1 /* 2 * Copyright(C) 2015 Linaro Limited. All rights reserved. 3 * Author: Mathieu Poirier <mathieu.poirier@linaro.org> 4 * 5 * This program is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 as published by 7 * the Free Software Foundation. 8 * 9 * This program is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 12 * more details. 13 * 14 * You should have received a copy of the GNU General Public License along with 15 * this program. If not, see <http://www.gnu.org/licenses/>. 16 */ 17 18 #ifndef _CORESIGHT_TMC_H 19 #define _CORESIGHT_TMC_H 20 21 #include <linux/miscdevice.h> 22 23 #define TMC_RSZ 0x004 24 #define TMC_STS 0x00c 25 #define TMC_RRD 0x010 26 #define TMC_RRP 0x014 27 #define TMC_RWP 0x018 28 #define TMC_TRG 0x01c 29 #define TMC_CTL 0x020 30 #define TMC_RWD 0x024 31 #define TMC_MODE 0x028 32 #define TMC_LBUFLEVEL 0x02c 33 #define TMC_CBUFLEVEL 0x030 34 #define TMC_BUFWM 0x034 35 #define TMC_RRPHI 0x038 36 #define TMC_RWPHI 0x03c 37 #define TMC_AXICTL 0x110 38 #define TMC_DBALO 0x118 39 #define TMC_DBAHI 0x11c 40 #define TMC_FFSR 0x300 41 #define TMC_FFCR 0x304 42 #define TMC_PSCR 0x308 43 #define TMC_ITMISCOP0 0xee0 44 #define TMC_ITTRFLIN 0xee8 45 #define TMC_ITATBDATA0 0xeec 46 #define TMC_ITATBCTR2 0xef0 47 #define TMC_ITATBCTR1 0xef4 48 #define TMC_ITATBCTR0 0xef8 49 50 /* register description */ 51 /* TMC_CTL - 0x020 */ 52 #define TMC_CTL_CAPT_EN BIT(0) 53 /* TMC_STS - 0x00C */ 54 #define TMC_STS_TMCREADY_BIT 2 55 #define TMC_STS_FULL BIT(0) 56 #define TMC_STS_TRIGGERED BIT(1) 57 /* TMC_AXICTL - 0x110 */ 58 #define TMC_AXICTL_PROT_CTL_B0 BIT(0) 59 #define TMC_AXICTL_PROT_CTL_B1 BIT(1) 60 #define TMC_AXICTL_SCT_GAT_MODE BIT(7) 61 #define TMC_AXICTL_WR_BURST_16 0xF00 62 /* TMC_FFCR - 0x304 */ 63 #define TMC_FFCR_FLUSHMAN_BIT 6 64 #define TMC_FFCR_EN_FMT BIT(0) 65 #define TMC_FFCR_EN_TI BIT(1) 66 #define TMC_FFCR_FON_FLIN BIT(4) 67 #define TMC_FFCR_FON_TRIG_EVT BIT(5) 68 #define TMC_FFCR_TRIGON_TRIGIN BIT(8) 69 #define TMC_FFCR_STOP_ON_FLUSH BIT(12) 70 71 72 enum tmc_config_type { 73 TMC_CONFIG_TYPE_ETB, 74 TMC_CONFIG_TYPE_ETR, 75 TMC_CONFIG_TYPE_ETF, 76 }; 77 78 enum tmc_mode { 79 TMC_MODE_CIRCULAR_BUFFER, 80 TMC_MODE_SOFTWARE_FIFO, 81 TMC_MODE_HARDWARE_FIFO, 82 }; 83 84 enum tmc_mem_intf_width { 85 TMC_MEM_INTF_WIDTH_32BITS = 1, 86 TMC_MEM_INTF_WIDTH_64BITS = 2, 87 TMC_MEM_INTF_WIDTH_128BITS = 4, 88 TMC_MEM_INTF_WIDTH_256BITS = 8, 89 }; 90 91 /** 92 * struct tmc_drvdata - specifics associated to an TMC component 93 * @base: memory mapped base address for this component. 94 * @dev: the device entity associated to this component. 95 * @csdev: component vitals needed by the framework. 96 * @miscdev: specifics to handle "/dev/xyz.tmc" entry. 97 * @spinlock: only one at a time pls. 98 * @buf: area of memory where trace data get sent. 99 * @paddr: DMA start location in RAM. 100 * @vaddr: virtual representation of @paddr. 101 * @size: trace buffer size. 102 * @len: size of the available trace. 103 * @mode: how this TMC is being used. 104 * @config_type: TMC variant, must be of type @tmc_config_type. 105 * @memwidth: width of the memory interface databus, in bytes. 106 * @trigger_cntr: amount of words to store after a trigger. 107 */ 108 struct tmc_drvdata { 109 void __iomem *base; 110 struct device *dev; 111 struct coresight_device *csdev; 112 struct miscdevice miscdev; 113 spinlock_t spinlock; 114 bool reading; 115 char *buf; 116 dma_addr_t paddr; 117 void __iomem *vaddr; 118 u32 size; 119 u32 len; 120 local_t mode; 121 enum tmc_config_type config_type; 122 enum tmc_mem_intf_width memwidth; 123 u32 trigger_cntr; 124 }; 125 126 /* Generic functions */ 127 void tmc_wait_for_tmcready(struct tmc_drvdata *drvdata); 128 void tmc_flush_and_stop(struct tmc_drvdata *drvdata); 129 void tmc_enable_hw(struct tmc_drvdata *drvdata); 130 void tmc_disable_hw(struct tmc_drvdata *drvdata); 131 132 /* ETB/ETF functions */ 133 int tmc_read_prepare_etb(struct tmc_drvdata *drvdata); 134 int tmc_read_unprepare_etb(struct tmc_drvdata *drvdata); 135 extern const struct coresight_ops tmc_etb_cs_ops; 136 extern const struct coresight_ops tmc_etf_cs_ops; 137 138 /* ETR functions */ 139 int tmc_read_prepare_etr(struct tmc_drvdata *drvdata); 140 int tmc_read_unprepare_etr(struct tmc_drvdata *drvdata); 141 extern const struct coresight_ops tmc_etr_cs_ops; 142 #endif 143