forked from len0rd/rockbox
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
This commit is contained in:
Jens Arnold
parent
cd69996450
commit
977169ea7a
8 changed files with 355 additions and 7 deletions
177
firmware/drivers/isp1362.c
Executable file
177
firmware/drivers/isp1362.c
Executable file
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/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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* $Id$
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*
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* Copyright (C) 2006 Jens Arnold
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*
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* All files in this archive are subject to the GNU General Public License.
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* See the file COPYING in the source tree root for full license agreement.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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#include "system.h"
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#include "kernel.h"
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#include "isp1362.h"
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#define HC_DATA (*((volatile unsigned short*)0xc0000000))
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#define HC_CMD (*((volatile unsigned short*)0xc0000002))
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#define DC_DATA (*((volatile unsigned short*)0xc0000004))
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#define DC_CMD (*((volatile unsigned short*)0xc0000006))
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/* host controller access */
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unsigned isp1362_read_hc_reg16(unsigned reg)
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{
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HC_CMD = reg;
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asm ("nop\n nop\n nop\n nop\n");
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asm ("nop\n nop\n nop\n nop\n");
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asm ("nop\n nop\n nop\n nop\n");
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return HC_DATA;
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}
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unsigned isp1362_read_hc_reg32(unsigned reg)
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{
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unsigned data;
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HC_CMD = reg;
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asm ("nop\n nop\n nop\n nop\n");
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asm ("nop\n nop\n nop\n nop\n");
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asm ("nop\n nop\n nop\n nop\n");
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data = HC_DATA;
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data |= HC_DATA << 16;
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return data;
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}
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void isp1362_write_hc_reg16(unsigned reg, unsigned data)
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{
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HC_CMD = reg | 0x80;
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asm ("nop\n nop\n nop\n");
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HC_DATA = data;
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}
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void isp1362_write_hc_reg32(unsigned reg, unsigned data)
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{
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HC_CMD = reg | 0x80;
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asm ("nop\n nop\n nop\n");
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HC_DATA = data;
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HC_DATA = data >> 16;
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}
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/* device controller access */
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unsigned isp1362_read_dc_reg16(unsigned reg)
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{
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DC_CMD = reg;
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asm ("nop\n nop\n nop\n nop\n");
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asm ("nop\n nop\n nop\n nop\n");
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asm ("nop\n nop\n nop\n nop\n");
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return DC_DATA;
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}
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unsigned isp1362_read_dc_reg32(unsigned reg)
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{
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unsigned data;
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DC_CMD = reg;
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asm ("nop\n nop\n nop\n nop\n");
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asm ("nop\n nop\n nop\n nop\n");
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asm ("nop\n nop\n nop\n nop\n");
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data = DC_DATA;
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data |= DC_DATA << 16;
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return data;
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}
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void isp1362_write_dc_reg16(unsigned reg, unsigned data)
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{
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DC_CMD = reg;
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asm ("nop\n nop\n nop\n");
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DC_DATA = data;
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}
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void isp1362_write_dc_reg32(unsigned reg, unsigned data)
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{
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DC_CMD = reg;
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asm ("nop\n nop\n nop\n");
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DC_DATA = data;
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DC_DATA = data >> 16;
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}
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static void isp1362_suspend(void)
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{
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unsigned data;
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data = isp1362_read_hc_reg16(ISP1362_OTG_CONTROL);
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data &= ~0x0001; /* DRV_VBUS = 0 */
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isp1362_write_hc_reg16(ISP1362_OTG_CONTROL, data);
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/* prepare the DC */
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data = isp1362_read_dc_reg16(ISP1362_DC_HARDWARE_CONFIG_R);
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data &= ~0x1008; /* CLKRUN = WKUPCS = 0. Wakeup is still possible via /D_WAKEUP */
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isp1362_write_dc_reg16(ISP1362_DC_HARDWARE_CONFIG_W, data);
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/* send the DC to sleep */
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data = isp1362_read_dc_reg16(ISP1362_DC_MODE_R);
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data |= 0x20; /* GOSUSP = 1 */
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isp1362_write_dc_reg16(ISP1362_DC_MODE_W, data);
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data &= ~0x20; /* GOSUSP = 0 */
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isp1362_write_dc_reg16(ISP1362_DC_MODE_W, data);
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/* prepare the HC */
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data = isp1362_read_hc_reg16(ISP1362_HC_HARDWARE_CONFIG);
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data &= ~0x0800; /* SuspendClkNotStop = 0 */
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data |= 0x4001; /* GlobalPowerDown = InterruptPinEnable = 1 */
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isp1362_write_hc_reg16(ISP1362_HC_HARDWARE_CONFIG, data);
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/* TODO: OTG wake-up cfg */
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/* TODO: Interrupt setup */
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/* set the HC to operational */
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isp1362_write_hc_reg32(ISP1362_HC_CONTROL, 0x0680);
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/* RWE = RWC = 1, HCFS = 0b10 (USBOperational) */
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/* ..then send it to sleep */
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isp1362_write_hc_reg32(ISP1362_HC_CONTROL, 0x06c0);
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/* RWE = RWC = 1, HCFS = 0b11 (USBSuspend) */
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}
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/* init */
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void isp1362_init(void)
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{
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and_l(~0x00200080, &GPIO1_OUT); /* disable 5V USB host power and ??? */
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or_l( 0x00200080, &GPIO1_ENABLE);
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or_l( 0x00200080, &GPIO1_FUNCTION);
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or_l( 0x20600000, &GPIO_OUT); /* ID = D_SUSPEND = /OTGMODE = 1 */
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and_l(~0x04000000, &GPIO_OUT); /* ?R26? = 0 */
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or_l( 0x24600000, &GPIO_ENABLE); /* ID, ?R26?, D_SUSPEND, /OTGMODE outputs */
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and_l(~0x000000a8, &GPIO_ENABLE); /* /INT2, /INT1, /RESET inputs */
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or_l( 0x246000a8, &GPIO_FUNCTION); /* GPIO for these pins */
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sleep(HZ/5);
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isp1362_suspend();
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}
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