Sansa Fuze+: initial commit (bootloader only, LCD basically working)

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@29808 a1c6a512-1295-4272-9138-f99709370657

1 files changed, 171 insertions, 0 deletions

diff --git a/firmware/target/arm/imx233/lcdif-imx233.c b/firmware/target/arm/imx233/lcdif-imx233.c
new file mode 100644
index 0000000000..0b96cbf2bc
--- /dev/null
+++ b/firmware/target/arm/imx233/lcdif-imx233.c
@@ -0,0 +1,171 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   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 "lcdif-imx233.h"
+
+static unsigned lcdif_word_length = 0;
+static unsigned lcdif_byte_packing = 0;
+
+void imx233_lcdif_enable_bus_master(bool enable)
+{
+    if(enable)
+        __REG_SET(HW_LCDIF_CTRL) = HW_LCDIF_CTRL__LCDIF_MASTER;
+    else
+        __REG_CLR(HW_LCDIF_CTRL) = HW_LCDIF_CTRL__LCDIF_MASTER;
+}
+
+void imx233_lcdif_enable(bool enable)
+{
+    if(enable)
+        __REG_CLR(HW_LCDIF_CTRL) = __BLOCK_CLKGATE;
+    else
+        __REG_SET(HW_LCDIF_CTRL) = __BLOCK_CLKGATE;
+}
+
+void imx233_lcdif_reset(void)
+{
+    //imx233_reset_block(&HW_LCDIF_CTRL);// doesn't work
+    while(HW_LCDIF_CTRL & __BLOCK_CLKGATE)
+        HW_LCDIF_CTRL &= ~__BLOCK_CLKGATE;
+    while(!(HW_LCDIF_CTRL & __BLOCK_SFTRST))
+        HW_LCDIF_CTRL |= __BLOCK_SFTRST;
+    while(HW_LCDIF_CTRL & __BLOCK_CLKGATE)
+        HW_LCDIF_CTRL &= ~__BLOCK_CLKGATE;
+    while(HW_LCDIF_CTRL & __BLOCK_SFTRST)
+        HW_LCDIF_CTRL &= ~__BLOCK_SFTRST;
+    while(HW_LCDIF_CTRL & __BLOCK_CLKGATE)
+        HW_LCDIF_CTRL &= ~__BLOCK_CLKGATE;
+    __REG_SET(HW_LCDIF_CTRL1) = HW_LCDIF_CTRL1__RESET;
+}
+
+void imx233_lcdif_set_timings(unsigned data_setup, unsigned data_hold,
+    unsigned cmd_setup, unsigned cmd_hold)
+{
+    HW_LCDIF_TIMING = (data_setup << HW_LCDIF_TIMING__DATA_SETUP_BP) |
+        (data_hold << HW_LCDIF_TIMING__DATA_HOLD_BP) |
+        (cmd_setup << HW_LCDIF_TIMING__CMD_SETUP_BP) |
+        (cmd_hold << HW_LCDIF_TIMING__CMD_HOLD_BP);
+}
+
+void imx233_lcdif_set_lcd_databus_width(unsigned width)
+{
+    __REG_CLR(HW_LCDIF_CTRL) = HW_LCDIF_CTRL__LCD_DATABUS_WIDTH_BM;
+    __REG_SET(HW_LCDIF_CTRL) = width;
+}
+
+void imx233_lcdif_set_word_length(unsigned word_length)
+{
+    __REG_CLR(HW_LCDIF_CTRL) = HW_LCDIF_CTRL__WORD_LENGTH_BM;
+    __REG_SET(HW_LCDIF_CTRL) = word_length;
+    lcdif_word_length = word_length;
+}
+
+unsigned imx233_lcdif_enable_irqs(unsigned irq_bm)
+{
+    unsigned old_msk = (HW_LCDIF_CTRL1 & HW_LCDIF_CTRL1__IRQ_EN_BM) >>HW_LCDIF_CTRL1__IRQ_EN_BP ;
+    /* clear irq status */
+    __REG_CLR(HW_LCDIF_CTRL1) = irq_bm << HW_LCDIF_CTRL1__IRQ_BP;
+    /* disable irqs */
+    __REG_CLR(HW_LCDIF_CTRL1) = HW_LCDIF_CTRL1__IRQ_EN_BM;
+    /* enable irqs */
+    __REG_SET(HW_LCDIF_CTRL1) = irq_bm << HW_LCDIF_CTRL1__IRQ_EN_BP;
+
+    return old_msk;
+}
+
+void imx233_lcdif_set_byte_packing_format(unsigned byte_packing)
+{
+    __REG_CLR(HW_LCDIF_CTRL1) = HW_LCDIF_CTRL1__BYTE_PACKING_FORMAT_BM;
+    __REG_SET(HW_LCDIF_CTRL1) = byte_packing << HW_LCDIF_CTRL1__BYTE_PACKING_FORMAT_BP;
+    lcdif_byte_packing = byte_packing;
+}
+
+void imx233_lcdif_set_data_format(bool data_fmt_16, bool data_fmt_18, bool data_fmt_24)
+{
+    if(data_fmt_16)
+        __REG_SET(HW_LCDIF_CTRL) = HW_LCDIF_CTRL__DATA_FORMAT_16_BIT;
+    else
+        __REG_CLR(HW_LCDIF_CTRL) = HW_LCDIF_CTRL__DATA_FORMAT_16_BIT;
+    if(data_fmt_18)
+        __REG_SET(HW_LCDIF_CTRL) = HW_LCDIF_CTRL__DATA_FORMAT_18_BIT;
+    else
+        __REG_CLR(HW_LCDIF_CTRL) = HW_LCDIF_CTRL__DATA_FORMAT_18_BIT;
+    if(data_fmt_24)
+        __REG_SET(HW_LCDIF_CTRL) = HW_LCDIF_CTRL__DATA_FORMAT_24_BIT;
+    else
+        __REG_CLR(HW_LCDIF_CTRL) = HW_LCDIF_CTRL__DATA_FORMAT_24_BIT;
+}
+
+void imx233_lcdif_wait_ready(void)
+{
+    while(HW_LCDIF_CTRL & HW_LCDIF_CTRL__RUN);
+}
+
+void imx233_lcdif_pio_send(bool data_mode, unsigned len, uint32_t *buf)
+{
+    unsigned max_xfer_size = 0xffff;
+    if(len == 0)
+        return;
+    if(lcdif_word_length == HW_LCDIF_CTRL__WORD_LENGTH_16_BIT)
+        max_xfer_size = 0x1fffe;
+    imx233_lcdif_wait_ready();
+    unsigned msk = imx233_lcdif_enable_irqs(0);
+    imx233_lcdif_enable_bus_master(false);
+
+    do
+    {
+        unsigned burst = MIN(len, max_xfer_size);
+        len -= burst;
+        unsigned count = burst;
+        if(lcdif_word_length != HW_LCDIF_CTRL__WORD_LENGTH_8_BIT)
+        {
+            if(burst & 1)
+                burst++;
+            count = burst / 2;
+        }
+        else
+            count = burst;
+        HW_LCDIF_TRANSFER_COUNT = 0;
+        HW_LCDIF_TRANSFER_COUNT = 0x10000 | count;
+        __REG_CLR(HW_LCDIF_CTRL) = HW_LCDIF_CTRL__DATA_SELECT | HW_LCDIF_CTRL__RUN;
+        if(data_mode)
+            __REG_SET(HW_LCDIF_CTRL) = HW_LCDIF_CTRL__DATA_SELECT;
+        __REG_SET(HW_LCDIF_CTRL) = HW_LCDIF_CTRL__RUN;
+        burst = (burst + 3) / 4;
+        while(burst-- > 0)
+        {
+            while(HW_LCDIF_STAT & HW_LCDIF_STAT__LFIFO_FULL);
+            HW_LCDIF_DATA = *buf++;
+        }
+        while(HW_LCDIF_CTRL & HW_LCDIF_CTRL__RUN);
+    }while(len > 0);
+    imx233_lcdif_enable_bus_master(true);
+    imx233_lcdif_enable_irqs(msk);
+}
+
+void imx233_lcdif_dma_send(void *buf, unsigned width, unsigned height)
+{
+    HW_LCDIF_CUR_BUF = (uint32_t)buf;
+    HW_LCDIF_TRANSFER_COUNT = 0;
+    HW_LCDIF_TRANSFER_COUNT = (height << 16) | width;
+    __REG_CLR(HW_LCDIF_CTRL) = HW_LCDIF_CTRL__RUN;
+    __REG_SET(HW_LCDIF_CTRL) = HW_LCDIF_CTRL__DATA_SELECT;
+    __REG_SET(HW_LCDIF_CTRL) = HW_LCDIF_CTRL__RUN;
+}