H300: Rudimentary driver for the ISP1362 USB on-the-go controller. For now it just sends the chip to sleep, solving the poor battery runtime issue.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@10128 a1c6a512-1295-4272-9138-f99709370657

1 files changed, 177 insertions, 0 deletions

diff --git a/firmware/drivers/isp1362.c b/firmware/drivers/isp1362.c
new file mode 100755
index 0000000..473c9dc
--- /dev/null
+++ b/firmware/drivers/isp1362.c
@@ -0,0 +1,177 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Copyright (C) 2006 Jens Arnold
+ *
+ * All files in this archive are subject to the GNU General Public License.
+ * See the file COPYING in the source tree root for full license agreement.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ****************************************************************************/
+
+#include "system.h"
+#include "kernel.h"
+#include "isp1362.h"
+
+#define HC_DATA (*((volatile unsigned short*)0xc0000000))
+#define HC_CMD  (*((volatile unsigned short*)0xc0000002))
+#define DC_DATA (*((volatile unsigned short*)0xc0000004))
+#define DC_CMD  (*((volatile unsigned short*)0xc0000006))
+
+/* host controller access */
+
+unsigned isp1362_read_hc_reg16(unsigned reg)
+{
+    HC_CMD = reg;
+
+    asm ("nop\n nop\n nop\n nop\n");
+    asm ("nop\n nop\n nop\n nop\n");
+    asm ("nop\n nop\n nop\n nop\n");
+
+    return HC_DATA;
+}
+
+unsigned isp1362_read_hc_reg32(unsigned reg)
+{
+    unsigned data;
+
+    HC_CMD = reg;
+
+    asm ("nop\n nop\n nop\n nop\n");
+    asm ("nop\n nop\n nop\n nop\n");
+    asm ("nop\n nop\n nop\n nop\n");
+
+    data = HC_DATA;
+    data |= HC_DATA << 16;
+    return data;
+}
+
+void isp1362_write_hc_reg16(unsigned reg, unsigned data)
+{
+    HC_CMD = reg | 0x80;
+
+    asm ("nop\n nop\n nop\n");
+
+    HC_DATA = data;
+}
+
+void isp1362_write_hc_reg32(unsigned reg, unsigned data)
+{
+    HC_CMD = reg | 0x80;
+
+    asm ("nop\n nop\n nop\n");
+
+    HC_DATA = data;
+    HC_DATA = data >> 16;
+}
+
+/* device controller access */
+
+unsigned isp1362_read_dc_reg16(unsigned reg)
+{
+    DC_CMD = reg;
+
+    asm ("nop\n nop\n nop\n nop\n");
+    asm ("nop\n nop\n nop\n nop\n");
+    asm ("nop\n nop\n nop\n nop\n");
+
+    return DC_DATA;
+}
+
+unsigned isp1362_read_dc_reg32(unsigned reg)
+{
+    unsigned data;
+
+    DC_CMD = reg;
+
+    asm ("nop\n nop\n nop\n nop\n");
+    asm ("nop\n nop\n nop\n nop\n");
+    asm ("nop\n nop\n nop\n nop\n");
+
+    data = DC_DATA;
+    data |= DC_DATA << 16;
+    return data;
+}
+
+void isp1362_write_dc_reg16(unsigned reg, unsigned data)
+{
+    DC_CMD = reg;
+
+    asm ("nop\n nop\n nop\n");
+
+    DC_DATA = data;
+}
+
+void isp1362_write_dc_reg32(unsigned reg, unsigned data)
+{
+    DC_CMD = reg;
+
+    asm ("nop\n nop\n nop\n");
+
+    DC_DATA = data;
+    DC_DATA = data >> 16;
+}
+
+static void isp1362_suspend(void)
+{
+    unsigned data;
+
+    data = isp1362_read_hc_reg16(ISP1362_OTG_CONTROL);
+    data &= ~0x0001;  /* DRV_VBUS = 0 */
+    isp1362_write_hc_reg16(ISP1362_OTG_CONTROL, data);
+
+    /* prepare the DC */
+    data = isp1362_read_dc_reg16(ISP1362_DC_HARDWARE_CONFIG_R);
+    data &= ~0x1008;  /* CLKRUN = WKUPCS = 0. Wakeup is still possible via /D_WAKEUP */
+    isp1362_write_dc_reg16(ISP1362_DC_HARDWARE_CONFIG_W, data);
+
+    /* send the DC to sleep */
+    data = isp1362_read_dc_reg16(ISP1362_DC_MODE_R);
+    data |=  0x20;  /* GOSUSP = 1 */
+    isp1362_write_dc_reg16(ISP1362_DC_MODE_W, data);
+    data &= ~0x20;  /* GOSUSP = 0 */
+    isp1362_write_dc_reg16(ISP1362_DC_MODE_W, data);
+
+    /* prepare the HC */
+    data = isp1362_read_hc_reg16(ISP1362_HC_HARDWARE_CONFIG);
+    data &= ~0x0800;  /* SuspendClkNotStop = 0 */
+    data |=  0x4001;  /* GlobalPowerDown = InterruptPinEnable = 1 */
+    isp1362_write_hc_reg16(ISP1362_HC_HARDWARE_CONFIG, data);
+
+    /* TODO: OTG wake-up cfg */
+    /* TODO: Interrupt setup */
+    
+    /* set the HC to operational */
+    isp1362_write_hc_reg32(ISP1362_HC_CONTROL, 0x0680);
+                           /* RWE = RWC = 1, HCFS = 0b10 (USBOperational) */
+    /* ..then send it to sleep */
+    isp1362_write_hc_reg32(ISP1362_HC_CONTROL, 0x06c0);
+                           /* RWE = RWC = 1, HCFS = 0b11 (USBSuspend) */
+}
+
+/* init */
+
+void isp1362_init(void)
+{
+    and_l(~0x00200080, &GPIO1_OUT);     /* disable 5V USB host power and ??? */
+    or_l(  0x00200080, &GPIO1_ENABLE);
+    or_l(  0x00200080, &GPIO1_FUNCTION);
+
+    or_l(  0x20600000, &GPIO_OUT);      /* ID = D_SUSPEND = /OTGMODE = 1 */
+    and_l(~0x04000000, &GPIO_OUT);      /* ?R26? = 0 */
+    or_l(  0x24600000, &GPIO_ENABLE);   /* ID, ?R26?, D_SUSPEND, /OTGMODE outputs */
+    and_l(~0x000000a8, &GPIO_ENABLE);   /* /INT2, /INT1, /RESET inputs */
+    or_l(  0x246000a8, &GPIO_FUNCTION); /* GPIO for these pins */
+
+    sleep(HZ/5);
+
+    isp1362_suspend();
+}