1 /* SPDX-License-Identifier: GPL-2.0+ */
3 * (c) 2015 Purna Chandra Mandal <purna.mandal@microchip.com>
7 #ifndef __MICROCHIP_PIC32_ETH_H_
8 #define __MICROCHIP_PIC32_ETH_H_
10 #include <linux/bitops.h>
11 #include <mach/pic32.h>
14 struct pic32_ectl_regs {
15 struct pic32_reg_atomic con1; /* 0x00 */
16 struct pic32_reg_atomic con2; /* 0x10 */
17 struct pic32_reg_atomic txst; /* 0x20 */
18 struct pic32_reg_atomic rxst; /* 0x30 */
19 struct pic32_reg_atomic ht0; /* 0x40 */
20 struct pic32_reg_atomic ht1; /* 0x50 */
21 struct pic32_reg_atomic pmm0; /* 0x60 */
22 struct pic32_reg_atomic pmm1; /* 0x70 */
23 struct pic32_reg_atomic pmcs; /* 0x80 */
24 struct pic32_reg_atomic pmo; /* 0x90 */
25 struct pic32_reg_atomic rxfc; /* 0xa0 */
26 struct pic32_reg_atomic rxwm; /* 0xb0 */
27 struct pic32_reg_atomic ien; /* 0xc0 */
28 struct pic32_reg_atomic irq; /* 0xd0 */
29 struct pic32_reg_atomic stat; /* 0xe0 */
32 struct pic32_mii_regs {
33 struct pic32_reg_atomic mcfg; /* 0x280 */
34 struct pic32_reg_atomic mcmd; /* 0x290 */
35 struct pic32_reg_atomic madr; /* 0x2a0 */
36 struct pic32_reg_atomic mwtd; /* 0x2b0 */
37 struct pic32_reg_atomic mrdd; /* 0x2c0 */
38 struct pic32_reg_atomic mind; /* 0x2d0 */
41 struct pic32_emac_regs {
42 struct pic32_reg_atomic cfg1; /* 0x200*/
43 struct pic32_reg_atomic cfg2; /* 0x210*/
44 struct pic32_reg_atomic ipgt; /* 0x220*/
45 struct pic32_reg_atomic ipgr; /* 0x230*/
46 struct pic32_reg_atomic clrt; /* 0x240*/
47 struct pic32_reg_atomic maxf; /* 0x250*/
48 struct pic32_reg_atomic supp; /* 0x260*/
49 struct pic32_reg_atomic test; /* 0x270*/
50 struct pic32_mii_regs mii; /* 0x280 - 0x2d0 */
51 struct pic32_reg_atomic res1; /* 0x2e0 */
52 struct pic32_reg_atomic res2; /* 0x2f0 */
53 struct pic32_reg_atomic sa0; /* 0x300 */
54 struct pic32_reg_atomic sa1; /* 0x310 */
55 struct pic32_reg_atomic sa2; /* 0x320 */
58 /* ETHCON1 Reg field */
59 #define ETHCON_BUFCDEC BIT(0)
60 #define ETHCON_RXEN BIT(8)
61 #define ETHCON_TXRTS BIT(9)
62 #define ETHCON_ON BIT(15)
64 /* ETHCON2 Reg field */
65 #define ETHCON_RXBUFSZ 0x7f
66 #define ETHCON_RXBUFSZ_SHFT 0x4
68 /* ETHSTAT Reg field */
69 #define ETHSTAT_BUSY BIT(7)
70 #define ETHSTAT_BUFCNT 0x00ff0000
72 /* ETHRXFC Register fields */
73 #define ETHRXFC_BCEN BIT(0)
74 #define ETHRXFC_MCEN BIT(1)
75 #define ETHRXFC_UCEN BIT(3)
76 #define ETHRXFC_RUNTEN BIT(4)
77 #define ETHRXFC_CRCOKEN BIT(5)
79 /* EMAC1CFG1 register offset */
80 #define PIC32_EMAC1CFG1 0x0200
82 /* EMAC1CFG1 register fields */
83 #define EMAC_RXENABLE BIT(0)
84 #define EMAC_RXPAUSE BIT(2)
85 #define EMAC_TXPAUSE BIT(3)
86 #define EMAC_SOFTRESET BIT(15)
88 /* EMAC1CFG2 register fields */
89 #define EMAC_FULLDUP BIT(0)
90 #define EMAC_LENGTHCK BIT(1)
91 #define EMAC_CRCENABLE BIT(4)
92 #define EMAC_PADENABLE BIT(5)
93 #define EMAC_AUTOPAD BIT(7)
94 #define EMAC_EXCESS BIT(14)
96 /* EMAC1IPGT register magic */
97 #define FULLDUP_GAP_TIME 0x15
98 #define HALFDUP_GAP_TIME 0x12
100 /* EMAC1SUPP register fields */
101 #define EMAC_RMII_SPD100 BIT(8)
102 #define EMAC_RMII_RESET BIT(11)
104 /* MII Management Configuration Register */
105 #define MIIMCFG_RSTMGMT BIT(15)
106 #define MIIMCFG_CLKSEL_DIV40 0x0020 /* 100Mhz / 40 */
108 /* MII Management Command Register */
109 #define MIIMCMD_READ BIT(0)
110 #define MIIMCMD_SCAN BIT(1)
112 /* MII Management Address Register */
113 #define MIIMADD_REGADDR 0x1f
114 #define MIIMADD_REGADDR_SHIFT 0
115 #define MIIMADD_PHYADDR_SHIFT 8
117 /* MII Management Indicator Register */
118 #define MIIMIND_BUSY BIT(0)
119 #define MIIMIND_NOTVALID BIT(2)
120 #define MIIMIND_LINKFAIL BIT(3)
122 /* Packet Descriptor */
123 /* Received Packet Status */
124 #define _RSV1_PKT_CSUM 0xffff
125 #define _RSV2_CRC_ERR BIT(20)
126 #define _RSV2_LEN_ERR BIT(21)
127 #define _RSV2_RX_OK BIT(23)
128 #define _RSV2_RX_COUNT 0xffff
130 #define RSV_RX_CSUM(__rsv1) ((__rsv1) & _RSV1_PKT_CSUM)
131 #define RSV_RX_COUNT(__rsv2) ((__rsv2) & _RSV2_RX_COUNT)
132 #define RSV_RX_OK(__rsv2) ((__rsv2) & _RSV2_RX_OK)
133 #define RSV_CRC_ERR(__rsv2) ((__rsv2) & _RSV2_CRC_ERR)
135 /* Ethernet Hardware Descriptor Header bits */
136 #define EDH_EOWN BIT(7)
137 #define EDH_NPV BIT(8)
138 #define EDH_STICKY BIT(9)
139 #define _EDH_BCOUNT 0x07ff0000
140 #define EDH_EOP BIT(30)
141 #define EDH_SOP BIT(31)
142 #define EDH_BCOUNT_SHIFT 16
143 #define EDH_BCOUNT(len) ((len) << EDH_BCOUNT_SHIFT)
145 /* Ethernet Hardware Descriptors
146 * ref: PIC32 Family Reference Manual Table 35-7
147 * This structure represents the layout of the DMA
148 * memory shared between the CPU and the Ethernet
151 /* TX/RX DMA descriptor */
152 struct eth_dma_desc {
153 u32 hdr; /* header */
154 u32 data_buff; /* data buffer address */
155 u32 stat1; /* transmit/receive packet status */
156 u32 stat2; /* transmit/receive packet status */
157 u32 next_ed; /* next descriptor */
160 #define PIC32_MDIO_NAME "PIC32_EMAC"
162 int pic32_mdio_init(const char *name, ulong ioaddr);
164 #endif /* __MICROCHIP_PIC32_ETH_H_*/