x86: Add Intel Quark X1000 I2C support
This patch adds the i2c.c, i2c.h and i2c-registers.h files, which support access to I2C controller configuration register through a function interface.
This commit is contained in:
Ricardo de Almeida Gonzaga
Jesus Sanchez-Palencia
parent
cc51f89b31
commit
a27af5b395
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@ -2,7 +2,7 @@ include $(CONTIKI)/cpu/x86/Makefile.x86_common
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CONTIKI_CPU_DIRS += drivers/legacy_pc drivers/quarkX1000 init/legacy_pc
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CONTIKI_SOURCEFILES += bootstrap_quarkX1000.S rtc.c pit.c pic.c irq.c nmi.c pci.c uart-16x50.c uart.c gpio.c
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CONTIKI_SOURCEFILES += bootstrap_quarkX1000.S rtc.c pit.c pic.c irq.c nmi.c pci.c uart-16x50.c uart.c gpio.c i2c.c
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CFLAGS += -m32 -march=i586 -mtune=i586
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LDFLAGS += -m32 -Xlinker -T -Xlinker $(CONTIKI)/cpu/x86/quarkX1000.ld
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156
cpu/x86/drivers/quarkX1000/i2c-registers.h
Normal file
156
cpu/x86/drivers/quarkX1000/i2c-registers.h
Normal file
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@ -0,0 +1,156 @@
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/*
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* Copyright (C) 2015, Intel Corporation. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* 3. Neither the name of the copyright holder nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef CPU_X86_DRIVERS_QUARKX1000_I2C_REGISTERS_H_
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#define CPU_X86_DRIVERS_QUARKX1000_I2C_REGISTERS_H_
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#define QUARKX1000_IC_CON 0x00
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#define QUARKX1000_IC_TAR 0x04
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#define QUARKX1000_IC_DATA_CMD 0x10
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#define QUARKX1000_IC_SS_SCL_HCNT 0x14
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#define QUARKX1000_IC_SS_SCL_LCNT 0x18
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#define QUARKX1000_IC_FS_SCL_HCNT 0x1C
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#define QUARKX1000_IC_FS_SCL_LCNT 0x20
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#define QUARKX1000_IC_INTR_STAT 0x2C
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#define QUARKX1000_IC_INTR_MASK 0x30
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#define QUARKX1000_IC_RAW_INTR_STAT 0x34
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#define QUARKX1000_IC_RX_TL 0x38
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#define QUARKX1000_IC_TX_TL 0x3C
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#define QUARKX1000_IC_CLR_INTR 0x40
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#define QUARKX1000_IC_CLR_RX_UNDER 0x44
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#define QUARKX1000_IC_CLR_RX_OVER 0x48
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#define QUARKX1000_IC_CLR_TX_OVER 0x4C
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#define QUARKX1000_IC_CLR_RD_REQ 0x50
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#define QUARKX1000_IC_CLR_TX_ABRT 0x54
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#define QUARKX1000_IC_CLR_ACTIVITY 0x5C
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#define QUARKX1000_IC_CLR_STOP_DET 0x60
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#define QUARKX1000_IC_CLR_START_DET 0x64
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#define QUARKX1000_IC_ENABLE 0x6C
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#define QUARKX1000_IC_STATUS 0x70
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#define QUARKX1000_IC_TXFLR 0x74
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#define QUARKX1000_IC_RXFLR 0x78
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#define QUARKX1000_IC_SDA_HOLD 0x7C
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#define QUARKX1000_IC_TX_ABRT_SOURCE 0x80
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#define QUARKX1000_IC_ENABLE_STATUS 0x9C
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#define QUARKX1000_IC_FS_SPKLEN 0xA0
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/* IC_CON */
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#define QUARKX1000_IC_CON_MASTER_MODE_SHIFT 0
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#define QUARKX1000_IC_CON_MASTER_MODE_MASK 0x01
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#define QUARKX1000_IC_CON_SPEED_SHIFT 1
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#define QUARKX1000_IC_CON_SPEED_MASK 0x06
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#define QUARKX1000_IC_CON_10BITADDR_MASTER_SHIFT 4
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#define QUARKX1000_IC_CON_10BITADDR_MASTER_MASK 0x10
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#define QUARKX1000_IC_CON_RESTART_EN_SHIFT 5
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#define QUARKX1000_IC_CON_RESTART_EN_MASK 0x20
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/* IC_TAR */
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#define QUARKX1000_IC_TAR_SHIFT 0
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#define QUARKX1000_IC_TAR_MASK 0x3FF
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/* IC_DATA_CMD */
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#define QUARKX1000_IC_DATA_CMD_DAT_SHIFT 0
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#define QUARKX1000_IC_DATA_CMD_DAT_MASK 0x0FF
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#define QUARKX1000_IC_DATA_CMD_CMD_SHIFT 8
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#define QUARKX1000_IC_DATA_CMD_CMD_MASK 0x100
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#define QUARKX1000_IC_DATA_CMD_STOP_SHIFT 9
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#define QUARKX1000_IC_DATA_CMD_STOP_MASK 0x200
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#define QUARKX1000_IC_DATA_CMD_RESTART_SHIFT 10
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#define QUARKX1000_IC_DATA_CMD_RESTART_MASK 0x400
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/* IC_SS_SCL_HCNT */
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#define QUARKX1000_IC_SS_SCL_HCNT_SHIFT 0
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#define QUARKX1000_IC_SS_SCL_HCNT_MASK 0xFFFF
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/* IC_SS_SCL_LCNT */
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#define QUARKX1000_IC_SS_SCL_LCNT_SHIFT 0
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#define QUARKX1000_IC_SS_SCL_LCNT_MASK 0xFFFF
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/* IC_FS_SCL_HCNT */
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#define QUARKX1000_IC_FS_SCL_HCNT_SHIFT 0
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#define QUARKX1000_IC_FS_SCL_HCNT_MASK 0xFFFF
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/* IC_FS_SCL_LCNT */
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#define QUARKX1000_IC_FS_SCL_LCNT_SHIFT 0
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#define QUARKX1000_IC_FS_SCL_LCNT_MASK 0xFFFF
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/* IC_INTR_STAT */
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#define QUARKX1000_IC_INTR_STAT_RX_UNDER_SHIFT 0
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#define QUARKX1000_IC_INTR_STAT_RX_UNDER_MASK 0x001
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#define QUARKX1000_IC_INTR_STAT_RX_OVER_SHIFT 1
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#define QUARKX1000_IC_INTR_STAT_RX_OVER_MASK 0x002
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#define QUARKX1000_IC_INTR_STAT_RX_FULL_SHIFT 2
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#define QUARKX1000_IC_INTR_STAT_RX_FULL_MASK 0x004
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#define QUARKX1000_IC_INTR_STAT_TX_OVER_SHIFT 3
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#define QUARKX1000_IC_INTR_STAT_TX_OVER_MASK 0x008
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#define QUARKX1000_IC_INTR_STAT_TX_EMPTY_SHIFT 4
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#define QUARKX1000_IC_INTR_STAT_TX_EMPTY_MASK 0x010
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#define QUARKX1000_IC_INTR_STAT_RD_REQ_SHIFT 5
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#define QUARKX1000_IC_INTR_STAT_RD_REQ_MASK 0x020
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#define QUARKX1000_IC_INTR_STAT_TX_ABRT_SHIFT 6
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#define QUARKX1000_IC_INTR_STAT_TX_ABRT_MASK 0x040
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#define QUARKX1000_IC_INTR_STAT_ACTIVITY_SHIFT 8
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#define QUARKX1000_IC_INTR_STAT_ACTIVITY_MASK 0x100
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#define QUARKX1000_IC_INTR_STAT_STOP_DET_SHIFT 9
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#define QUARKX1000_IC_INTR_STAT_STOP_DET_MASK 0x200
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#define QUARKX1000_IC_INTR_STAT_START_DET_SHIFT 10
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#define QUARKX1000_IC_INTR_STAT_START_DET_MASK 0x400
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/* IC_ENABLE */
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#define QUARKX1000_IC_ENABLE_SHIFT 0
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#define QUARKX1000_IC_ENABLE_MASK 0x01
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/* IC_STATUS */
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#define QUARKX1000_IC_STATUS_ACTIVITY_SHIFT 0
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#define QUARKX1000_IC_STATUS_ACTIVITY_MASK 0x01
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#define QUARKX1000_IC_STATUS_TFNF_SHIFT 1
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#define QUARKX1000_IC_STATUS_TFNF_MASK 0x02
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#define QUARKX1000_IC_STATUS_TFE_SHIFT 2
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#define QUARKX1000_IC_STATUS_TFE_MASK 0x04
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#define QUARKX1000_IC_STATUS_RFNE_SHIFT 3
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#define QUARKX1000_IC_STATUS_RFNE_MASK 0x08
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#define QUARKX1000_IC_STATUS_RFF_SHIFT 4
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#define QUARKX1000_IC_STATUS_RFF_MASK 0x10
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#define QUARKX1000_IC_STATUS_MST_ACTIVITY_SHIFT 5
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#define QUARKX1000_IC_STATUS_MST_ACTIVITY_MASK 0x20
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/* IC_TXFLR */
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#define QUARKX1000_IC_TXFLR_SHIFT 0
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#define QUARKX1000_IC_TXFLR_MASK 0x1F
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/* IC_RXFLR */
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#define QUARKX1000_IC_RXFLR_SHIFT 0
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#define QUARKX1000_IC_RXFLR_MASK 0x1F
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/* IC_FS_SPKLEN */
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#define QUARKX1000_IC_FS_SPKLEN_SHIFT 0
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#define QUARKX1000_IC_FS_SPKLEN_MASK 0xFF
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#endif /* CPU_X86_DRIVERS_QUARKX1000_I2C_REGISTERS_H_ */
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512
cpu/x86/drivers/quarkX1000/i2c.c
Normal file
512
cpu/x86/drivers/quarkX1000/i2c.c
Normal file
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@ -0,0 +1,512 @@
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/*
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* Copyright (C) 2015, Intel Corporation. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* 3. Neither the name of the copyright holder nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "contiki.h"
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#include "i2c.h"
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#include "i2c-registers.h"
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#include "interrupt.h"
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#include "pic.h"
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#define I2C_CLOCK_SPEED 25 /* kHz */
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#define I2C_FIFO_DEPTH 16
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#define I2C_STD_HCNT (I2C_CLOCK_SPEED * 4)
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#define I2C_STD_LCNT (I2C_CLOCK_SPEED * 5)
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#define I2C_FS_HCNT (I2C_CLOCK_SPEED)
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#define I2C_FS_LCNT (I2C_CLOCK_SPEED)
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#define I2C_FS_SPKLEN_LCNT_OFFSET 8
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#define I2C_FS_SPKLEN_HCNT_OFFSET 6
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#define I2C_POLLING_TIMEOUT (CLOCK_SECOND / 10)
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#define I2C_IRQ 9
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#define I2C_INT PIC_INT(I2C_IRQ)
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typedef enum {
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I2C_DIRECTION_READ,
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I2C_DIRECTION_WRITE
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} I2C_DIRECTION;
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struct i2c_internal_data {
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struct quarkX1000_i2c_config config;
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pci_driver_t pci;
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I2C_DIRECTION direction;
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uint8_t rx_len;
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uint8_t *rx_buffer;
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uint8_t tx_len;
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uint8_t *tx_buffer;
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uint8_t rx_tx_len;
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uint32_t hcnt;
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uint32_t lcnt;
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};
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static struct i2c_internal_data device;
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static uint32_t
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read(uint32_t base_addr, uint32_t offset)
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{
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return *(uint32_t*)(base_addr + offset);
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}
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static void
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write(uint32_t base_addr, uint32_t offset, uint32_t val)
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{
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*(uint32_t*)(base_addr + offset) = val;
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}
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static uint32_t
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get_value(uint32_t base_addr, uint32_t offset, uint32_t mask, uint32_t shift)
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{
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uint32_t register_value = *(uint32_t*)(base_addr + offset);
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register_value &= ~(0xFFFFFFFF - mask);
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return register_value >> shift;
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}
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static void
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set_value(uint32_t base_addr, uint32_t offset, uint32_t mask, uint32_t shift, uint32_t value)
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{
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volatile uint32_t *register_value = (volatile uint32_t*)(base_addr + offset);
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*register_value &= ~mask;
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*register_value |= value << shift;
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}
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static void
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i2c_data_read(void)
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{
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uint8_t i, rx_cnt;
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if (device.rx_len == 0)
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return;
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rx_cnt = get_value(device.pci.mmio, QUARKX1000_IC_RXFLR,
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QUARKX1000_IC_RXFLR_MASK, QUARKX1000_IC_RXFLR_SHIFT);
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if (rx_cnt > device.rx_len)
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rx_cnt = device.rx_len;
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for (i = 0; i < rx_cnt; i++) {
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device.rx_buffer[i] = get_value(device.pci.mmio, QUARKX1000_IC_DATA_CMD,
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QUARKX1000_IC_DATA_CMD_DAT_MASK, QUARKX1000_IC_DATA_CMD_DAT_SHIFT);
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}
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device.rx_buffer += i;
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device.rx_len -= i;
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}
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static void
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i2c_data_send(void)
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{
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uint32_t data = 0;
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uint8_t i, tx_cnt;
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if (device.rx_tx_len == 0)
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return;
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tx_cnt = I2C_FIFO_DEPTH - get_value(device.pci.mmio, QUARKX1000_IC_TXFLR,
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QUARKX1000_IC_TXFLR_MASK, QUARKX1000_IC_TXFLR_SHIFT);
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if (tx_cnt > device.rx_tx_len)
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tx_cnt = device.rx_tx_len;
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for (i = 0; i < tx_cnt; i++) {
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if (device.tx_len > 0) {
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data = device.tx_buffer[i];
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if (device.tx_len == 1)
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data |= (device.rx_len > 0) ? QUARKX1000_IC_DATA_CMD_RESTART_MASK : QUARKX1000_IC_DATA_CMD_STOP_MASK;
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device.tx_len -= 1;
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} else {
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data = QUARKX1000_IC_DATA_CMD_CMD_MASK;
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if (device.rx_tx_len == 1)
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data |= QUARKX1000_IC_DATA_CMD_STOP_MASK;
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}
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write(device.pci.mmio, QUARKX1000_IC_DATA_CMD, data);
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device.rx_tx_len -= 1;
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}
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device.tx_buffer += i;
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}
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static void
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i2c_isr(void)
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{
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if (read(device.pci.mmio, QUARKX1000_IC_INTR_STAT) & QUARKX1000_IC_INTR_STAT_STOP_DET_MASK) {
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i2c_data_read();
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write(device.pci.mmio, QUARKX1000_IC_INTR_MASK, 0);
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read(device.pci.mmio, QUARKX1000_IC_CLR_INTR);
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if (device.direction == I2C_DIRECTION_WRITE) {
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if (device.config.cb_tx)
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device.config.cb_tx();
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} else {
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if (device.config.cb_rx)
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device.config.cb_rx();
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}
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}
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if (read(device.pci.mmio, QUARKX1000_IC_INTR_STAT) & QUARKX1000_IC_INTR_STAT_TX_EMPTY_MASK) {
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i2c_data_send();
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if (device.rx_tx_len <= 0) {
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set_value(device.pci.mmio, QUARKX1000_IC_INTR_MASK,
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QUARKX1000_IC_INTR_STAT_TX_EMPTY_MASK, QUARKX1000_IC_INTR_STAT_TX_EMPTY_SHIFT, 0);
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set_value(device.pci.mmio, QUARKX1000_IC_INTR_MASK,
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QUARKX1000_IC_INTR_STAT_STOP_DET_MASK, QUARKX1000_IC_INTR_STAT_STOP_DET_SHIFT, 1);
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}
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}
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if (read(device.pci.mmio, QUARKX1000_IC_INTR_STAT) & QUARKX1000_IC_INTR_STAT_RX_FULL_MASK)
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i2c_data_read();
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if (read(device.pci.mmio, QUARKX1000_IC_INTR_STAT) & (QUARKX1000_IC_INTR_STAT_TX_ABRT_MASK
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| QUARKX1000_IC_INTR_STAT_TX_OVER_MASK | QUARKX1000_IC_INTR_STAT_RX_OVER_MASK
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| QUARKX1000_IC_INTR_STAT_RX_UNDER_MASK)) {
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write(device.pci.mmio, QUARKX1000_IC_INTR_MASK, 0);
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read(device.pci.mmio, QUARKX1000_IC_CLR_INTR);
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if (device.config.cb_err)
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device.config.cb_err();
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}
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}
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int
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quarkX1000_i2c_configure(struct quarkX1000_i2c_config *config)
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{
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uint32_t hcnt, lcnt;
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uint8_t ic_fs_spklen;
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device.config.speed = config->speed;
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device.config.addressing_mode = config->addressing_mode;
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device.config.cb_rx = config->cb_rx;
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device.config.cb_tx = config->cb_tx;
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device.config.cb_err = config->cb_err;
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|
||||
if (device.config.speed == QUARKX1000_I2C_SPEED_STANDARD) {
|
||||
lcnt = I2C_STD_LCNT;
|
||||
hcnt = I2C_STD_HCNT;
|
||||
} else {
|
||||
lcnt = I2C_FS_LCNT;
|
||||
hcnt = I2C_FS_HCNT;
|
||||
}
|
||||
|
||||
ic_fs_spklen = get_value(device.pci.mmio, QUARKX1000_IC_FS_SPKLEN,
|
||||
QUARKX1000_IC_FS_SPKLEN_MASK, QUARKX1000_IC_FS_SPKLEN_SHIFT);
|
||||
|
||||
/* We adjust the Low Count and High Count based on the Spike Suppression Limit */
|
||||
device.lcnt = (lcnt < (ic_fs_spklen + I2C_FS_SPKLEN_LCNT_OFFSET)) ? ic_fs_spklen + I2C_FS_SPKLEN_LCNT_OFFSET : lcnt;
|
||||
device.hcnt = (hcnt < (ic_fs_spklen + I2C_FS_SPKLEN_HCNT_OFFSET)) ? ic_fs_spklen + I2C_FS_SPKLEN_HCNT_OFFSET : hcnt;
|
||||
|
||||
/* Clear interrupts. */
|
||||
read(device.pci.mmio, QUARKX1000_IC_CLR_INTR);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int
|
||||
i2c_setup(void)
|
||||
{
|
||||
/* Clear all values */
|
||||
write(device.pci.mmio, QUARKX1000_IC_CON, 0);
|
||||
|
||||
/* Clear interrupts */
|
||||
read(device.pci.mmio, QUARKX1000_IC_CLR_INTR);
|
||||
|
||||
/* Quark X1000 SoC I2C only supports master mode. */
|
||||
set_value(device.pci.mmio, QUARKX1000_IC_CON,
|
||||
QUARKX1000_IC_CON_MASTER_MODE_MASK, QUARKX1000_IC_CON_MASTER_MODE_SHIFT, 1);
|
||||
|
||||
/* Set restart enable */
|
||||
set_value(device.pci.mmio, QUARKX1000_IC_CON,
|
||||
QUARKX1000_IC_CON_RESTART_EN_MASK, QUARKX1000_IC_CON_RESTART_EN_SHIFT, 1);
|
||||
|
||||
/* Set addressing mode */
|
||||
if (device.config.addressing_mode == QUARKX1000_I2C_ADDR_MODE_10BIT) {
|
||||
set_value(device.pci.mmio, QUARKX1000_IC_CON,
|
||||
QUARKX1000_IC_CON_10BITADDR_MASTER_MASK, QUARKX1000_IC_CON_10BITADDR_MASTER_SHIFT, 1);
|
||||
}
|
||||
|
||||
if (device.config.speed == QUARKX1000_I2C_SPEED_STANDARD) {
|
||||
set_value(device.pci.mmio, QUARKX1000_IC_SS_SCL_LCNT,
|
||||
QUARKX1000_IC_SS_SCL_LCNT_MASK, QUARKX1000_IC_SS_SCL_LCNT_SHIFT, device.lcnt);
|
||||
set_value(device.pci.mmio, QUARKX1000_IC_SS_SCL_HCNT,
|
||||
QUARKX1000_IC_SS_SCL_HCNT_MASK, QUARKX1000_IC_SS_SCL_HCNT_SHIFT, device.hcnt);
|
||||
set_value(device.pci.mmio, QUARKX1000_IC_CON,
|
||||
QUARKX1000_IC_CON_SPEED_MASK, QUARKX1000_IC_CON_SPEED_SHIFT, 0x1);
|
||||
} else {
|
||||
set_value(device.pci.mmio, QUARKX1000_IC_FS_SCL_LCNT,
|
||||
QUARKX1000_IC_FS_SCL_LCNT_MASK, QUARKX1000_IC_FS_SCL_LCNT_SHIFT, device.lcnt);
|
||||
set_value(device.pci.mmio, QUARKX1000_IC_FS_SCL_HCNT,
|
||||
QUARKX1000_IC_FS_SCL_HCNT_MASK, QUARKX1000_IC_FS_SCL_HCNT_SHIFT, device.hcnt);
|
||||
set_value(device.pci.mmio, QUARKX1000_IC_CON,
|
||||
QUARKX1000_IC_CON_SPEED_MASK, QUARKX1000_IC_CON_SPEED_SHIFT, 0x2);
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void
|
||||
i2c_operation_setup(uint8_t *write_buf, uint8_t write_len,
|
||||
uint8_t *read_buf, uint8_t read_len, uint16_t addr)
|
||||
{
|
||||
device.rx_len = read_len;
|
||||
device.rx_buffer = read_buf;
|
||||
device.tx_len = write_len;
|
||||
device.tx_buffer = write_buf;
|
||||
device.rx_tx_len = device.rx_len + device.tx_len;
|
||||
|
||||
/* Disable controller */
|
||||
set_value(device.pci.mmio, QUARKX1000_IC_ENABLE,
|
||||
QUARKX1000_IC_ENABLE_MASK, QUARKX1000_IC_ENABLE_SHIFT, 0);
|
||||
|
||||
i2c_setup();
|
||||
|
||||
/* Disable interrupts */
|
||||
write(device.pci.mmio, QUARKX1000_IC_INTR_MASK, 0);
|
||||
|
||||
/* Clear interrupts */
|
||||
read(device.pci.mmio, QUARKX1000_IC_CLR_INTR);
|
||||
|
||||
/* Set address of target slave */
|
||||
set_value(device.pci.mmio, QUARKX1000_IC_TAR,
|
||||
QUARKX1000_IC_TAR_MASK, QUARKX1000_IC_TAR_SHIFT, addr);
|
||||
}
|
||||
|
||||
/* This is an interrupt based operation */
|
||||
static int
|
||||
i2c_operation(uint8_t *write_buf, uint8_t write_len,
|
||||
uint8_t *read_buf, uint8_t read_len, uint16_t addr)
|
||||
{
|
||||
if (read(device.pci.mmio, QUARKX1000_IC_STATUS) & QUARKX1000_IC_STATUS_ACTIVITY_MASK)
|
||||
return -1;
|
||||
|
||||
i2c_operation_setup(write_buf, write_len, read_buf, read_len, addr);
|
||||
|
||||
/* Enable master TX and RX interrupts */
|
||||
set_value(device.pci.mmio, QUARKX1000_IC_INTR_MASK,
|
||||
QUARKX1000_IC_INTR_STAT_TX_OVER_MASK, QUARKX1000_IC_INTR_STAT_TX_OVER_SHIFT, 1);
|
||||
set_value(device.pci.mmio, QUARKX1000_IC_INTR_MASK,
|
||||
QUARKX1000_IC_INTR_STAT_TX_EMPTY_MASK, QUARKX1000_IC_INTR_STAT_TX_EMPTY_SHIFT, 1);
|
||||
set_value(device.pci.mmio, QUARKX1000_IC_INTR_MASK,
|
||||
QUARKX1000_IC_INTR_STAT_TX_ABRT_MASK, QUARKX1000_IC_INTR_STAT_TX_ABRT_SHIFT, 1);
|
||||
set_value(device.pci.mmio, QUARKX1000_IC_INTR_MASK,
|
||||
QUARKX1000_IC_INTR_STAT_RX_UNDER_MASK, QUARKX1000_IC_INTR_STAT_RX_UNDER_SHIFT, 1);
|
||||
set_value(device.pci.mmio, QUARKX1000_IC_INTR_MASK,
|
||||
QUARKX1000_IC_INTR_STAT_RX_OVER_MASK, QUARKX1000_IC_INTR_STAT_RX_OVER_SHIFT, 1);
|
||||
set_value(device.pci.mmio, QUARKX1000_IC_INTR_MASK,
|
||||
QUARKX1000_IC_INTR_STAT_RX_FULL_MASK, QUARKX1000_IC_INTR_STAT_RX_FULL_SHIFT, 1);
|
||||
set_value(device.pci.mmio, QUARKX1000_IC_INTR_MASK,
|
||||
QUARKX1000_IC_INTR_STAT_STOP_DET_MASK, QUARKX1000_IC_INTR_STAT_STOP_DET_SHIFT, 1);
|
||||
|
||||
/* Enable controller */
|
||||
set_value(device.pci.mmio, QUARKX1000_IC_ENABLE,
|
||||
QUARKX1000_IC_ENABLE_MASK, QUARKX1000_IC_ENABLE_SHIFT, 1);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* This is an interrupt based write */
|
||||
int
|
||||
quarkX1000_i2c_write(uint8_t *buf, uint8_t len, uint16_t addr)
|
||||
{
|
||||
device.direction = I2C_DIRECTION_WRITE;
|
||||
return i2c_operation(buf, len, 0, 0, addr);
|
||||
}
|
||||
|
||||
/* This is an interrupt based read */
|
||||
int
|
||||
quarkX1000_i2c_read(uint8_t *buf, uint8_t len, uint16_t addr)
|
||||
{
|
||||
device.direction = I2C_DIRECTION_READ;
|
||||
return i2c_operation(0, 0, buf, len, addr);
|
||||
}
|
||||
|
||||
static int
|
||||
i2c_polling_operation(uint8_t *write_buf, uint8_t write_len,
|
||||
uint8_t *read_buf, uint8_t read_len, uint16_t addr)
|
||||
{
|
||||
uint32_t start_time, intr_mask_stat;
|
||||
|
||||
if (!(read(device.pci.mmio, QUARKX1000_IC_CON) & QUARKX1000_IC_CON_MASTER_MODE_MASK))
|
||||
return -1;
|
||||
|
||||
/* Wait i2c idle */
|
||||
start_time = clock_seconds();
|
||||
while (read(device.pci.mmio, QUARKX1000_IC_STATUS) & QUARKX1000_IC_STATUS_ACTIVITY_MASK) {
|
||||
if ((clock_seconds() - start_time) > I2C_POLLING_TIMEOUT) {
|
||||
return -1;
|
||||
}
|
||||
}
|
||||
|
||||
/* Get interrupt mask to restore in the end of polling operation */
|
||||
intr_mask_stat = read(device.pci.mmio, QUARKX1000_IC_INTR_MASK);
|
||||
|
||||
i2c_operation_setup(write_buf, write_len, read_buf, read_len, addr);
|
||||
|
||||
/* Enable controller */
|
||||
set_value(device.pci.mmio, QUARKX1000_IC_ENABLE,
|
||||
QUARKX1000_IC_ENABLE_MASK, QUARKX1000_IC_ENABLE_SHIFT, 1);
|
||||
|
||||
/* Transmit */
|
||||
if (device.tx_len != 0) {
|
||||
while (device.tx_len > 0) {
|
||||
start_time = clock_seconds();
|
||||
while (!(read(device.pci.mmio, QUARKX1000_IC_STATUS) & QUARKX1000_IC_STATUS_TFNF_MASK)) {
|
||||
if ((clock_seconds() - start_time) > I2C_POLLING_TIMEOUT) {
|
||||
set_value(device.pci.mmio, QUARKX1000_IC_ENABLE,
|
||||
QUARKX1000_IC_ENABLE_MASK, QUARKX1000_IC_ENABLE_SHIFT, 0);
|
||||
return -1;
|
||||
}
|
||||
}
|
||||
i2c_data_send();
|
||||
}
|
||||
|
||||
start_time = clock_seconds();
|
||||
while (!(read(device.pci.mmio, QUARKX1000_IC_STATUS) & QUARKX1000_IC_STATUS_TFE_MASK)) {
|
||||
if ((clock_seconds() - start_time) > I2C_POLLING_TIMEOUT) {
|
||||
set_value(device.pci.mmio, QUARKX1000_IC_ENABLE,
|
||||
QUARKX1000_IC_ENABLE_MASK, QUARKX1000_IC_ENABLE_SHIFT, 0);
|
||||
return -1;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
i2c_data_send();
|
||||
|
||||
/* Receive */
|
||||
if (device.rx_len != 0) {
|
||||
while (device.rx_len > 0) {
|
||||
start_time = clock_seconds();
|
||||
while (!(read(device.pci.mmio, QUARKX1000_IC_STATUS) & QUARKX1000_IC_STATUS_RFNE_MASK)) {
|
||||
if ((clock_seconds() - start_time) > I2C_POLLING_TIMEOUT) {
|
||||
set_value(device.pci.mmio, QUARKX1000_IC_ENABLE,
|
||||
QUARKX1000_IC_ENABLE_MASK, QUARKX1000_IC_ENABLE_SHIFT, 0);
|
||||
return -1;
|
||||
}
|
||||
}
|
||||
i2c_data_read();
|
||||
}
|
||||
}
|
||||
|
||||
/* Stop Det */
|
||||
start_time = clock_seconds();
|
||||
while (!(read(device.pci.mmio, QUARKX1000_IC_RAW_INTR_STAT) & QUARKX1000_IC_INTR_STAT_STOP_DET_MASK)) {
|
||||
if ((clock_seconds() - start_time) > I2C_POLLING_TIMEOUT) {
|
||||
set_value(device.pci.mmio, QUARKX1000_IC_ENABLE,
|
||||
QUARKX1000_IC_ENABLE_MASK, QUARKX1000_IC_ENABLE_SHIFT, 0);
|
||||
return -1;
|
||||
}
|
||||
}
|
||||
read(device.pci.mmio, QUARKX1000_IC_CLR_STOP_DET);
|
||||
|
||||
/* Wait i2c idle */
|
||||
start_time = clock_seconds();
|
||||
while (read(device.pci.mmio, QUARKX1000_IC_STATUS) & QUARKX1000_IC_STATUS_ACTIVITY_MASK) {
|
||||
if ((clock_seconds() - start_time) > I2C_POLLING_TIMEOUT) {
|
||||
set_value(device.pci.mmio, QUARKX1000_IC_ENABLE,
|
||||
QUARKX1000_IC_ENABLE_MASK, QUARKX1000_IC_ENABLE_SHIFT, 0);
|
||||
return -1;
|
||||
}
|
||||
}
|
||||
|
||||
/* Disable controller */
|
||||
set_value(device.pci.mmio, QUARKX1000_IC_ENABLE,
|
||||
QUARKX1000_IC_ENABLE_MASK, QUARKX1000_IC_ENABLE_SHIFT, 0);
|
||||
|
||||
/* Restore interrupt mask */
|
||||
write(device.pci.mmio, QUARKX1000_IC_INTR_MASK, intr_mask_stat);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
int
|
||||
quarkX1000_i2c_polling_write(uint8_t *buf, uint8_t len, uint16_t addr)
|
||||
{
|
||||
device.direction = I2C_DIRECTION_WRITE;
|
||||
return i2c_polling_operation(buf, len, 0, 0, addr);
|
||||
}
|
||||
|
||||
int
|
||||
quarkX1000_i2c_polling_read(uint8_t *buf, uint8_t len, uint16_t addr)
|
||||
{
|
||||
device.direction = I2C_DIRECTION_READ;
|
||||
return i2c_polling_operation(0, 0, buf, len ,addr);
|
||||
}
|
||||
|
||||
int
|
||||
quarkX1000_i2c_is_available(void)
|
||||
{
|
||||
return device.pci.mmio ? 1 : 0;
|
||||
}
|
||||
|
||||
static void
|
||||
i2c_handler()
|
||||
{
|
||||
i2c_isr();
|
||||
|
||||
pic_eoi(I2C_IRQ);
|
||||
}
|
||||
|
||||
int
|
||||
quarkX1000_i2c_init(void)
|
||||
{
|
||||
pci_config_addr_t pci_addr;
|
||||
|
||||
pci_addr.raw = 0;
|
||||
pci_addr.bus = 0;
|
||||
pci_addr.dev = 21;
|
||||
pci_addr.func = 2;
|
||||
pci_addr.reg_off = PCI_CONFIG_REG_BAR0;
|
||||
|
||||
pci_command_enable(pci_addr, PCI_CMD_1_MEM_SPACE_EN);
|
||||
|
||||
SET_INTERRUPT_HANDLER(I2C_INT, 0, i2c_handler);
|
||||
|
||||
if (pci_irq_agent_set_pirq(IRQAGENT3, INTC, PIRQC) < 0)
|
||||
return -1;
|
||||
|
||||
pci_pirq_set_irq(PIRQC, I2C_IRQ, 1);
|
||||
|
||||
pci_init(&device.pci, pci_addr, 0);
|
||||
|
||||
pic_unmask_irq(I2C_IRQ);
|
||||
|
||||
return 0;
|
||||
}
|
||||
67
cpu/x86/drivers/quarkX1000/i2c.h
Normal file
67
cpu/x86/drivers/quarkX1000/i2c.h
Normal file
|
|
@ -0,0 +1,67 @@
|
|||
/*
|
||||
* Copyright (C) 2015, Intel Corporation. All rights reserved.
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted provided that the following conditions
|
||||
* are met:
|
||||
* 1. Redistributions of source code must retain the above copyright
|
||||
* notice, this list of conditions and the following disclaimer.
|
||||
* 2. Redistributions in binary form must reproduce the above copyright
|
||||
* notice, this list of conditions and the following disclaimer in the
|
||||
* documentation and/or other materials provided with the distribution.
|
||||
*
|
||||
* 3. Neither the name of the copyright holder nor the names of its
|
||||
* contributors may be used to endorse or promote products derived
|
||||
* from this software without specific prior written permission.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
||||
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
||||
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
|
||||
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
|
||||
* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
|
||||
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
|
||||
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
|
||||
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
||||
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
|
||||
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
||||
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
|
||||
* OF THE POSSIBILITY OF SUCH DAMAGE.
|
||||
*/
|
||||
|
||||
#ifndef CPU_X86_DRIVERS_QUARKX1000_I2C_H_
|
||||
#define CPU_X86_DRIVERS_QUARKX1000_I2C_H_
|
||||
|
||||
#include "pci.h"
|
||||
|
||||
typedef enum {
|
||||
QUARKX1000_I2C_SPEED_STANDARD,
|
||||
QUARKX1000_I2C_SPEED_FAST
|
||||
} QUARKX1000_I2C_SPEED;
|
||||
|
||||
typedef enum {
|
||||
QUARKX1000_I2C_ADDR_MODE_7BIT,
|
||||
QUARKX1000_I2C_ADDR_MODE_10BIT
|
||||
} QUARKX1000_I2C_ADDR_MODE;
|
||||
|
||||
typedef void (*quarkX1000_i2c_callback)(void);
|
||||
|
||||
struct quarkX1000_i2c_config {
|
||||
QUARKX1000_I2C_SPEED speed;
|
||||
QUARKX1000_I2C_ADDR_MODE addressing_mode;
|
||||
|
||||
quarkX1000_i2c_callback cb_rx;
|
||||
quarkX1000_i2c_callback cb_tx;
|
||||
quarkX1000_i2c_callback cb_err;
|
||||
};
|
||||
|
||||
int quarkX1000_i2c_init(void);
|
||||
int quarkX1000_i2c_configure(struct quarkX1000_i2c_config *config);
|
||||
int quarkX1000_i2c_is_available(void);
|
||||
|
||||
int quarkX1000_i2c_read(uint8_t *buf, uint8_t len, uint16_t addr);
|
||||
int quarkX1000_i2c_write(uint8_t *buf, uint8_t len, uint16_t addr);
|
||||
|
||||
int quarkX1000_i2c_polling_read(uint8_t *buf, uint8_t len, uint16_t addr);
|
||||
int quarkX1000_i2c_polling_write(uint8_t *buf, uint8_t len, uint16_t addr);
|
||||
|
||||
#endif /* CPU_X86_DRIVERS_QUARKX1000_I2C_H_ */
|
||||
Loading…
Reference in a new issue