xref: /rk3399_rockchip-uboot/drivers/net/xilinx_ll_temac_sdma.h (revision 8ff43b03e9f38a6e136e2e20eec4e8b2eb4a1d3d)
1 /*
2  * Xilinx xps_ll_temac ethernet driver for u-boot
3  *
4  * SDMA sub-controller interface
5  *
6  * Copyright (C) 2011 - 2012 Stephan Linz <linz@li-pro.net>
7  * Copyright (C) 2008 - 2011 Michal Simek <monstr@monstr.eu>
8  * Copyright (C) 2008 - 2011 PetaLogix
9  *
10  * Based on Yoshio Kashiwagi kashiwagi@co-nss.co.jp driver
11  * Copyright (C) 2008 Nissin Systems Co.,Ltd.
12  * March 2008 created
13  *
14  * This program is free software; you can redistribute it and/or modify it
15  * under the terms of the GNU General Public License as published by the
16  * Free Software Foundation; either version 2 of the License, or (at your
17  * option) any later version.
18  *
19  * [0]: http://www.xilinx.com/support/documentation
20  *
21  * [S]:	[0]/ip_documentation/xps_ll_temac.pdf
22  * [A]:	[0]/application_notes/xapp1041.pdf
23  */
24 #ifndef _XILINX_LL_TEMAC_SDMA_
25 #define _XILINX_LL_TEMAC_SDMA_
26 
27 #include <net.h>
28 
29 #include <asm/types.h>
30 #include <asm/byteorder.h>
31 
32 #include <linux/compiler.h>
33 
34 #if !defined(__BIG_ENDIAN)
35 # error LL_TEMAC requires big endianess
36 #endif
37 
38 /*
39  * DMA Buffer Descriptor for CDMAC
40  *
41  * Used for data connection from and to (Rx/Tx) the LocalLink (LL) TEMAC via
42  * the Communications Direct Memory Access Controller (CDMAC) -- one for each.
43  *
44  * overview:
45  *      ftp://ftp.xilinx.com/pub/documentation/misc/mpmc_getting_started.pdf
46  *
47  * [1]: [0]/ip_documentation/mpmc.pdf
48  *      page 140, DMA Operation Descriptors
49  *
50  * [2]:	[0]/user_guides/ug200.pdf
51  *	page 229, DMA Controller -- Descriptor Format
52  *
53  * [3]:	[0]/ip_documentation/xps_ll_temac.pdf
54  *	page 72, Transmit LocalLink Frame Format
55  *	page 73, Receive LocalLink Frame Format
56  */
57 struct cdmac_bd {
58 	struct cdmac_bd *next_p;	/* Next Descriptor Pointer */
59 	u8 *phys_buf_p;			/* Buffer Address */
60 	u32 buf_len;			/* Buffer Length */
61 	union {
62 		u8 stctrl;		/* Status/Control the DMA transfer */
63 		u32 app[5];		/* application specific data */
64 	} __packed __aligned(1) sca;
65 };
66 
67 /* CDMAC Descriptor Status and Control (stctrl), [1] p140, [2] p230 */
68 #define CDMAC_BD_STCTRL_ERROR		(1 << 7)
69 #define CDMAC_BD_STCTRL_IRQ_ON_END	(1 << 6)
70 #define CDMAC_BD_STCTRL_STOP_ON_END	(1 << 5)
71 #define CDMAC_BD_STCTRL_COMPLETED	(1 << 4)
72 #define CDMAC_BD_STCTRL_SOP		(1 << 3)
73 #define CDMAC_BD_STCTRL_EOP		(1 << 2)
74 #define CDMAC_BD_STCTRL_DMACHBUSY	(1 << 1)
75 
76 /* CDMAC Descriptor APP0: Transmit LocalLink Footer Word 3, [3] p72 */
77 #define CDMAC_BD_APP0_TXCSCNTRL		(1 << 0)
78 
79 /* CDMAC Descriptor APP1: Transmit LocalLink Footer Word 4, [3] p73 */
80 #define CDMAC_BD_APP1_TXCSBEGIN_POS	16
81 #define CDMAC_BD_APP1_TXCSBEGIN_MASK	(0xFFFF << CDMAC_BD_APP1_TXCSBEGIN_POS)
82 #define CDMAC_BD_APP1_TXCSINSERT_POS	0
83 #define CDMAC_BD_APP1_TXCSINSERT_MASK	(0xFFFF << CDMAC_BD_APP1_TXCSINSERT_POS)
84 
85 /* CDMAC Descriptor APP2: Transmit LocalLink Footer Word 5, [3] p73 */
86 #define CDMAC_BD_APP2_TXCSINIT_POS	0
87 #define CDMAC_BD_APP2_TXCSINIT_MASK	(0xFFFF << CDMAC_BD_APP2_TXCSINIT_POS)
88 
89 /* CDMAC Descriptor APP0: Receive LocalLink Footer Word 3, [3] p73 */
90 #define CDMAC_BD_APP0_MADDRU_POS	0
91 #define CDMAC_BD_APP0_MADDRU_MASK	(0xFFFF << CDMAC_BD_APP0_MADDRU_POS)
92 
93 /* CDMAC Descriptor APP1: Receive LocalLink Footer Word 4, [3] p74 */
94 #define CDMAC_BD_APP1_MADDRL_POS	0
95 #define CDMAC_BD_APP1_MADDRL_MASK	(~0UL << CDMAC_BD_APP1_MADDRL_POS)
96 
97 /* CDMAC Descriptor APP2: Receive LocalLink Footer Word 5, [3] p74 */
98 #define CDMAC_BD_APP2_BCAST_FRAME	(1 << 2)
99 #define CDMAC_BD_APP2_IPC_MCAST_FRAME	(1 << 1)
100 #define CDMAC_BD_APP2_MAC_MCAST_FRAME	(1 << 0)
101 
102 /* CDMAC Descriptor APP3: Receive LocalLink Footer Word 6, [3] p74 */
103 #define CDMAC_BD_APP3_TLTPID_POS	16
104 #define CDMAC_BD_APP3_TLTPID_MASK	(0xFFFF << CDMAC_BD_APP3_TLTPID_POS)
105 #define CDMAC_BD_APP3_RXCSRAW_POS	0
106 #define CDMAC_BD_APP3_RXCSRAW_MASK	(0xFFFF << CDMAC_BD_APP3_RXCSRAW_POS)
107 
108 /* CDMAC Descriptor APP4: Receive LocalLink Footer Word 7, [3] p74 */
109 #define CDMAC_BD_APP4_VLANTAG_POS	16
110 #define CDMAC_BD_APP4_VLANTAG_MASK	(0xFFFF << CDMAC_BD_APP4_VLANTAG_POS)
111 #define CDMAC_BD_APP4_RXBYTECNT_POS	0
112 #define CDMAC_BD_APP4_RXBYTECNT_MASK	(0x3FFF << CDMAC_BD_APP4_RXBYTECNT_POS)
113 
114 /*
115  * SDMA Register Definition
116  *
117  * [0]: http://www.xilinx.com/support/documentation
118  *
119  * [1]:	[0]/ip_documentation/mpmc.pdf
120  *	page 54, SDMA Register Summary
121  *	page 160, SDMA Registers
122  *
123  * [2]:	[0]/user_guides/ug200.pdf
124  *	page 244, DMA Controller -- Programming Interface and Registers
125  */
126 #define SDMA_CTRL_REGTYPE	u32
127 #define SDMA_CTRL_REGSIZE	sizeof(SDMA_CTRL_REGTYPE)
128 struct sdma_ctrl {
129 	/* Transmit Registers */
130 	SDMA_CTRL_REGTYPE tx_nxtdesc_ptr;   /* TX Next Description Pointer */
131 	SDMA_CTRL_REGTYPE tx_curbuf_addr;   /* TX Current Buffer Address */
132 	SDMA_CTRL_REGTYPE tx_curbuf_length; /* TX Current Buffer Length */
133 	SDMA_CTRL_REGTYPE tx_curdesc_ptr;   /* TX Current Descriptor Pointer */
134 	SDMA_CTRL_REGTYPE tx_taildesc_ptr;  /* TX Tail Descriptor Pointer */
135 	SDMA_CTRL_REGTYPE tx_chnl_ctrl;     /* TX Channel Control */
136 	SDMA_CTRL_REGTYPE tx_irq_reg;       /* TX Interrupt Register */
137 	SDMA_CTRL_REGTYPE tx_chnl_sts;      /* TX Status Register */
138 	/* Receive Registers */
139 	SDMA_CTRL_REGTYPE rx_nxtdesc_ptr;   /* RX Next Descriptor Pointer */
140 	SDMA_CTRL_REGTYPE rx_curbuf_addr;   /* RX Current Buffer Address */
141 	SDMA_CTRL_REGTYPE rx_curbuf_length; /* RX Current Buffer Length */
142 	SDMA_CTRL_REGTYPE rx_curdesc_ptr;   /* RX Current Descriptor Pointer */
143 	SDMA_CTRL_REGTYPE rx_taildesc_ptr;  /* RX Tail Descriptor Pointer */
144 	SDMA_CTRL_REGTYPE rx_chnl_ctrl;     /* RX Channel Control */
145 	SDMA_CTRL_REGTYPE rx_irq_reg;       /* RX Interrupt Register */
146 	SDMA_CTRL_REGTYPE rx_chnl_sts;      /* RX Status Register */
147 	/* Control Registers */
148 	SDMA_CTRL_REGTYPE dma_control_reg;  /* DMA Control Register */
149 };
150 
151 #define SDMA_CTRL_REGNUMS	sizeof(struct sdma_ctrl)/SDMA_CTRL_REGSIZE
152 
153 /*
154  * DMAC Register Index Enumeration
155  *
156  * [2]:	http://www.xilinx.com/support/documentation/user_guides/ug200.pdf
157  *	page 244, DMA Controller -- Programming Interface and Registers
158  */
159 enum dmac_ctrl {
160 	/* Transmit Registers */
161 	TX_NXTDESC_PTR = 0,	/* TX Next Description Pointer */
162 	TX_CURBUF_ADDR,		/* TX Current Buffer Address */
163 	TX_CURBUF_LENGTH,	/* TX Current Buffer Length */
164 	TX_CURDESC_PTR,		/* TX Current Descriptor Pointer */
165 	TX_TAILDESC_PTR,	/* TX Tail Descriptor Pointer */
166 	TX_CHNL_CTRL,		/* TX Channel Control */
167 	TX_IRQ_REG,		/* TX Interrupt Register */
168 	TX_CHNL_STS,		/* TX Status Register */
169 	/* Receive Registers */
170 	RX_NXTDESC_PTR,		/* RX Next Descriptor Pointer */
171 	RX_CURBUF_ADDR,		/* RX Current Buffer Address */
172 	RX_CURBUF_LENGTH,	/* RX Current Buffer Length */
173 	RX_CURDESC_PTR,		/* RX Current Descriptor Pointer */
174 	RX_TAILDESC_PTR,	/* RX Tail Descriptor Pointer */
175 	RX_CHNL_CTRL,		/* RX Channel Control */
176 	RX_IRQ_REG,		/* RX Interrupt Register */
177 	RX_CHNL_STS,		/* RX Status Register */
178 	/* Control Registers */
179 	DMA_CONTROL_REG		/* DMA Control Register */
180 };
181 
182 /* Rx/Tx Channel Control Register (*_chnl_ctrl), [1] p163, [2] p246/p252 */
183 #define CHNL_CTRL_ITO_POS	24
184 #define CHNL_CTRL_ITO_MASK	(0xFF << CHNL_CTRL_ITO_POS)
185 #define CHNL_CTRL_IC_POS	16
186 #define CHNL_CTRL_IC_MASK	(0xFF << CHNL_CTRL_IC_POS)
187 #define CHNL_CTRL_MSBADDR_POS	12
188 #define CHNL_CTRL_MSBADDR_MASK	(0xF << CHNL_CTRL_MSBADDR_POS)
189 #define CHNL_CTRL_AME		(1 << 11)
190 #define CHNL_CTRL_OBWC		(1 << 10)
191 #define CHNL_CTRL_IOE		(1 << 9)
192 #define CHNL_CTRL_LIC		(1 << 8)
193 #define CHNL_CTRL_IE		(1 << 7)
194 #define CHNL_CTRL_IEE		(1 << 2)
195 #define CHNL_CTRL_IDE		(1 << 1)
196 #define CHNL_CTRL_ICE		(1 << 0)
197 
198 /* All interrupt enable bits */
199 #define CHNL_CTRL_IRQ_MASK	(CHNL_CTRL_IE | \
200 				 CHNL_CTRL_IEE | \
201 				 CHNL_CTRL_IDE | \
202 				 CHNL_CTRL_ICE)
203 
204 /* Rx/Tx Interrupt Status Register (*_irq_reg), [1] p164, [2] p247/p253 */
205 #define IRQ_REG_DTV_POS		24
206 #define IRQ_REG_DTV_MASK	(0xFF << IRQ_REG_DTV_POS)
207 #define IRQ_REG_CCV_POS		16
208 #define IRQ_REG_CCV_MASK	(0xFF << IRQ_REG_CCV_POS)
209 #define IRQ_REG_WRCQ_EMPTY	(1 << 14)
210 #define IRQ_REG_CIC_POS		10
211 #define IRQ_REG_CIC_MASK	(0xF << IRQ_REG_CIC_POS)
212 #define IRQ_REG_DIC_POS		8
213 #define IRQ_REG_DIC_MASK	(3 << 8)
214 #define IRQ_REG_PLB_RD_NMI	(1 << 4)
215 #define IRQ_REG_PLB_WR_NMI	(1 << 3)
216 #define IRQ_REG_EI		(1 << 2)
217 #define IRQ_REG_DI		(1 << 1)
218 #define IRQ_REG_CI		(1 << 0)
219 
220 /* All interrupt bits */
221 #define IRQ_REG_IRQ_MASK	(IRQ_REG_PLB_RD_NMI | \
222 				 IRQ_REG_PLB_WR_NMI | \
223 				 IRQ_REG_EI | IRQ_REG_DI | IRQ_REG_CI)
224 
225 /* Rx/Tx Channel Status Register (*_chnl_sts), [1] p165, [2] p249/p255 */
226 #define CHNL_STS_ERROR_TAIL	(1 << 21)
227 #define CHNL_STS_ERROR_CMP	(1 << 20)
228 #define CHNL_STS_ERROR_ADDR	(1 << 19)
229 #define CHNL_STS_ERROR_NXTP	(1 << 18)
230 #define CHNL_STS_ERROR_CURP	(1 << 17)
231 #define CHNL_STS_ERROR_BSYWR	(1 << 16)
232 #define CHNL_STS_ERROR		(1 << 7)
233 #define CHNL_STS_IOE		(1 << 6)
234 #define CHNL_STS_SOE		(1 << 5)
235 #define CHNL_STS_CMPLT		(1 << 4)
236 #define CHNL_STS_SOP		(1 << 3)
237 #define CHNL_STS_EOP		(1 << 2)
238 #define CHNL_STS_EBUSY		(1 << 1)
239 
240 /* DMA Control Register (dma_control_reg), [1] p166, [2] p256 */
241 #define DMA_CONTROL_PLBED	(1 << 5)
242 #define DMA_CONTROL_RXOCEID	(1 << 4)
243 #define DMA_CONTROL_TXOCEID	(1 << 3)
244 #define DMA_CONTROL_TPE		(1 << 2)
245 #define DMA_CONTROL_RESET	(1 << 0)
246 
247 #if defined(CONFIG_XILINX_440) || defined(CONFIG_XILINX_405)
248 
249 /* Xilinx Device Control Register (DCR) in/out accessors */
250 unsigned ll_temac_xldcr_in32(phys_addr_t addr);
251 void ll_temac_xldcr_out32(phys_addr_t addr, unsigned value);
252 
253 /* collect all register addresses for Xilinx DCR in/out accessors */
254 void ll_temac_collect_xldcr_sdma_reg_addr(struct eth_device *dev);
255 
256 #endif /* CONFIG_XILINX_440 || CONFIG_XILINX_405 */
257 
258 /* Xilinx Processor Local Bus (PLB) in/out accessors */
259 unsigned ll_temac_xlplb_in32(phys_addr_t base);
260 void ll_temac_xlplb_out32(phys_addr_t base, unsigned value);
261 
262 /* collect all register addresses for Xilinx PLB in/out accessors */
263 void ll_temac_collect_xlplb_sdma_reg_addr(struct eth_device *dev);
264 
265 /* initialize both Rx/Tx buffer descriptors */
266 int ll_temac_init_sdma(struct eth_device *dev);
267 
268 /* halt both Rx/Tx transfers */
269 int ll_temac_halt_sdma(struct eth_device *dev);
270 
271 /* reset SDMA and IRQ, disable interrupts and errors */
272 int ll_temac_reset_sdma(struct eth_device *dev);
273 
274 /* receive buffered data from SDMA (polling ISR) */
275 int ll_temac_recv_sdma(struct eth_device *dev);
276 
277 /* send buffered data to SDMA */
278 int ll_temac_send_sdma(struct eth_device *dev, void *packet, int length);
279 
280 #endif /* _XILINX_LL_TEMAC_SDMA_ */
281