0_STATE_STALL, 116 }; 117 118 /** 119 * MTU3_DR_FORCE_NONE: automatically switch host and periperal mode 120 * by IDPIN signal. 121 * MTU3_DR_FORCE_HOST: force to enter host mode and override OTG 122 * IDPIN signal. 123 * MTU3_DR_FORCE_DEVICE: force to enter peripheral mode. 124 */ 125 enum mtu3_dr_force_mode { 126 MTU3_DR_FORCE_NONE = 0, 127 MTU3_DR_FORCE_HOST, 128 MTU3_DR_FORCE_DEVICE, 129 }; 130 131 /** 132 * @base: the base address of fifo 133 * @limit: the bitmap size in bits 134 * @bitmap: fifo bitmap in unit of @MTU3_EP_FIFO_UNIT 135 */ 136 struct mtu3_fifo_info { 137 u32 base; 138 u32 limit; 139 DECLARE_BITMAP(bitmap, MTU3_FIFO_BIT_SIZE); 140 }; 141 142 /** 143 * General Purpose Descriptor (GPD): 144 * The format of TX GPD is a little different from RX one. 145 * And the size of GPD is 16 bytes. 146 * 147 * @dw0_info: 148 * bit0: Hardware Own (HWO) 149 * bit1: Buffer Descriptor Present (BDP), always 0, BD is not supported 150 * bit2: Bypass (BPS), 1: HW skips this GPD if HWO = 1 151 * bit6: [EL] Zero Length Packet (ZLP), moved from @dw3_info[29] 152 * bit7: Interrupt On Completion (IOC) 153 * bit[31:16]: ([EL] bit[31:12]) allow data buffer length (RX ONLY), 154 * the buffer length of the data to receive 155 * bit[23:16]: ([EL] bit[31:24]) extension address (TX ONLY), 156 * lower 4 bits are extension bits of @buffer, 157 * upper 4 bits are extension bits of @next_gpd 158 * @next_gpd: Physical address of the next GPD 159 * @buffer: Physical address of the data buffer 160 * @dw3_info: 161 * bit[15:0]: ([EL] bit[19:0]) data buffer length, 162 * (TX): the buffer length of the data to transmit 163 * (RX): The total length of data received 164 * bit[23:16]: ([EL] bit[31:24]) extension address (RX ONLY), 165 * lower 4 bits are extension bits of @buffer, 166 * upper 4 bits are extension bits of @next_gpd 167 * bit29: ([EL] abandoned) Zero Length Packet (ZLP) (TX ONLY) 168 */ 169 struct qmu_gpd { 170 __le32 dw0_info; 171 __le32 next_gpd; 172 __le32 buffer; 173 __le32 dw3_info; 174 } __packed; 175 176 /** 177 * dma: physical base address of GPD segment 178 * start: virtual base address of GPD segment 179 * end: the last GPD element 180 * enqueue: the first empty GPD to use 181 * dequeue: the first completed GPD serviced by ISR 182 * NOTE: the size of GPD ring should be >= 2 183 */ 184 struct mtu3_gpd_ring { 185 dma_addr_t dma; 186 struct qmu_gpd *start; 187 struct qmu_gpd *end; 188 struct qmu_gpd *enqueue; 189 struct qmu_gpd *dequeue; 190 }; 191 192 /** 193 * @vbus: vbus 5V used by host mode 194 * @edev: external connector used to detect vbus and iddig changes 195 * @vbus_nb: notifier for vbus detection 196 * @vbus_work : work of vbus detection notifier, used to avoid sleep in 197 * notifier callback which is atomic context 198 * @vbus_event : event of vbus detecion notifier 199 * @id_nb : notifier for iddig(idpin) detection 200 * @id_work : work of iddig detection notifier 201 * @id_event : event of iddig detecion notifier 202 * @role_sw : use USB Role Switch to support dual-role switch, can't use 203 * extcon at the same time, and extcon is deprecated. 204 * @role_sw_used : true when the USB Role Switch is used. 205 * @is_u3_drd: whether port0 supports usb3.0 dual-role device or not 206 * @manual_drd_enabled: it's true when supports dual-role device by debugfs 207 * to switch host/device modes depending on user input. 208 */ 209 struct otg_switch_mtk { 210 struct regulator *vbus; 211 struct extcon_dev *edev; 212 struct notifier_block vbus_nb; 213 struct work_struct vbus_work; 214 unsigned long vbus_event; 215 struct notifier_block id_nb; 216 struct work_struct id_work; 217 unsigned long id_event; 218 struct usb_role_switch *role_sw; 219 bool role_sw_used; 220 bool is_u3_drd; 221 bool manual_drd_enabled; 222 }; 223 224 /** 225 * @mac_base: register base address of device MAC, exclude xHCI's 226 * @ippc_base: register base address of IP Power and Clock interface (IPPC) 227 * @vusb33: usb3.3V shared by device/host IP 228 * @sys_clk: system clock of mtu3, shared by device/host IP 229 * @ref_clk: reference clock 230 * @mcu_clk: mcu_bus_ck clock for AHB bus etc 231 * @dma_clk: dma_bus_ck clock for AXI bus etc 232 * @dr_mode: works in which mode: 233 * host only, device only or dual-role mode 234 * @u2_ports: number of usb2.0 host ports 235 * @u3_ports: number of usb3.0 host ports 236 * @u3p_dis_msk: mask of disabling usb3 ports, for example, bit0==1 to 237 * disable u3port0, bit1==1 to disable u3port1,... etc 238 * @dbgfs_root: only used when supports manual dual-role switch via debugfs 239 * @uwk_en: it's true when supports remote wakeup in host mode 240 * @uwk: syscon including usb wakeup glue layer between SSUSB IP and SPM 241 * @uwk_reg_base: the base address of the wakeup glue layer in @uwk 242 * @uwk_vers: the version of the wakeup glue layer 243 */ 244 struct ssusb_mtk { 245 struct device *dev; 246 struct mtu3 *u3d; 247 void __iomem *mac_base; 248 void __iomem *ippc_base; 249 struct phy **phys; 250 int num_phys; 251 /* common power & clock */ 252 struct regulator *vusb33; 253 struct clk *sys_clk; 254 struct clk *ref_clk; 255 struct clk *mcu_clk; 256 struct clk *dma_clk; 257 /* otg */ 258 struct otg_switch_mtk otg_switch; 259 enum usb_dr_mode dr_mode; 260 bool is_host; 261 int u2_ports; 262 int u3_ports; 263 int u3p_dis_msk; 264 struct dentry *dbgfs_root; 265 /* usb wakeup for host mode */ 266 bool uwk_en; 267 struct regmap *uwk; 268 u32 uwk_reg_base; 269 u32 uwk_vers; 270 }; 271 272 /** 273 * @fifo_size: it is (@slot + 1) * @fifo_seg_size 274 * @fifo_seg_size: it is roundup_pow_of_two(@maxp) 275 */ 276 struct mtu3_ep { 277 struct usb_ep ep; 278 char name[12]; 279 struct mtu3 *mtu; 280 u8 epnum; 281 u8 type; 282 u8 is_in; 283 u16 maxp; 284 int slot; 285 u32 fifo_size; 286 u32 fifo_addr; 287 u32 fifo_seg_size; 288 struct mtu3_fifo_info *fifo; 289 290 struct list_head req_list; 291 struct mtu3_gpd_ring gpd_ring; 292 const struct usb_ss_ep_comp_descriptor *comp_desc; 293 const struct usb_endpoint_descriptor *desc; 294 295 int flags; 296 }; 297 298 struct mtu3_request { 299 struct usb_request request; 300 struct list_head list; 301 struct mtu3_ep *mep; 302 struct mtu3 *mtu; 303 struct qmu_gpd *gpd; 304 int epnum; 305 }; 306 307 static inline struct ssusb_mtk *dev_to_ssusb(struct device *dev) 308 { 309 return dev_get_drvdata(dev); 310 } 311 312 /** 313 * struct mtu3 - device driver instance data. 314 * @slot: MTU3_U2_IP_SLOT_DEFAULT for U2 IP only, 315 * MTU3_U3_IP_SLOT_DEFAULT for U3 IP 316 * @may_wakeup: means device's remote wakeup is enabled 317 * @is_self_powered: is reported in device status and the config descriptor 318 * @delayed_status: true when function drivers ask for delayed status 319 * @gen2cp: compatible with USB3 Gen2 IP 320 * @ep0_req: dummy request used while handling standard USB requests 321 * for GET_STATUS and SET_SEL 322 * @setup_buf: ep0 response buffer for GET_STATUS and SET_SEL requests 323 */ 324 struct mtu3 { 325 spinlock_t lock; 326 struct ssusb_mtk *ssusb; 327 struct device *dev; 328 void __iomem *mac_base; 329 void __iomem *ippc_base; 330 int irq; 331 332 struct mtu3_fifo_info tx_fifo; 333 struct mtu3_fifo_info rx_fifo; 334 335 struct mtu3_ep *ep_array; 336 struct mtu3_ep *in_eps; 337 struct mtu3_ep *out_eps; 338 struct mtu3_ep *ep0; 339 int num_eps; 340 int slot; 341 int active_ep; 342 343 struct dma_pool *qmu_gpd_pool; 344 enum mtu3_g_ep0_state ep0_state; 345 struct usb_gadget g; /* the gadget */ 346 struct usb_gadget_driver *gadget_driver; 347 struct mtu3_request ep0_req; 348 u8 setup_buf[EP0_RESPONSE_BUF]; 349 enum usb_device_speed max_speed; 350 enum usb_device_speed speed; 351 352 unsigned is_active:1; 353 unsigned may_wakeup:1; 354 unsigned is_self_powered:1; 355 unsigned test_mode:1; 356 unsigned softconnect:1; 357 unsigned u1_enable:1; 358 unsigned u2_enable:1; 359 unsigned is_u3_ip:1; 360 unsigned delayed_status:1; 361 unsigned gen2cp:1; 362 363 u8 address; 364 u8 test_mode_nr; 365 u32 hw_version; 366 }; 367 368 static inline struct mtu3 *gadget_to_mtu3(struct usb_gadget *g) 369 { 370 return container_of(g, struct mtu3, g); 371 } 372 373 static inline int is_first_entry(const struct list_head *list, 374 const struct list_head *head) 375 { 376 return list_is_last(head, list); 377 } 378 379 static inline struct mtu3_request *to_mtu3_request(struct usb_request *req) 380 { 381 return req ? container_of(req, struct mtu3_request, request) : NULL; 382 } 383 384 static inline struct mtu3_ep *to_mtu3_ep(struct usb_ep *ep) 385 { 386 return ep ? container_of(ep, struct mtu3_ep, ep) : NULL; 387 } 388 389 static inline struct mtu3_request *next_request(struct mtu3_ep *mep) 390 { 391 return list_first_entry_or_null(&mep->req_list, struct mtu3_request, 392 list); 393 } 394 395 static inline void mtu3_writel(void __iomem *base, u32 offset, u32 data) 396 { 397 writel(data, base + offset); 398 } 399 400 static inline u32 mtu3_readl(void __iomem *base, u32 offset) 401 { 402 return readl(base + offset); 403 } 404 405 static inline void mtu3_setbits(void __iomem *base, u32 offset, u32 bits) 406 { 407 void __iomem *addr = base + offset; 408 u32 tmp = readl(addr); 409 410 writel((tmp | (bits)), addr); 411 } 412 413 static inline void mtu3_clrbits(void __iomem *base, u32 offset, u32 bits) 414 { 415 void __iomem *addr = base + offset; 416 u32 tmp = readl(addr); 417 418 writel((tmp & ~(bits)), addr); 419 } 420 421 int ssusb_check_clocks(struct ssusb_mtk *ssusb, u32 ex_clks); 422 struct usb_request *mtu3_alloc_request(struct usb_ep *ep, gfp_t gfp_flags); 423 void mtu3_free_request(struct usb_ep *ep, struct usb_request *req); 424 void mtu3_req_complete(struct mtu3_ep *mep, 425 struct usb_request *req, int status); 426 427 int mtu3_config_ep(struct mtu3 *mtu, struct mtu3_ep *mep, 428 int interval, int burst, int mult); 429 void mtu3_deconfig_ep(struct mtu3 *mtu, struct mtu3_ep *mep); 430 void mtu3_ep_stall_set(struct mtu3_ep *mep, bool set); 431 void mtu3_ep0_setup(struct mtu3 *mtu); 432 void mtu3_start(struct mtu3 *mtu); 433 void mtu3_stop(struct mtu3 *mtu); 434 void mtu3_dev_on_off(struct mtu3 *mtu, int is_on); 435 void mtu3_set_speed(struct mtu3 *mtu, enum usb_device_speed speed); 436 437 int mtu3_gadget_setup(struct mtu3 *mtu); 438 void mtu3_gadget_cleanup(struct mtu3 *mtu); 439 void mtu3_gadget_reset(struct mtu3 *mtu); 440 void mtu3_gadget_suspend(struct mtu3 *mtu); 441 void mtu3_gadget_resume(struct mtu3 *mtu); 442 void mtu3_gadget_disconnect(struct mtu3 *mtu); 443 444 irqreturn_t mtu3_ep0_isr(struct mtu3 *mtu); 445 extern const struct usb_ep_ops mtu3_ep0_ops; 446 447 #endif 448