From: Hari Kanigeri <h-kanigeri2@xxxxxx>
Introduce OMAP4 machine-dependent module required
for starting and stopping the OMAP3 remote processors.
Signed-off-by: Hari Kanigeri <h-kanigeri2@xxxxxx>
Signed-off-by: Ohad Ben-Cohen <ohadb@xxxxxx>
---
arch/arm/mach-omap2/remoteproc44xx.c | 196 ++++++++++++++++++++++++++++++++++
1 files changed, 196 insertions(+), 0 deletions(-)
create mode 100644 arch/arm/mach-omap2/remoteproc44xx.c
diff --git a/arch/arm/mach-omap2/remoteproc44xx.c b/arch/arm/mach-omap2/remoteproc44xx.c
new file mode 100644
index 0000000..e240595
--- /dev/null
+++ b/arch/arm/mach-omap2/remoteproc44xx.c
@@ -0,0 +1,196 @@
+/*
+ * Remote Processor machine-specific module for OMAP4
+ *
+ * Copyright (C) 2010 Texas Instruments Inc.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * 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.
+ *
+ * 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., 51 Franklin St, Fifth Floor, Boston, MA
+ * 02110-1301 USA
+ *
+ */
+/* this is needed for multi-omap support */
+#ifdef CONFIG_ARCH_OMAP4
+#include <linux/kernel.h>
+#include <linux/delay.h>
+#include <linux/clk.h>
+#include <linux/err.h>
+#include <linux/platform_device.h>
+#include <linux/io.h>
+#include <linux/pm_runtime.h>
+#include <plat/remoteproc.h>
+#include <mach/irqs.h>
+#include <plat/omap_device.h>
+
+#include "cm.h"
+#include "prm.h"
+
+#define RM_M3_RST1ST 0x1
+#define RM_M3_RST2ST 0x2
+#define RM_M3_RST3ST 0x4
+#define RM_M3_REL_RST1_MASK 0x2
+#define RM_M3_REL_RST2_MASK 0x0
+#define RM_M3_AST_RST1_MASK 0x3
+#define RM_M3_AST_RST2_MASK 0x2
+
+#define M3_CLK_MOD_MODE_HW_AUTO 0x1
+#define M3_CLKTRCTRL_SW_WKUP 0x2
+#define M3_CLKTRCTRL_SW_SLEEP 0x1
+#define M3_CLKACTIVITY_MPU_M3_CLK 0x100
+
+static inline int omap4_rproc_get_state(struct omap_rproc *rproc)
+{
+ return rproc->state;
+}
+
+static inline int proc44x_sysm3_start(struct device *dev, u32 start_addr)
+{
+ u32 reg;
+ int counter = 10;
+
+ /* Module is managed automatically by HW */
+ cm_write_mod_reg(M3_CLK_MOD_MODE_HW_AUTO, OMAP4430_CM2_CORE_MOD,
+ OMAP4_CM_DUCATI_DUCATI_CLKCTRL_OFFSET);
+
+ /* Enable the M3 clock */
+ cm_write_mod_reg(M3_CLKTRCTRL_SW_WKUP, OMAP4430_CM2_CORE_MOD,
+ OMAP4_CM_DUCATI_CLKSTCTRL_OFFSET);
+ do {
+ reg = cm_read_mod_reg(OMAP4430_CM2_CORE_MOD,
+ OMAP4_CM_DUCATI_CLKSTCTRL_OFFSET);
+ if (reg & M3_CLKACTIVITY_MPU_M3_CLK) {
+ dev_info(dev, "M3 clock enabled:"
+ "OMAP4430_CM_DUCATI_CLKSTCTRL = 0x%x\n", reg);
+ break;
+ }
+ msleep(1);
+ } while (--counter);
+ if (counter == 0) {
+ dev_info(dev, "FAILED TO ENABLE DUCATI M3 CLOCK !%x\n", reg);
+ return -EFAULT;
+ }
+
+ /* De-assert RST1, and clear the Reset status */
+ dev_info(dev, "De-assert RST1\n");
+ prm_write_mod_reg(RM_M3_REL_RST1_MASK, OMAP4430_PRM_CORE_MOD,
+ OMAP4_RM_DUCATI_RSTCTRL_OFFSET);
+ while (!(prm_read_mod_reg(OMAP4430_PRM_CORE_MOD,
+ OMAP4_RM_DUCATI_RSTST_OFFSET) & RM_M3_RST1ST))
+ ;
+ dev_info(dev, "RST1 released!");
+
+ prm_write_mod_reg(RM_M3_RST1ST, OMAP4430_PRM_CORE_MOD,
+ OMAP4_RM_DUCATI_RSTST_OFFSET);
+
+ return 0;
+}
+
+static inline int proc44x_appm3_start(struct device *dev, u32 start_addr)
+{
+ /* De-assert RST2, and clear the Reset status */
+ dev_info(dev, "De-assert RST2\n");
+ prm_write_mod_reg(RM_M3_REL_RST2_MASK, OMAP4430_PRM_CORE_MOD,
+ OMAP4_RM_DUCATI_RSTCTRL_OFFSET);
+
+ while (!(prm_read_mod_reg(OMAP4430_PRM_CORE_MOD,
+ OMAP4_RM_DUCATI_RSTST_OFFSET) & RM_M3_RST2ST))
+ ;
+ dev_info(dev, "RST2 released!");
+
+ prm_write_mod_reg(RM_M3_RST2ST, OMAP4430_PRM_CORE_MOD,
+ OMAP4_RM_DUCATI_RSTST_OFFSET);
+
+ return 0;
+}
+
+static inline int proc44x_sysm3_stop(struct device *dev)
+{
+ dev_info(dev, "assert RST1\n");
+ prm_write_mod_reg(RM_M3_AST_RST1_MASK, OMAP4430_PRM_CORE_MOD,
+ OMAP4_RM_DUCATI_RSTCTRL_OFFSET);
+ /* Disable the M3 clock */
+ cm_write_mod_reg(M3_CLKTRCTRL_SW_SLEEP, OMAP4430_CM2_CORE_MOD,
+ OMAP4_CM_DUCATI_CLKSTCTRL_OFFSET);
+
+ return 0;
+}
+
+static inline int proc44x_appm3_stop(struct device *dev)
+{
+ dev_info(dev, "assert RST2\n");
+ prm_write_mod_reg(RM_M3_AST_RST2_MASK, OMAP4430_PRM_CORE_MOD,
+ OMAP4_RM_DUCATI_RSTCTRL_OFFSET);
+
+ return 0;
+}
+
+static struct omap_rproc_ops omap4_ducati0_ops = {
+ .start = proc44x_sysm3_start,
+ .stop = proc44x_sysm3_stop,
+ .get_state = omap4_rproc_get_state,
+};
+
+static struct omap_rproc_ops omap4_ducati1_ops = {
+ .start = proc44x_appm3_start,
+ .stop = proc44x_appm3_stop,
+ .get_state = omap4_rproc_get_state,
+};
+
+static struct omap_rproc_ops omap4_tesla_ops = {
+ .start = NULL,
+ .stop = NULL,
+ .get_state = NULL,
+};
+
+static struct omap_rproc_platform_data omap4_rproc_data[] = {
+ {
+ .name = "tesla",
+ .ops = &omap4_tesla_ops,
+ .oh_name = "tesla_hwmod",
+ },
+ {
+ .name = "ducati-proc0",
+ .ops = &omap4_ducati0_ops,
+ .oh_name = "ducati_hwmod0",
+ },
+ {
+ .name = "ducati-proc1",
+ .ops = &omap4_ducati1_ops,
+ .oh_name = "ducati_hwmod1",
+ },
+};
+
+struct omap_rproc_platform_data *omap4_get_rproc_data(void)
+{
+ return omap4_rproc_data;
+}
+
+int omap4_get_rproc_data_size(void)
+{
+ return ARRAY_SIZE(omap4_rproc_data);
+}
+#else
+struct omap_rproc_platform_data *omap4_get_rproc_data(void)
+{
+ return NULL;
+}
+
+int omap4_get_rproc_data_size(void)
+{
+ return 0;
+}
+#endif
+
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("OMAP4 Remote Processor module");
+MODULE_AUTHOR("Hari Kanigeri <h-kanigeri2@xxxxxx>");
+MODULE_AUTHOR("Ohad Ben-Cohen <ohad@xxxxxxxxxx>");
--
1.7.0.4
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