1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef FS_ENET_H
3 #define FS_ENET_H
4 
5 #include <linux/mii.h>
6 #include <linux/netdevice.h>
7 #include <linux/types.h>
8 #include <linux/list.h>
9 #include <linux/phy.h>
10 #include <linux/dma-mapping.h>
11 
12 #include <linux/fs_enet_pd.h>
13 #include <asm/fs_pd.h>
14 
15 #ifdef CONFIG_CPM1
16 #include <asm/cpm1.h>
17 #endif
18 
19 #if defined(CONFIG_FS_ENET_HAS_FEC)
20 #include <asm/cpm.h>
21 
22 #if defined(CONFIG_FS_ENET_MPC5121_FEC)
23 /* MPC5121 FEC has different register layout */
24 struct fec {
25 	u32 fec_reserved0;
26 	u32 fec_ievent;			/* Interrupt event reg */
27 	u32 fec_imask;			/* Interrupt mask reg */
28 	u32 fec_reserved1;
29 	u32 fec_r_des_active;		/* Receive descriptor reg */
30 	u32 fec_x_des_active;		/* Transmit descriptor reg */
31 	u32 fec_reserved2[3];
32 	u32 fec_ecntrl;			/* Ethernet control reg */
33 	u32 fec_reserved3[6];
34 	u32 fec_mii_data;		/* MII manage frame reg */
35 	u32 fec_mii_speed;		/* MII speed control reg */
36 	u32 fec_reserved4[7];
37 	u32 fec_mib_ctrlstat;		/* MIB control/status reg */
38 	u32 fec_reserved5[7];
39 	u32 fec_r_cntrl;		/* Receive control reg */
40 	u32 fec_reserved6[15];
41 	u32 fec_x_cntrl;		/* Transmit Control reg */
42 	u32 fec_reserved7[7];
43 	u32 fec_addr_low;		/* Low 32bits MAC address */
44 	u32 fec_addr_high;		/* High 16bits MAC address */
45 	u32 fec_opd;			/* Opcode + Pause duration */
46 	u32 fec_reserved8[10];
47 	u32 fec_hash_table_high;	/* High 32bits hash table */
48 	u32 fec_hash_table_low;		/* Low 32bits hash table */
49 	u32 fec_grp_hash_table_high;	/* High 32bits hash table */
50 	u32 fec_grp_hash_table_low;	/* Low 32bits hash table */
51 	u32 fec_reserved9[7];
52 	u32 fec_x_wmrk;			/* FIFO transmit water mark */
53 	u32 fec_reserved10;
54 	u32 fec_r_bound;		/* FIFO receive bound reg */
55 	u32 fec_r_fstart;		/* FIFO receive start reg */
56 	u32 fec_reserved11[11];
57 	u32 fec_r_des_start;		/* Receive descriptor ring */
58 	u32 fec_x_des_start;		/* Transmit descriptor ring */
59 	u32 fec_r_buff_size;		/* Maximum receive buff size */
60 	u32 fec_reserved12[26];
61 	u32 fec_dma_control;		/* DMA Endian and other ctrl */
62 };
63 #endif
64 
65 struct fec_info {
66 	struct fec __iomem *fecp;
67 	u32 mii_speed;
68 };
69 #endif
70 
71 #ifdef CONFIG_CPM2
72 #include <asm/cpm2.h>
73 #endif
74 
75 /* hw driver ops */
76 struct fs_ops {
77 	int (*setup_data)(struct net_device *dev);
78 	int (*allocate_bd)(struct net_device *dev);
79 	void (*free_bd)(struct net_device *dev);
80 	void (*cleanup_data)(struct net_device *dev);
81 	void (*set_multicast_list)(struct net_device *dev);
82 	void (*adjust_link)(struct net_device *dev);
83 	void (*restart)(struct net_device *dev);
84 	void (*stop)(struct net_device *dev);
85 	void (*napi_clear_event)(struct net_device *dev);
86 	void (*napi_enable)(struct net_device *dev);
87 	void (*napi_disable)(struct net_device *dev);
88 	void (*rx_bd_done)(struct net_device *dev);
89 	void (*tx_kickstart)(struct net_device *dev);
90 	u32 (*get_int_events)(struct net_device *dev);
91 	void (*clear_int_events)(struct net_device *dev, u32 int_events);
92 	void (*ev_error)(struct net_device *dev, u32 int_events);
93 	int (*get_regs)(struct net_device *dev, void *p, int *sizep);
94 	int (*get_regs_len)(struct net_device *dev);
95 	void (*tx_restart)(struct net_device *dev);
96 };
97 
98 struct phy_info {
99 	unsigned int id;
100 	const char *name;
101 	void (*startup) (struct net_device * dev);
102 	void (*shutdown) (struct net_device * dev);
103 	void (*ack_int) (struct net_device * dev);
104 };
105 
106 /* The FEC stores dest/src/type, data, and checksum for receive packets.
107  */
108 #define MAX_MTU 1508		/* Allow fullsized pppoe packets over VLAN */
109 #define MIN_MTU 46		/* this is data size */
110 #define CRC_LEN 4
111 
112 #define PKT_MAXBUF_SIZE		(MAX_MTU+ETH_HLEN+CRC_LEN)
113 #define PKT_MINBUF_SIZE		(MIN_MTU+ETH_HLEN+CRC_LEN)
114 
115 /* Must be a multiple of 32 (to cover both FEC & FCC) */
116 #define PKT_MAXBLR_SIZE		((PKT_MAXBUF_SIZE + 31) & ~31)
117 /* This is needed so that invalidate_xxx wont invalidate too much */
118 #define ENET_RX_ALIGN  16
119 #define ENET_RX_FRSIZE L1_CACHE_ALIGN(PKT_MAXBUF_SIZE + ENET_RX_ALIGN - 1)
120 
121 struct fs_enet_private {
122 	struct napi_struct napi;
123 	struct device *dev;	/* pointer back to the device (must be initialized first) */
124 	struct net_device *ndev;
125 	spinlock_t lock;	/* during all ops except TX pckt processing */
126 	spinlock_t tx_lock;	/* during fs_start_xmit and fs_tx         */
127 	struct fs_platform_info *fpi;
128 	struct work_struct timeout_work;
129 	const struct fs_ops *ops;
130 	int rx_ring, tx_ring;
131 	dma_addr_t ring_mem_addr;
132 	void __iomem *ring_base;
133 	struct sk_buff **rx_skbuff;
134 	struct sk_buff **tx_skbuff;
135 	char *mapped_as_page;
136 	cbd_t __iomem *rx_bd_base;	/* Address of Rx and Tx buffers.    */
137 	cbd_t __iomem *tx_bd_base;
138 	cbd_t __iomem *dirty_tx;	/* ring entries to be free()ed.     */
139 	cbd_t __iomem *cur_rx;
140 	cbd_t __iomem *cur_tx;
141 	int tx_free;
142 	const struct phy_info *phy;
143 	u32 msg_enable;
144 	struct mii_if_info mii_if;
145 	unsigned int last_mii_status;
146 	int interrupt;
147 
148 	int oldduplex, oldspeed, oldlink;	/* current settings */
149 
150 	/* event masks */
151 	u32 ev_napi;		/* mask of NAPI events */
152 	u32 ev;			/* event mask          */
153 	u32 ev_err;		/* error event mask       */
154 
155 	u16 bd_rx_empty;	/* mask of BD rx empty	  */
156 	u16 bd_rx_err;		/* mask of BD rx errors   */
157 
158 	union {
159 		struct {
160 			int idx;		/* FEC1 = 0, FEC2 = 1  */
161 			void __iomem *fecp;	/* hw registers        */
162 			u32 hthi, htlo;		/* state for multicast */
163 		} fec;
164 
165 		struct {
166 			int idx;		/* FCC1-3 = 0-2	       */
167 			void __iomem *fccp;	/* hw registers	       */
168 			void __iomem *ep;	/* parameter ram       */
169 			void __iomem *fcccp;	/* hw registers cont.  */
170 			void __iomem *mem;	/* FCC DPRAM */
171 			u32 gaddrh, gaddrl;	/* group address       */
172 		} fcc;
173 
174 		struct {
175 			int idx;		/* FEC1 = 0, FEC2 = 1  */
176 			void __iomem *sccp;	/* hw registers        */
177 			void __iomem *ep;	/* parameter ram       */
178 			u32 hthi, htlo;		/* state for multicast */
179 		} scc;
180 
181 	};
182 };
183 
184 /***************************************************************************/
185 
186 void fs_init_bds(struct net_device *dev);
187 void fs_cleanup_bds(struct net_device *dev);
188 
189 /***************************************************************************/
190 
191 #define DRV_MODULE_NAME		"fs_enet"
192 #define PFX DRV_MODULE_NAME	": "
193 
194 /***************************************************************************/
195 
196 int fs_enet_platform_init(void);
197 void fs_enet_platform_cleanup(void);
198 
199 /***************************************************************************/
200 /* buffer descriptor access macros */
201 
202 /* access macros */
203 #if defined(CONFIG_CPM1)
204 /* for a a CPM1 __raw_xxx's are sufficient */
205 #define __cbd_out32(addr, x)	__raw_writel(x, addr)
206 #define __cbd_out16(addr, x)	__raw_writew(x, addr)
207 #define __cbd_in32(addr)	__raw_readl(addr)
208 #define __cbd_in16(addr)	__raw_readw(addr)
209 #else
210 /* for others play it safe */
211 #define __cbd_out32(addr, x)	out_be32(addr, x)
212 #define __cbd_out16(addr, x)	out_be16(addr, x)
213 #define __cbd_in32(addr)	in_be32(addr)
214 #define __cbd_in16(addr)	in_be16(addr)
215 #endif
216 
217 /* write */
218 #define CBDW_SC(_cbd, _sc) 		__cbd_out16(&(_cbd)->cbd_sc, (_sc))
219 #define CBDW_DATLEN(_cbd, _datlen)	__cbd_out16(&(_cbd)->cbd_datlen, (_datlen))
220 #define CBDW_BUFADDR(_cbd, _bufaddr)	__cbd_out32(&(_cbd)->cbd_bufaddr, (_bufaddr))
221 
222 /* read */
223 #define CBDR_SC(_cbd) 			__cbd_in16(&(_cbd)->cbd_sc)
224 #define CBDR_DATLEN(_cbd)		__cbd_in16(&(_cbd)->cbd_datlen)
225 #define CBDR_BUFADDR(_cbd)		__cbd_in32(&(_cbd)->cbd_bufaddr)
226 
227 /* set bits */
228 #define CBDS_SC(_cbd, _sc) 		CBDW_SC(_cbd, CBDR_SC(_cbd) | (_sc))
229 
230 /* clear bits */
231 #define CBDC_SC(_cbd, _sc) 		CBDW_SC(_cbd, CBDR_SC(_cbd) & ~(_sc))
232 
233 /*******************************************************************/
234 
235 extern const struct fs_ops fs_fec_ops;
236 extern const struct fs_ops fs_fcc_ops;
237 extern const struct fs_ops fs_scc_ops;
238 
239 /*******************************************************************/
240 
241 #endif
242