net/can: add driver for mscan family & mpc52xx_mscan
Taken from socketcan-svn, fixed remaining todos, cleaned up, tested with a
phyCORE-MPC5200B-IO and a custom board.
Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
Cc: Wolfgang Grandegger <wg@grandegger.com>
Cc: Grant Likely <grant.likely@secretlab.ca>
Cc: David Miller <davem@davemloft.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/can/mscan/mscan.h b/drivers/net/can/mscan/mscan.h
new file mode 100644
index 0000000..57820f5
--- /dev/null
+++ b/drivers/net/can/mscan/mscan.h
@@ -0,0 +1,262 @@
+/*
+ * Definitions of consts/structs to drive the Freescale MSCAN.
+ *
+ * Copyright (C) 2005-2006 Andrey Volkov <avolkov@varma-el.com>,
+ * Varma Electronics Oy
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the version 2 of the GNU General Public License
+ * as published by the Free Software Foundation
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#ifndef __MSCAN_H__
+#define __MSCAN_H__
+
+#include <linux/types.h>
+
+/* MSCAN control register 0 (CANCTL0) bits */
+#define MSCAN_RXFRM 0x80
+#define MSCAN_RXACT 0x40
+#define MSCAN_CSWAI 0x20
+#define MSCAN_SYNCH 0x10
+#define MSCAN_TIME 0x08
+#define MSCAN_WUPE 0x04
+#define MSCAN_SLPRQ 0x02
+#define MSCAN_INITRQ 0x01
+
+/* MSCAN control register 1 (CANCTL1) bits */
+#define MSCAN_CANE 0x80
+#define MSCAN_CLKSRC 0x40
+#define MSCAN_LOOPB 0x20
+#define MSCAN_LISTEN 0x10
+#define MSCAN_WUPM 0x04
+#define MSCAN_SLPAK 0x02
+#define MSCAN_INITAK 0x01
+
+/* Use the MPC5200 MSCAN variant? */
+#ifdef CONFIG_PPC
+#define MSCAN_FOR_MPC5200
+#endif
+
+#ifdef MSCAN_FOR_MPC5200
+#define MSCAN_CLKSRC_BUS 0
+#define MSCAN_CLKSRC_XTAL MSCAN_CLKSRC
+#else
+#define MSCAN_CLKSRC_BUS MSCAN_CLKSRC
+#define MSCAN_CLKSRC_XTAL 0
+#endif
+
+/* MSCAN receiver flag register (CANRFLG) bits */
+#define MSCAN_WUPIF 0x80
+#define MSCAN_CSCIF 0x40
+#define MSCAN_RSTAT1 0x20
+#define MSCAN_RSTAT0 0x10
+#define MSCAN_TSTAT1 0x08
+#define MSCAN_TSTAT0 0x04
+#define MSCAN_OVRIF 0x02
+#define MSCAN_RXF 0x01
+#define MSCAN_ERR_IF (MSCAN_OVRIF | MSCAN_CSCIF)
+#define MSCAN_RSTAT_MSK (MSCAN_RSTAT1 | MSCAN_RSTAT0)
+#define MSCAN_TSTAT_MSK (MSCAN_TSTAT1 | MSCAN_TSTAT0)
+#define MSCAN_STAT_MSK (MSCAN_RSTAT_MSK | MSCAN_TSTAT_MSK)
+
+#define MSCAN_STATE_BUS_OFF (MSCAN_RSTAT1 | MSCAN_RSTAT0 | \
+ MSCAN_TSTAT1 | MSCAN_TSTAT0)
+#define MSCAN_STATE_TX(canrflg) (((canrflg)&MSCAN_TSTAT_MSK)>>2)
+#define MSCAN_STATE_RX(canrflg) (((canrflg)&MSCAN_RSTAT_MSK)>>4)
+#define MSCAN_STATE_ACTIVE 0
+#define MSCAN_STATE_WARNING 1
+#define MSCAN_STATE_PASSIVE 2
+#define MSCAN_STATE_BUSOFF 3
+
+/* MSCAN receiver interrupt enable register (CANRIER) bits */
+#define MSCAN_WUPIE 0x80
+#define MSCAN_CSCIE 0x40
+#define MSCAN_RSTATE1 0x20
+#define MSCAN_RSTATE0 0x10
+#define MSCAN_TSTATE1 0x08
+#define MSCAN_TSTATE0 0x04
+#define MSCAN_OVRIE 0x02
+#define MSCAN_RXFIE 0x01
+
+/* MSCAN transmitter flag register (CANTFLG) bits */
+#define MSCAN_TXE2 0x04
+#define MSCAN_TXE1 0x02
+#define MSCAN_TXE0 0x01
+#define MSCAN_TXE (MSCAN_TXE2 | MSCAN_TXE1 | MSCAN_TXE0)
+
+/* MSCAN transmitter interrupt enable register (CANTIER) bits */
+#define MSCAN_TXIE2 0x04
+#define MSCAN_TXIE1 0x02
+#define MSCAN_TXIE0 0x01
+#define MSCAN_TXIE (MSCAN_TXIE2 | MSCAN_TXIE1 | MSCAN_TXIE0)
+
+/* MSCAN transmitter message abort request (CANTARQ) bits */
+#define MSCAN_ABTRQ2 0x04
+#define MSCAN_ABTRQ1 0x02
+#define MSCAN_ABTRQ0 0x01
+
+/* MSCAN transmitter message abort ack (CANTAAK) bits */
+#define MSCAN_ABTAK2 0x04
+#define MSCAN_ABTAK1 0x02
+#define MSCAN_ABTAK0 0x01
+
+/* MSCAN transmit buffer selection (CANTBSEL) bits */
+#define MSCAN_TX2 0x04
+#define MSCAN_TX1 0x02
+#define MSCAN_TX0 0x01
+
+/* MSCAN ID acceptance control register (CANIDAC) bits */
+#define MSCAN_IDAM1 0x20
+#define MSCAN_IDAM0 0x10
+#define MSCAN_IDHIT2 0x04
+#define MSCAN_IDHIT1 0x02
+#define MSCAN_IDHIT0 0x01
+
+#define MSCAN_AF_32BIT 0x00
+#define MSCAN_AF_16BIT MSCAN_IDAM0
+#define MSCAN_AF_8BIT MSCAN_IDAM1
+#define MSCAN_AF_CLOSED (MSCAN_IDAM0|MSCAN_IDAM1)
+#define MSCAN_AF_MASK (~(MSCAN_IDAM0|MSCAN_IDAM1))
+
+/* MSCAN Miscellaneous Register (CANMISC) bits */
+#define MSCAN_BOHOLD 0x01
+
+#ifdef MSCAN_FOR_MPC5200
+#define _MSCAN_RESERVED_(n, num) u8 _res##n[num]
+#define _MSCAN_RESERVED_DSR_SIZE 2
+#else
+#define _MSCAN_RESERVED_(n, num)
+#define _MSCAN_RESERVED_DSR_SIZE 0
+#endif
+
+/* Structure of the hardware registers */
+struct mscan_regs {
+ /* (see doc S12MSCANV3/D) MPC5200 MSCAN */
+ u8 canctl0; /* + 0x00 0x00 */
+ u8 canctl1; /* + 0x01 0x01 */
+ _MSCAN_RESERVED_(1, 2); /* + 0x02 */
+ u8 canbtr0; /* + 0x04 0x02 */
+ u8 canbtr1; /* + 0x05 0x03 */
+ _MSCAN_RESERVED_(2, 2); /* + 0x06 */
+ u8 canrflg; /* + 0x08 0x04 */
+ u8 canrier; /* + 0x09 0x05 */
+ _MSCAN_RESERVED_(3, 2); /* + 0x0a */
+ u8 cantflg; /* + 0x0c 0x06 */
+ u8 cantier; /* + 0x0d 0x07 */
+ _MSCAN_RESERVED_(4, 2); /* + 0x0e */
+ u8 cantarq; /* + 0x10 0x08 */
+ u8 cantaak; /* + 0x11 0x09 */
+ _MSCAN_RESERVED_(5, 2); /* + 0x12 */
+ u8 cantbsel; /* + 0x14 0x0a */
+ u8 canidac; /* + 0x15 0x0b */
+ u8 reserved; /* + 0x16 0x0c */
+ _MSCAN_RESERVED_(6, 5); /* + 0x17 */
+#ifndef MSCAN_FOR_MPC5200
+ u8 canmisc; /* 0x0d */
+#endif
+ u8 canrxerr; /* + 0x1c 0x0e */
+ u8 cantxerr; /* + 0x1d 0x0f */
+ _MSCAN_RESERVED_(7, 2); /* + 0x1e */
+ u16 canidar1_0; /* + 0x20 0x10 */
+ _MSCAN_RESERVED_(8, 2); /* + 0x22 */
+ u16 canidar3_2; /* + 0x24 0x12 */
+ _MSCAN_RESERVED_(9, 2); /* + 0x26 */
+ u16 canidmr1_0; /* + 0x28 0x14 */
+ _MSCAN_RESERVED_(10, 2); /* + 0x2a */
+ u16 canidmr3_2; /* + 0x2c 0x16 */
+ _MSCAN_RESERVED_(11, 2); /* + 0x2e */
+ u16 canidar5_4; /* + 0x30 0x18 */
+ _MSCAN_RESERVED_(12, 2); /* + 0x32 */
+ u16 canidar7_6; /* + 0x34 0x1a */
+ _MSCAN_RESERVED_(13, 2); /* + 0x36 */
+ u16 canidmr5_4; /* + 0x38 0x1c */
+ _MSCAN_RESERVED_(14, 2); /* + 0x3a */
+ u16 canidmr7_6; /* + 0x3c 0x1e */
+ _MSCAN_RESERVED_(15, 2); /* + 0x3e */
+ struct {
+ u16 idr1_0; /* + 0x40 0x20 */
+ _MSCAN_RESERVED_(16, 2); /* + 0x42 */
+ u16 idr3_2; /* + 0x44 0x22 */
+ _MSCAN_RESERVED_(17, 2); /* + 0x46 */
+ u16 dsr1_0; /* + 0x48 0x24 */
+ _MSCAN_RESERVED_(18, 2); /* + 0x4a */
+ u16 dsr3_2; /* + 0x4c 0x26 */
+ _MSCAN_RESERVED_(19, 2); /* + 0x4e */
+ u16 dsr5_4; /* + 0x50 0x28 */
+ _MSCAN_RESERVED_(20, 2); /* + 0x52 */
+ u16 dsr7_6; /* + 0x54 0x2a */
+ _MSCAN_RESERVED_(21, 2); /* + 0x56 */
+ u8 dlr; /* + 0x58 0x2c */
+ u8:8; /* + 0x59 0x2d */
+ _MSCAN_RESERVED_(22, 2); /* + 0x5a */
+ u16 time; /* + 0x5c 0x2e */
+ } rx;
+ _MSCAN_RESERVED_(23, 2); /* + 0x5e */
+ struct {
+ u16 idr1_0; /* + 0x60 0x30 */
+ _MSCAN_RESERVED_(24, 2); /* + 0x62 */
+ u16 idr3_2; /* + 0x64 0x32 */
+ _MSCAN_RESERVED_(25, 2); /* + 0x66 */
+ u16 dsr1_0; /* + 0x68 0x34 */
+ _MSCAN_RESERVED_(26, 2); /* + 0x6a */
+ u16 dsr3_2; /* + 0x6c 0x36 */
+ _MSCAN_RESERVED_(27, 2); /* + 0x6e */
+ u16 dsr5_4; /* + 0x70 0x38 */
+ _MSCAN_RESERVED_(28, 2); /* + 0x72 */
+ u16 dsr7_6; /* + 0x74 0x3a */
+ _MSCAN_RESERVED_(29, 2); /* + 0x76 */
+ u8 dlr; /* + 0x78 0x3c */
+ u8 tbpr; /* + 0x79 0x3d */
+ _MSCAN_RESERVED_(30, 2); /* + 0x7a */
+ u16 time; /* + 0x7c 0x3e */
+ } tx;
+ _MSCAN_RESERVED_(31, 2); /* + 0x7e */
+} __attribute__ ((packed));
+
+#undef _MSCAN_RESERVED_
+#define MSCAN_REGION sizeof(struct mscan)
+
+#define TX_QUEUE_SIZE 3
+
+struct tx_queue_entry {
+ struct list_head list;
+ u8 mask;
+ u8 id;
+};
+
+struct mscan_priv {
+ struct can_priv can; /* must be the first member */
+ long open_time;
+ unsigned long flags;
+ void __iomem *reg_base; /* ioremap'ed address to registers */
+ u8 shadow_statflg;
+ u8 shadow_canrier;
+ u8 cur_pri;
+ u8 prev_buf_id;
+ u8 tx_active;
+
+ struct list_head tx_head;
+ struct tx_queue_entry tx_queue[TX_QUEUE_SIZE];
+ struct napi_struct napi;
+};
+
+struct net_device *alloc_mscandev(void);
+/*
+ * clock_src:
+ * 1 = The MSCAN clock source is the onchip Bus Clock.
+ * 0 = The MSCAN clock source is the chip Oscillator Clock.
+ */
+extern int register_mscandev(struct net_device *dev, int clock_src);
+extern void unregister_mscandev(struct net_device *dev);
+
+#endif /* __MSCAN_H__ */