net: add Faraday FTMAC110 10/100Mbps ethernet support

Faraday FTMAC110 10/100Mbps supports half-word data transfer for Linux.
However it has a weird DMA alignment issue:

(1) Tx DMA Buffer Address:
    1 bytes aligned: Invalid
    2 bytes aligned: O.K
    4 bytes aligned: O.K

(2) Rx DMA Buffer Address:
    1 bytes aligned: Invalid
    2 bytes aligned: O.K
    4 bytes aligned: Invalid!!!

Signed-off-by: Kuo-Jung Su <dantesu@faraday-tech.com>
Cc: Joe Hershberger <joe.hershberger@gmail.com>
Cc: Tom Rini <trini@ti.com>

1 files changed, 177 insertions, 0 deletions

diff --git a/drivers/net/ftmac110.h b/drivers/net/ftmac110.h
new file mode 100644
index 0000000..5b2d23b
--- /dev/null
+++ b/drivers/net/ftmac110.h
@@ -0,0 +1,177 @@
+/*
+ * Faraday 10/100Mbps Ethernet Controller
+ *
+ * (C) Copyright 2010 Faraday Technology
+ * Dante Su <dantesu@faraday-tech.com>
+ *
+ * This file is released under the terms of GPL v2 and any later version.
+ * See the file COPYING in the root directory of the source tree for details.
+ */
+
+#ifndef _FTMAC110_H
+#define _FTMAC110_H
+
+struct ftmac110_regs {
+	uint32_t isr;    /* 0x00: Interrups Status Register */
+	uint32_t imr;    /* 0x04: Interrupt Mask Register */
+	uint32_t mac[2]; /* 0x08: MAC Address */
+	uint32_t mht[2]; /* 0x10: Multicast Hash Table Register */
+	uint32_t txpd;   /* 0x18: Tx Poll Demand Register */
+	uint32_t rxpd;   /* 0x1c: Rx Poll Demand Register */
+	uint32_t txba;   /* 0x20: Tx Ring Base Address Register */
+	uint32_t rxba;   /* 0x24: Rx Ring Base Address Register */
+	uint32_t itc;    /* 0x28: Interrupt Timer Control Register */
+	uint32_t aptc;   /* 0x2C: Automatic Polling Timer Control Register */
+	uint32_t dblac;  /* 0x30: DMA Burst Length&Arbitration Control */
+	uint32_t revr;   /* 0x34: Revision Register */
+	uint32_t fear;   /* 0x38: Feature Register */
+	uint32_t rsvd[19];
+	uint32_t maccr;  /* 0x88: MAC Control Register */
+	uint32_t macsr;  /* 0x8C: MAC Status Register */
+	uint32_t phycr;  /* 0x90: PHY Control Register */
+	uint32_t phydr;  /* 0x94: PHY Data Register */
+	uint32_t fcr;    /* 0x98: Flow Control Register */
+	uint32_t bpr;    /* 0x9C: Back Pressure Register */
+};
+
+/*
+ * Interrupt status/mask register(ISR/IMR) bits
+ */
+#define ISR_ALL          0x3ff
+#define ISR_PHYSTCHG     (1 << 9) /* phy status change */
+#define ISR_AHBERR       (1 << 8) /* bus error */
+#define ISR_RXLOST       (1 << 7) /* rx lost */
+#define ISR_RXFIFO       (1 << 6) /* rx to fifo */
+#define ISR_TXLOST       (1 << 5) /* tx lost */
+#define ISR_TXOK         (1 << 4) /* tx to ethernet */
+#define ISR_NOTXBUF      (1 << 3) /* out of tx buffer */
+#define ISR_TXFIFO       (1 << 2) /* tx to fifo */
+#define ISR_NORXBUF      (1 << 1) /* out of rx buffer */
+#define ISR_RXOK         (1 << 0) /* rx to buffer */
+
+/*
+ * MACCR control bits
+ */
+#define MACCR_100M       (1 << 18) /* 100Mbps mode */
+#define MACCR_RXBCST     (1 << 17) /* rx broadcast packet */
+#define MACCR_RXMCST     (1 << 16) /* rx multicast packet */
+#define MACCR_FD         (1 << 15) /* full duplex */
+#define MACCR_CRCAPD     (1 << 14) /* tx crc append */
+#define MACCR_RXALL      (1 << 12) /* rx all packets */
+#define MACCR_RXFTL      (1 << 11) /* rx packet even it's > 1518 byte */
+#define MACCR_RXRUNT     (1 << 10) /* rx packet even it's < 64 byte */
+#define MACCR_RXMCSTHT   (1 << 9)  /* rx multicast hash table */
+#define MACCR_RXEN       (1 << 8)  /* rx enable */
+#define MACCR_RXINHDTX   (1 << 6)  /* rx in half duplex tx */
+#define MACCR_TXEN       (1 << 5)  /* tx enable */
+#define MACCR_CRCDIS     (1 << 4)  /* tx packet even it's crc error */
+#define MACCR_LOOPBACK   (1 << 3)  /* loop-back */
+#define MACCR_RESET      (1 << 2)  /* reset */
+#define MACCR_RXDMAEN    (1 << 1)  /* rx dma enable */
+#define MACCR_TXDMAEN    (1 << 0)  /* tx dma enable */
+
+/*
+ * PHYCR control bits
+ */
+#define PHYCR_READ       (1 << 26)
+#define PHYCR_WRITE      (1 << 27)
+#define PHYCR_REG_SHIFT  21
+#define PHYCR_ADDR_SHIFT 16
+
+/*
+ * ITC control bits
+ */
+
+/* Tx Cycle Length */
+#define ITC_TX_CYCLONG   (1 << 15) /* 100Mbps=81.92us; 10Mbps=819.2us */
+#define ITC_TX_CYCNORM   (0 << 15) /* 100Mbps=5.12us;  10Mbps=51.2us */
+/* Tx Threshold: Aggregate n interrupts as 1 interrupt */
+#define ITC_TX_THR(n)    (((n) & 0x7) << 12)
+/* Tx Interrupt Timeout = n * Tx Cycle */
+#define ITC_TX_ITMO(n)   (((n) & 0xf) << 8)
+/* Rx Cycle Length */
+#define ITC_RX_CYCLONG   (1 << 7)  /* 100Mbps=81.92us; 10Mbps=819.2us */
+#define ITC_RX_CYCNORM   (0 << 7)  /* 100Mbps=5.12us;  10Mbps=51.2us */
+/* Rx Threshold: Aggregate n interrupts as 1 interrupt */
+#define ITC_RX_THR(n)    (((n) & 0x7) << 4)
+/* Rx Interrupt Timeout = n * Rx Cycle */
+#define ITC_RX_ITMO(n)   (((n) & 0xf) << 0)
+
+#define ITC_DEFAULT \
+	(ITC_TX_THR(1) | ITC_TX_ITMO(0) | ITC_RX_THR(1) | ITC_RX_ITMO(0))
+
+/*
+ * APTC contrl bits
+ */
+
+/* Tx Cycle Length */
+#define APTC_TX_CYCLONG  (1 << 12) /* 100Mbps=81.92us; 10Mbps=819.2us */
+#define APTC_TX_CYCNORM  (0 << 12) /* 100Mbps=5.12us;  10Mbps=51.2us */
+/* Tx Poll Timeout = n * Tx Cycle, 0=No auto polling */
+#define APTC_TX_PTMO(n)  (((n) & 0xf) << 8)
+/* Rx Cycle Length */
+#define APTC_RX_CYCLONG  (1 << 4)  /* 100Mbps=81.92us; 10Mbps=819.2us */
+#define APTC_RX_CYCNORM  (0 << 4)  /* 100Mbps=5.12us;  10Mbps=51.2us */
+/* Rx Poll Timeout = n * Rx Cycle, 0=No auto polling */
+#define APTC_RX_PTMO(n)  (((n) & 0xf) << 0)
+
+#define APTC_DEFAULT     (APTC_TX_PTMO(0) | APTC_RX_PTMO(1))
+
+/*
+ * DBLAC contrl bits
+ */
+#define DBLAC_BURST_MAX_ANY  (0 << 14) /* un-limited */
+#define DBLAC_BURST_MAX_32X4 (2 << 14) /* max = 32 x 4 bytes */
+#define DBLAC_BURST_MAX_64X4 (3 << 14) /* max = 64 x 4 bytes */
+#define DBLAC_RXTHR_EN       (1 << 9)  /* enable rx threshold arbitration */
+#define DBLAC_RXTHR_HIGH(n)  (((n) & 0x7) << 6) /* upper bound = n/8 fifo */
+#define DBLAC_RXTHR_LOW(n)   (((n) & 0x7) << 3) /* lower bound = n/8 fifo */
+#define DBLAC_BURST_CAP16    (1 << 2)  /* support burst 16 */
+#define DBLAC_BURST_CAP8     (1 << 1)  /* support burst 8 */
+#define DBLAC_BURST_CAP4     (1 << 0)  /* support burst 4 */
+
+#define DBLAC_DEFAULT \
+	(DBLAC_RXTHR_EN | DBLAC_RXTHR_HIGH(6) | DBLAC_RXTHR_LOW(2))
+
+/*
+ * descriptor structure
+ */
+struct ftmac110_rxd {
+	uint32_t ct[2];
+	uint32_t buf;
+	void    *vbuf; /* reserved */
+};
+
+#define FTMAC110_RXCT0_OWNER       BIT_MASK(31) /* owner: 1=HW, 0=SW */
+#define FTMAC110_RXCT0_FRS         BIT_MASK(29) /* first pkt desc */
+#define FTMAC110_RXCT0_LRS         BIT_MASK(28) /* last pkt desc */
+#define FTMAC110_RXCT0_ODDNB       BIT_MASK(22) /* odd nibble */
+#define FTMAC110_RXCT0_RUNT        BIT_MASK(21) /* runt pkt */
+#define FTMAC110_RXCT0_FTL         BIT_MASK(20) /* frame too long */
+#define FTMAC110_RXCT0_CRC         BIT_MASK(19) /* pkt crc error */
+#define FTMAC110_RXCT0_ERR         BIT_MASK(18) /* bus error */
+#define FTMAC110_RXCT0_ERRMASK     (0x1f << 18) /* all errors */
+#define FTMAC110_RXCT0_BCST        BIT_MASK(17) /* Bcst pkt */
+#define FTMAC110_RXCT0_MCST        BIT_MASK(16) /* Mcst pkt */
+#define FTMAC110_RXCT0_LEN(x)      ((x) & 0x7ff)
+
+#define FTMAC110_RXCT1_END         BIT_MASK(31)
+#define FTMAC110_RXCT1_BUFSZ(x)    ((x) & 0x7ff)
+
+struct ftmac110_txd {
+	uint32_t ct[2];
+	uint32_t buf;
+	void    *vbuf; /* reserved */
+};
+
+#define FTMAC110_TXCT0_OWNER       BIT_MASK(31) /* owner: 1=HW, 0=SW */
+#define FTMAC110_TXCT0_COL         0x00000003   /* collision */
+
+#define FTMAC110_TXCT1_END         BIT_MASK(31) /* end of ring */
+#define FTMAC110_TXCT1_TXIC        BIT_MASK(30) /* tx done interrupt */
+#define FTMAC110_TXCT1_TX2FIC      BIT_MASK(29) /* tx fifo interrupt */
+#define FTMAC110_TXCT1_FTS         BIT_MASK(28) /* first pkt desc */
+#define FTMAC110_TXCT1_LTS         BIT_MASK(27) /* last pkt desc */
+#define FTMAC110_TXCT1_LEN(x)      ((x) & 0x7ff)
+
+#endif  /* FTMAC110_H */