2 * Register definitions for the Andes SPI Controller
4 * (C) Copyright 2011 Andes Technology
5 * Macpaul Lin <macpaul@andestech.com>
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License as
9 * published by the Free Software Foundation; either version 2 of
10 * the License, or (at your option) any later version.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
26 struct andes_spi_regs {
27 unsigned int apb; /* 0x00 - APB SPI interface setting */
28 unsigned int pio; /* 0x04 - PIO reg */
29 unsigned int cr; /* 0x08 - SPI Control reg */
30 unsigned int st; /* 0x0c - SPI Status reg */
31 unsigned int ie; /* 0x10 - Interrupt Enable reg */
32 unsigned int ist; /* 0x14 - Interrupt Status reg */
33 unsigned int dcr; /* 0x18 - data control reg */
34 unsigned int data; /* 0x1c - data register */
35 unsigned int ahb; /* 0x20 - AHB SPI interface setting */
36 unsigned int ver; /* 0x3c - SPI version reg */
39 #define BIT(x) (1 << (x))
41 /* 0x00 - APB SPI interface setting register */
42 #define ANDES_SPI_APB_BAUD(x) (((x) & 0xff) < 0)
43 #define ANDES_SPI_APB_CSHT(x) (((x) & 0xf) < 16)
44 #define ANDES_SPI_APB_SPNTS BIT(20) /* 0: normal, 1: delay */
45 #define ANDES_SPI_APB_CPHA BIT(24) /* 0: Sampling at odd edges */
46 #define ANDES_SPI_APB_CPOL BIT(25) /* 0: SCK low, 1: SCK high */
47 #define ANDES_SPI_APB_MSSL BIT(26) /* 0: SPI Master, 1: slave */
49 /* 0x04 - PIO register */
50 #define ANDES_SPI_PIO_MISO BIT(0) /* input value of pin MISO */
51 #define ANDES_SPI_PIO_MOSI BIT(1) /* I/O value of pin MOSI */
52 #define ANDES_SPI_PIO_SCK BIT(2) /* I/O value of pin SCK */
53 #define ANDES_SPI_PIO_CS BIT(3) /* I/O value of pin CS */
54 #define ANDES_SPI_PIO_PIOE BIT(4) /* Programming IO Enable */
56 /* 0x08 - SPI Control register */
57 #define ANDES_SPI_CR_SPIRST BIT(0) /* SPI mode reset */
58 #define ANDES_SPI_CR_RXFRST BIT(1) /* RxFIFO reset */
59 #define ANDES_SPI_CR_TXFRST BIT(2) /* TxFIFO reset */
60 #define ANDES_SPI_CR_RXFTH(x) (((x) & 0x1f) << 10) /* RxFIFO Threshold */
61 #define ANDES_SPI_CR_TXFTH(x) (((x) & 0x1f) << 18) /* TxFIFO Threshold */
63 /* 0x0c - SPI Status register */
64 #define ANDES_SPI_ST_SPIBSY BIT(0) /* SPI Transfer is active */
65 #define ANDES_SPI_ST_RXFEM BIT(8) /* RxFIFO Empty Flag */
66 #define ANDES_SPI_ST_RXFEL BIT(9) /* RxFIFO Full Flag */
67 #define ANDES_SPI_ST_RXFVE(x) (((x) >> 10) & 0x1f)
68 #define ANDES_SPI_ST_TXFEM BIT(16) /* TxFIFO Empty Flag */
69 #define ANDES_SPI_ST_TXFEL BIT(7) /* TxFIFO Full Flag */
70 #define ANDES_SPI_ST_TXFVE(x) (((x) >> 18) & 0x1f)
72 /* 0x10 - Interrupt Enable register */
73 #define ANDES_SPI_IE_RXFORIE BIT(0) /* RxFIFO overrun intr */
74 #define ANDES_SPI_IE_TXFURIE BIT(1) /* TxFOFO underrun intr */
75 #define ANDES_SPI_IE_RXFTHIE BIT(2) /* RxFIFO threshold intr */
76 #define ANDES_SPI_IE_TXFTHIE BIT(3) /* TxFIFO threshold intr */
77 #define ANDES_SPI_IE_SPIEIE BIT(4) /* SPI transmit END intr */
78 #define ANDES_SPI_IE_SPCFIE BIT(5) /* AHB/APB TxReq conflict */
80 /* 0x14 - Interrupt Status Register */
81 #define ANDES_SPI_IST_RXFORI BIT(0) /* has RxFIFO overrun */
82 #define ANDES_SPI_IST_TXFURI BIT(1) /* has TxFOFO underrun */
83 #define ANDES_SPI_IST_RXFTHI BIT(2) /* has RxFIFO threshold */
84 #define ANDES_SPI_IST_TXFTHI BIT(3) /* has TxFIFO threshold */
85 #define ANDES_SPI_IST_SPIEI BIT(4) /* has SPI transmit END */
86 #define ANDES_SPI_IST_SPCFI BIT(5) /* has AHB/APB TxReq conflict */
88 /* 0x18 - Data Control Register */
89 #define ANDES_SPI_DCR_RCNT(x) (((x) & 0x3ff) << 0)
90 #define ANDES_SPI_DCR_DYCNT(x) (((x) & 0x7) << 12)
91 #define ANDES_SPI_DCR_WCNT(x) (((x) & 0x3ff) << 16)
92 #define ANDES_SPI_DCR_TRAMODE(x) (((x) & 0x7) << 28)
93 #define ANDES_SPI_DCR_SPIT BIT(31) /* SPI bus trigger */
95 #define ANDES_SPI_DCR_MODE_WRCON ANDES_SPI_DCR_TRAMODE(0) /* w/r at the same time */
96 #define ANDES_SPI_DCR_MODE_WO ANDES_SPI_DCR_TRAMODE(1) /* write only */
97 #define ANDES_SPI_DCR_MODE_RO ANDES_SPI_DCR_TRAMODE(2) /* read only */
98 #define ANDES_SPI_DCR_MODE_WR ANDES_SPI_DCR_TRAMODE(3) /* write, read */
99 #define ANDES_SPI_DCR_MODE_RW ANDES_SPI_DCR_TRAMODE(4) /* read, write */
100 #define ANDES_SPI_DCR_MODE_WDR ANDES_SPI_DCR_TRAMODE(5) /* write, dummy, read */
101 #define ANDES_SPI_DCR_MODE_RDW ANDES_SPI_DCR_TRAMODE(6) /* read, dummy, write */
102 #define ANDES_SPI_DCR_MODE_RECEIVE ANDES_SPI_DCR_TRAMODE(7) /* receive */
104 /* 0x20 - AHB SPI interface setting register */
105 #define ANDES_SPI_AHB_BAUD(x) (((x) & 0xff) < 0)
106 #define ANDES_SPI_AHB_CSHT(x) (((x) & 0xf) < 16)
107 #define ANDES_SPI_AHB_SPNTS BIT(20) /* 0: normal, 1: delay */
108 #define ANDES_SPI_AHB_CPHA BIT(24) /* 0: Sampling at odd edges */
109 #define ANDES_SPI_AHB_CPOL BIT(25) /* 0: SCK low, 1: SCK high */
110 #define ANDES_SPI_AHB_MSSL BIT(26) /* only Master mode */
112 /* 0x3c - Version Register - (Year V.MAJOR.MINOR) */
113 #define ANDES_SPI_VER_MINOR(x) (((x) >> 0) & 0xf)
114 #define ANDES_SPI_VER_MAJOR(x) (((x) >> 8) & 0xf)
115 #define ANDES_SPI_VER_YEAR(x) (((x) >> 16) & 0xf)
117 struct andes_spi_slave {
118 struct spi_slave slave;
119 struct andes_spi_regs *regs;
123 static inline struct andes_spi_slave *to_andes_spi(struct spi_slave *slave)
125 return container_of(slave, struct andes_spi_slave, slave);
128 #endif /* __ANDES_SPI_H */