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authorSantosh Shilimkar <santosh.shilimkar@ti.com>2012-09-14 14:50:34 +0530
committerArnd Bergmann <arnd@arndb.de>2012-09-19 16:53:26 +0200
commit0ee7261c9212dbaf72d510e37f6c5b849d1847f0 (patch)
treecd9902a94a286aab6e337c31f8ec2768250e5b17 /drivers/bus
parent46ca6811534e66e7b3967512efe8259021cd5488 (diff)
downloadlinux-0ee7261c9212dbaf72d510e37f6c5b849d1847f0.tar.gz
drivers: bus: Move the OMAP interconnect driver to drivers/bus/
OMAP interconnect drivers are used for the interconnect error handling. Since they are bus driver, lets move it to newly created drivers/bus. Tested-by: Lokesh Vutla <lokeshvutla@ti.com> Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com> Acked-by: Tony Lindgren <tony@atomide.com> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Diffstat (limited to 'drivers/bus')
-rw-r--r--drivers/bus/Kconfig6
-rw-r--r--drivers/bus/Makefile3
-rw-r--r--drivers/bus/omap_l3_noc.c266
-rw-r--r--drivers/bus/omap_l3_noc.h176
-rw-r--r--drivers/bus/omap_l3_smx.c297
-rw-r--r--drivers/bus/omap_l3_smx.h338
6 files changed, 1086 insertions, 0 deletions
diff --git a/drivers/bus/Kconfig b/drivers/bus/Kconfig
index 6270415107d..bbec35d21fe 100644
--- a/drivers/bus/Kconfig
+++ b/drivers/bus/Kconfig
@@ -12,4 +12,10 @@ config OMAP_OCP2SCP
OCP2SCP and in OMAP5, both USB PHY and SATA PHY is connected via
OCP2SCP.
+config OMAP_INTERCONNECT
+ tristate "OMAP INTERCONNECT DRIVER"
+ depends on ARCH_OMAP2PLUS
+
+ help
+ Driver to enable OMAP interconnect error handling driver.
endmenu
diff --git a/drivers/bus/Makefile b/drivers/bus/Makefile
index 0ec50bc43d7..45d997c8545 100644
--- a/drivers/bus/Makefile
+++ b/drivers/bus/Makefile
@@ -3,3 +3,6 @@
#
obj-$(CONFIG_OMAP_OCP2SCP) += omap-ocp2scp.o
+
+# Interconnect bus driver for OMAP SoCs.
+obj-$(CONFIG_OMAP_INTERCONNECT) += omap_l3_smx.o omap_l3_noc.o
diff --git a/drivers/bus/omap_l3_noc.c b/drivers/bus/omap_l3_noc.c
new file mode 100644
index 00000000000..d15225ff5c4
--- /dev/null
+++ b/drivers/bus/omap_l3_noc.c
@@ -0,0 +1,266 @@
+/*
+ * 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/module.h>
+#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, k;
+ int err_src = 0;
+ u32 std_err_main, err_reg, clear, masterid;
+ void __iomem *base, *l3_targ_base;
+ char *target_name, *master_name = "UN IDENTIFIED";
+
+ /* Get the Type of interrupt */
+ inttype = irq == l3->app_irq ? L3_APPLICATION_ERROR : L3_DEBUG_ERROR;
+
+ for (i = 0; i < L3_MODULES; i++) {
+ /*
+ * Read the regerr register of the clock domain
+ * to determine the source
+ */
+ base = l3->l3_base[i];
+ err_reg = __raw_readl(base + l3_flagmux[i] +
+ + L3_FLAGMUX_REGERR0 + (inttype << 3));
+
+ /* Get the corresponding error and analyse */
+ if (err_reg) {
+ /* Identify the source from control status register */
+ err_src = __ffs(err_reg);
+
+ /* Read the stderrlog_main_source from clk domain */
+ l3_targ_base = base + *(l3_targ[i] + err_src);
+ std_err_main = __raw_readl(l3_targ_base +
+ L3_TARG_STDERRLOG_MAIN);
+ masterid = __raw_readl(l3_targ_base +
+ L3_TARG_STDERRLOG_MSTADDR);
+
+ switch (std_err_main & CUSTOM_ERROR) {
+ case STANDARD_ERROR:
+ target_name =
+ l3_targ_inst_name[i][err_src];
+ WARN(true, "L3 standard error: TARGET:%s at address 0x%x\n",
+ target_name,
+ __raw_readl(l3_targ_base +
+ L3_TARG_STDERRLOG_SLVOFSLSB));
+ /* clear the std error log*/
+ clear = std_err_main | CLEAR_STDERR_LOG;
+ writel(clear, l3_targ_base +
+ L3_TARG_STDERRLOG_MAIN);
+ break;
+
+ case CUSTOM_ERROR:
+ target_name =
+ l3_targ_inst_name[i][err_src];
+ for (k = 0; k < NUM_OF_L3_MASTERS; k++) {
+ if (masterid == l3_masters[k].id)
+ master_name =
+ l3_masters[k].name;
+ }
+ WARN(true, "L3 custom error: MASTER:%s TARGET:%s\n",
+ master_name, target_name);
+ /* clear the std error log*/
+ clear = std_err_main | CLEAR_STDERR_LOG;
+ writel(clear, l3_targ_base +
+ L3_TARG_STDERRLOG_MAIN);
+ break;
+
+ default:
+ /* Nothing to be handled here as of now */
+ break;
+ }
+ /* Error found so break the for loop */
+ break;
+ }
+ }
+ return IRQ_HANDLED;
+}
+
+static int __devinit omap4_l3_probe(struct platform_device *pdev)
+{
+ static struct omap4_l3 *l3;
+ struct resource *res;
+ int ret;
+
+ l3 = kzalloc(sizeof(*l3), GFP_KERNEL);
+ if (!l3)
+ return -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 err0;
+ }
+
+ 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 err0;
+ }
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
+ if (!res) {
+ dev_err(&pdev->dev, "couldn't find resource 1\n");
+ ret = -ENODEV;
+ goto err1;
+ }
+
+ 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 err1;
+ }
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 2);
+ if (!res) {
+ dev_err(&pdev->dev, "couldn't find resource 2\n");
+ ret = -ENODEV;
+ goto err2;
+ }
+
+ 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 err2;
+ }
+
+ /*
+ * Setup interrupt Handlers
+ */
+ l3->debug_irq = platform_get_irq(pdev, 0);
+ ret = request_irq(l3->debug_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 err3;
+ }
+
+ l3->app_irq = platform_get_irq(pdev, 1);
+ ret = request_irq(l3->app_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 err4;
+ }
+
+ return 0;
+
+err4:
+ free_irq(l3->debug_irq, l3);
+err3:
+ iounmap(l3->l3_base[2]);
+err2:
+ iounmap(l3->l3_base[1]);
+err1:
+ iounmap(l3->l3_base[0]);
+err0:
+ kfree(l3);
+ return ret;
+}
+
+static int __devexit 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;
+}
+
+#if defined(CONFIG_OF)
+static const struct of_device_id l3_noc_match[] = {
+ {.compatible = "ti,omap4-l3-noc", },
+ {},
+};
+MODULE_DEVICE_TABLE(of, l3_noc_match);
+#else
+#define l3_noc_match NULL
+#endif
+
+static struct platform_driver omap4_l3_driver = {
+ .probe = omap4_l3_probe,
+ .remove = __devexit_p(omap4_l3_remove),
+ .driver = {
+ .name = "omap_l3_noc",
+ .owner = THIS_MODULE,
+ .of_match_table = l3_noc_match,
+ },
+};
+
+static int __init omap4_l3_init(void)
+{
+ return platform_driver_register(&omap4_l3_driver);
+}
+postcore_initcall_sync(omap4_l3_init);
+
+static void __exit omap4_l3_exit(void)
+{
+ platform_driver_unregister(&omap4_l3_driver);
+}
+module_exit(omap4_l3_exit);
diff --git a/drivers/bus/omap_l3_noc.h b/drivers/bus/omap_l3_noc.h
new file mode 100644
index 00000000000..a6ce34dc481
--- /dev/null
+++ b/drivers/bus/omap_l3_noc.h
@@ -0,0 +1,176 @@
+/*
+ * 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
+
+#define L3_MODULES 3
+#define CLEAR_STDERR_LOG (1 << 31)
+#define CUSTOM_ERROR 0x2
+#define STANDARD_ERROR 0x0
+#define INBAND_ERROR 0x0
+#define L3_APPLICATION_ERROR 0x0
+#define L3_DEBUG_ERROR 0x1
+
+/* L3 TARG register offsets */
+#define L3_TARG_STDERRLOG_MAIN 0x48
+#define L3_TARG_STDERRLOG_SLVOFSLSB 0x5c
+#define L3_TARG_STDERRLOG_MSTADDR 0x68
+#define L3_FLAGMUX_REGERR0 0xc
+
+#define NUM_OF_L3_MASTERS (sizeof(l3_masters)/sizeof(l3_masters[0]))
+
+static u32 l3_flagmux[L3_MODULES] = {
+ 0x500,
+ 0x1000,
+ 0X0200
+};
+
+/* L3 Target standard Error register offsets */
+static u32 l3_targ_inst_clk1[] = {
+ 0x100, /* DMM1 */
+ 0x200, /* DMM2 */
+ 0x300, /* ABE */
+ 0x400, /* L4CFG */
+ 0x600, /* CLK2 PWR DISC */
+ 0x0, /* Host CLK1 */
+ 0x900 /* L4 Wakeup */
+};
+
+static u32 l3_targ_inst_clk2[] = {
+ 0x500, /* CORTEX M3 */
+ 0x300, /* DSS */
+ 0x100, /* GPMC */
+ 0x400, /* ISS */
+ 0x700, /* IVAHD */
+ 0xD00, /* missing in TRM corresponds to AES1*/
+ 0x900, /* L4 PER0*/
+ 0x200, /* OCMRAM */
+ 0x100, /* missing in TRM corresponds to GPMC sERROR*/
+ 0x600, /* SGX */
+ 0x800, /* SL2 */
+ 0x1600, /* C2C */
+ 0x1100, /* missing in TRM corresponds PWR DISC CLK1*/
+ 0xF00, /* missing in TRM corrsponds to SHA1*/
+ 0xE00, /* missing in TRM corresponds to AES2*/
+ 0xC00, /* L4 PER3 */
+ 0xA00, /* L4 PER1*/
+ 0xB00, /* L4 PER2*/
+ 0x0, /* HOST CLK2 */
+ 0x1800, /* CAL */
+ 0x1700 /* LLI */
+};
+
+static u32 l3_targ_inst_clk3[] = {
+ 0x0100 /* EMUSS */,
+ 0x0300, /* DEBUGSS_CT_TBR */
+ 0x0 /* HOST CLK3 */
+};
+
+static struct l3_masters_data {
+ u32 id;
+ char name[10];
+} l3_masters[] = {
+ { 0x0 , "MPU"},
+ { 0x10, "CS_ADP"},
+ { 0x14, "xxx"},
+ { 0x20, "DSP"},
+ { 0x30, "IVAHD"},
+ { 0x40, "ISS"},
+ { 0x44, "DucatiM3"},
+ { 0x48, "FaceDetect"},
+ { 0x50, "SDMA_Rd"},
+ { 0x54, "SDMA_Wr"},
+ { 0x58, "xxx"},
+ { 0x5C, "xxx"},
+ { 0x60, "SGX"},
+ { 0x70, "DSS"},
+ { 0x80, "C2C"},
+ { 0x88, "xxx"},
+ { 0x8C, "xxx"},
+ { 0x90, "HSI"},
+ { 0xA0, "MMC1"},
+ { 0xA4, "MMC2"},
+ { 0xA8, "MMC6"},
+ { 0xB0, "UNIPRO1"},
+ { 0xC0, "USBHOSTHS"},
+ { 0xC4, "USBOTGHS"},
+ { 0xC8, "USBHOSTFS"}
+};
+
+static char *l3_targ_inst_name[L3_MODULES][21] = {
+ {
+ "DMM1",
+ "DMM2",
+ "ABE",
+ "L4CFG",
+ "CLK2 PWR DISC",
+ "HOST CLK1",
+ "L4 WAKEUP"
+ },
+ {
+ "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",
+ "HOST CLK2",
+ "CAL",
+ "LLI"
+ },
+ {
+ "EMUSS",
+ "DEBUG SOURCE",
+ "HOST CLK3"
+ },
+};
+
+static u32 *l3_targ[L3_MODULES] = {
+ l3_targ_inst_clk1,
+ l3_targ_inst_clk2,
+ l3_targ_inst_clk3,
+};
+
+struct omap4_l3 {
+ struct device *dev;
+ struct clk *ick;
+
+ /* memory base */
+ void __iomem *l3_base[L3_MODULES];
+
+ int debug_irq;
+ int app_irq;
+};
+#endif
diff --git a/drivers/bus/omap_l3_smx.c b/drivers/bus/omap_l3_smx.c
new file mode 100644
index 00000000000..acc216491b8
--- /dev/null
+++ b/drivers/bus/omap_l3_smx.c
@@ -0,0 +1,297 @@
+/*
+ * OMAP3XXX L3 Interconnect Driver
+ *
+ * Copyright (C) 2011 Texas Corporation
+ * Felipe Balbi <balbi@ti.com>
+ * 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/kernel.h>
+#include <linux/slab.h>
+#include <linux/platform_device.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include "omap_l3_smx.h"
+
+static inline u64 omap3_l3_readll(void __iomem *base, u16 reg)
+{
+ return __raw_readll(base + reg);
+}
+
+static inline void omap3_l3_writell(void __iomem *base, u16 reg, u64 value)
+{
+ __raw_writell(value, base + reg);
+}
+
+static inline enum omap3_l3_code omap3_l3_decode_error_code(u64 error)
+{
+ return (error & 0x0f000000) >> L3_ERROR_LOG_CODE;
+}
+
+static inline u32 omap3_l3_decode_addr(u64 error_addr)
+{
+ return error_addr & 0xffffffff;
+}
+
+static inline unsigned omap3_l3_decode_cmd(u64 error)
+{
+ return (error & 0x07) >> L3_ERROR_LOG_CMD;
+}
+
+static inline enum omap3_l3_initiator_id omap3_l3_decode_initid(u64 error)
+{
+ return (error & 0xff00) >> L3_ERROR_LOG_INITID;
+}
+
+static inline unsigned omap3_l3_decode_req_info(u64 error)
+{
+ return (error >> 32) & 0xffff;
+}
+
+static char *omap3_l3_code_string(u8 code)
+{
+ switch (code) {
+ case OMAP_L3_CODE_NOERROR:
+ return "No Error";
+ case OMAP_L3_CODE_UNSUP_CMD:
+ return "Unsupported Command";
+ case OMAP_L3_CODE_ADDR_HOLE:
+ return "Address Hole";
+ case OMAP_L3_CODE_PROTECT_VIOLATION:
+ return "Protection Violation";
+ case OMAP_L3_CODE_IN_BAND_ERR:
+ return "In-band Error";
+ case OMAP_L3_CODE_REQ_TOUT_NOT_ACCEPT:
+ return "Request Timeout Not Accepted";
+ case OMAP_L3_CODE_REQ_TOUT_NO_RESP:
+ return "Request Timeout, no response";
+ default:
+ return "UNKNOWN error";
+ }
+}
+
+static char *omap3_l3_initiator_string(u8 initid)
+{
+ switch (initid) {
+ case OMAP_L3_LCD:
+ return "LCD";
+ case OMAP_L3_SAD2D:
+ return "SAD2D";
+ case OMAP_L3_IA_MPU_SS_1:
+ case OMAP_L3_IA_MPU_SS_2:
+ case OMAP_L3_IA_MPU_SS_3:
+ case OMAP_L3_IA_MPU_SS_4:
+ case OMAP_L3_IA_MPU_SS_5:
+ return "MPU";
+ case OMAP_L3_IA_IVA_SS_1:
+ case OMAP_L3_IA_IVA_SS_2:
+ case OMAP_L3_IA_IVA_SS_3:
+ return "IVA_SS";
+ case OMAP_L3_IA_IVA_SS_DMA_1:
+ case OMAP_L3_IA_IVA_SS_DMA_2:
+ case OMAP_L3_IA_IVA_SS_DMA_3:
+ case OMAP_L3_IA_IVA_SS_DMA_4:
+ case OMAP_L3_IA_IVA_SS_DMA_5:
+ case OMAP_L3_IA_IVA_SS_DMA_6:
+ return "IVA_SS_DMA";
+ case OMAP_L3_IA_SGX:
+ return "SGX";
+ case OMAP_L3_IA_CAM_1:
+ case OMAP_L3_IA_CAM_2:
+ case OMAP_L3_IA_CAM_3:
+ return "CAM";
+ case OMAP_L3_IA_DAP:
+ return "DAP";
+ case OMAP_L3_SDMA_WR_1:
+ case OMAP_L3_SDMA_WR_2:
+ return "SDMA_WR";
+ case OMAP_L3_SDMA_RD_1:
+ case OMAP_L3_SDMA_RD_2:
+ case OMAP_L3_SDMA_RD_3:
+ case OMAP_L3_SDMA_RD_4:
+ return "SDMA_RD";
+ case OMAP_L3_USBOTG:
+ return "USB_OTG";
+ case OMAP_L3_USBHOST:
+ return "USB_HOST";
+ default:
+ return "UNKNOWN Initiator";
+ }
+}
+
+/*
+ * omap3_l3_block_irq - handles a register block's irq
+ * @l3: struct omap3_l3 *
+ * @base: register block base address
+ * @error: L3_ERROR_LOG register of our block
+ *
+ * Called in hard-irq context. Caller should take care of locking
+ *
+ * OMAP36xx TRM gives, on page 2001, Figure 9-10, the Typical Error
+ * Analysis Sequence, we are following that sequence here, please
+ * refer to that Figure for more information on the subject.
+ */
+static irqreturn_t omap3_l3_block_irq(struct omap3_l3 *l3,
+ u64 error, int error_addr)
+{
+ u8 code = omap3_l3_decode_error_code(error);
+ u8 initid = omap3_l3_decode_initid(error);
+ u8 multi = error & L3_ERROR_LOG_MULTI;
+ u32 address = omap3_l3_decode_addr(error_addr);
+
+ pr_err("%s seen by %s %s at address %x\n",
+ omap3_l3_code_string(code),
+ omap3_l3_initiator_string(initid),
+ multi ? "Multiple Errors" : "", address);
+ WARN_ON(1);
+
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t omap3_l3_app_irq(int irq, void *_l3)
+{
+ struct omap3_l3 *l3 = _l3;
+ u64 status, clear;
+ u64 error;
+ u64 error_addr;
+ u64 err_source = 0;
+ void __iomem *base;
+ int int_type;
+ irqreturn_t ret = IRQ_NONE;
+
+ int_type = irq == l3->app_irq ? L3_APPLICATION_ERROR : L3_DEBUG_ERROR;
+ if (!int_type) {
+ status = omap3_l3_readll(l3->rt, L3_SI_FLAG_STATUS_0);
+ /*
+ * if we have a timeout error, there's nothing we can
+ * do besides rebooting the board. So let's BUG on any
+ * of such errors and handle the others. timeout error
+ * is severe and not expected to occur.
+ */
+ BUG_ON(status & L3_STATUS_0_TIMEOUT_MASK);
+ } else {
+ status = omap3_l3_readll(l3->rt, L3_SI_FLAG_STATUS_1);
+ /* No timeout error for debug sources */
+ }
+
+ /* identify the error source */
+ err_source = __ffs(status);
+
+ base = l3->rt + omap3_l3_bases[int_type][err_source];
+ error = omap3_l3_readll(base, L3_ERROR_LOG);
+ if (error) {
+ error_addr = omap3_l3_readll(base, L3_ERROR_LOG_ADDR);
+ ret |= omap3_l3_block_irq(l3, error, error_addr);
+ }
+
+ /* Clear the status register */
+ clear = (L3_AGENT_STATUS_CLEAR_IA << int_type) |
+ L3_AGENT_STATUS_CLEAR_TA;
+ omap3_l3_writell(base, L3_AGENT_STATUS, clear);
+
+ /* clear the error log register */
+ omap3_l3_writell(base, L3_ERROR_LOG, error);
+
+ return ret;
+}
+
+static int __init omap3_l3_probe(struct platform_device *pdev)
+{
+ struct omap3_l3 *l3;
+ struct resource *res;
+ int ret;
+
+ l3 = kzalloc(sizeof(*l3), GFP_KERNEL);
+ if (!l3)
+ return -ENOMEM;
+
+ platform_set_drvdata(pdev, l3);
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!res) {
+ dev_err(&pdev->dev, "couldn't find resource\n");
+ ret = -ENODEV;
+ goto err0;
+ }
+ l3->rt = ioremap(res->start, resource_size(res));
+ if (!l3->rt) {
+ dev_err(&pdev->dev, "ioremap failed\n");
+ ret = -ENOMEM;
+ goto err0;
+ }
+
+ l3->debug_irq = platform_get_irq(pdev, 0);
+ ret = request_irq(l3->debug_irq, omap3_l3_app_irq,
+ IRQF_DISABLED | IRQF_TRIGGER_RISING,
+ "l3-debug-irq", l3);
+ if (ret) {
+ dev_err(&pdev->dev, "couldn't request debug irq\n");
+ goto err1;
+ }
+
+ l3->app_irq = platform_get_irq(pdev, 1);
+ ret = request_irq(l3->app_irq, omap3_l3_app_irq,
+ IRQF_DISABLED | IRQF_TRIGGER_RISING,
+ "l3-app-irq", l3);
+ if (ret) {
+ dev_err(&pdev->dev, "couldn't request app irq\n");
+ goto err2;
+ }
+
+ return 0;
+
+err2:
+ free_irq(l3->debug_irq, l3);
+err1:
+ iounmap(l3->rt);
+err0:
+ kfree(l3);
+ return ret;
+}
+
+static int __exit omap3_l3_remove(struct platform_device *pdev)
+{
+ struct omap3_l3 *l3 = platform_get_drvdata(pdev);
+
+ free_irq(l3->app_irq, l3);
+ free_irq(l3->debug_irq, l3);
+ iounmap(l3->rt);
+ kfree(l3);
+
+ return 0;
+}
+
+static struct platform_driver omap3_l3_driver = {
+ .remove = __exit_p(omap3_l3_remove),
+ .driver = {
+ .name = "omap_l3_smx",
+ },
+};
+
+static int __init omap3_l3_init(void)
+{
+ return platform_driver_probe(&omap3_l3_driver, omap3_l3_probe);
+}
+postcore_initcall_sync(omap3_l3_init);
+
+static void __exit omap3_l3_exit(void)
+{
+ platform_driver_unregister(&omap3_l3_driver);
+}
+module_exit(omap3_l3_exit);
diff --git a/drivers/bus/omap_l3_smx.h b/drivers/bus/omap_l3_smx.h
new file mode 100644
index 00000000000..4f3cebca417
--- /dev/null
+++ b/drivers/bus/omap_l3_smx.h
@@ -0,0 +1,338 @@
+/*
+ * OMAP3XXX L3 Interconnect Driver header
+ *
+ * Copyright (C) 2011 Texas Corporation
+ * Felipe Balbi <balbi@ti.com>
+ * 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
+
+/* Register definitions. All 64-bit wide */
+#define L3_COMPONENT 0x000
+#define L3_CORE 0x018
+#define L3_AGENT_CONTROL 0x020
+#define L3_AGENT_STATUS 0x028
+#define L3_ERROR_LOG 0x058
+
+#define L3_ERROR_LOG_MULTI (1 << 31)
+#define L3_ERROR_LOG_SECONDARY (1 << 30)
+
+#define L3_ERROR_LOG_ADDR 0x060
+
+/* Register definitions for Sideband Interconnect */
+#define L3_SI_CONTROL 0x020
+#define L3_SI_FLAG_STATUS_0 0x510
+
+static const u64 shift = 1;
+
+#define L3_STATUS_0_MPUIA_BRST (shift << 0)
+#define L3_STATUS_0_MPUIA_RSP (shift << 1)
+#define L3_STATUS_0_MPUIA_INBAND (shift << 2)
+#define L3_STATUS_0_IVAIA_BRST (shift << 6)
+#define L3_STATUS_0_IVAIA_RSP (shift << 7)
+#define L3_STATUS_0_IVAIA_INBAND (shift << 8)
+#define L3_STATUS_0_SGXIA_BRST (shift << 9)
+#define L3_STATUS_0_SGXIA_RSP (shift << 10)
+#define L3_STATUS_0_SGXIA_MERROR (shift << 11)
+#define L3_STATUS_0_CAMIA_BRST (shift << 12)
+#define L3_STATUS_0_CAMIA_RSP (shift << 13)
+#define L3_STATUS_0_CAMIA_INBAND (shift << 14)
+#define L3_STATUS_0_DISPIA_BRST (shift << 15)
+#define L3_STATUS_0_DISPIA_RSP (shift << 16)
+#define L3_STATUS_0_DMARDIA_BRST (shift << 18)
+#define L3_STATUS_0_DMARDIA_RSP (shift << 19)
+#define L3_STATUS_0_DMAWRIA_BRST (shift << 21)
+#define L3_STATUS_0_DMAWRIA_RSP (shift << 22)
+#define L3_STATUS_0_USBOTGIA_BRST (shift << 24)
+#define L3_STATUS_0_USBOTGIA_RSP (shift << 25)
+#define L3_STATUS_0_USBOTGIA_INBAND (shift << 26)
+#define L3_STATUS_0_USBHOSTIA_BRST (shift << 27)
+#define L3_STATUS_0_USBHOSTIA_INBAND (shift << 28)
+#define L3_STATUS_0_SMSTA_REQ (shift << 48)
+#define L3_STATUS_0_GPMCTA_REQ (shift << 49)
+#define L3_STATUS_0_OCMRAMTA_REQ (shift << 50)
+#define L3_STATUS_0_OCMROMTA_REQ (shift << 51)
+#define L3_STATUS_0_IVATA_REQ (shift << 54)
+#define L3_STATUS_0_SGXTA_REQ (shift << 55)
+#define L3_STATUS_0_SGXTA_SERROR (shift << 56)
+#define L3_STATUS_0_GPMCTA_SERROR (shift << 57)
+#define L3_STATUS_0_L4CORETA_REQ (shift << 58)
+#define L3_STATUS_0_L4PERTA_REQ (shift << 59)
+#define L3_STATUS_0_L4EMUTA_REQ (shift << 60)
+#define L3_STATUS_0_MAD2DTA_REQ (shift << 61)
+
+#define L3_STATUS_0_TIMEOUT_MASK (L3_STATUS_0_MPUIA_BRST \
+ | L3_STATUS_0_MPUIA_RSP \
+ | L3_STATUS_0_IVAIA_BRST \
+ | L3_STATUS_0_IVAIA_RSP \
+ | L3_STATUS_0_SGXIA_BRST \
+ | L3_STATUS_0_SGXIA_RSP \
+ | L3_STATUS_0_CAMIA_BRST \
+ | L3_STATUS_0_CAMIA_RSP \
+ | L3_STATUS_0_DISPIA_BRST \
+ | L3_STATUS_0_DISPIA_RSP \
+ | L3_STATUS_0_DMARDIA_BRST \
+ | L3_STATUS_0_DMARDIA_RSP \
+ | L3_STATUS_0_DMAWRIA_BRST \
+ | L3_STATUS_0_DMAWRIA_RSP \
+ | L3_STATUS_0_USBOTGIA_BRST \
+ | L3_STATUS_0_USBOTGIA_RSP \
+ | L3_STATUS_0_USBHOSTIA_BRST \
+ | L3_STATUS_0_SMSTA_REQ \
+ | L3_STATUS_0_GPMCTA_REQ \
+ | L3_STATUS_0_OCMRAMTA_REQ \
+ | L3_STATUS_0_OCMROMTA_REQ \
+ | L3_STATUS_0_IVATA_REQ \
+ | L3_STATUS_0_SGXTA_REQ \
+ | L3_STATUS_0_L4CORETA_REQ \
+ | L3_STATUS_0_L4PERTA_REQ \
+ | L3_STATUS_0_L4EMUTA_REQ \
+ | L3_STATUS_0_MAD2DTA_REQ)
+
+#define L3_SI_FLAG_STATUS_1 0x530
+
+#define L3_STATUS_1_MPU_DATAIA (1 << 0)
+#define L3_STATUS_1_DAPIA0 (1 << 3)
+#define L3_STATUS_1_DAPIA1 (1 << 4)
+#define L3_STATUS_1_IVAIA (1 << 6)
+
+#define L3_PM_ERROR_LOG 0x020
+#define L3_PM_CONTROL 0x028
+#define L3_PM_ERROR_CLEAR_SINGLE 0x030
+#define L3_PM_ERROR_CLEAR_MULTI 0x038
+#define L3_PM_REQ_INFO_PERMISSION(n) (0x048 + (0x020 * n))
+#define L3_PM_READ_PERMISSION(n) (0x050 + (0x020 * n))
+#define L3_PM_WRITE_PERMISSION(n) (0x058 + (0x020 * n))
+#define L3_PM_ADDR_MATCH(n) (0x060 + (0x020 * n))
+
+/* L3 error log bit fields. Common for IA and TA */
+#define L3_ERROR_LOG_CODE 24
+#define L3_ERROR_LOG_INITID 8
+#define L3_ERROR_LOG_CMD 0
+
+/* L3 agent status bit fields. */
+#define L3_AGENT_STATUS_CLEAR_IA 0x10000000
+#define L3_AGENT_STATUS_CLEAR_TA 0x01000000
+
+#define OMAP34xx_IRQ_L3_APP 10
+#define L3_APPLICATION_ERROR 0x0
+#define L3_DEBUG_ERROR 0x1
+
+enum omap3_l3_initiator_id {
+ /* LCD has 1 ID */
+ OMAP_L3_LCD = 29,
+ /* SAD2D has 1 ID */
+ OMAP_L3_SAD2D = 28,
+ /* MPU has 5 IDs */
+ OMAP_L3_IA_MPU_SS_1 = 27,
+ OMAP_L3_IA_MPU_SS_2 = 26,
+ OMAP_L3_IA_MPU_SS_3 = 25,
+ OMAP_L3_IA_MPU_SS_4 = 24,
+ OMAP_L3_IA_MPU_SS_5 = 23,
+ /* IVA2.2 SS has 3 IDs*/
+ OMAP_L3_IA_IVA_SS_1 = 22,
+ OMAP_L3_IA_IVA_SS_2 = 21,
+ OMAP_L3_IA_IVA_SS_3 = 20,
+ /* IVA 2.2 SS DMA has 6 IDS */
+ OMAP_L3_IA_IVA_SS_DMA_1 = 19,
+ OMAP_L3_IA_IVA_SS_DMA_2 = 18,
+ OMAP_L3_IA_IVA_SS_DMA_3 = 17,
+ OMAP_L3_IA_IVA_SS_DMA_4 = 16,
+ OMAP_L3_IA_IVA_SS_DMA_5 = 15,
+ OMAP_L3_IA_IVA_SS_DMA_6 = 14,
+ /* SGX has 1 ID */
+ OMAP_L3_IA_SGX = 13,
+ /* CAM has 3 ID */
+ OMAP_L3_IA_CAM_1 = 12,
+ OMAP_L3_IA_CAM_2 = 11,
+ OMAP_L3_IA_CAM_3 = 10,
+ /* DAP has 1 ID */
+ OMAP_L3_IA_DAP = 9,
+ /* SDMA WR has 2 IDs */
+ OMAP_L3_SDMA_WR_1 = 8,
+ OMAP_L3_SDMA_WR_2 = 7,
+ /* SDMA RD has 4 IDs */
+ OMAP_L3_SDMA_RD_1 = 6,
+ OMAP_L3_SDMA_RD_2 = 5,
+ OMAP_L3_SDMA_RD_3 = 4,
+ OMAP_L3_SDMA_RD_4 = 3,
+ /* HSUSB OTG has 1 ID */
+ OMAP_L3_USBOTG = 2,
+ /* HSUSB HOST has 1 ID */
+ OMAP_L3_USBHOST = 1,
+};
+
+enum omap3_l3_code {
+ OMAP_L3_CODE_NOERROR = 0,
+ OMAP_L3_CODE_UNSUP_CMD = 1,
+ OMAP_L3_CODE_ADDR_HOLE = 2,
+ OMAP_L3_CODE_PROTECT_VIOLATION = 3,
+ OMAP_L3_CODE_IN_BAND_ERR = 4,
+ /* codes 5 and 6 are reserved */
+ OMAP_L3_CODE_REQ_TOUT_NOT_ACCEPT = 7,
+ OMAP_L3_CODE_REQ_TOUT_NO_RESP = 8,
+ /* codes 9 - 15 are also reserved */
+};
+
+struct omap3_l3 {
+ struct device *dev;
+ struct clk *ick;
+
+ /* memory base*/
+ void __iomem *rt;
+
+ int debug_irq;
+ int app_irq;
+
+ /* true when and inband functional error occurs */
+ unsigned inband:1;
+};
+
+/* offsets for l3 agents in order with the Flag status register */
+static unsigned int omap3_l3_app_bases[] = {
+ /* MPU IA */
+ 0x1400,
+ 0x1400,
+ 0x1400,
+ /* RESERVED */
+ 0,
+ 0,
+ 0,
+ /* IVA 2.2 IA */
+ 0x1800,
+ 0x1800,
+ 0x1800,
+ /* SGX IA */
+ 0x1c00,
+ 0x1c00,
+ /* RESERVED */
+ 0,
+ /* CAMERA IA */
+ 0x5800,
+ 0x5800,
+ 0x5800,
+ /* DISPLAY IA */
+ 0x5400,
+ 0x5400,
+ /* RESERVED */
+ 0,
+ /*SDMA RD IA */
+ 0x4c00,
+ 0x4c00,
+ /* RESERVED */
+ 0,
+ /* SDMA WR IA */
+ 0x5000,
+ 0x5000,
+ /* RESERVED */
+ 0,
+ /* USB OTG IA */
+ 0x4400,
+ 0x4400,
+ 0x4400,
+ /* USB HOST IA */
+ 0x4000,
+ 0x4000,
+ /* RESERVED */
+ 0,
+ 0,
+ 0,
+ 0,
+ /* SAD2D IA */
+ 0x3000,
+ 0x3000,
+ 0x3000,
+ /* RESERVED */
+ 0,
+ 0,
+ 0,
+ 0,
+ 0,
+ 0,
+ 0,
+ 0,
+ 0,
+ 0,
+ 0,
+ 0,
+ /* SMA TA */
+ 0x2000,
+ /* GPMC TA */
+ 0x2400,
+ /* OCM RAM TA */
+ 0x2800,
+ /* OCM ROM TA */
+ 0x2C00,
+ /* L4 CORE TA */
+ 0x6800,
+ /* L4 PER TA */
+ 0x6c00,
+ /* IVA 2.2 TA */
+ 0x6000,
+ /* SGX TA */
+ 0x6400,
+ /* L4 EMU TA */
+ 0x7000,
+ /* GPMC TA */
+ 0x2400,
+ /* L4 CORE TA */
+ 0x6800,
+ /* L4 PER TA */
+ 0x6c00,
+ /* L4 EMU TA */
+ 0x7000,
+ /* MAD2D TA */
+ 0x3400,
+ /* RESERVED */
+ 0,
+ 0,
+};
+
+static unsigned int omap3_l3_debug_bases[] = {
+ /* MPU DATA IA */
+ 0x1400,
+ /* RESERVED */
+ 0,
+ 0,
+ /* DAP IA */
+ 0x5c00,
+ 0x5c00,
+ /* RESERVED */
+ 0,
+ /* IVA 2.2 IA */
+ 0x1800,
+ /* REST RESERVED */
+};
+
+static u32 *omap3_l3_bases[] = {
+ omap3_l3_app_bases,
+ omap3_l3_debug_bases,
+};
+
+/*
+ * REVISIT define __raw_readll/__raw_writell here, but move them to
+ * <asm/io.h> at some point
+ */
+#define __raw_writell(v, a) (__chk_io_ptr(a), \
+ *(volatile u64 __force *)(a) = (v))
+#define __raw_readll(a) (__chk_io_ptr(a), \
+ *(volatile u64 __force *)(a))
+
+#endif