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-rw-r--r--firmware/SOURCES1
-rw-r--r--firmware/target/arm/imx233/pwm-imx233.c64
-rw-r--r--firmware/target/arm/imx233/pwm-imx233.h68
-rw-r--r--firmware/target/arm/imx233/system-imx233.c2
4 files changed, 135 insertions, 0 deletions
diff --git a/firmware/SOURCES b/firmware/SOURCES
index 81f7d87..facf977 100644
--- a/firmware/SOURCES
+++ b/firmware/SOURCES
@@ -515,6 +515,7 @@ target/arm/imx233/power-imx233.c
target/arm/imx233/powermgmt-imx233.c
target/arm/imx233/adc-imx233.c
target/arm/imx233/lradc-imx233.c
+target/arm/imx233/pwm-imx233.c
target/arm/imx233/rtc-imx233.c
target/arm/imx233/dcp-imx233.c
#ifndef BOOTLOADER
diff --git a/firmware/target/arm/imx233/pwm-imx233.c b/firmware/target/arm/imx233/pwm-imx233.c
new file mode 100644
index 0000000..1c5e465
--- /dev/null
+++ b/firmware/target/arm/imx233/pwm-imx233.c
@@ -0,0 +1,64 @@
+/***************************************************************************
+ * __________ __ ___.
+ * Open \______ \ ____ ____ | | _\_ |__ _______ ___
+ * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
+ * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
+ * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
+ * \/ \/ \/ \/ \/
+ * $Id$
+ *
+ * Copyright (C) 2011 by Amaury Pouly
+ *
+ * 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 software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ****************************************************************************/
+#include "pwm-imx233.h"
+#include "clkctrl-imx233.h"
+#include "pinctrl-imx233.h"
+
+void imx233_pwm_init(void)
+{
+ imx233_reset_block(&HW_PWM_CTRL);
+ imx233_clkctrl_enable_xtal(XTAM_PWM, true);
+}
+
+bool imx233_pwm_is_channel_enable(int channel)
+{
+ return HW_PWM_CTRL & HW_PWM_CTRL__PWMx_ENABLE(channel);
+}
+
+void imx233_pwm_enable_channel(int channel, bool enable)
+{
+ if(enable)
+ __REG_SET(HW_PWM_CTRL) = HW_PWM_CTRL__PWMx_ENABLE(channel);
+ else
+ __REG_CLR(HW_PWM_CTRL) = HW_PWM_CTRL__PWMx_ENABLE(channel);
+}
+
+void imx233_pwm_setup_channel(int channel, int period, int cdiv, int active,
+ int active_state, int inactive, int inactive_state)
+{
+ /* stop */
+ bool enable = imx233_pwm_is_channel_enable(channel);
+ if(enable)
+ imx233_pwm_enable_channel(channel, false);
+ /* setup pin */
+ imx233_set_pin_function(IMX233_PWM_PIN_BANK(channel), IMX233_PWM_PIN(channel),
+ PINCTRL_FUNCTION_MAIN);
+ imx233_set_pin_drive_strength(IMX233_PWM_PIN_BANK(channel), IMX233_PWM_PIN(channel),
+ PINCTRL_DRIVE_4mA);
+ /* watch the order ! active THEN period */
+ HW_PWM_ACTIVEx(channel) = active << HW_PWM_ACTIVEx__ACTIVE_BP |
+ inactive << HW_PWM_ACTIVEx__INACTIVE_BP;
+ HW_PWM_PERIODx(channel) = period | active_state << HW_PWM_PERIODx__ACTIVE_STATE_BP |
+ inactive_state << HW_PWM_PERIODx__INACTIVE_STATE_BP |
+ cdiv << HW_PWM_PERIODx__CDIV_BP;
+ /* restore */
+ imx233_pwm_enable_channel(channel, enable);
+}
diff --git a/firmware/target/arm/imx233/pwm-imx233.h b/firmware/target/arm/imx233/pwm-imx233.h
new file mode 100644
index 0000000..48c7811
--- /dev/null
+++ b/firmware/target/arm/imx233/pwm-imx233.h
@@ -0,0 +1,68 @@
+/***************************************************************************
+ * __________ __ ___.
+ * Open \______ \ ____ ____ | | _\_ |__ _______ ___
+ * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
+ * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
+ * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
+ * \/ \/ \/ \/ \/
+ * $Id$
+ *
+ * Copyright (C) 2011 by Amaury Pouly
+ *
+ * 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 software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ****************************************************************************/
+#ifndef __PWM_IMX233_H__
+#define __PWM_IMX233_H__
+
+#include "system.h"
+
+#define HW_PWM_BASE 0x80064000
+
+#define HW_PWM_CTRL (*(volatile uint32_t *)(HW_PWM_BASE + 0x0))
+#define HW_PWM_CTRL__PWMx_ENABLE(x) (1 << (x))
+
+#define HW_PWM_ACTIVEx(x) (*(volatile uint32_t *)(HW_PWM_BASE + 0x10 + (x) * 0x20))
+#define HW_PWM_ACTIVEx__ACTIVE_BP 0
+#define HW_PWM_ACTIVEx__ACTIVE_BM 0xffff
+#define HW_PWM_ACTIVEx__INACTIVE_BP 16
+#define HW_PWM_ACTIVEx__INACTIVE_BM 0xffff0000
+
+#define HW_PWM_PERIODx(x) (*(volatile uint32_t *)(HW_PWM_BASE + 0x20 + (x) * 0x20))
+#define HW_PWM_PERIODx__PERIOD_BP 0
+#define HW_PWM_PERIODx__PERIOD_BM 0xffff
+#define HW_PWM_PERIODx__ACTIVE_STATE_BP 16
+#define HW_PWM_PERIODx__ACTIVE_STATE_BM (0x3 << 16)
+#define HW_PWM_PERIODx__INACTIVE_STATE_BP 18
+#define HW_PWM_PERIODx__INACTIVE_STATE_BM (0x3 << 18)
+#define HW_PWM_PERIODx__CDIV_BP 20
+#define HW_PWM_PERIODx__CDIV_BM (0x7 << 20)
+#define HW_PWM_PERIODx__CDIV__DIV_1 0
+#define HW_PWM_PERIODx__CDIV__DIV_2 1
+#define HW_PWM_PERIODx__CDIV__DIV_4 2
+#define HW_PWM_PERIODx__CDIV__DIV_8 3
+#define HW_PWM_PERIODx__CDIV__DIV_16 4
+#define HW_PWM_PERIODx__CDIV__DIV_64 5
+#define HW_PWM_PERIODx__CDIV__DIV_256 6
+#define HW_PWM_PERIODx__CDIV__DIV_1024 7
+
+#define HW_PWM_PERIODx__STATE__HI_Z 0
+#define HW_PWM_PERIODx__STATE__LOW 2
+#define HW_PWM_PERIODx__STATE__HIGH 3
+
+#define IMX233_PWM_PIN_BANK(channel) 1
+#define IMX233_PWM_PIN(channel) (26 + (channel))
+
+void imx233_pwm_init(void);
+void imx233_pwm_setup_channel(int channel, int period, int cdiv, int active,
+ int active_state, int inactive, int inactive_state);
+void imx233_pwm_enable_channel(int channel, bool enable);
+bool imx233_pwm_is_channel_enable(int channel);
+
+#endif /* __PWM_IMX233_H__ */
diff --git a/firmware/target/arm/imx233/system-imx233.c b/firmware/target/arm/imx233/system-imx233.c
index a06ecab..eb9a3f8 100644
--- a/firmware/target/arm/imx233/system-imx233.c
+++ b/firmware/target/arm/imx233/system-imx233.c
@@ -31,6 +31,7 @@
#include "ssp-imx233.h"
#include "i2c-imx233.h"
#include "dcp-imx233.h"
+#include "pwm-imx233.h"
#include "icoll-imx233.h"
#include "lradc-imx233.h"
#include "rtc-imx233.h"
@@ -99,6 +100,7 @@ void system_init(void)
imx233_dma_init();
imx233_ssp_init();
imx233_dcp_init();
+ imx233_pwm_init();
imx233_lradc_init();
imx233_i2c_init();
#if defined(SANSA_FUZEPLUS) && !defined(BOOTLOADER)
generated by cgit v1.1 at 2026-05-09 05:21:15 +0000