| /* Copyright (c) 2012-2013, The Linux Foundation. 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 version 2 and |
| * only version 2 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. |
| */ |
| |
| #include <linux/kernel.h> |
| #include <linux/module.h> |
| #include <linux/init.h> |
| #include <linux/types.h> |
| #include <linux/device.h> |
| #include <linux/platform_device.h> |
| #include <linux/io.h> |
| #include <linux/err.h> |
| #include <linux/fs.h> |
| #include <linux/miscdevice.h> |
| #include <linux/uaccess.h> |
| #include <linux/slab.h> |
| #include <linux/memory_alloc.h> |
| #include <linux/delay.h> |
| #include <linux/spinlock.h> |
| #include <linux/clk.h> |
| #include <linux/of.h> |
| #include <linux/of_coresight.h> |
| #include <linux/coresight.h> |
| #include <linux/usb/usb_qdss.h> |
| #include <mach/memory.h> |
| #include <mach/sps.h> |
| #include <mach/usb_bam.h> |
| #include <mach/msm_memory_dump.h> |
| |
| #include "coresight-priv.h" |
| |
| #define tmc_writel(drvdata, val, off) __raw_writel((val), drvdata->base + off) |
| #define tmc_readl(drvdata, off) __raw_readl(drvdata->base + off) |
| |
| #define TMC_LOCK(drvdata) \ |
| do { \ |
| mb(); \ |
| tmc_writel(drvdata, 0x0, CORESIGHT_LAR); \ |
| } while (0) |
| #define TMC_UNLOCK(drvdata) \ |
| do { \ |
| tmc_writel(drvdata, CORESIGHT_UNLOCK, CORESIGHT_LAR); \ |
| mb(); \ |
| } while (0) |
| |
| #define TMC_RSZ (0x004) |
| #define TMC_STS (0x00C) |
| #define TMC_RRD (0x010) |
| #define TMC_RRP (0x014) |
| #define TMC_RWP (0x018) |
| #define TMC_TRG (0x01C) |
| #define TMC_CTL (0x020) |
| #define TMC_RWD (0x024) |
| #define TMC_MODE (0x028) |
| #define TMC_LBUFLEVEL (0x02C) |
| #define TMC_CBUFLEVEL (0x030) |
| #define TMC_BUFWM (0x034) |
| #define TMC_RRPHI (0x038) |
| #define TMC_RWPHI (0x03C) |
| #define TMC_AXICTL (0x110) |
| #define TMC_DBALO (0x118) |
| #define TMC_DBAHI (0x11C) |
| #define TMC_FFSR (0x300) |
| #define TMC_FFCR (0x304) |
| #define TMC_PSCR (0x308) |
| #define TMC_ITMISCOP0 (0xEE0) |
| #define TMC_ITTRFLIN (0xEE8) |
| #define TMC_ITATBDATA0 (0xEEC) |
| #define TMC_ITATBCTR2 (0xEF0) |
| #define TMC_ITATBCTR1 (0xEF4) |
| #define TMC_ITATBCTR0 (0xEF8) |
| |
| #define BYTES_PER_WORD 4 |
| #define TMC_ETR_BAM_PIPE_INDEX 0 |
| #define TMC_ETR_BAM_NR_PIPES 2 |
| |
| #define TMC_ETFETB_DUMP_MAGIC_OFF (0) |
| #define TMC_ETFETB_DUMP_MAGIC (0x5D1DB1BF) |
| #define TMC_ETFETB_DUMP_VER_OFF (4) |
| #define TMC_ETFETB_DUMP_VER (1) |
| #define TMC_REG_DUMP_MAGIC_OFF (0) |
| #define TMC_REG_DUMP_MAGIC (0x5D1DB1BF) |
| #define TMC_REG_DUMP_VER_OFF (4) |
| #define TMC_REG_DUMP_VER (1) |
| |
| enum tmc_config_type { |
| TMC_CONFIG_TYPE_ETB, |
| TMC_CONFIG_TYPE_ETR, |
| TMC_CONFIG_TYPE_ETF, |
| }; |
| |
| enum tmc_mode { |
| TMC_MODE_CIRCULAR_BUFFER, |
| TMC_MODE_SOFTWARE_FIFO, |
| TMC_MODE_HARDWARE_FIFO, |
| }; |
| |
| enum tmc_etr_out_mode { |
| TMC_ETR_OUT_MODE_NONE, |
| TMC_ETR_OUT_MODE_MEM, |
| TMC_ETR_OUT_MODE_USB, |
| }; |
| |
| enum tmc_mem_intf_width { |
| TMC_MEM_INTF_WIDTH_32BITS = 0x2, |
| TMC_MEM_INTF_WIDTH_64BITS = 0x3, |
| TMC_MEM_INTF_WIDTH_128BITS = 0x4, |
| TMC_MEM_INTF_WIDTH_256BITS = 0x5, |
| }; |
| |
| struct tmc_etr_bam_data { |
| struct sps_bam_props props; |
| uint32_t handle; |
| struct sps_pipe *pipe; |
| struct sps_connect connect; |
| uint32_t src_pipe_idx; |
| uint32_t dest; |
| uint32_t dest_pipe_idx; |
| struct sps_mem_buffer desc_fifo; |
| struct sps_mem_buffer data_fifo; |
| bool enable; |
| }; |
| |
| struct tmc_drvdata { |
| void __iomem *base; |
| struct device *dev; |
| struct coresight_device *csdev; |
| struct miscdevice miscdev; |
| struct clk *clk; |
| spinlock_t spinlock; |
| struct mutex read_lock; |
| int read_count; |
| bool reading; |
| bool aborting; |
| char *reg_buf; |
| char *buf; |
| unsigned long paddr; |
| void __iomem *vaddr; |
| uint32_t size; |
| struct mutex usb_lock; |
| struct usb_qdss_ch *usbch; |
| struct tmc_etr_bam_data *bamdata; |
| enum tmc_etr_out_mode out_mode; |
| bool enable_to_bam; |
| bool enable; |
| enum tmc_config_type config_type; |
| uint32_t trigger_cntr; |
| }; |
| |
| static void tmc_wait_for_flush(struct tmc_drvdata *drvdata) |
| { |
| int count; |
| |
| /* Ensure no flush is in progress */ |
| for (count = TIMEOUT_US; BVAL(tmc_readl(drvdata, TMC_FFSR), 0) != 0 |
| && count > 0; count--) |
| udelay(1); |
| WARN(count == 0, "timeout while waiting for TMC flush, TMC_FFSR: %#x\n", |
| tmc_readl(drvdata, TMC_FFSR)); |
| } |
| |
| static void tmc_wait_for_ready(struct tmc_drvdata *drvdata) |
| { |
| int count; |
| |
| /* Ensure formatter, unformatter and hardware fifo are empty */ |
| for (count = TIMEOUT_US; BVAL(tmc_readl(drvdata, TMC_STS), 2) != 1 |
| && count > 0; count--) |
| udelay(1); |
| WARN(count == 0, "timeout while waiting for TMC ready, TMC_STS: %#x\n", |
| tmc_readl(drvdata, TMC_STS)); |
| } |
| |
| static void tmc_flush_and_stop(struct tmc_drvdata *drvdata) |
| { |
| int count; |
| uint32_t ffcr; |
| |
| ffcr = tmc_readl(drvdata, TMC_FFCR); |
| ffcr |= BIT(12); |
| tmc_writel(drvdata, ffcr, TMC_FFCR); |
| ffcr |= BIT(6); |
| tmc_writel(drvdata, ffcr, TMC_FFCR); |
| /* Ensure flush completes */ |
| for (count = TIMEOUT_US; BVAL(tmc_readl(drvdata, TMC_FFCR), 6) != 0 |
| && count > 0; count--) |
| udelay(1); |
| WARN(count == 0, "timeout while flushing TMC, TMC_FFCR: %#x\n", |
| tmc_readl(drvdata, TMC_FFCR)); |
| |
| tmc_wait_for_ready(drvdata); |
| } |
| |
| static void __tmc_enable(struct tmc_drvdata *drvdata) |
| { |
| tmc_writel(drvdata, 0x1, TMC_CTL); |
| } |
| |
| static void __tmc_disable(struct tmc_drvdata *drvdata) |
| { |
| tmc_writel(drvdata, 0x0, TMC_CTL); |
| } |
| |
| static void tmc_etr_fill_usb_bam_data(struct tmc_drvdata *drvdata) |
| { |
| struct tmc_etr_bam_data *bamdata = drvdata->bamdata; |
| |
| get_bam2bam_connection_info(0, PEER_PERIPHERAL_TO_USB, |
| &bamdata->dest, |
| &bamdata->dest_pipe_idx, |
| &bamdata->src_pipe_idx, |
| &bamdata->desc_fifo, |
| &bamdata->data_fifo); |
| } |
| |
| static void __tmc_etr_enable_to_bam(struct tmc_drvdata *drvdata) |
| { |
| struct tmc_etr_bam_data *bamdata = drvdata->bamdata; |
| uint32_t axictl; |
| |
| if (drvdata->enable_to_bam) |
| return; |
| |
| /* Configure and enable required CSR registers */ |
| msm_qdss_csr_enable_bam_to_usb(); |
| |
| /* Configure and enable ETR for usb bam output */ |
| |
| TMC_UNLOCK(drvdata); |
| |
| tmc_writel(drvdata, bamdata->data_fifo.size / BYTES_PER_WORD, |
| TMC_RSZ); |
| tmc_writel(drvdata, TMC_MODE_CIRCULAR_BUFFER, TMC_MODE); |
| |
| axictl = tmc_readl(drvdata, TMC_AXICTL); |
| axictl |= (0xF << 8); |
| tmc_writel(drvdata, axictl, TMC_AXICTL); |
| axictl &= ~(0x1 << 7); |
| tmc_writel(drvdata, axictl, TMC_AXICTL); |
| axictl = (axictl & ~0x3) | 0x2; |
| tmc_writel(drvdata, axictl, TMC_AXICTL); |
| |
| tmc_writel(drvdata, bamdata->data_fifo.phys_base, TMC_DBALO); |
| tmc_writel(drvdata, 0x0, TMC_DBAHI); |
| tmc_writel(drvdata, 0x103, TMC_FFCR); |
| tmc_writel(drvdata, drvdata->trigger_cntr, TMC_TRG); |
| __tmc_enable(drvdata); |
| |
| TMC_LOCK(drvdata); |
| |
| drvdata->enable_to_bam = true; |
| } |
| |
| static int tmc_etr_bam_enable(struct tmc_drvdata *drvdata) |
| { |
| struct tmc_etr_bam_data *bamdata = drvdata->bamdata; |
| int ret; |
| |
| if (bamdata->enable) |
| return 0; |
| |
| /* Reset bam to start with */ |
| ret = sps_device_reset(bamdata->handle); |
| if (ret) |
| goto err0; |
| |
| /* Now configure and enable bam */ |
| |
| bamdata->pipe = sps_alloc_endpoint(); |
| if (!bamdata->pipe) |
| return -ENOMEM; |
| |
| ret = sps_get_config(bamdata->pipe, &bamdata->connect); |
| if (ret) |
| goto err1; |
| |
| bamdata->connect.mode = SPS_MODE_SRC; |
| bamdata->connect.source = bamdata->handle; |
| bamdata->connect.event_thresh = 0x4; |
| bamdata->connect.src_pipe_index = TMC_ETR_BAM_PIPE_INDEX; |
| bamdata->connect.options = SPS_O_AUTO_ENABLE; |
| |
| bamdata->connect.destination = bamdata->dest; |
| bamdata->connect.dest_pipe_index = bamdata->dest_pipe_idx; |
| bamdata->connect.desc = bamdata->desc_fifo; |
| bamdata->connect.data = bamdata->data_fifo; |
| |
| ret = sps_connect(bamdata->pipe, &bamdata->connect); |
| if (ret) |
| goto err1; |
| |
| bamdata->enable = true; |
| return 0; |
| err1: |
| sps_free_endpoint(bamdata->pipe); |
| err0: |
| return ret; |
| } |
| |
| static void __tmc_etr_disable_to_bam(struct tmc_drvdata *drvdata) |
| { |
| if (!drvdata->enable_to_bam) |
| return; |
| |
| /* Ensure periodic flush is disabled in CSR block */ |
| msm_qdss_csr_disable_flush(); |
| |
| TMC_UNLOCK(drvdata); |
| |
| tmc_wait_for_flush(drvdata); |
| tmc_flush_and_stop(drvdata); |
| __tmc_disable(drvdata); |
| |
| TMC_LOCK(drvdata); |
| |
| /* Disable CSR configuration */ |
| msm_qdss_csr_disable_bam_to_usb(); |
| drvdata->enable_to_bam = false; |
| } |
| |
| static void tmc_etr_bam_disable(struct tmc_drvdata *drvdata) |
| { |
| struct tmc_etr_bam_data *bamdata = drvdata->bamdata; |
| |
| if (!bamdata->enable) |
| return; |
| |
| sps_disconnect(bamdata->pipe); |
| sps_free_endpoint(bamdata->pipe); |
| bamdata->enable = false; |
| } |
| |
| static void usb_notifier(void *priv, unsigned int event, |
| struct qdss_request *d_req, struct usb_qdss_ch *ch) |
| { |
| struct tmc_drvdata *drvdata = priv; |
| unsigned long flags; |
| int ret = 0; |
| |
| mutex_lock(&drvdata->usb_lock); |
| if (event == USB_QDSS_CONNECT) { |
| tmc_etr_fill_usb_bam_data(drvdata); |
| ret = tmc_etr_bam_enable(drvdata); |
| if (ret) |
| dev_err(drvdata->dev, "ETR BAM enable failed\n"); |
| |
| spin_lock_irqsave(&drvdata->spinlock, flags); |
| __tmc_etr_enable_to_bam(drvdata); |
| spin_unlock_irqrestore(&drvdata->spinlock, flags); |
| } else if (event == USB_QDSS_DISCONNECT) { |
| spin_lock_irqsave(&drvdata->spinlock, flags); |
| __tmc_etr_disable_to_bam(drvdata); |
| spin_unlock_irqrestore(&drvdata->spinlock, flags); |
| tmc_etr_bam_disable(drvdata); |
| } |
| mutex_unlock(&drvdata->usb_lock); |
| } |
| |
| static void __tmc_etb_enable(struct tmc_drvdata *drvdata) |
| { |
| /* Zero out the memory to help with debug */ |
| memset(drvdata->buf, 0, drvdata->size); |
| |
| TMC_UNLOCK(drvdata); |
| |
| tmc_writel(drvdata, TMC_MODE_CIRCULAR_BUFFER, TMC_MODE); |
| tmc_writel(drvdata, 0x133, TMC_FFCR); |
| tmc_writel(drvdata, drvdata->trigger_cntr, TMC_TRG); |
| __tmc_enable(drvdata); |
| |
| TMC_LOCK(drvdata); |
| } |
| |
| static void __tmc_etr_enable_to_mem(struct tmc_drvdata *drvdata) |
| { |
| uint32_t axictl; |
| |
| /* Zero out the memory to help with debug */ |
| memset(drvdata->vaddr, 0, drvdata->size); |
| |
| TMC_UNLOCK(drvdata); |
| |
| tmc_writel(drvdata, drvdata->size / BYTES_PER_WORD, TMC_RSZ); |
| tmc_writel(drvdata, TMC_MODE_CIRCULAR_BUFFER, TMC_MODE); |
| |
| axictl = tmc_readl(drvdata, TMC_AXICTL); |
| axictl |= (0xF << 8); |
| tmc_writel(drvdata, axictl, TMC_AXICTL); |
| axictl &= ~(0x1 << 7); |
| tmc_writel(drvdata, axictl, TMC_AXICTL); |
| axictl = (axictl & ~0x3) | 0x2; |
| tmc_writel(drvdata, axictl, TMC_AXICTL); |
| |
| tmc_writel(drvdata, drvdata->paddr, TMC_DBALO); |
| tmc_writel(drvdata, 0x0, TMC_DBAHI); |
| tmc_writel(drvdata, 0x133, TMC_FFCR); |
| tmc_writel(drvdata, drvdata->trigger_cntr, TMC_TRG); |
| __tmc_enable(drvdata); |
| |
| TMC_LOCK(drvdata); |
| } |
| |
| static void __tmc_etf_enable(struct tmc_drvdata *drvdata) |
| { |
| TMC_UNLOCK(drvdata); |
| |
| tmc_writel(drvdata, TMC_MODE_HARDWARE_FIFO, TMC_MODE); |
| tmc_writel(drvdata, 0x3, TMC_FFCR); |
| tmc_writel(drvdata, 0x0, TMC_BUFWM); |
| __tmc_enable(drvdata); |
| |
| TMC_LOCK(drvdata); |
| } |
| |
| static int tmc_enable(struct tmc_drvdata *drvdata, enum tmc_mode mode) |
| { |
| int ret; |
| unsigned long flags; |
| |
| ret = clk_prepare_enable(drvdata->clk); |
| if (ret) |
| return ret; |
| |
| mutex_lock(&drvdata->usb_lock); |
| if (drvdata->config_type == TMC_CONFIG_TYPE_ETR) { |
| if (drvdata->out_mode == TMC_ETR_OUT_MODE_USB) { |
| drvdata->usbch = usb_qdss_open("qdss", drvdata, |
| usb_notifier); |
| if (IS_ERR(drvdata->usbch)) { |
| dev_err(drvdata->dev, "usb_qdss_open failed\n"); |
| ret = PTR_ERR(drvdata->usbch); |
| goto err0; |
| } |
| } |
| } |
| |
| spin_lock_irqsave(&drvdata->spinlock, flags); |
| if (drvdata->reading) { |
| ret = -EBUSY; |
| goto err1; |
| } |
| |
| if (drvdata->config_type == TMC_CONFIG_TYPE_ETB) { |
| __tmc_etb_enable(drvdata); |
| } else if (drvdata->config_type == TMC_CONFIG_TYPE_ETR) { |
| if (drvdata->out_mode == TMC_ETR_OUT_MODE_MEM) |
| __tmc_etr_enable_to_mem(drvdata); |
| } else { |
| if (mode == TMC_MODE_CIRCULAR_BUFFER) |
| __tmc_etb_enable(drvdata); |
| else |
| __tmc_etf_enable(drvdata); |
| } |
| drvdata->enable = true; |
| spin_unlock_irqrestore(&drvdata->spinlock, flags); |
| mutex_unlock(&drvdata->usb_lock); |
| |
| dev_info(drvdata->dev, "TMC enabled\n"); |
| return 0; |
| err1: |
| spin_unlock_irqrestore(&drvdata->spinlock, flags); |
| if (drvdata->config_type == TMC_CONFIG_TYPE_ETR) |
| if (drvdata->out_mode == TMC_ETR_OUT_MODE_USB) |
| usb_qdss_close(drvdata->usbch); |
| err0: |
| mutex_unlock(&drvdata->usb_lock); |
| clk_disable_unprepare(drvdata->clk); |
| return ret; |
| } |
| |
| static int tmc_enable_sink(struct coresight_device *csdev) |
| { |
| struct tmc_drvdata *drvdata = dev_get_drvdata(csdev->dev.parent); |
| |
| return tmc_enable(drvdata, TMC_MODE_CIRCULAR_BUFFER); |
| } |
| |
| static int tmc_enable_link(struct coresight_device *csdev, int inport, |
| int outport) |
| { |
| struct tmc_drvdata *drvdata = dev_get_drvdata(csdev->dev.parent); |
| |
| return tmc_enable(drvdata, TMC_MODE_HARDWARE_FIFO); |
| } |
| |
| static void __tmc_reg_dump(struct tmc_drvdata *drvdata) |
| { |
| char *reg_hdr; |
| uint32_t *reg_buf; |
| |
| if (!drvdata->reg_buf || !drvdata->aborting) |
| return; |
| |
| reg_hdr = drvdata->reg_buf - PAGE_SIZE; |
| reg_buf = (uint32_t *)drvdata->reg_buf; |
| |
| reg_buf[1] = tmc_readl(drvdata, TMC_RSZ); |
| reg_buf[3] = tmc_readl(drvdata, TMC_STS); |
| reg_buf[5] = tmc_readl(drvdata, TMC_RRP); |
| reg_buf[6] = tmc_readl(drvdata, TMC_RWP); |
| reg_buf[7] = tmc_readl(drvdata, TMC_TRG); |
| reg_buf[8] = tmc_readl(drvdata, TMC_CTL); |
| reg_buf[10] = tmc_readl(drvdata, TMC_MODE); |
| reg_buf[11] = tmc_readl(drvdata, TMC_LBUFLEVEL); |
| reg_buf[12] = tmc_readl(drvdata, TMC_CBUFLEVEL); |
| reg_buf[13] = tmc_readl(drvdata, TMC_BUFWM); |
| if (drvdata->config_type == TMC_CONFIG_TYPE_ETR) { |
| reg_buf[14] = tmc_readl(drvdata, TMC_RRPHI); |
| reg_buf[15] = tmc_readl(drvdata, TMC_RWPHI); |
| reg_buf[68] = tmc_readl(drvdata, TMC_AXICTL); |
| reg_buf[70] = tmc_readl(drvdata, TMC_DBALO); |
| reg_buf[71] = tmc_readl(drvdata, TMC_DBAHI); |
| } |
| reg_buf[192] = tmc_readl(drvdata, TMC_FFSR); |
| reg_buf[193] = tmc_readl(drvdata, TMC_FFCR); |
| reg_buf[194] = tmc_readl(drvdata, TMC_PSCR); |
| reg_buf[1000] = tmc_readl(drvdata, CORESIGHT_CLAIMSET); |
| reg_buf[1001] = tmc_readl(drvdata, CORESIGHT_CLAIMCLR); |
| reg_buf[1005] = tmc_readl(drvdata, CORESIGHT_LSR); |
| reg_buf[1006] = tmc_readl(drvdata, CORESIGHT_AUTHSTATUS); |
| reg_buf[1010] = tmc_readl(drvdata, CORESIGHT_DEVID); |
| reg_buf[1011] = tmc_readl(drvdata, CORESIGHT_DEVTYPE); |
| reg_buf[1012] = tmc_readl(drvdata, CORESIGHT_PERIPHIDR4); |
| reg_buf[1013] = tmc_readl(drvdata, CORESIGHT_PERIPHIDR5); |
| reg_buf[1014] = tmc_readl(drvdata, CORESIGHT_PERIPHIDR6); |
| reg_buf[1015] = tmc_readl(drvdata, CORESIGHT_PERIPHIDR7); |
| reg_buf[1016] = tmc_readl(drvdata, CORESIGHT_PERIPHIDR0); |
| reg_buf[1017] = tmc_readl(drvdata, CORESIGHT_PERIPHIDR1); |
| reg_buf[1018] = tmc_readl(drvdata, CORESIGHT_PERIPHIDR2); |
| reg_buf[1019] = tmc_readl(drvdata, CORESIGHT_PERIPHIDR3); |
| reg_buf[1020] = tmc_readl(drvdata, CORESIGHT_COMPIDR0); |
| reg_buf[1021] = tmc_readl(drvdata, CORESIGHT_COMPIDR1); |
| reg_buf[1022] = tmc_readl(drvdata, CORESIGHT_COMPIDR2); |
| reg_buf[1023] = tmc_readl(drvdata, CORESIGHT_COMPIDR3); |
| |
| *(uint32_t *)(reg_hdr + TMC_REG_DUMP_MAGIC_OFF) = TMC_REG_DUMP_MAGIC; |
| } |
| |
| static void __tmc_etb_dump(struct tmc_drvdata *drvdata) |
| { |
| enum tmc_mem_intf_width memwidth; |
| uint8_t memwords; |
| char *hdr; |
| char *bufp; |
| uint32_t read_data; |
| int i; |
| |
| memwidth = BMVAL(tmc_readl(drvdata, CORESIGHT_DEVID), 8, 10); |
| if (memwidth == TMC_MEM_INTF_WIDTH_32BITS) |
| memwords = 1; |
| else if (memwidth == TMC_MEM_INTF_WIDTH_64BITS) |
| memwords = 2; |
| else if (memwidth == TMC_MEM_INTF_WIDTH_128BITS) |
| memwords = 4; |
| else |
| memwords = 8; |
| |
| bufp = drvdata->buf; |
| while (1) { |
| for (i = 0; i < memwords; i++) { |
| read_data = tmc_readl(drvdata, TMC_RRD); |
| if (read_data == 0xFFFFFFFF) |
| goto out; |
| memcpy(bufp, &read_data, BYTES_PER_WORD); |
| bufp += BYTES_PER_WORD; |
| } |
| } |
| |
| out: |
| if (drvdata->aborting) { |
| hdr = drvdata->buf - PAGE_SIZE; |
| *(uint32_t *)(hdr + TMC_ETFETB_DUMP_MAGIC_OFF) = |
| TMC_ETFETB_DUMP_MAGIC; |
| } |
| } |
| |
| static void __tmc_etb_disable(struct tmc_drvdata *drvdata) |
| { |
| TMC_UNLOCK(drvdata); |
| |
| tmc_flush_and_stop(drvdata); |
| __tmc_etb_dump(drvdata); |
| __tmc_reg_dump(drvdata); |
| __tmc_disable(drvdata); |
| |
| TMC_LOCK(drvdata); |
| } |
| |
| static void __tmc_etr_dump(struct tmc_drvdata *drvdata) |
| { |
| uint32_t rwp, rwphi; |
| |
| rwp = tmc_readl(drvdata, TMC_RWP); |
| rwphi = tmc_readl(drvdata, TMC_RWPHI); |
| |
| if (BVAL(tmc_readl(drvdata, TMC_STS), 0)) |
| drvdata->buf = drvdata->vaddr + rwp - drvdata->paddr; |
| else |
| drvdata->buf = drvdata->vaddr; |
| } |
| |
| static void __tmc_etr_disable_to_mem(struct tmc_drvdata *drvdata) |
| { |
| TMC_UNLOCK(drvdata); |
| |
| tmc_flush_and_stop(drvdata); |
| __tmc_etr_dump(drvdata); |
| __tmc_reg_dump(drvdata); |
| __tmc_disable(drvdata); |
| |
| TMC_LOCK(drvdata); |
| } |
| |
| static void __tmc_etf_disable(struct tmc_drvdata *drvdata) |
| { |
| TMC_UNLOCK(drvdata); |
| |
| tmc_flush_and_stop(drvdata); |
| __tmc_disable(drvdata); |
| |
| TMC_LOCK(drvdata); |
| } |
| |
| static void tmc_disable(struct tmc_drvdata *drvdata, enum tmc_mode mode) |
| { |
| unsigned long flags; |
| bool etr_bam_disable = false; |
| |
| mutex_lock(&drvdata->usb_lock); |
| spin_lock_irqsave(&drvdata->spinlock, flags); |
| if (drvdata->reading) |
| goto out; |
| |
| if (drvdata->config_type == TMC_CONFIG_TYPE_ETB) { |
| __tmc_etb_disable(drvdata); |
| } else if (drvdata->config_type == TMC_CONFIG_TYPE_ETR) { |
| if (drvdata->out_mode == TMC_ETR_OUT_MODE_MEM) |
| __tmc_etr_disable_to_mem(drvdata); |
| else if (drvdata->out_mode == TMC_ETR_OUT_MODE_USB) |
| etr_bam_disable = true; |
| } else { |
| if (mode == TMC_MODE_CIRCULAR_BUFFER) |
| __tmc_etb_disable(drvdata); |
| else |
| __tmc_etf_disable(drvdata); |
| } |
| out: |
| drvdata->enable = false; |
| spin_unlock_irqrestore(&drvdata->spinlock, flags); |
| |
| if (etr_bam_disable) { |
| if (drvdata->config_type == TMC_CONFIG_TYPE_ETR) { |
| if (drvdata->out_mode == TMC_ETR_OUT_MODE_USB) { |
| spin_lock_irqsave(&drvdata->spinlock, flags); |
| __tmc_etr_disable_to_bam(drvdata); |
| spin_unlock_irqrestore(&drvdata->spinlock, |
| flags); |
| tmc_etr_bam_disable(drvdata); |
| usb_qdss_close(drvdata->usbch); |
| } |
| } |
| } |
| mutex_unlock(&drvdata->usb_lock); |
| |
| clk_disable_unprepare(drvdata->clk); |
| |
| dev_info(drvdata->dev, "TMC disabled\n"); |
| } |
| |
| static void tmc_disable_sink(struct coresight_device *csdev) |
| { |
| struct tmc_drvdata *drvdata = dev_get_drvdata(csdev->dev.parent); |
| |
| tmc_disable(drvdata, TMC_MODE_CIRCULAR_BUFFER); |
| } |
| |
| static void tmc_disable_link(struct coresight_device *csdev, int inport, |
| int outport) |
| { |
| struct tmc_drvdata *drvdata = dev_get_drvdata(csdev->dev.parent); |
| |
| tmc_disable(drvdata, TMC_MODE_HARDWARE_FIFO); |
| } |
| |
| static void tmc_abort(struct coresight_device *csdev) |
| { |
| struct tmc_drvdata *drvdata = dev_get_drvdata(csdev->dev.parent); |
| unsigned long flags; |
| enum tmc_mode mode; |
| |
| drvdata->aborting = true; |
| |
| spin_lock_irqsave(&drvdata->spinlock, flags); |
| if (drvdata->reading) |
| goto out0; |
| |
| if (drvdata->config_type == TMC_CONFIG_TYPE_ETB) { |
| __tmc_etb_disable(drvdata); |
| } else if (drvdata->config_type == TMC_CONFIG_TYPE_ETR) { |
| if (drvdata->out_mode == TMC_ETR_OUT_MODE_MEM) |
| __tmc_etr_disable_to_mem(drvdata); |
| } else { |
| mode = tmc_readl(drvdata, TMC_MODE); |
| if (mode == TMC_MODE_CIRCULAR_BUFFER) |
| __tmc_etb_disable(drvdata); |
| else |
| goto out1; |
| } |
| out0: |
| drvdata->enable = false; |
| spin_unlock_irqrestore(&drvdata->spinlock, flags); |
| |
| dev_info(drvdata->dev, "TMC aborted\n"); |
| return; |
| out1: |
| spin_unlock_irqrestore(&drvdata->spinlock, flags); |
| } |
| |
| static const struct coresight_ops_sink tmc_sink_ops = { |
| .enable = tmc_enable_sink, |
| .disable = tmc_disable_sink, |
| .abort = tmc_abort, |
| }; |
| |
| static const struct coresight_ops_link tmc_link_ops = { |
| .enable = tmc_enable_link, |
| .disable = tmc_disable_link, |
| }; |
| |
| static const struct coresight_ops tmc_etb_cs_ops = { |
| .sink_ops = &tmc_sink_ops, |
| }; |
| |
| static const struct coresight_ops tmc_etr_cs_ops = { |
| .sink_ops = &tmc_sink_ops, |
| }; |
| |
| static const struct coresight_ops tmc_etf_cs_ops = { |
| .sink_ops = &tmc_sink_ops, |
| .link_ops = &tmc_link_ops, |
| }; |
| |
| static int tmc_read_prepare(struct tmc_drvdata *drvdata) |
| { |
| int ret; |
| unsigned long flags; |
| enum tmc_mode mode; |
| |
| spin_lock_irqsave(&drvdata->spinlock, flags); |
| if (!drvdata->enable) |
| goto out; |
| |
| if (drvdata->config_type == TMC_CONFIG_TYPE_ETB) { |
| __tmc_etb_disable(drvdata); |
| } else if (drvdata->config_type == TMC_CONFIG_TYPE_ETR) { |
| if (drvdata->out_mode == TMC_ETR_OUT_MODE_MEM) { |
| __tmc_etr_disable_to_mem(drvdata); |
| } else { |
| ret = -ENODEV; |
| goto err; |
| } |
| } else { |
| mode = tmc_readl(drvdata, TMC_MODE); |
| if (mode == TMC_MODE_CIRCULAR_BUFFER) { |
| __tmc_etb_disable(drvdata); |
| } else { |
| ret = -ENODEV; |
| goto err; |
| } |
| } |
| out: |
| drvdata->reading = true; |
| spin_unlock_irqrestore(&drvdata->spinlock, flags); |
| |
| dev_info(drvdata->dev, "TMC read start\n"); |
| return 0; |
| err: |
| spin_unlock_irqrestore(&drvdata->spinlock, flags); |
| return ret; |
| } |
| |
| static void tmc_read_unprepare(struct tmc_drvdata *drvdata) |
| { |
| unsigned long flags; |
| enum tmc_mode mode; |
| |
| spin_lock_irqsave(&drvdata->spinlock, flags); |
| if (!drvdata->enable) |
| goto out; |
| |
| if (drvdata->config_type == TMC_CONFIG_TYPE_ETB) { |
| __tmc_etb_enable(drvdata); |
| } else if (drvdata->config_type == TMC_CONFIG_TYPE_ETR) { |
| if (drvdata->out_mode == TMC_ETR_OUT_MODE_MEM) |
| __tmc_etr_enable_to_mem(drvdata); |
| } else { |
| mode = tmc_readl(drvdata, TMC_MODE); |
| if (mode == TMC_MODE_CIRCULAR_BUFFER) |
| __tmc_etb_enable(drvdata); |
| } |
| out: |
| drvdata->reading = false; |
| spin_unlock_irqrestore(&drvdata->spinlock, flags); |
| |
| dev_info(drvdata->dev, "TMC read end\n"); |
| } |
| |
| static int tmc_open(struct inode *inode, struct file *file) |
| { |
| struct tmc_drvdata *drvdata = container_of(file->private_data, |
| struct tmc_drvdata, miscdev); |
| int ret = 0; |
| |
| mutex_lock(&drvdata->read_lock); |
| if (drvdata->read_count++) |
| goto out; |
| |
| ret = tmc_read_prepare(drvdata); |
| if (ret) |
| goto err; |
| out: |
| mutex_unlock(&drvdata->read_lock); |
| nonseekable_open(inode, file); |
| |
| dev_dbg(drvdata->dev, "%s: successfully opened\n", __func__); |
| return 0; |
| err: |
| drvdata->read_count--; |
| mutex_unlock(&drvdata->read_lock); |
| return ret; |
| } |
| |
| static ssize_t tmc_read(struct file *file, char __user *data, size_t len, |
| loff_t *ppos) |
| { |
| struct tmc_drvdata *drvdata = container_of(file->private_data, |
| struct tmc_drvdata, miscdev); |
| char *bufp = drvdata->buf + *ppos; |
| |
| if (*ppos + len > drvdata->size) |
| len = drvdata->size - *ppos; |
| |
| if (drvdata->config_type == TMC_CONFIG_TYPE_ETR) { |
| if (bufp == (char *)(drvdata->vaddr + drvdata->size)) |
| bufp = drvdata->vaddr; |
| else if (bufp > (char *)(drvdata->vaddr + drvdata->size)) |
| bufp -= drvdata->size; |
| if ((bufp + len) > (char *)(drvdata->vaddr + drvdata->size)) |
| len = (char *)(drvdata->vaddr + drvdata->size) - bufp; |
| } |
| |
| if (copy_to_user(data, bufp, len)) { |
| dev_dbg(drvdata->dev, "%s: copy_to_user failed\n", __func__); |
| return -EFAULT; |
| } |
| |
| *ppos += len; |
| |
| dev_dbg(drvdata->dev, "%s: %d bytes copied, %d bytes left\n", |
| __func__, len, (int) (drvdata->size - *ppos)); |
| return len; |
| } |
| |
| static int tmc_release(struct inode *inode, struct file *file) |
| { |
| struct tmc_drvdata *drvdata = container_of(file->private_data, |
| struct tmc_drvdata, miscdev); |
| |
| mutex_lock(&drvdata->read_lock); |
| if (--drvdata->read_count) { |
| if (drvdata->read_count < 0) { |
| WARN_ONCE(1, "mismatched close\n"); |
| drvdata->read_count = 0; |
| } |
| goto out; |
| } |
| |
| tmc_read_unprepare(drvdata); |
| out: |
| mutex_unlock(&drvdata->read_lock); |
| dev_dbg(drvdata->dev, "%s: released\n", __func__); |
| return 0; |
| } |
| |
| static const struct file_operations tmc_fops = { |
| .owner = THIS_MODULE, |
| .open = tmc_open, |
| .read = tmc_read, |
| .release = tmc_release, |
| .llseek = no_llseek, |
| }; |
| |
| static ssize_t tmc_show_trigger_cntr(struct device *dev, |
| struct device_attribute *attr, char *buf) |
| { |
| struct tmc_drvdata *drvdata = dev_get_drvdata(dev->parent); |
| unsigned long val = drvdata->trigger_cntr; |
| |
| return scnprintf(buf, PAGE_SIZE, "%#lx\n", val); |
| } |
| |
| static ssize_t tmc_store_trigger_cntr(struct device *dev, |
| struct device_attribute *attr, |
| const char *buf, size_t size) |
| { |
| struct tmc_drvdata *drvdata = dev_get_drvdata(dev->parent); |
| unsigned long val; |
| |
| if (sscanf(buf, "%lx", &val) != 1) |
| return -EINVAL; |
| |
| drvdata->trigger_cntr = val; |
| return size; |
| } |
| static DEVICE_ATTR(trigger_cntr, S_IRUGO | S_IWUSR, tmc_show_trigger_cntr, |
| tmc_store_trigger_cntr); |
| |
| static ssize_t tmc_etr_show_out_mode(struct device *dev, |
| struct device_attribute *attr, char *buf) |
| { |
| struct tmc_drvdata *drvdata = dev_get_drvdata(dev->parent); |
| |
| return scnprintf(buf, PAGE_SIZE, "%s\n", |
| drvdata->out_mode == TMC_ETR_OUT_MODE_MEM ? |
| "mem" : "usb"); |
| } |
| |
| static ssize_t tmc_etr_store_out_mode(struct device *dev, |
| struct device_attribute *attr, |
| const char *buf, size_t size) |
| { |
| struct tmc_drvdata *drvdata = dev_get_drvdata(dev->parent); |
| char str[10] = ""; |
| unsigned long flags; |
| bool etr_bam_flag = false; |
| int ret; |
| |
| if (strlen(buf) >= 10) |
| return -EINVAL; |
| if (sscanf(buf, "%s", str) != 1) |
| return -EINVAL; |
| |
| mutex_lock(&drvdata->usb_lock); |
| if (!strcmp(str, "mem")) { |
| if (drvdata->out_mode == TMC_ETR_OUT_MODE_MEM) |
| goto out; |
| |
| spin_lock_irqsave(&drvdata->spinlock, flags); |
| if (drvdata->enable) { |
| __tmc_etr_disable_to_bam(drvdata); |
| __tmc_etr_enable_to_mem(drvdata); |
| etr_bam_flag = true; |
| } |
| drvdata->out_mode = TMC_ETR_OUT_MODE_MEM; |
| spin_unlock_irqrestore(&drvdata->spinlock, flags); |
| |
| if (etr_bam_flag) { |
| tmc_etr_bam_disable(drvdata); |
| usb_qdss_close(drvdata->usbch); |
| } |
| } else if (!strcmp(str, "usb")) { |
| if (drvdata->out_mode == TMC_ETR_OUT_MODE_USB) |
| goto out; |
| |
| spin_lock_irqsave(&drvdata->spinlock, flags); |
| if (drvdata->enable) { |
| if (drvdata->reading) { |
| ret = -EBUSY; |
| goto err1; |
| } |
| __tmc_etr_disable_to_mem(drvdata); |
| etr_bam_flag = true; |
| } |
| drvdata->out_mode = TMC_ETR_OUT_MODE_USB; |
| spin_unlock_irqrestore(&drvdata->spinlock, flags); |
| |
| if (etr_bam_flag) { |
| drvdata->usbch = usb_qdss_open("qdss", drvdata, |
| usb_notifier); |
| if (IS_ERR(drvdata->usbch)) { |
| dev_err(drvdata->dev, "usb_qdss_open failed\n"); |
| ret = PTR_ERR(drvdata->usbch); |
| goto err0; |
| } |
| } |
| } |
| out: |
| mutex_unlock(&drvdata->usb_lock); |
| return size; |
| err1: |
| spin_unlock_irqrestore(&drvdata->spinlock, flags); |
| err0: |
| mutex_unlock(&drvdata->usb_lock); |
| return ret; |
| } |
| static DEVICE_ATTR(out_mode, S_IRUGO | S_IWUSR, tmc_etr_show_out_mode, |
| tmc_etr_store_out_mode); |
| |
| static struct attribute *tmc_attrs[] = { |
| &dev_attr_trigger_cntr.attr, |
| NULL, |
| }; |
| |
| static struct attribute_group tmc_attr_grp = { |
| .attrs = tmc_attrs, |
| }; |
| |
| static struct attribute *tmc_etr_attrs[] = { |
| &dev_attr_out_mode.attr, |
| NULL, |
| }; |
| |
| static struct attribute_group tmc_etr_attr_grp = { |
| .attrs = tmc_etr_attrs, |
| }; |
| |
| static const struct attribute_group *tmc_etb_attr_grps[] = { |
| &tmc_attr_grp, |
| NULL, |
| }; |
| |
| static const struct attribute_group *tmc_etr_attr_grps[] = { |
| &tmc_attr_grp, |
| &tmc_etr_attr_grp, |
| NULL, |
| }; |
| |
| static const struct attribute_group *tmc_etf_attr_grps[] = { |
| &tmc_attr_grp, |
| NULL, |
| }; |
| |
| static int __devinit tmc_etr_bam_init(struct platform_device *pdev, |
| struct tmc_drvdata *drvdata) |
| { |
| struct device *dev = &pdev->dev; |
| struct resource *res; |
| struct tmc_etr_bam_data *bamdata; |
| |
| bamdata = devm_kzalloc(dev, sizeof(*bamdata), GFP_KERNEL); |
| if (!bamdata) |
| return -ENOMEM; |
| drvdata->bamdata = bamdata; |
| |
| res = platform_get_resource(pdev, IORESOURCE_MEM, 1); |
| if (!res) |
| return -ENODEV; |
| |
| bamdata->props.phys_addr = res->start; |
| bamdata->props.virt_addr = devm_ioremap(dev, res->start, |
| resource_size(res)); |
| if (!bamdata->props.virt_addr) |
| return -ENOMEM; |
| bamdata->props.virt_size = resource_size(res); |
| |
| bamdata->props.event_threshold = 0x4; /* Pipe event threshold */ |
| bamdata->props.summing_threshold = 0x10; /* BAM event threshold */ |
| bamdata->props.irq = 0; |
| bamdata->props.num_pipes = TMC_ETR_BAM_NR_PIPES; |
| |
| return sps_register_bam_device(&bamdata->props, &bamdata->handle); |
| } |
| |
| static void tmc_etr_bam_exit(struct tmc_drvdata *drvdata) |
| { |
| struct tmc_etr_bam_data *bamdata = drvdata->bamdata; |
| |
| if (!bamdata->handle) |
| return; |
| sps_deregister_bam_device(bamdata->handle); |
| } |
| |
| static int __devinit tmc_probe(struct platform_device *pdev) |
| { |
| int ret; |
| uint32_t devid; |
| struct device *dev = &pdev->dev; |
| struct coresight_platform_data *pdata; |
| struct tmc_drvdata *drvdata; |
| struct resource *res; |
| uint32_t reg_size; |
| static int etfetb_count; |
| static int count; |
| void *baddr; |
| struct msm_client_dump dump; |
| struct coresight_desc *desc; |
| |
| if (pdev->dev.of_node) { |
| pdata = of_get_coresight_platform_data(dev, pdev->dev.of_node); |
| if (IS_ERR(pdata)) |
| return PTR_ERR(pdata); |
| pdev->dev.platform_data = pdata; |
| } |
| |
| drvdata = devm_kzalloc(dev, sizeof(*drvdata), GFP_KERNEL); |
| if (!drvdata) |
| return -ENOMEM; |
| drvdata->dev = &pdev->dev; |
| platform_set_drvdata(pdev, drvdata); |
| |
| res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
| if (!res) |
| return -ENODEV; |
| reg_size = resource_size(res); |
| |
| drvdata->base = devm_ioremap(dev, res->start, resource_size(res)); |
| if (!drvdata->base) |
| return -ENOMEM; |
| |
| spin_lock_init(&drvdata->spinlock); |
| mutex_init(&drvdata->read_lock); |
| mutex_init(&drvdata->usb_lock); |
| |
| drvdata->clk = devm_clk_get(dev, "core_clk"); |
| if (IS_ERR(drvdata->clk)) |
| return PTR_ERR(drvdata->clk); |
| |
| ret = clk_set_rate(drvdata->clk, CORESIGHT_CLK_RATE_TRACE); |
| if (ret) |
| return ret; |
| |
| ret = clk_prepare_enable(drvdata->clk); |
| if (ret) |
| return ret; |
| |
| devid = tmc_readl(drvdata, CORESIGHT_DEVID); |
| drvdata->config_type = BMVAL(devid, 6, 7); |
| |
| if (drvdata->config_type == TMC_CONFIG_TYPE_ETR) { |
| if (pdev->dev.of_node) { |
| ret = of_property_read_u32(pdev->dev.of_node, |
| "qcom,memory-reservation-size", &drvdata->size); |
| if (ret) { |
| clk_disable_unprepare(drvdata->clk); |
| return ret; |
| } |
| } |
| } else { |
| drvdata->size = tmc_readl(drvdata, TMC_RSZ) * BYTES_PER_WORD; |
| } |
| |
| clk_disable_unprepare(drvdata->clk); |
| |
| if (drvdata->config_type == TMC_CONFIG_TYPE_ETR) { |
| drvdata->paddr = allocate_contiguous_ebi_nomap(drvdata->size, |
| SZ_4K); |
| if (!drvdata->paddr) |
| return -ENOMEM; |
| drvdata->vaddr = devm_ioremap(dev, drvdata->paddr, |
| drvdata->size); |
| if (!drvdata->vaddr) { |
| ret = -ENOMEM; |
| goto err0; |
| } |
| memset(drvdata->vaddr, 0, drvdata->size); |
| drvdata->buf = drvdata->vaddr; |
| drvdata->out_mode = TMC_ETR_OUT_MODE_MEM; |
| |
| ret = tmc_etr_bam_init(pdev, drvdata); |
| if (ret) |
| goto err0; |
| } else { |
| baddr = devm_kzalloc(dev, PAGE_SIZE + drvdata->size, |
| GFP_KERNEL); |
| if (!baddr) |
| return -ENOMEM; |
| drvdata->buf = baddr + PAGE_SIZE; |
| *(uint32_t *)(baddr + TMC_ETFETB_DUMP_VER_OFF) = |
| TMC_ETFETB_DUMP_VER; |
| dump.id = MSM_TMC_ETFETB + etfetb_count; |
| dump.start_addr = virt_to_phys(baddr); |
| dump.end_addr = dump.start_addr + PAGE_SIZE + drvdata->size; |
| ret = msm_dump_table_register(&dump); |
| /* |
| * Don't free the buffer in case of error since it can still |
| * be used to provide dump collection via the device node or |
| * as part of abort. |
| */ |
| if (ret) |
| dev_info(dev, "TMC ETF-ETB dump setup failed\n"); |
| etfetb_count++; |
| } |
| |
| baddr = devm_kzalloc(dev, PAGE_SIZE + reg_size, GFP_KERNEL); |
| if (baddr) { |
| drvdata->reg_buf = baddr + PAGE_SIZE; |
| *(uint32_t *)(baddr + TMC_REG_DUMP_VER_OFF) = TMC_REG_DUMP_VER; |
| dump.id = MSM_TMC0_REG + count; |
| dump.start_addr = virt_to_phys(baddr); |
| dump.end_addr = dump.start_addr + PAGE_SIZE + reg_size; |
| ret = msm_dump_table_register(&dump); |
| /* |
| * Don't free the buffer in case of error since it can still |
| * be used to dump registers as part of abort to aid post crash |
| * parsing. |
| */ |
| if (ret) |
| dev_info(dev, "TMC REG dump setup failed\n"); |
| } else { |
| dev_info(dev, "TMC REG dump space allocation failed\n"); |
| } |
| count++; |
| |
| desc = devm_kzalloc(dev, sizeof(*desc), GFP_KERNEL); |
| if (!desc) { |
| ret = -ENOMEM; |
| goto err1; |
| } |
| if (drvdata->config_type == TMC_CONFIG_TYPE_ETB) { |
| desc->type = CORESIGHT_DEV_TYPE_SINK; |
| desc->subtype.sink_subtype = CORESIGHT_DEV_SUBTYPE_SINK_BUFFER; |
| desc->ops = &tmc_etb_cs_ops; |
| desc->pdata = pdev->dev.platform_data; |
| desc->dev = &pdev->dev; |
| desc->groups = tmc_etb_attr_grps; |
| desc->owner = THIS_MODULE; |
| drvdata->csdev = coresight_register(desc); |
| if (IS_ERR(drvdata->csdev)) { |
| ret = PTR_ERR(drvdata->csdev); |
| goto err1; |
| } |
| } else if (drvdata->config_type == TMC_CONFIG_TYPE_ETR) { |
| desc->type = CORESIGHT_DEV_TYPE_SINK; |
| desc->subtype.sink_subtype = CORESIGHT_DEV_SUBTYPE_SINK_BUFFER; |
| desc->ops = &tmc_etr_cs_ops; |
| desc->pdata = pdev->dev.platform_data; |
| desc->dev = &pdev->dev; |
| desc->groups = tmc_etr_attr_grps; |
| desc->owner = THIS_MODULE; |
| drvdata->csdev = coresight_register(desc); |
| if (IS_ERR(drvdata->csdev)) { |
| ret = PTR_ERR(drvdata->csdev); |
| goto err1; |
| } |
| } else { |
| desc->type = CORESIGHT_DEV_TYPE_LINKSINK; |
| desc->subtype.sink_subtype = CORESIGHT_DEV_SUBTYPE_SINK_BUFFER; |
| desc->subtype.link_subtype = CORESIGHT_DEV_SUBTYPE_LINK_FIFO; |
| desc->ops = &tmc_etf_cs_ops; |
| desc->pdata = pdev->dev.platform_data; |
| desc->dev = &pdev->dev; |
| desc->groups = tmc_etf_attr_grps; |
| desc->owner = THIS_MODULE; |
| drvdata->csdev = coresight_register(desc); |
| if (IS_ERR(drvdata->csdev)) { |
| ret = PTR_ERR(drvdata->csdev); |
| goto err1; |
| } |
| } |
| |
| drvdata->miscdev.name = ((struct coresight_platform_data *) |
| (pdev->dev.platform_data))->name; |
| drvdata->miscdev.minor = MISC_DYNAMIC_MINOR; |
| drvdata->miscdev.fops = &tmc_fops; |
| ret = misc_register(&drvdata->miscdev); |
| if (ret) |
| goto err2; |
| |
| dev_info(dev, "TMC initialized\n"); |
| return 0; |
| err2: |
| coresight_unregister(drvdata->csdev); |
| err1: |
| tmc_etr_bam_exit(drvdata); |
| err0: |
| free_contiguous_memory_by_paddr(drvdata->paddr); |
| return ret; |
| } |
| |
| static int __devexit tmc_remove(struct platform_device *pdev) |
| { |
| struct tmc_drvdata *drvdata = platform_get_drvdata(pdev); |
| |
| misc_deregister(&drvdata->miscdev); |
| coresight_unregister(drvdata->csdev); |
| tmc_etr_bam_exit(drvdata); |
| free_contiguous_memory_by_paddr(drvdata->paddr); |
| return 0; |
| } |
| |
| static struct of_device_id tmc_match[] = { |
| {.compatible = "arm,coresight-tmc"}, |
| {} |
| }; |
| EXPORT_COMPAT("arm,coresight-tmc"); |
| |
| static struct platform_driver tmc_driver = { |
| .probe = tmc_probe, |
| .remove = __devexit_p(tmc_remove), |
| .driver = { |
| .name = "coresight-tmc", |
| .owner = THIS_MODULE, |
| .of_match_table = tmc_match, |
| }, |
| }; |
| |
| static int __init tmc_init(void) |
| { |
| return platform_driver_register(&tmc_driver); |
| } |
| module_init(tmc_init); |
| |
| static void __exit tmc_exit(void) |
| { |
| platform_driver_unregister(&tmc_driver); |
| } |
| module_exit(tmc_exit); |
| |
| MODULE_LICENSE("GPL v2"); |
| MODULE_DESCRIPTION("CoreSight Trace Memory Controller driver"); |