From: Vaibhav Bedia <vaibhav.bedia@xxxxxx>
Interacting with WKUP-M3 requires some more control
module register writes. Add the register offsets and
APIs to write to these.
Signed-off-by: Vaibhav Bedia <vaibhav.bedia@xxxxxx>
Signed-off-by: Dave Gerlach <d-gerlach@xxxxxx>
---
arch/arm/mach-omap2/control.c | 57 +++++++++++++++++++++++++++++++++++++++++
arch/arm/mach-omap2/control.h | 54 ++++++++++++++++++++++++++++++++++++++
2 files changed, 111 insertions(+)
diff --git a/arch/arm/mach-omap2/control.c b/arch/arm/mach-omap2/control.c
index 31e0dfe..934041a 100644
--- a/arch/arm/mach-omap2/control.c
+++ b/arch/arm/mach-omap2/control.c
@@ -605,3 +605,60 @@ int omap3_ctrl_save_padconf(void)
}
#endif /* CONFIG_ARCH_OMAP3 && CONFIG_PM */
+
+#if defined(CONFIG_SOC_AM33XX) && defined(CONFIG_PM)
+void am33xx_txev_eoi(void)
+{
+ omap_ctrl_writel(AM33XX_M3_TXEV_ACK, AM33XX_CONTROL_M3_TXEV_EOI);
+}
+
+void am33xx_txev_enable(void)
+{
+ omap_ctrl_writel(AM33XX_M3_TXEV_ENABLE, AM33XX_CONTROL_M3_TXEV_EOI);
+}
+
+/*
+ * Invalidate M3 firmware version before hardreset.
+ * Write invalid version in lower 4 nibbles of parameter
+ * register (ipc_regs + 0x8).
+ */
+void am33xx_pm_version_clear(void)
+{
+ omap_ctrl_writel(0xffff0000, AM33XX_CONTROL_IPC_MSG_REG2);
+}
+
+int am33xx_pm_version_get(void)
+{
+ return omap_ctrl_readl(AM33XX_CONTROL_IPC_MSG_REG2) & M3_VERSION_MASK;
+}
+
+void am33xx_pm_ipc_cmd(struct am33xx_ipc_data *data)
+{
+ omap_ctrl_writel(data->resume_addr, AM33XX_CONTROL_IPC_MSG_REG0);
+ omap_ctrl_writel(data->sleep_mode, AM33XX_CONTROL_IPC_MSG_REG1);
+ omap_ctrl_writel(data->param1, AM33XX_CONTROL_IPC_MSG_REG2);
+ omap_ctrl_writel(data->param2, AM33XX_CONTROL_IPC_MSG_REG3);
+ omap_ctrl_writel(data->param3, AM33XX_CONTROL_IPC_MSG_REG4);
+}
+
+int am33xx_pm_status(void)
+{
+ int i;
+
+ i = omap_ctrl_readl(AM33XX_CONTROL_IPC_MSG_REG1);
+ i &= IPC_RESP_MASK;
+ i >>= __ffs(IPC_RESP_MASK);
+
+ return i;
+}
+
+int am33xx_pm_wake_src(void)
+{
+ int i;
+
+ i = omap_ctrl_readl(AM33XX_CONTROL_IPC_MSG_REG6);
+ i &= 0xff;
+
+ return i;
+}
+#endif /* CONFIG_SOC_AM33XX && CONFIG_PM */
diff --git a/arch/arm/mach-omap2/control.h b/arch/arm/mach-omap2/control.h
index f7d7c2e..9be587c 100644
--- a/arch/arm/mach-omap2/control.h
+++ b/arch/arm/mach-omap2/control.h
@@ -370,6 +370,22 @@
#define AM33XX_DEV_FEATURE 0x604
#define AM33XX_SGX_MASK BIT(29)
+/* AM33XX M3_TXEV_EOI register */
+#define AM33XX_CONTROL_M3_TXEV_EOI 0x1324
+
+#define AM33XX_M3_TXEV_ACK (0x1 << 0)
+#define AM33XX_M3_TXEV_ENABLE (0x0 << 0)
+
+/* AM33XX IPC message registers */
+#define AM33XX_CONTROL_IPC_MSG_REG0 0x1328
+#define AM33XX_CONTROL_IPC_MSG_REG1 0x132C
+#define AM33XX_CONTROL_IPC_MSG_REG2 0x1330
+#define AM33XX_CONTROL_IPC_MSG_REG3 0x1334
+#define AM33XX_CONTROL_IPC_MSG_REG4 0x1338
+#define AM33XX_CONTROL_IPC_MSG_REG5 0x133C
+#define AM33XX_CONTROL_IPC_MSG_REG6 0x1340
+#define AM33XX_CONTROL_IPC_MSG_REG7 0x1344
+
/* CONTROL OMAP STATUS register to identify OMAP3 features */
#define OMAP3_CONTROL_OMAP_STATUS 0x044c
@@ -429,6 +445,44 @@ extern void omap3630_ctrl_disable_rta(void);
extern int omap3_ctrl_save_padconf(void);
extern void omap2_set_globals_control(void __iomem *ctrl,
void __iomem *ctrl_pad);
+struct am33xx_ipc_data {
+ u32 resume_addr;
+ u32 sleep_mode;
+ u32 param1;
+ u32 param2;
+ u32 param3;
+ u32 param4;
+ u32 param5;
+ u32 param6;
+};
+
+#define IPC_RESP_SHIFT 16
+#define IPC_RESP_MASK (0xffff << 16)
+
+#define M3_VERSION_SHIFT 0
+#define M3_VERSION_MASK (0xffff << 0)
+
+/*
+ * 9-4 = VTT GPIO PIN (6 Bits)
+ * 3 = VTT Status (1 Bit)
+ * 2-0 = Memory Type (2 Bits)
+*/
+#define MEM_TYPE_SHIFT (0x0)
+#define MEM_TYPE_MASK (0x7 << 0)
+#define VTT_STAT_SHIFT (0x3)
+#define VTT_STAT_MASK (0x1 << 3)
+#define VTT_GPIO_PIN_SHIFT (0x4)
+#define VTT_GPIO_PIN_MASK (0x2f << 4)
+
+extern void am33xx_wkup_m3_ipc_cmd(struct am33xx_ipc_data *data);
+extern void am33xx_txev_eoi(void);
+extern void am33xx_txev_enable(void);
+extern void am33xx_pm_version_clear(void);
+extern int am33xx_pm_version_get(void);
+extern void am33xx_pm_ipc_cmd(struct am33xx_ipc_data *data);
+extern int am33xx_pm_status(void);
+extern int am33xx_pm_wake_src(void);
+
#else
#define omap_ctrl_base_get() 0
#define omap_ctrl_readb(x) 0
--
1.7.9.5
--
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