1 files changed, 77 insertions, 8 deletions

diff --git a/arch/powerpc/sysdev/fsl_rio.c b/arch/powerpc/sysdev/fsl_rio.c
index 34440e1bac18..5b206a2fe17c 100644
--- a/arch/powerpc/sysdev/fsl_rio.c
+++ b/arch/powerpc/sysdev/fsl_rio.c
@@ -10,7 +10,7 @@
  * - Added Port-Write message handling
  * - Added Machine Check exception handling
  *
- * Copyright (C) 2007, 2008 Freescale Semiconductor, Inc.
+ * Copyright (C) 2007, 2008, 2010 Freescale Semiconductor, Inc.
  * Zhang Wei <wei.zhang@freescale.com>
  *
  * Copyright 2005 MontaVista Software, Inc.
@@ -47,15 +47,33 @@
 #define IRQ_RIO_RX(m)           (((struct rio_priv *)(m->priv))->rxirq)
 #define IRQ_RIO_PW(m)           (((struct rio_priv *)(m->priv))->pwirq)
 
+#define IPWSR_CLEAR             0x98
+#define OMSR_CLEAR              0x1cb3
+#define IMSR_CLEAR              0x491
+#define IDSR_CLEAR              0x91
+#define ODSR_CLEAR              0x1c00
+#define LTLEECSR_ENABLE_ALL     0xFFC000FC
+#define ESCSR_CLEAR             0x07120204
+
+#define RIO_PORT1_EDCSR         0x0640
+#define RIO_PORT2_EDCSR         0x0680
+#define RIO_PORT1_IECSR         0x10130
+#define RIO_PORT2_IECSR         0x101B0
+#define RIO_IM0SR               0x13064
+#define RIO_IM1SR               0x13164
+#define RIO_OM0SR               0x13004
+#define RIO_OM1SR               0x13104
+
 #define RIO_ATMU_REGS_OFFSET    0x10c00
 #define RIO_P_MSG_REGS_OFFSET   0x11000
 #define RIO_S_MSG_REGS_OFFSET   0x13000
 #define RIO_GCCSR               0x13c
 #define RIO_ESCSR               0x158
+#define RIO_PORT2_ESCSR         0x178
 #define RIO_CCSR                0x15c
 #define RIO_LTLEDCSR            0x0608
-#define  RIO_LTLEDCSR_IER       0x80000000
-#define  RIO_LTLEDCSR_PRT       0x01000000
+#define RIO_LTLEDCSR_IER        0x80000000
+#define RIO_LTLEDCSR_PRT        0x01000000
 #define RIO_LTLEECSR            0x060c
 #define RIO_EPWISR              0x10010
 #define RIO_ISR_AACR            0x10120
@@ -88,7 +106,10 @@
 #define RIO_IPWSR_PWD           0x00000008
 #define RIO_IPWSR_PWB           0x00000004
 
-#define RIO_EPWISR_PINT         0x80000000
+/* EPWISR Error match value */
+#define RIO_EPWISR_PINT1        0x80000000
+#define RIO_EPWISR_PINT2        0x40000000
+#define RIO_EPWISR_MU           0x00000002
 #define RIO_EPWISR_PW           0x00000001
 
 #define RIO_MSG_DESC_SIZE       32
@@ -1060,6 +1081,40 @@ static int fsl_rio_doorbell_init(struct rio_mport *mport)
         return rc;
 }
 
+static void port_error_handler(struct rio_mport *port, int offset)
+{
+        /*XXX: Error recovery is not implemented, we just clear errors */
+        out_be32((u32 *)(rio_regs_win + RIO_LTLEDCSR), 0);
+
+        if (offset == 0) {
+                out_be32((u32 *)(rio_regs_win + RIO_PORT1_EDCSR), 0);
+                out_be32((u32 *)(rio_regs_win + RIO_PORT1_IECSR), 0);
+                out_be32((u32 *)(rio_regs_win + RIO_ESCSR), ESCSR_CLEAR);
+        } else {
+                out_be32((u32 *)(rio_regs_win + RIO_PORT2_EDCSR), 0);
+                out_be32((u32 *)(rio_regs_win + RIO_PORT2_IECSR), 0);
+                out_be32((u32 *)(rio_regs_win + RIO_PORT2_ESCSR), ESCSR_CLEAR);
+        }
+}
+
+static void msg_unit_error_handler(struct rio_mport *port)
+{
+        struct rio_priv *priv = port->priv;
+
+        /*XXX: Error recovery is not implemented, we just clear errors */
+        out_be32((u32 *)(rio_regs_win + RIO_LTLEDCSR), 0);
+
+        out_be32((u32 *)(rio_regs_win + RIO_IM0SR), IMSR_CLEAR);
+        out_be32((u32 *)(rio_regs_win + RIO_IM1SR), IMSR_CLEAR);
+        out_be32((u32 *)(rio_regs_win + RIO_OM0SR), OMSR_CLEAR);
+        out_be32((u32 *)(rio_regs_win + RIO_OM1SR), OMSR_CLEAR);
+
+        out_be32(&priv->msg_regs->odsr, ODSR_CLEAR);
+        out_be32(&priv->msg_regs->dsr, IDSR_CLEAR);
+
+        out_be32(&priv->msg_regs->pwsr, IPWSR_CLEAR);
+}
+
 /**
  * fsl_rio_port_write_handler - MPC85xx port write interrupt handler
  * @irq: Linux interrupt number
@@ -1140,10 +1195,22 @@ fsl_rio_port_write_handler(int irq, void *dev_instance)
         }
 
 pw_done:
-        if (epwisr & RIO_EPWISR_PINT) {
+        if (epwisr & RIO_EPWISR_PINT1) {
+                tmp = in_be32(priv->regs_win + RIO_LTLEDCSR);
+                pr_debug("RIO_LTLEDCSR = 0x%x\n", tmp);
+                port_error_handler(port, 0);
+        }
+
+        if (epwisr & RIO_EPWISR_PINT2) {
+                tmp = in_be32(priv->regs_win + RIO_LTLEDCSR);
+                pr_debug("RIO_LTLEDCSR = 0x%x\n", tmp);
+                port_error_handler(port, 1);
+        }
+
+        if (epwisr & RIO_EPWISR_MU) {
                 tmp = in_be32(priv->regs_win + RIO_LTLEDCSR);
                 pr_debug("RIO_LTLEDCSR = 0x%x\n", tmp);
-                out_be32(priv->regs_win + RIO_LTLEDCSR, 0);
+                msg_unit_error_handler(port);
         }
 
         return IRQ_HANDLED;
@@ -1254,12 +1321,14 @@ static int fsl_rio_port_write_init(struct rio_mport *mport)
 
 
         /* Hook up port-write handler */
-        rc = request_irq(IRQ_RIO_PW(mport), fsl_rio_port_write_handler, 0,
-                         "port-write", (void *)mport);
+        rc = request_irq(IRQ_RIO_PW(mport), fsl_rio_port_write_handler,
+                        IRQF_SHARED, "port-write", (void *)mport);
         if (rc < 0) {
                 pr_err("MPC85xx RIO: unable to request inbound doorbell irq");
                 goto err_out;
         }
+        /* Enable Error Interrupt */
+        out_be32((u32 *)(rio_regs_win + RIO_LTLEECSR), LTLEECSR_ENABLE_ALL);
 
         INIT_WORK(&priv->pw_work, fsl_pw_dpc);
         spin_lock_init(&priv->pw_fifo_lock);