diff options
| -rw-r--r-- | arch/tile/gxio/Kconfig | 5 | ||||
| -rw-r--r-- | arch/tile/gxio/Makefile | 1 | ||||
| -rw-r--r-- | arch/tile/gxio/iorpc_uart.c | 77 | ||||
| -rw-r--r-- | arch/tile/gxio/uart.c | 87 | ||||
| -rw-r--r-- | arch/tile/include/arch/uart.h | 300 | ||||
| -rw-r--r-- | arch/tile/include/arch/uart_def.h | 120 | ||||
| -rw-r--r-- | arch/tile/include/gxio/iorpc_uart.h | 40 | ||||
| -rw-r--r-- | arch/tile/include/gxio/uart.h | 105 | ||||
| -rw-r--r-- | arch/tile/include/hv/drv_uart_intf.h | 33 |
9 files changed, 768 insertions, 0 deletions
diff --git a/arch/tile/gxio/Kconfig b/arch/tile/gxio/Kconfig index d221f8d6de8b..d4e10d58071b 100644 --- a/arch/tile/gxio/Kconfig +++ b/arch/tile/gxio/Kconfig @@ -26,3 +26,8 @@ config TILE_GXIO_TRIO config TILE_GXIO_USB_HOST bool select TILE_GXIO + +# Support direct access to the TILE-Gx UART hardware from kernel space. +config TILE_GXIO_UART + bool + select TILE_GXIO diff --git a/arch/tile/gxio/Makefile b/arch/tile/gxio/Makefile index 8684bcaa74ea..26ae2c727467 100644 --- a/arch/tile/gxio/Makefile +++ b/arch/tile/gxio/Makefile @@ -6,4 +6,5 @@ obj-$(CONFIG_TILE_GXIO) += iorpc_globals.o kiorpc.o obj-$(CONFIG_TILE_GXIO_DMA) += dma_queue.o obj-$(CONFIG_TILE_GXIO_MPIPE) += mpipe.o iorpc_mpipe.o iorpc_mpipe_info.o obj-$(CONFIG_TILE_GXIO_TRIO) += trio.o iorpc_trio.o +obj-$(CONFIG_TILE_GXIO_UART) += uart.o iorpc_uart.o obj-$(CONFIG_TILE_GXIO_USB_HOST) += usb_host.o iorpc_usb_host.o diff --git a/arch/tile/gxio/iorpc_uart.c b/arch/tile/gxio/iorpc_uart.c new file mode 100644 index 000000000000..b9a6d6193d73 --- /dev/null +++ b/arch/tile/gxio/iorpc_uart.c @@ -0,0 +1,77 @@ +/* + * Copyright 2013 Tilera Corporation. All Rights Reserved. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation, version 2. + * + * 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, GOOD TITLE or + * NON INFRINGEMENT. See the GNU General Public License for + * more details. + */ + +/* This file is machine-generated; DO NOT EDIT! */ +#include "gxio/iorpc_uart.h" + +struct cfg_interrupt_param { + union iorpc_interrupt interrupt; +}; + +int gxio_uart_cfg_interrupt(gxio_uart_context_t *context, int inter_x, + int inter_y, int inter_ipi, int inter_event) +{ + struct cfg_interrupt_param temp; + struct cfg_interrupt_param *params = &temp; + + params->interrupt.kernel.x = inter_x; + params->interrupt.kernel.y = inter_y; + params->interrupt.kernel.ipi = inter_ipi; + params->interrupt.kernel.event = inter_event; + + return hv_dev_pwrite(context->fd, 0, (HV_VirtAddr) params, + sizeof(*params), GXIO_UART_OP_CFG_INTERRUPT); +} + +EXPORT_SYMBOL(gxio_uart_cfg_interrupt); + +struct get_mmio_base_param { + HV_PTE base; +}; + +int gxio_uart_get_mmio_base(gxio_uart_context_t *context, HV_PTE *base) +{ + int __result; + struct get_mmio_base_param temp; + struct get_mmio_base_param *params = &temp; + + __result = + hv_dev_pread(context->fd, 0, (HV_VirtAddr) params, sizeof(*params), + GXIO_UART_OP_GET_MMIO_BASE); + *base = params->base; + + return __result; +} + +EXPORT_SYMBOL(gxio_uart_get_mmio_base); + +struct check_mmio_offset_param { + unsigned long offset; + unsigned long size; +}; + +int gxio_uart_check_mmio_offset(gxio_uart_context_t *context, + unsigned long offset, unsigned long size) +{ + struct check_mmio_offset_param temp; + struct check_mmio_offset_param *params = &temp; + + params->offset = offset; + params->size = size; + + return hv_dev_pwrite(context->fd, 0, (HV_VirtAddr) params, + sizeof(*params), GXIO_UART_OP_CHECK_MMIO_OFFSET); +} + +EXPORT_SYMBOL(gxio_uart_check_mmio_offset); diff --git a/arch/tile/gxio/uart.c b/arch/tile/gxio/uart.c new file mode 100644 index 000000000000..ba585175ef88 --- /dev/null +++ b/arch/tile/gxio/uart.c @@ -0,0 +1,87 @@ +/* + * Copyright 2013 Tilera Corporation. All Rights Reserved. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation, version 2. + * + * 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, GOOD TITLE or + * NON INFRINGEMENT. See the GNU General Public License for + * more details. + */ + +/* + * Implementation of UART gxio calls. + */ + +#include <linux/io.h> +#include <linux/errno.h> +#include <linux/module.h> + +#include <gxio/uart.h> +#include <gxio/iorpc_globals.h> +#include <gxio/iorpc_uart.h> +#include <gxio/kiorpc.h> + +int gxio_uart_init(gxio_uart_context_t *context, int uart_index) +{ + char file[32]; + int fd; + + snprintf(file, sizeof(file), "uart/%d/iorpc", uart_index); + fd = hv_dev_open((HV_VirtAddr) file, 0); + if (fd < 0) { + if (fd >= GXIO_ERR_MIN && fd <= GXIO_ERR_MAX) + return fd; + else + return -ENODEV; + } + + context->fd = fd; + + /* Map in the MMIO space. */ + context->mmio_base = (void __force *) + iorpc_ioremap(fd, HV_UART_MMIO_OFFSET, HV_UART_MMIO_SIZE); + + if (context->mmio_base == NULL) { + hv_dev_close(context->fd); + context->fd = -1; + return -ENODEV; + } + + return 0; +} + +EXPORT_SYMBOL_GPL(gxio_uart_init); + +int gxio_uart_destroy(gxio_uart_context_t *context) +{ + iounmap((void __force __iomem *)(context->mmio_base)); + hv_dev_close(context->fd); + + context->mmio_base = NULL; + context->fd = -1; + + return 0; +} + +EXPORT_SYMBOL_GPL(gxio_uart_destroy); + +/* UART register write wrapper. */ +void gxio_uart_write(gxio_uart_context_t *context, uint64_t offset, + uint64_t word) +{ + __gxio_mmio_write(context->mmio_base + offset, word); +} + +EXPORT_SYMBOL_GPL(gxio_uart_write); + +/* UART register read wrapper. */ +uint64_t gxio_uart_read(gxio_uart_context_t *context, uint64_t offset) +{ + return __gxio_mmio_read(context->mmio_base + offset); +} + +EXPORT_SYMBOL_GPL(gxio_uart_read); diff --git a/arch/tile/include/arch/uart.h b/arch/tile/include/arch/uart.h new file mode 100644 index 000000000000..07966970adad --- /dev/null +++ b/arch/tile/include/arch/uart.h @@ -0,0 +1,300 @@ +/* + * Copyright 2013 Tilera Corporation. All Rights Reserved. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation, version 2. + * + * 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, GOOD TITLE or + * NON INFRINGEMENT. See the GNU General Public License for + * more details. + */ + +/* Machine-generated file; do not edit. */ + +#ifndef __ARCH_UART_H__ +#define __ARCH_UART_H__ + +#include <arch/abi.h> +#include <arch/uart_def.h> + +#ifndef __ASSEMBLER__ + +/* Divisor. */ + +__extension__ +typedef union +{ + struct + { +#ifndef __BIG_ENDIAN__ + /* + * Baud Rate Divisor. Desired_baud_rate = REF_CLK frequency / (baud * + * 16). + * Note: REF_CLK is always 125 MHz, the default + * divisor = 68, baud rate = 125M/(68*16) = 115200 baud. + */ + uint_reg_t divisor : 12; + /* Reserved. */ + uint_reg_t __reserved : 52; +#else /* __BIG_ENDIAN__ */ + uint_reg_t __reserved : 52; + uint_reg_t divisor : 12; +#endif + }; + + uint_reg_t word; +} UART_DIVISOR_t; + +/* FIFO Count. */ + +__extension__ +typedef union +{ + struct + { +#ifndef __BIG_ENDIAN__ + /* + * n: n active entries in the receive FIFO (max is 2**8). Each entry has + * 8 bits. + * 0: no active entry in the receive FIFO (that is empty). + */ + uint_reg_t rfifo_count : 9; + /* Reserved. */ + uint_reg_t __reserved_0 : 7; + /* + * n: n active entries in the transmit FIFO (max is 2**8). Each entry has + * 8 bits. + * 0: no active entry in the transmit FIFO (that is empty). + */ + uint_reg_t tfifo_count : 9; + /* Reserved. */ + uint_reg_t __reserved_1 : 7; + /* + * n: n active entries in the write FIFO (max is 2**2). Each entry has 8 + * bits. + * 0: no active entry in the write FIFO (that is empty). + */ + uint_reg_t wfifo_count : 3; + /* Reserved. */ + uint_reg_t __reserved_2 : 29; +#else /* __BIG_ENDIAN__ */ + uint_reg_t __reserved_2 : 29; + uint_reg_t wfifo_count : 3; + uint_reg_t __reserved_1 : 7; + uint_reg_t tfifo_count : 9; + uint_reg_t __reserved_0 : 7; + uint_reg_t rfifo_count : 9; +#endif + }; + + uint_reg_t word; +} UART_FIFO_COUNT_t; + +/* FLAG. */ + +__extension__ +typedef union +{ + struct + { +#ifndef __BIG_ENDIAN__ + /* Reserved. */ + uint_reg_t __reserved_0 : 1; + /* 1: receive FIFO is empty */ + uint_reg_t rfifo_empty : 1; + /* 1: write FIFO is empty. */ + uint_reg_t wfifo_empty : 1; + /* 1: transmit FIFO is empty. */ + uint_reg_t tfifo_empty : 1; + /* 1: receive FIFO is full. */ + uint_reg_t rfifo_full : 1; + /* 1: write FIFO is full. */ + uint_reg_t wfifo_full : 1; + /* 1: transmit FIFO is full. */ + uint_reg_t tfifo_full : 1; + /* Reserved. */ + uint_reg_t __reserved_1 : 57; +#else /* __BIG_ENDIAN__ */ + uint_reg_t __reserved_1 : 57; + uint_reg_t tfifo_full : 1; + uint_reg_t wfifo_full : 1; + uint_reg_t rfifo_full : 1; + uint_reg_t tfifo_empty : 1; + uint_reg_t wfifo_empty : 1; + uint_reg_t rfifo_empty : 1; + uint_reg_t __reserved_0 : 1; +#endif + }; + + uint_reg_t word; +} UART_FLAG_t; + +/* + * Interrupt Vector Mask. + * Each bit in this register corresponds to a specific interrupt. When set, + * the associated interrupt will not be dispatched. + */ + +__extension__ +typedef union +{ + struct + { +#ifndef __BIG_ENDIAN__ + /* Read data FIFO read and no data available */ + uint_reg_t rdat_err : 1; + /* Write FIFO was written but it was full */ + uint_reg_t wdat_err : 1; + /* Stop bit not found when current data was received */ + uint_reg_t frame_err : 1; + /* Parity error was detected when current data was received */ + uint_reg_t parity_err : 1; + /* Data was received but the receive FIFO was full */ + uint_reg_t rfifo_overflow : 1; + /* + * An almost full event is reached when data is to be written to the + * receive FIFO, and the receive FIFO has more than or equal to + * BUFFER_THRESHOLD.RFIFO_AFULL bytes. + */ + uint_reg_t rfifo_afull : 1; + /* Reserved. */ + uint_reg_t __reserved_0 : 1; + /* An entry in the transmit FIFO was popped */ + uint_reg_t tfifo_re : 1; + /* An entry has been pushed into the receive FIFO */ + uint_reg_t rfifo_we : 1; + /* An entry of the write FIFO has been popped */ + uint_reg_t wfifo_re : 1; + /* Rshim read receive FIFO in protocol mode */ + uint_reg_t rfifo_err : 1; + /* + * An almost empty event is reached when data is to be read from the + * transmit FIFO, and the transmit FIFO has less than or equal to + * BUFFER_THRESHOLD.TFIFO_AEMPTY bytes. + */ + uint_reg_t tfifo_aempty : 1; + /* Reserved. */ + uint_reg_t __reserved_1 : 52; +#else /* __BIG_ENDIAN__ */ + uint_reg_t __reserved_1 : 52; + uint_reg_t tfifo_aempty : 1; + uint_reg_t rfifo_err : 1; + uint_reg_t wfifo_re : 1; + uint_reg_t rfifo_we : 1; + uint_reg_t tfifo_re : 1; + uint_reg_t __reserved_0 : 1; + uint_reg_t rfifo_afull : 1; + uint_reg_t rfifo_overflow : 1; + uint_reg_t parity_err : 1; + uint_reg_t frame_err : 1; + uint_reg_t wdat_err : 1; + uint_reg_t rdat_err : 1; +#endif + }; + + uint_reg_t word; +} UART_INTERRUPT_MASK_t; + +/* + * Interrupt vector, write-one-to-clear. + * Each bit in this register corresponds to a specific interrupt. Hardware + * sets the bit when the associated condition has occurred. Writing a 1 + * clears the status bit. + */ + +__extension__ +typedef union +{ + struct + { +#ifndef __BIG_ENDIAN__ + /* Read data FIFO read and no data available */ + uint_reg_t rdat_err : 1; + /* Write FIFO was written but it was full */ + uint_reg_t wdat_err : 1; + /* Stop bit not found when current data was received */ + uint_reg_t frame_err : 1; + /* Parity error was detected when current data was received */ + uint_reg_t parity_err : 1; + /* Data was received but the receive FIFO was full */ + uint_reg_t rfifo_overflow : 1; + /* + * Data was received and the receive FIFO is now almost full (more than + * BUFFER_THRESHOLD.RFIFO_AFULL bytes in it) + */ + uint_reg_t rfifo_afull : 1; + /* Reserved. */ + uint_reg_t __reserved_0 : 1; + /* An entry in the transmit FIFO was popped */ + uint_reg_t tfifo_re : 1; + /* An entry has been pushed into the receive FIFO */ + uint_reg_t rfifo_we : 1; + /* An entry of the write FIFO has been popped */ + uint_reg_t wfifo_re : 1; + /* Rshim read receive FIFO in protocol mode */ + uint_reg_t rfifo_err : 1; + /* + * Data was read from the transmit FIFO and now it is almost empty (less + * than or equal to BUFFER_THRESHOLD.TFIFO_AEMPTY bytes in it). + */ + uint_reg_t tfifo_aempty : 1; + /* Reserved. */ + uint_reg_t __reserved_1 : 52; +#else /* __BIG_ENDIAN__ */ + uint_reg_t __reserved_1 : 52; + uint_reg_t tfifo_aempty : 1; + uint_reg_t rfifo_err : 1; + uint_reg_t wfifo_re : 1; + uint_reg_t rfifo_we : 1; + uint_reg_t tfifo_re : 1; + uint_reg_t __reserved_0 : 1; + uint_reg_t rfifo_afull : 1; + uint_reg_t rfifo_overflow : 1; + uint_reg_t parity_err : 1; + uint_reg_t frame_err : 1; + uint_reg_t wdat_err : 1; + uint_reg_t rdat_err : 1; +#endif + }; + + uint_reg_t word; +} UART_INTERRUPT_STATUS_t; + +/* Type. */ + +__extension__ +typedef union +{ + struct + { +#ifndef __BIG_ENDIAN__ + /* Number of stop bits, rx and tx */ + uint_reg_t sbits : 1; + /* Reserved. */ + uint_reg_t __reserved_0 : 1; + /* Data word size, rx and tx */ + uint_reg_t dbits : 1; + /* Reserved. */ + uint_reg_t __reserved_1 : 1; + /* Parity selection, rx and tx */ + uint_reg_t ptype : 3; + /* Reserved. */ + uint_reg_t __reserved_2 : 57; +#else /* __BIG_ENDIAN__ */ + uint_reg_t __reserved_2 : 57; + uint_reg_t ptype : 3; + uint_reg_t __reserved_1 : 1; + uint_reg_t dbits : 1; + uint_reg_t __reserved_0 : 1; + uint_reg_t sbits : 1; +#endif + }; + + uint_reg_t word; +} UART_TYPE_t; +#endif /* !defined(__ASSEMBLER__) */ + +#endif /* !defined(__ARCH_UART_H__) */ diff --git a/arch/tile/include/arch/uart_def.h b/arch/tile/include/arch/uart_def.h new file mode 100644 index 000000000000..42bcaf535379 --- /dev/null +++ b/arch/tile/include/arch/uart_def.h @@ -0,0 +1,120 @@ +/* + * Copyright 2013 Tilera Corporation. All Rights Reserved. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation, version 2. + * + * 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, GOOD TITLE or + * NON INFRINGEMENT. See the GNU General Public License for + * more details. + */ + +/* Machine-generated file; do not edit. */ + +#ifndef __ARCH_UART_DEF_H__ +#define __ARCH_UART_DEF_H__ +#define UART_DIVISOR 0x0158 +#define UART_FIFO_COUNT 0x0110 +#define UART_FLAG 0x0108 +#define UART_INTERRUPT_MASK 0x0208 +#define UART_INTERRUPT_MASK__RDAT_ERR_SHIFT 0 +#define UART_INTERRUPT_MASK__RDAT_ERR_WIDTH 1 +#define UART_INTERRUPT_MASK__RDAT_ERR_RESET_VAL 1 +#define UART_INTERRUPT_MASK__RDAT_ERR_RMASK 0x1 +#define UART_INTERRUPT_MASK__RDAT_ERR_MASK 0x1 +#define UART_INTERRUPT_MASK__RDAT_ERR_FIELD 0,0 +#define UART_INTERRUPT_MASK__WDAT_ERR_SHIFT 1 +#define UART_INTERRUPT_MASK__WDAT_ERR_WIDTH 1 +#define UART_INTERRUPT_MASK__WDAT_ERR_RESET_VAL 1 +#define UART_INTERRUPT_MASK__WDAT_ERR_RMASK 0x1 +#define UART_INTERRUPT_MASK__WDAT_ERR_MASK 0x2 +#define UART_INTERRUPT_MASK__WDAT_ERR_FIELD 1,1 +#define UART_INTERRUPT_MASK__FRAME_ERR_SHIFT 2 +#define UART_INTERRUPT_MASK__FRAME_ERR_WIDTH 1 +#define UART_INTERRUPT_MASK__FRAME_ERR_RESET_VAL 1 +#define UART_INTERRUPT_MASK__FRAME_ERR_RMASK 0x1 +#define UART_INTERRUPT_MASK__FRAME_ERR_MASK 0x4 +#define UART_INTERRUPT_MASK__FRAME_ERR_FIELD 2,2 +#define UART_INTERRUPT_MASK__PARITY_ERR_SHIFT 3 +#define UART_INTERRUPT_MASK__PARITY_ERR_WIDTH 1 +#define UART_INTERRUPT_MASK__PARITY_ERR_RESET_VAL 1 +#define UART_INTERRUPT_MASK__PARITY_ERR_RMASK 0x1 +#define UART_INTERRUPT_MASK__PARITY_ERR_MASK 0x8 +#define UART_INTERRUPT_MASK__PARITY_ERR_FIELD 3,3 +#define UART_INTERRUPT_MASK__RFIFO_OVERFLOW_SHIFT 4 +#define UART_INTERRUPT_MASK__RFIFO_OVERFLOW_WIDTH 1 +#define UART_INTERRUPT_MASK__RFIFO_OVERFLOW_RESET_VAL 1 +#define UART_INTERRUPT_MASK__RFIFO_OVERFLOW_RMASK 0x1 +#define UART_INTERRUPT_MASK__RFIFO_OVERFLOW_MASK 0x10 +#define UART_INTERRUPT_MASK__RFIFO_OVERFLOW_FIELD 4,4 +#define UART_INTERRUPT_MASK__RFIFO_AFULL_SHIFT 5 +#define UART_INTERRUPT_MASK__RFIFO_AFULL_WIDTH 1 +#define UART_INTERRUPT_MASK__RFIFO_AFULL_RESET_VAL 1 +#define UART_INTERRUPT_MASK__RFIFO_AFULL_RMASK 0x1 +#define UART_INTERRUPT_MASK__RFIFO_AFULL_MASK 0x20 +#define UART_INTERRUPT_MASK__RFIFO_AFULL_FIELD 5,5 +#define UART_INTERRUPT_MASK__TFIFO_RE_SHIFT 7 +#define UART_INTERRUPT_MASK__TFIFO_RE_WIDTH 1 +#define UART_INTERRUPT_MASK__TFIFO_RE_RESET_VAL 1 +#define UART_INTERRUPT_MASK__TFIFO_RE_RMASK 0x1 +#define UART_INTERRUPT_MASK__TFIFO_RE_MASK 0x80 +#define UART_INTERRUPT_MASK__TFIFO_RE_FIELD 7,7 +#define UART_INTERRUPT_MASK__RFIFO_WE_SHIFT 8 +#define UART_INTERRUPT_MASK__RFIFO_WE_WIDTH 1 +#define UART_INTERRUPT_MASK__RFIFO_WE_RESET_VAL 1 +#define UART_INTERRUPT_MASK__RFIFO_WE_RMASK 0x1 +#define UART_INTERRUPT_MASK__RFIFO_WE_MASK 0x100 +#define UART_INTERRUPT_MASK__RFIFO_WE_FIELD 8,8 +#define UART_INTERRUPT_MASK__WFIFO_RE_SHIFT 9 +#define UART_INTERRUPT_MASK__WFIFO_RE_WIDTH 1 +#define UART_INTERRUPT_MASK__WFIFO_RE_RESET_VAL 1 +#define UART_INTERRUPT_MASK__WFIFO_RE_RMASK 0x1 +#define UART_INTERRUPT_MASK__WFIFO_RE_MASK 0x200 +#define UART_INTERRUPT_MASK__WFIFO_RE_FIELD 9,9 +#define UART_INTERRUPT_MASK__RFIFO_ERR_SHIFT 10 +#define UART_INTERRUPT_MASK__RFIFO_ERR_WIDTH 1 +#define UART_INTERRUPT_MASK__RFIFO_ERR_RESET_VAL 1 +#define UART_INTERRUPT_MASK__RFIFO_ERR_RMASK 0x1 +#define UART_INTERRUPT_MASK__RFIFO_ERR_MASK 0x400 +#define UART_INTERRUPT_MASK__RFIFO_ERR_FIELD 10,10 +#define UART_INTERRUPT_MASK__TFIFO_AEMPTY_SHIFT 11 +#define UART_INTERRUPT_MASK__TFIFO_AEMPTY_WIDTH 1 +#define UART_INTERRUPT_MASK__TFIFO_AEMPTY_RESET_VAL 1 +#define UART_INTERRUPT_MASK__TFIFO_AEMPTY_RMASK 0x1 +#define UART_INTERRUPT_MASK__TFIFO_AEMPTY_MASK 0x800 +#define UART_INTERRUPT_MASK__TFIFO_AEMPTY_FIELD 11,11 +#define UART_INTERRUPT_STATUS 0x0200 +#define UART_RECEIVE_DATA 0x0148 +#define UART_TRANSMIT_DATA 0x0140 +#define UART_TYPE 0x0160 +#define UART_TYPE__SBITS_SHIFT 0 +#define UART_TYPE__SBITS_WIDTH 1 +#define UART_TYPE__SBITS_RESET_VAL 1 +#define UART_TYPE__SBITS_RMASK 0x1 +#define UART_TYPE__SBITS_MASK 0x1 +#define UART_TYPE__SBITS_FIELD 0,0 +#define UART_TYPE__SBITS_VAL_ONE_SBITS 0x0 +#define UART_TYPE__SBITS_VAL_TWO_SBITS 0x1 +#define UART_TYPE__DBITS_SHIFT 2 +#define UART_TYPE__DBITS_WIDTH 1 +#define UART_TYPE__DBITS_RESET_VAL 0 +#define UART_TYPE__DBITS_RMASK 0x1 +#define UART_TYPE__DBITS_MASK 0x4 +#define UART_TYPE__DBITS_FIELD 2,2 +#define UART_TYPE__DBITS_VAL_EIGHT_DBITS 0x0 +#define UART_TYPE__DBITS_VAL_SEVEN_DBITS 0x1 +#define UART_TYPE__PTYPE_SHIFT 4 +#define UART_TYPE__PTYPE_WIDTH 3 +#define UART_TYPE__PTYPE_RESET_VAL 3 +#define UART_TYPE__PTYPE_RMASK 0x7 +#define UART_TYPE__PTYPE_MASK 0x70 +#define UART_TYPE__PTYPE_FIELD 4,6 +#define UART_TYPE__PTYPE_VAL_NONE 0x0 +#define UART_TYPE__PTYPE_VAL_MARK 0x1 +#define UART_TYPE__PTYPE_VAL_SPACE 0x2 +#define UART_TYPE__PTYPE_VAL_EVEN 0x3 +#define UART_TYPE__PTYPE_VAL_ODD 0x4 +#endif /* !defined(__ARCH_UART_DEF_H__) */ diff --git a/arch/tile/include/gxio/iorpc_uart.h b/arch/tile/include/gxio/iorpc_uart.h new file mode 100644 index 000000000000..55429d48ea56 --- /dev/null +++ b/arch/tile/include/gxio/iorpc_uart.h @@ -0,0 +1,40 @@ +/* + * Copyright 2013 Tilera Corporation. All Rights Reserved. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation, version 2. + * + * 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, GOOD TITLE or + * NON INFRINGEMENT. See the GNU General Public License for + * more details. + */ + +/* This file is machine-generated; DO NOT EDIT! */ +#ifndef __GXIO_UART_LINUX_RPC_H__ +#define __GXIO_UART_LINUX_RPC_H__ + +#include <hv/iorpc.h> + +#include <hv/drv_uart_intf.h> +#include <gxio/uart.h> +#include <gxio/kiorpc.h> +#include <linux/string.h> +#include <linux/module.h> +#include <asm/pgtable.h> + +#define GXIO_UART_OP_CFG_INTERRUPT IORPC_OPCODE(IORPC_FORMAT_KERNEL_INTERRUPT, 0x1900) +#define GXIO_UART_OP_GET_MMIO_BASE IORPC_OPCODE(IORPC_FORMAT_NONE_NOUSER, 0x8000) +#define GXIO_UART_OP_CHECK_MMIO_OFFSET IORPC_OPCODE(IORPC_FORMAT_NONE_NOUSER, 0x8001) + +int gxio_uart_cfg_interrupt(gxio_uart_context_t *context, int inter_x, + int inter_y, int inter_ipi, int inter_event); + +int gxio_uart_get_mmio_base(gxio_uart_context_t *context, HV_PTE *base); + +int gxio_uart_check_mmio_offset(gxio_uart_context_t *context, + unsigned long offset, unsigned long size); + +#endif /* !__GXIO_UART_LINUX_RPC_H__ */ diff --git a/arch/tile/include/gxio/uart.h b/arch/tile/include/gxio/uart.h new file mode 100644 index 000000000000..438ee7e46c7b --- /dev/null +++ b/arch/tile/include/gxio/uart.h @@ -0,0 +1,105 @@ +/* + * Copyright 2013 Tilera Corporation. All Rights Reserved. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation, version 2. + * + * 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, GOOD TITLE or + * NON INFRINGEMENT. See the GNU General Public License for + * more details. + */ + +#ifndef _GXIO_UART_H_ +#define _GXIO_UART_H_ + +#include "common.h" + +#include <hv/drv_uart_intf.h> +#include <hv/iorpc.h> + +/* + * + * An API for manipulating UART interface. + */ + +/* + * + * The Rshim allows access to the processor's UART interface. + */ + +/* A context object used to manage UART resources. */ +typedef struct { + + /* File descriptor for calling up to the hypervisor. */ + int fd; + + /* The VA at which our MMIO registers are mapped. */ + char *mmio_base; + +} gxio_uart_context_t; + +/* Request UART interrupts. + * + * Request that interrupts be delivered to a tile when the UART's + * Receive FIFO is written, or the Write FIFO is read. + * + * @param context Pointer to a properly initialized gxio_uart_context_t. + * @param bind_cpu_x X coordinate of CPU to which interrupt will be delivered. + * @param bind_cpu_y Y coordinate of CPU to which interrupt will be delivered. + * @param bind_interrupt IPI interrupt number. + * @param bind_event Sub-interrupt event bit number; a negative value can + * disable the interrupt. + * @return Zero if all of the requested UART events were successfully + * configured to interrupt. + */ +extern int gxio_uart_cfg_interrupt(gxio_uart_context_t *context, + int bind_cpu_x, + int bind_cpu_y, + int bind_interrupt, int bind_event); + +/* Initialize a UART context. + * + * A properly initialized context must be obtained before any of the other + * gxio_uart routines may be used. + * + * @param context Pointer to a gxio_uart_context_t, which will be initialized + * by this routine, if it succeeds. + * @param uart_index Index of the UART to use. + * @return Zero if the context was successfully initialized, else a + * GXIO_ERR_xxx error code. + */ +extern int gxio_uart_init(gxio_uart_context_t *context, int uart_index); + +/* Destroy a UART context. + * + * Once destroyed, a context may not be used with any gxio_uart routines + * other than gxio_uart_init(). After this routine returns, no further + * interrupts requested on this context will be delivered. The state and + * configuration of the pins which had been attached to this context are + * unchanged by this operation. + * + * @param context Pointer to a gxio_uart_context_t. + * @return Zero if the context was successfully destroyed, else a + * GXIO_ERR_xxx error code. + */ +extern int gxio_uart_destroy(gxio_uart_context_t *context); + +/* Write UART register. + * @param context Pointer to a gxio_uart_context_t. + * @param offset UART register offset. + * @param word Data will be wrote to UART reigister. + */ +extern void gxio_uart_write(gxio_uart_context_t *context, uint64_t offset, + uint64_t word); + +/* Read UART register. + * @param context Pointer to a gxio_uart_context_t. + * @param offset UART register offset. + * @return Data read from UART register. + */ +extern uint64_t gxio_uart_read(gxio_uart_context_t *context, uint64_t offset); + +#endif /* _GXIO_UART_H_ */ diff --git a/arch/tile/include/hv/drv_uart_intf.h b/arch/tile/include/hv/drv_uart_intf.h new file mode 100644 index 000000000000..f5379e2404fd --- /dev/null +++ b/arch/tile/include/hv/drv_uart_intf.h @@ -0,0 +1,33 @@ +/* + * Copyright 2013 Tilera Corporation. All Rights Reserved. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation, version 2. + * + * 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, GOOD TITLE or + * NON INFRINGEMENT. See the GNU General Public License for + * more details. + */ + +/** + * Interface definitions for the UART driver. + */ + +#ifndef _SYS_HV_DRV_UART_INTF_H +#define _SYS_HV_DRV_UART_INTF_H + +#include <arch/uart.h> + +/** Number of UART ports supported. */ +#define TILEGX_UART_NR 2 + +/** The mmap file offset (PA) of the UART MMIO region. */ +#define HV_UART_MMIO_OFFSET 0 + +/** The maximum size of the UARTs MMIO region (64K Bytes). */ +#define HV_UART_MMIO_SIZE (1UL << 16) + +#endif /* _SYS_HV_DRV_UART_INTF_H */ |