--- /dev/null
+/*
+ * OMAP4XXX L3 Interconnect error handling driver
+ *
+ * Copyright (C) 2011 Texas Corporation
+ * Santosh Shilimkar <santosh.shilimkar@ti.com>
+ * Sricharan <r.sricharan@ti.com>
+ *
+ * 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; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
+ * USA
+ */
+#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/platform_device.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/slab.h>
+
+#include "omap_l3_noc.h"
+
+/*
+ * Interrupt Handler for L3 error detection.
+ * 1) Identify the L3 clockdomain partition to which the error belongs to.
+ * 2) Identify the slave where the error information is logged
+ * 3) Print the logged information.
+ * 4) Add dump stack to provide kernel trace.
+ *
+ * Two Types of errors :
+ * 1) Custom errors in L3 :
+ * Target like DMM/FW/EMIF generates SRESP=ERR error
+ * 2) Standard L3 error:
+ * - Unsupported CMD.
+ * L3 tries to access target while it is idle
+ * - OCP disconnect.
+ * - Address hole error:
+ * If DSS/ISS/FDIF/USBHOSTFS access a target where they
+ * do not have connectivity, the error is logged in
+ * their default target which is DMM2.
+ *
+ * On High Secure devices, firewall errors are possible and those
+ * can be trapped as well. But the trapping is implemented as part
+ * secure software and hence need not be implemented here.
+ */
+static irqreturn_t l3_interrupt_handler(int irq, void *_l3)
+{
+
+ struct omap4_l3 *l3 = _l3;
+ int inttype, i, j;
+ int err_src = 0;
+ u32 std_err_main_addr, std_err_main, err_reg;
+ u32 base, slave_addr, clear;
+ char *source_name;
+
+ /* Get the Type of interrupt */
+ if (irq == l3->app_irq)
+ inttype = L3_APPLICATION_ERROR;
+ else
+ inttype = L3_DEBUG_ERROR;
+
+ for (i = 0; i < L3_MODULES; i++) {
+ /*
+ * Read the regerr register of the clock domain
+ * to determine the source
+ */
+ base = (u32)l3->l3_base[i];
+ err_reg = readl(base + l3_flagmux[i] + (inttype << 3));
+
+ /* Get the corresponding error and analyse */
+ if (err_reg) {
+ /* Identify the source from control status register */
+ for (j = 0; !(err_reg & (1 << j)); j++)
+ ;
+
+ err_src = j;
+ /* Read the stderrlog_main_source from clk domain */
+ std_err_main_addr = base + (*(l3_targ[i] + err_src));
+ std_err_main = readl(std_err_main_addr);
+
+ switch ((std_err_main & CUSTOM_ERROR)) {
+ case STANDARD_ERROR:
+ source_name =
+ l3_targ_stderrlog_main_name[i][err_src];
+
+ slave_addr = std_err_main_addr +
+ L3_SLAVE_ADDRESS_OFFSET;
+ WARN(true, "L3 standard error: SOURCE:%s at address 0x%x\n",
+ source_name, readl(slave_addr));
+ /* clear the std error log*/
+ clear = std_err_main | CLEAR_STDERR_LOG;
+ writel(clear, std_err_main_addr);
+ break;
+
+ case CUSTOM_ERROR:
+ source_name =
+ l3_targ_stderrlog_main_name[i][err_src];
+
+ WARN(true, "CUSTOM SRESP error with SOURCE:%s\n",
+ source_name);
+ /* clear the std error log*/
+ clear = std_err_main | CLEAR_STDERR_LOG;
+ writel(clear, std_err_main_addr);
+ break;
+
+ default:
+ /* Nothing to be handled here as of now */
+ break;
+ }
+ /* Error found so break the for loop */
+ break;
+ }
+ }
+ return IRQ_HANDLED;
+}
+
+static int __init omap4_l3_probe(struct platform_device *pdev)
+{
+ static struct omap4_l3 *l3;
+ struct resource *res;
+ int ret;
+ int irq;
+
+ l3 = kzalloc(sizeof(*l3), GFP_KERNEL);
+ if (!l3)
+ ret = -ENOMEM;
+
+ platform_set_drvdata(pdev, l3);
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!res) {
+ dev_err(&pdev->dev, "couldn't find resource 0\n");
+ ret = -ENODEV;
+ goto err1;
+ }
+
+ l3->l3_base[0] = ioremap(res->start, resource_size(res));
+ if (!(l3->l3_base[0])) {
+ dev_err(&pdev->dev, "ioremap failed\n");
+ ret = -ENOMEM;
+ goto err2;
+ }
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
+ if (!res) {
+ dev_err(&pdev->dev, "couldn't find resource 1\n");
+ ret = -ENODEV;
+ goto err3;
+ }
+
+ l3->l3_base[1] = ioremap(res->start, resource_size(res));
+ if (!(l3->l3_base[1])) {
+ dev_err(&pdev->dev, "ioremap failed\n");
+ ret = -ENOMEM;
+ goto err4;
+ }
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 2);
+ if (!res) {
+ dev_err(&pdev->dev, "couldn't find resource 2\n");
+ ret = -ENODEV;
+ goto err5;
+ }
+
+ l3->l3_base[2] = ioremap(res->start, resource_size(res));
+ if (!(l3->l3_base[2])) {
+ dev_err(&pdev->dev, "ioremap failed\n");
+ ret = -ENOMEM;
+ goto err6;
+ }
+
+ /*
+ * Setup interrupt Handlers
+ */
+ irq = platform_get_irq(pdev, 0);
+ ret = request_irq(irq,
+ l3_interrupt_handler,
+ IRQF_DISABLED, "l3-dbg-irq", l3);
+ if (ret) {
+ pr_crit("L3: request_irq failed to register for 0x%x\n",
+ OMAP44XX_IRQ_L3_DBG);
+ goto err7;
+ }
+ l3->debug_irq = irq;
+
+ irq = platform_get_irq(pdev, 1);
+ ret = request_irq(irq,
+ l3_interrupt_handler,
+ IRQF_DISABLED, "l3-app-irq", l3);
+ if (ret) {
+ pr_crit("L3: request_irq failed to register for 0x%x\n",
+ OMAP44XX_IRQ_L3_APP);
+ goto err8;
+ }
+ l3->app_irq = irq;
+
+ goto err0;
+err8:
+err7:
+ iounmap(l3->l3_base[2]);
+err6:
+err5:
+ iounmap(l3->l3_base[1]);
+err4:
+err3:
+ iounmap(l3->l3_base[0]);
+err2:
+err1:
+ kfree(l3);
+err0:
+ return ret;
+}
+
+static int __exit omap4_l3_remove(struct platform_device *pdev)
+{
+ struct omap4_l3 *l3 = platform_get_drvdata(pdev);
+
+ free_irq(l3->app_irq, l3);
+ free_irq(l3->debug_irq, l3);
+ iounmap(l3->l3_base[0]);
+ iounmap(l3->l3_base[1]);
+ iounmap(l3->l3_base[2]);
+ kfree(l3);
+
+ return 0;
+}
+
+static struct platform_driver omap4_l3_driver = {
+ .remove = __exit_p(omap4_l3_remove),
+ .driver = {
+ .name = "omap_l3_noc",
+ },
+};
+
+static int __init omap4_l3_init(void)
+{
+ return platform_driver_probe(&omap4_l3_driver, omap4_l3_probe);
+}
+postcore_initcall_sync(omap4_l3_init);
+
+static void __exit omap4_l3_exit(void)
+{
+ platform_driver_unregister(&omap4_l3_driver);
+}
+module_exit(omap4_l3_exit);
--- /dev/null
+ /*
+ * OMAP4XXX L3 Interconnect error handling driver header
+ *
+ * Copyright (C) 2011 Texas Corporation
+ * Santosh Shilimkar <santosh.shilimkar@ti.com>
+ * sricharan <r.sricharan@ti.com>
+ *
+ * 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; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
+ * USA
+ */
+#ifndef __ARCH_ARM_MACH_OMAP2_L3_INTERCONNECT_3XXX_H
+#define __ARCH_ARM_MACH_OMAP2_L3_INTERCONNECT_3XXX_H
+
+/*
+ * L3 register offsets
+ */
+#define L3_MODULES 3
+#define CLEAR_STDERR_LOG (1 << 31)
+#define CUSTOM_ERROR 0x2
+#define STANDARD_ERROR 0x0
+#define INBAND_ERROR 0x0
+#define EMIF_KERRLOG_OFFSET 0x10
+#define L3_SLAVE_ADDRESS_OFFSET 0x14
+#define LOGICAL_ADDR_ERRORLOG 0x4
+#define L3_APPLICATION_ERROR 0x0
+#define L3_DEBUG_ERROR 0x1
+
+u32 l3_flagmux[L3_MODULES] = {
+ 0x50C,
+ 0x100C,
+ 0X020C
+};
+
+/*
+ * L3 Target standard Error register offsets
+ */
+u32 l3_targ_stderrlog_main_clk1[] = {
+ 0x148, /* DMM1 */
+ 0x248, /* DMM2 */
+ 0x348, /* ABE */
+ 0x448, /* L4CFG */
+ 0x648 /* CLK2 PWR DISC */
+};
+
+u32 l3_targ_stderrlog_main_clk2[] = {
+ 0x548, /* CORTEX M3 */
+ 0x348, /* DSS */
+ 0x148, /* GPMC */
+ 0x448, /* ISS */
+ 0x748, /* IVAHD */
+ 0xD48, /* missing in TRM corresponds to AES1*/
+ 0x948, /* L4 PER0*/
+ 0x248, /* OCMRAM */
+ 0x148, /* missing in TRM corresponds to GPMC sERROR*/
+ 0x648, /* SGX */
+ 0x848, /* SL2 */
+ 0x1648, /* C2C */
+ 0x1148, /* missing in TRM corresponds PWR DISC CLK1*/
+ 0xF48, /* missing in TRM corrsponds to SHA1*/
+ 0xE48, /* missing in TRM corresponds to AES2*/
+ 0xC48, /* L4 PER3 */
+ 0xA48, /* L4 PER1*/
+ 0xB48 /* L4 PER2*/
+};
+
+u32 l3_targ_stderrlog_main_clk3[] = {
+ 0x0148 /* EMUSS */
+};
+
+char *l3_targ_stderrlog_main_name[L3_MODULES][18] = {
+ {
+ "DMM1",
+ "DMM2",
+ "ABE",
+ "L4CFG",
+ "CLK2 PWR DISC",
+ },
+ {
+ "CORTEX M3" ,
+ "DSS ",
+ "GPMC ",
+ "ISS ",
+ "IVAHD ",
+ "AES1",
+ "L4 PER0",
+ "OCMRAM ",
+ "GPMC sERROR",
+ "SGX ",
+ "SL2 ",
+ "C2C ",
+ "PWR DISC CLK1",
+ "SHA1",
+ "AES2",
+ "L4 PER3",
+ "L4 PER1",
+ "L4 PER2",
+ },
+ {
+ "EMUSS",
+ },
+};
+
+u32 *l3_targ[L3_MODULES] = {
+ l3_targ_stderrlog_main_clk1,
+ l3_targ_stderrlog_main_clk2,
+ l3_targ_stderrlog_main_clk3,
+};
+
+struct omap4_l3 {
+ struct device *dev;
+ struct clk *ick;
+
+ /* memory base */
+ void __iomem *l3_base[4];
+
+ int debug_irq;
+ int app_irq;
+};
+
+#endif
projects / GitHub / LineageOS / android_kernel_motorola_exynos9610.git / commitdiff