msm: subsystem_fatal_8x60: Separate out the modem and lpass drivers.
Change-Id: Ia50596cb4ffbc0b8f3d09ca3ee8914d7504e7f61
Signed-off-by: Vikram Mulukutla <markivx@codeaurora.org>
diff --git a/arch/arm/mach-msm/lpass-8660.c b/arch/arm/mach-msm/lpass-8660.c
new file mode 100644
index 0000000..36b8dcc
--- /dev/null
+++ b/arch/arm/mach-msm/lpass-8660.c
@@ -0,0 +1,166 @@
+/* Copyright (c) 2011, Code Aurora Forum. 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/interrupt.h>
+#include <linux/reboot.h>
+#include <linux/workqueue.h>
+#include <linux/io.h>
+#include <linux/jiffies.h>
+#include <linux/stringify.h>
+#include <linux/delay.h>
+#include <linux/module.h>
+
+#include <mach/irqs.h>
+#include <mach/scm.h>
+#include <mach/peripheral-loader.h>
+#include <mach/subsystem_restart.h>
+#include <mach/subsystem_notif.h>
+
+#include "smd_private.h"
+#include "modem_notifier.h"
+#include "ramdump.h"
+
+#define Q6SS_WDOG_ENABLE 0x28882024
+#define Q6SS_SOFT_INTR_WAKEUP 0x288A001C
+#define MODULE_NAME "lpass_8x60"
+#define SCM_Q6_NMI_CMD 0x1
+
+/* Subsystem restart: QDSP6 data, functions */
+static void *q6_ramdump_dev;
+static void q6_fatal_fn(struct work_struct *);
+static DECLARE_WORK(q6_fatal_work, q6_fatal_fn);
+
+static void q6_fatal_fn(struct work_struct *work)
+{
+ pr_err("%s: Watchdog bite received from Q6!\n", MODULE_NAME);
+ subsystem_restart("lpass");
+ enable_irq(LPASS_Q6SS_WDOG_EXPIRED);
+}
+
+static void send_q6_nmi(void)
+{
+ /* Send NMI to QDSP6 via an SCM call. */
+ uint32_t cmd = 0x1;
+ void __iomem *q6_wakeup_intr;
+
+ scm_call(SCM_SVC_UTIL, SCM_Q6_NMI_CMD,
+ &cmd, sizeof(cmd), NULL, 0);
+
+ /* Wakeup the Q6 */
+ q6_wakeup_intr = ioremap_nocache(Q6SS_SOFT_INTR_WAKEUP, 8);
+ writel_relaxed(0x2000, q6_wakeup_intr);
+ iounmap(q6_wakeup_intr);
+ mb();
+
+ /* Q6 requires atleast 100ms to dump caches etc.*/
+ msleep(100);
+
+ pr_info("subsystem-fatal-8x60: Q6 NMI was sent.\n");
+}
+
+int subsys_q6_shutdown(const struct subsys_data *crashed_subsys)
+{
+ void __iomem *q6_wdog_addr =
+ ioremap_nocache(Q6SS_WDOG_ENABLE, 8);
+
+ send_q6_nmi();
+ writel_relaxed(0x0, q6_wdog_addr);
+ /* The write needs to go through before the q6 is shutdown. */
+ mb();
+ iounmap(q6_wdog_addr);
+
+ pil_force_shutdown("q6");
+ disable_irq_nosync(LPASS_Q6SS_WDOG_EXPIRED);
+
+ if (get_restart_level() == RESET_SUBSYS_MIXED)
+ smsm_reset_modem(SMSM_RESET);
+
+ return 0;
+}
+
+int subsys_q6_powerup(const struct subsys_data *crashed_subsys)
+{
+ int ret = pil_force_boot("q6");
+ enable_irq(LPASS_Q6SS_WDOG_EXPIRED);
+ return ret;
+}
+
+/* FIXME: Get address, size from PIL */
+static struct ramdump_segment q6_segments[] = { {0x46700000, 0x47F00000 -
+ 0x46700000}, {0x28400000, 0x12800} };
+static int subsys_q6_ramdump(int enable,
+ const struct subsys_data *crashed_subsys)
+{
+ if (enable)
+ return do_ramdump(q6_ramdump_dev, q6_segments,
+ ARRAY_SIZE(q6_segments));
+ else
+ return 0;
+}
+
+void subsys_q6_crash_shutdown(const struct subsys_data *crashed_subsys)
+{
+ send_q6_nmi();
+}
+
+static irqreturn_t lpass_wdog_bite_irq(int irq, void *dev_id)
+{
+ int ret;
+
+ ret = schedule_work(&q6_fatal_work);
+ disable_irq_nosync(LPASS_Q6SS_WDOG_EXPIRED);
+
+ return IRQ_HANDLED;
+}
+
+static struct subsys_data subsys_8x60_q6 = {
+ .name = "lpass",
+ .shutdown = subsys_q6_shutdown,
+ .powerup = subsys_q6_powerup,
+ .ramdump = subsys_q6_ramdump,
+ .crash_shutdown = subsys_q6_crash_shutdown
+};
+
+static void __exit lpass_fatal_exit(void)
+{
+ free_irq(LPASS_Q6SS_WDOG_EXPIRED, NULL);
+}
+
+static int __init lpass_fatal_init(void)
+{
+ int ret;
+
+ ret = request_irq(LPASS_Q6SS_WDOG_EXPIRED, lpass_wdog_bite_irq,
+ IRQF_TRIGGER_RISING, "q6_wdog", NULL);
+
+ if (ret < 0) {
+ pr_err("%s: Unable to request LPASS_Q6SS_WDOG_EXPIRED irq.",
+ __func__);
+ goto out;
+ }
+
+ q6_ramdump_dev = create_ramdump_device("lpass");
+
+ if (!q6_ramdump_dev) {
+ ret = -ENOMEM;
+ goto out;
+ }
+
+ ret = ssr_register_subsystem(&subsys_8x60_q6);
+out:
+ return ret;
+}
+
+module_init(lpass_fatal_init);
+module_exit(lpass_fatal_exit);
+