1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3  * Faraday FOTG210 USB OTG controller
4  *
5  * Copyright (C) 2013 Faraday Technology Corporation
6  * Author: Yuan-Hsin Chen <yhchen@faraday-tech.com>
7  */
8 
9 #include <linux/kernel.h>
10 
11 #define FOTG210_MAX_NUM_EP	5 /* ep0...ep4 */
12 #define FOTG210_MAX_FIFO_NUM	4 /* fifo0...fifo4 */
13 
14 /* Global Mask of HC/OTG/DEV interrupt Register(0xC4) */
15 #define FOTG210_GMIR		0xC4
16 #define GMIR_INT_POLARITY	0x8 /*Active High*/
17 #define GMIR_MHC_INT		0x4
18 #define GMIR_MOTG_INT		0x2
19 #define GMIR_MDEV_INT		0x1
20 
21 /*  Device Main Control Register(0x100) */
22 #define FOTG210_DMCR		0x100
23 #define DMCR_HS_EN		(1 << 6)
24 #define DMCR_CHIP_EN		(1 << 5)
25 #define DMCR_SFRST		(1 << 4)
26 #define DMCR_GOSUSP		(1 << 3)
27 #define DMCR_GLINT_EN		(1 << 2)
28 #define DMCR_HALF_SPEED		(1 << 1)
29 #define DMCR_CAP_RMWAKUP	(1 << 0)
30 
31 /* Device Address Register(0x104) */
32 #define FOTG210_DAR		0x104
33 #define DAR_AFT_CONF		(1 << 7)
34 
35 /* Device Test Register(0x108) */
36 #define FOTG210_DTR		0x108
37 #define DTR_TST_CLRFF		(1 << 0)
38 
39 /* PHY Test Mode Selector register(0x114) */
40 #define FOTG210_PHYTMSR		0x114
41 #define PHYTMSR_TST_PKT		(1 << 4)
42 #define PHYTMSR_TST_SE0NAK	(1 << 3)
43 #define PHYTMSR_TST_KSTA	(1 << 2)
44 #define PHYTMSR_TST_JSTA	(1 << 1)
45 #define PHYTMSR_UNPLUG		(1 << 0)
46 
47 /* Cx configuration and FIFO Empty Status register(0x120) */
48 #define FOTG210_DCFESR		0x120
49 #define DCFESR_FIFO_EMPTY(fifo)	(1 << 8 << (fifo))
50 #define DCFESR_CX_EMP		(1 << 5)
51 #define DCFESR_CX_CLR		(1 << 3)
52 #define DCFESR_CX_STL		(1 << 2)
53 #define DCFESR_TST_PKDONE	(1 << 1)
54 #define DCFESR_CX_DONE		(1 << 0)
55 
56 /* Device IDLE Counter Register(0x124) */
57 #define FOTG210_DICR		0x124
58 
59 /* Device Mask of Interrupt Group Register (0x130) */
60 #define FOTG210_DMIGR		0x130
61 #define DMIGR_MINT_G0		(1 << 0)
62 
63 /* Device Mask of Interrupt Source Group 0(0x134) */
64 #define FOTG210_DMISGR0		0x134
65 #define DMISGR0_MCX_COMEND	(1 << 3)
66 #define DMISGR0_MCX_OUT_INT	(1 << 2)
67 #define DMISGR0_MCX_IN_INT	(1 << 1)
68 #define DMISGR0_MCX_SETUP_INT	(1 << 0)
69 
70 /* Device Mask of Interrupt Source Group 1 Register(0x138)*/
71 #define FOTG210_DMISGR1		0x138
72 #define DMISGR1_MF3_IN_INT	(1 << 19)
73 #define DMISGR1_MF2_IN_INT	(1 << 18)
74 #define DMISGR1_MF1_IN_INT	(1 << 17)
75 #define DMISGR1_MF0_IN_INT	(1 << 16)
76 #define DMISGR1_MF_IN_INT(fifo)	(1 << (16 + (fifo)))
77 #define DMISGR1_MF3_SPK_INT	(1 << 7)
78 #define DMISGR1_MF3_OUT_INT	(1 << 6)
79 #define DMISGR1_MF2_SPK_INT	(1 << 5)
80 #define DMISGR1_MF2_OUT_INT	(1 << 4)
81 #define DMISGR1_MF1_SPK_INT	(1 << 3)
82 #define DMISGR1_MF1_OUT_INT	(1 << 2)
83 #define DMISGR1_MF0_SPK_INT	(1 << 1)
84 #define DMISGR1_MF0_OUT_INT	(1 << 0)
85 #define DMISGR1_MF_OUTSPK_INT(fifo)	(0x3 << (fifo) * 2)
86 
87 /* Device Mask of Interrupt Source Group 2 Register (0x13C) */
88 #define FOTG210_DMISGR2		0x13C
89 #define DMISGR2_MDMA_ERROR	(1 << 8)
90 #define DMISGR2_MDMA_CMPLT	(1 << 7)
91 
92 /* Device Interrupt group Register (0x140) */
93 #define FOTG210_DIGR		0x140
94 #define DIGR_INT_G2		(1 << 2)
95 #define DIGR_INT_G1		(1 << 1)
96 #define DIGR_INT_G0		(1 << 0)
97 
98 /* Device Interrupt Source Group 0 Register (0x144) */
99 #define FOTG210_DISGR0		0x144
100 #define DISGR0_CX_COMABT_INT	(1 << 5)
101 #define DISGR0_CX_COMFAIL_INT	(1 << 4)
102 #define DISGR0_CX_COMEND_INT	(1 << 3)
103 #define DISGR0_CX_OUT_INT	(1 << 2)
104 #define DISGR0_CX_IN_INT	(1 << 1)
105 #define DISGR0_CX_SETUP_INT	(1 << 0)
106 
107 /* Device Interrupt Source Group 1 Register (0x148) */
108 #define FOTG210_DISGR1		0x148
109 #define DISGR1_OUT_INT(fifo)	(1 << ((fifo) * 2))
110 #define DISGR1_SPK_INT(fifo)	(1 << 1 << ((fifo) * 2))
111 #define DISGR1_IN_INT(fifo)	(1 << 16 << (fifo))
112 
113 /* Device Interrupt Source Group 2 Register (0x14C) */
114 #define FOTG210_DISGR2		0x14C
115 #define DISGR2_DMA_ERROR	(1 << 8)
116 #define DISGR2_DMA_CMPLT	(1 << 7)
117 #define DISGR2_RX0BYTE_INT	(1 << 6)
118 #define DISGR2_TX0BYTE_INT	(1 << 5)
119 #define DISGR2_ISO_SEQ_ABORT_INT	(1 << 4)
120 #define DISGR2_ISO_SEQ_ERR_INT	(1 << 3)
121 #define DISGR2_RESM_INT		(1 << 2)
122 #define DISGR2_SUSP_INT		(1 << 1)
123 #define DISGR2_USBRST_INT	(1 << 0)
124 
125 /* Device Receive Zero-Length Data Packet Register (0x150)*/
126 #define FOTG210_RX0BYTE		0x150
127 #define RX0BYTE_EP8		(1 << 7)
128 #define RX0BYTE_EP7		(1 << 6)
129 #define RX0BYTE_EP6		(1 << 5)
130 #define RX0BYTE_EP5		(1 << 4)
131 #define RX0BYTE_EP4		(1 << 3)
132 #define RX0BYTE_EP3		(1 << 2)
133 #define RX0BYTE_EP2		(1 << 1)
134 #define RX0BYTE_EP1		(1 << 0)
135 
136 /* Device Transfer Zero-Length Data Packet Register (0x154)*/
137 #define FOTG210_TX0BYTE		0x154
138 #define TX0BYTE_EP8		(1 << 7)
139 #define TX0BYTE_EP7		(1 << 6)
140 #define TX0BYTE_EP6		(1 << 5)
141 #define TX0BYTE_EP5		(1 << 4)
142 #define TX0BYTE_EP4		(1 << 3)
143 #define TX0BYTE_EP3		(1 << 2)
144 #define TX0BYTE_EP2		(1 << 1)
145 #define TX0BYTE_EP1		(1 << 0)
146 
147 /* Device IN Endpoint x MaxPacketSize Register(0x160+4*(x-1)) */
148 #define FOTG210_INEPMPSR(ep)	(0x160 + 4 * ((ep) - 1))
149 #define INOUTEPMPSR_MPS(mps)	((mps) & 0x2FF)
150 #define INOUTEPMPSR_STL_EP	(1 << 11)
151 #define INOUTEPMPSR_RESET_TSEQ	(1 << 12)
152 
153 /* Device OUT Endpoint x MaxPacketSize Register(0x180+4*(x-1)) */
154 #define FOTG210_OUTEPMPSR(ep)	(0x180 + 4 * ((ep) - 1))
155 
156 /* Device Endpoint 1~4 Map Register (0x1A0) */
157 #define FOTG210_EPMAP		0x1A0
158 #define EPMAP_FIFONO(ep, dir)		\
159 	((((ep) - 1) << ((ep) - 1) * 8) << ((dir) ? 0 : 4))
160 #define EPMAP_FIFONOMSK(ep, dir)	\
161 	((3 << ((ep) - 1) * 8) << ((dir) ? 0 : 4))
162 
163 /* Device FIFO Map Register (0x1A8) */
164 #define FOTG210_FIFOMAP		0x1A8
165 #define FIFOMAP_DIROUT(fifo)	(0x0 << 4 << (fifo) * 8)
166 #define FIFOMAP_DIRIN(fifo)	(0x1 << 4 << (fifo) * 8)
167 #define FIFOMAP_BIDIR(fifo)	(0x2 << 4 << (fifo) * 8)
168 #define FIFOMAP_NA(fifo)	(0x3 << 4 << (fifo) * 8)
169 #define FIFOMAP_EPNO(ep)	((ep) << ((ep) - 1) * 8)
170 #define FIFOMAP_EPNOMSK(ep)	(0xF << ((ep) - 1) * 8)
171 
172 /* Device FIFO Confuguration Register (0x1AC) */
173 #define FOTG210_FIFOCF		0x1AC
174 #define FIFOCF_TYPE(type, fifo)	((type) << (fifo) * 8)
175 #define FIFOCF_BLK_SIN(fifo)	(0x0 << (fifo) * 8 << 2)
176 #define FIFOCF_BLK_DUB(fifo)	(0x1 << (fifo) * 8 << 2)
177 #define FIFOCF_BLK_TRI(fifo)	(0x2 << (fifo) * 8 << 2)
178 #define FIFOCF_BLKSZ_512(fifo)	(0x0 << (fifo) * 8 << 4)
179 #define FIFOCF_BLKSZ_1024(fifo)	(0x1 << (fifo) * 8 << 4)
180 #define FIFOCF_FIFO_EN(fifo)	(0x1 << (fifo) * 8 << 5)
181 
182 /* Device FIFO n Instruction and Byte Count Register (0x1B0+4*n) */
183 #define FOTG210_FIBCR(fifo)	(0x1B0 + (fifo) * 4)
184 #define FIBCR_BCFX		0x7FF
185 #define FIBCR_FFRST		(1 << 12)
186 
187 /* Device DMA Target FIFO Number Register (0x1C0) */
188 #define FOTG210_DMATFNR		0x1C0
189 #define DMATFNR_ACC_CXF		(1 << 4)
190 #define DMATFNR_ACC_F3		(1 << 3)
191 #define DMATFNR_ACC_F2		(1 << 2)
192 #define DMATFNR_ACC_F1		(1 << 1)
193 #define DMATFNR_ACC_F0		(1 << 0)
194 #define DMATFNR_ACC_FN(fifo)	(1 << (fifo))
195 #define DMATFNR_DISDMA		0
196 
197 /* Device DMA Controller Parameter setting 1 Register (0x1C8) */
198 #define FOTG210_DMACPSR1	0x1C8
199 #define DMACPSR1_DMA_LEN(len)	(((len) & 0xFFFF) << 8)
200 #define DMACPSR1_DMA_ABORT	(1 << 3)
201 #define DMACPSR1_DMA_TYPE(dir_in)	(((dir_in) ? 1 : 0) << 1)
202 #define DMACPSR1_DMA_START	(1 << 0)
203 
204 /* Device DMA Controller Parameter setting 2 Register (0x1CC) */
205 #define FOTG210_DMACPSR2	0x1CC
206 
207 /* Device DMA Controller Parameter setting 3 Register (0x1CC) */
208 #define FOTG210_CXPORT		0x1D0
209 
210 struct fotg210_request {
211 	struct usb_request	req;
212 	struct list_head	queue;
213 };
214 
215 struct fotg210_ep {
216 	struct usb_ep		ep;
217 	struct fotg210_udc	*fotg210;
218 
219 	struct list_head	queue;
220 	unsigned		stall:1;
221 	unsigned		wedged:1;
222 	unsigned		use_dma:1;
223 
224 	unsigned char		epnum;
225 	unsigned char		type;
226 	unsigned char		dir_in;
227 	unsigned int		maxp;
228 	const struct usb_endpoint_descriptor	*desc;
229 };
230 
231 struct fotg210_udc {
232 	spinlock_t		lock; /* protect the struct */
233 	void __iomem		*reg;
234 
235 	unsigned long		irq_trigger;
236 
237 	struct usb_gadget		gadget;
238 	struct usb_gadget_driver	*driver;
239 
240 	struct fotg210_ep	*ep[FOTG210_MAX_NUM_EP];
241 
242 	struct usb_request	*ep0_req;	/* for internal request */
243 	__le16			ep0_data;
244 	u8			ep0_dir;	/* 0/0x80  out/in */
245 
246 	u8			reenum;		/* if re-enumeration */
247 };
248 
249 #define gadget_to_fotg210(g)	container_of((g), struct fotg210_udc, gadget)
250