forked from Minki/linux
643c3307bb
Current shdmac can support FSI DMAC on r8a7740. This support reduce CPU duty when sound was playback. This patch is based on v1.0 manual Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> Acked-by: Magnus Damm <damm@opensource.se> Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
622 lines
14 KiB
C
622 lines
14 KiB
C
/*
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* R8A7740 processor support
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*
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* Copyright (C) 2011 Renesas Solutions Corp.
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* Copyright (C) 2011 Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <linux/delay.h>
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#include <linux/dma-mapping.h>
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/io.h>
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#include <linux/platform_device.h>
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#include <linux/serial_sci.h>
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#include <linux/sh_dma.h>
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#include <linux/sh_timer.h>
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#include <linux/dma-mapping.h>
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#include <mach/r8a7740.h>
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#include <mach/common.h>
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#include <mach/irqs.h>
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#include <asm/mach-types.h>
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#include <asm/mach/map.h>
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#include <asm/mach/arch.h>
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#include <asm/mach/time.h>
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static struct map_desc r8a7740_io_desc[] __initdata = {
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/*
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* for CPGA/INTC/PFC
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* 0xe6000000-0xefffffff -> 0xe6000000-0xefffffff
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*/
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{
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.virtual = 0xe6000000,
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.pfn = __phys_to_pfn(0xe6000000),
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.length = 160 << 20,
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.type = MT_DEVICE_NONSHARED
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},
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#ifdef CONFIG_CACHE_L2X0
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/*
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* for l2x0_init()
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* 0xf0100000-0xf0101000 -> 0xf0002000-0xf0003000
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*/
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{
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.virtual = 0xf0002000,
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.pfn = __phys_to_pfn(0xf0100000),
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.length = PAGE_SIZE,
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.type = MT_DEVICE_NONSHARED
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},
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#endif
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};
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void __init r8a7740_map_io(void)
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{
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iotable_init(r8a7740_io_desc, ARRAY_SIZE(r8a7740_io_desc));
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/*
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* DMA memory at 0xff200000 - 0xffdfffff. The default 2MB size isn't
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* enough to allocate the frame buffer memory.
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*/
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init_consistent_dma_size(12 << 20);
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}
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/* SCIFA0 */
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static struct plat_sci_port scif0_platform_data = {
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.mapbase = 0xe6c40000,
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.flags = UPF_BOOT_AUTOCONF,
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.scscr = SCSCR_RE | SCSCR_TE,
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.scbrr_algo_id = SCBRR_ALGO_4,
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.type = PORT_SCIFA,
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.irqs = SCIx_IRQ_MUXED(evt2irq(0x0c00)),
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};
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static struct platform_device scif0_device = {
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.name = "sh-sci",
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.id = 0,
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.dev = {
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.platform_data = &scif0_platform_data,
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},
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};
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/* SCIFA1 */
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static struct plat_sci_port scif1_platform_data = {
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.mapbase = 0xe6c50000,
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.flags = UPF_BOOT_AUTOCONF,
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.scscr = SCSCR_RE | SCSCR_TE,
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.scbrr_algo_id = SCBRR_ALGO_4,
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.type = PORT_SCIFA,
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.irqs = SCIx_IRQ_MUXED(evt2irq(0x0c20)),
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};
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static struct platform_device scif1_device = {
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.name = "sh-sci",
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.id = 1,
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.dev = {
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.platform_data = &scif1_platform_data,
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},
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};
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/* SCIFA2 */
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static struct plat_sci_port scif2_platform_data = {
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.mapbase = 0xe6c60000,
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.flags = UPF_BOOT_AUTOCONF,
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.scscr = SCSCR_RE | SCSCR_TE,
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.scbrr_algo_id = SCBRR_ALGO_4,
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.type = PORT_SCIFA,
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.irqs = SCIx_IRQ_MUXED(evt2irq(0x0c40)),
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};
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static struct platform_device scif2_device = {
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.name = "sh-sci",
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.id = 2,
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.dev = {
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.platform_data = &scif2_platform_data,
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},
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};
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/* SCIFA3 */
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static struct plat_sci_port scif3_platform_data = {
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.mapbase = 0xe6c70000,
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.flags = UPF_BOOT_AUTOCONF,
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.scscr = SCSCR_RE | SCSCR_TE,
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.scbrr_algo_id = SCBRR_ALGO_4,
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.type = PORT_SCIFA,
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.irqs = SCIx_IRQ_MUXED(evt2irq(0x0c60)),
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};
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static struct platform_device scif3_device = {
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.name = "sh-sci",
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.id = 3,
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.dev = {
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.platform_data = &scif3_platform_data,
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},
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};
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/* SCIFA4 */
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static struct plat_sci_port scif4_platform_data = {
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.mapbase = 0xe6c80000,
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.flags = UPF_BOOT_AUTOCONF,
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.scscr = SCSCR_RE | SCSCR_TE,
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.scbrr_algo_id = SCBRR_ALGO_4,
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.type = PORT_SCIFA,
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.irqs = SCIx_IRQ_MUXED(evt2irq(0x0d20)),
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};
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static struct platform_device scif4_device = {
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.name = "sh-sci",
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.id = 4,
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.dev = {
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.platform_data = &scif4_platform_data,
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},
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};
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/* SCIFA5 */
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static struct plat_sci_port scif5_platform_data = {
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.mapbase = 0xe6cb0000,
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.flags = UPF_BOOT_AUTOCONF,
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.scscr = SCSCR_RE | SCSCR_TE,
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.scbrr_algo_id = SCBRR_ALGO_4,
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.type = PORT_SCIFA,
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.irqs = SCIx_IRQ_MUXED(evt2irq(0x0d40)),
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};
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static struct platform_device scif5_device = {
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.name = "sh-sci",
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.id = 5,
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.dev = {
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.platform_data = &scif5_platform_data,
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},
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};
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/* SCIFA6 */
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static struct plat_sci_port scif6_platform_data = {
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.mapbase = 0xe6cc0000,
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.flags = UPF_BOOT_AUTOCONF,
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.scscr = SCSCR_RE | SCSCR_TE,
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.scbrr_algo_id = SCBRR_ALGO_4,
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.type = PORT_SCIFA,
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.irqs = SCIx_IRQ_MUXED(evt2irq(0x04c0)),
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};
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static struct platform_device scif6_device = {
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.name = "sh-sci",
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.id = 6,
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.dev = {
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.platform_data = &scif6_platform_data,
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},
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};
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/* SCIFA7 */
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static struct plat_sci_port scif7_platform_data = {
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.mapbase = 0xe6cd0000,
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.flags = UPF_BOOT_AUTOCONF,
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.scscr = SCSCR_RE | SCSCR_TE,
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.scbrr_algo_id = SCBRR_ALGO_4,
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.type = PORT_SCIFA,
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.irqs = SCIx_IRQ_MUXED(evt2irq(0x04e0)),
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};
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static struct platform_device scif7_device = {
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.name = "sh-sci",
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.id = 7,
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.dev = {
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.platform_data = &scif7_platform_data,
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},
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};
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/* SCIFB */
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static struct plat_sci_port scifb_platform_data = {
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.mapbase = 0xe6c30000,
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.flags = UPF_BOOT_AUTOCONF,
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.scscr = SCSCR_RE | SCSCR_TE,
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.scbrr_algo_id = SCBRR_ALGO_4,
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.type = PORT_SCIFB,
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.irqs = SCIx_IRQ_MUXED(evt2irq(0x0d60)),
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};
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static struct platform_device scifb_device = {
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.name = "sh-sci",
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.id = 8,
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.dev = {
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.platform_data = &scifb_platform_data,
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},
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};
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/* CMT */
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static struct sh_timer_config cmt10_platform_data = {
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.name = "CMT10",
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.channel_offset = 0x10,
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.timer_bit = 0,
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.clockevent_rating = 125,
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.clocksource_rating = 125,
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};
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static struct resource cmt10_resources[] = {
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[0] = {
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.name = "CMT10",
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.start = 0xe6138010,
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.end = 0xe613801b,
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.flags = IORESOURCE_MEM,
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},
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[1] = {
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.start = evt2irq(0x0b00),
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.flags = IORESOURCE_IRQ,
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},
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};
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static struct platform_device cmt10_device = {
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.name = "sh_cmt",
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.id = 10,
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.dev = {
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.platform_data = &cmt10_platform_data,
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},
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.resource = cmt10_resources,
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.num_resources = ARRAY_SIZE(cmt10_resources),
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};
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static struct platform_device *r8a7740_early_devices[] __initdata = {
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&scif0_device,
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&scif1_device,
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&scif2_device,
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&scif3_device,
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&scif4_device,
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&scif5_device,
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&scif6_device,
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&scif7_device,
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&scifb_device,
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&cmt10_device,
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};
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/* DMA */
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enum {
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XMIT_SZ_8BIT = 0,
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XMIT_SZ_16BIT = 1,
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XMIT_SZ_32BIT = 2,
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XMIT_SZ_64BIT = 7,
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XMIT_SZ_128BIT = 3,
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XMIT_SZ_256BIT = 4,
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XMIT_SZ_512BIT = 5,
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};
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/* log2(size / 8) - used to calculate number of transfers */
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#define TS_SHIFT { \
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[XMIT_SZ_8BIT] = 0, \
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[XMIT_SZ_16BIT] = 1, \
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[XMIT_SZ_32BIT] = 2, \
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[XMIT_SZ_64BIT] = 3, \
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[XMIT_SZ_128BIT] = 4, \
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[XMIT_SZ_256BIT] = 5, \
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[XMIT_SZ_512BIT] = 6, \
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}
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#define TS_INDEX2VAL(i) ((((i) & 0x3) << 3) | (((i) & 0xc) << (20 - 2)))
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#define CHCR_TX(xmit_sz) (DM_FIX | SM_INC | 0x800 | TS_INDEX2VAL((xmit_sz)))
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#define CHCR_RX(xmit_sz) (DM_INC | SM_FIX | 0x800 | TS_INDEX2VAL((xmit_sz)))
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static const struct sh_dmae_slave_config r8a7740_dmae_slaves[] = {
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{
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.slave_id = SHDMA_SLAVE_FSIA_TX,
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.addr = 0xfe1f0024,
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.chcr = CHCR_TX(XMIT_SZ_32BIT),
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.mid_rid = 0xb1,
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}, {
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.slave_id = SHDMA_SLAVE_FSIA_RX,
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.addr = 0xfe1f0020,
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.chcr = CHCR_RX(XMIT_SZ_32BIT),
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.mid_rid = 0xb2,
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}, {
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.slave_id = SHDMA_SLAVE_FSIB_TX,
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.addr = 0xfe1f0064,
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.chcr = CHCR_TX(XMIT_SZ_32BIT),
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.mid_rid = 0xb5,
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},
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};
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#define DMA_CHANNEL(a, b, c) \
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{ \
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.offset = a, \
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.dmars = b, \
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.dmars_bit = c, \
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.chclr_offset = (0x220 - 0x20) + a \
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}
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static const struct sh_dmae_channel r8a7740_dmae_channels[] = {
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DMA_CHANNEL(0x00, 0, 0),
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DMA_CHANNEL(0x10, 0, 8),
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DMA_CHANNEL(0x20, 4, 0),
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DMA_CHANNEL(0x30, 4, 8),
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DMA_CHANNEL(0x50, 8, 0),
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DMA_CHANNEL(0x60, 8, 8),
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};
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static const unsigned int ts_shift[] = TS_SHIFT;
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static struct sh_dmae_pdata dma_platform_data = {
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.slave = r8a7740_dmae_slaves,
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.slave_num = ARRAY_SIZE(r8a7740_dmae_slaves),
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.channel = r8a7740_dmae_channels,
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.channel_num = ARRAY_SIZE(r8a7740_dmae_channels),
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.ts_low_shift = 3,
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.ts_low_mask = 0x18,
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.ts_high_shift = (20 - 2),
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.ts_high_mask = 0x00300000,
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.ts_shift = ts_shift,
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.ts_shift_num = ARRAY_SIZE(ts_shift),
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.dmaor_init = DMAOR_DME,
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.chclr_present = 1,
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};
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/* Resource order important! */
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static struct resource r8a7740_dmae0_resources[] = {
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{
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/* Channel registers and DMAOR */
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.start = 0xfe008020,
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.end = 0xfe00828f,
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.flags = IORESOURCE_MEM,
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},
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{
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/* DMARSx */
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.start = 0xfe009000,
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.end = 0xfe00900b,
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.flags = IORESOURCE_MEM,
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},
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{
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.name = "error_irq",
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.start = evt2irq(0x20c0),
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.end = evt2irq(0x20c0),
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.flags = IORESOURCE_IRQ,
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},
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{
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/* IRQ for channels 0-5 */
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.start = evt2irq(0x2000),
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.end = evt2irq(0x20a0),
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.flags = IORESOURCE_IRQ,
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},
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};
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/* Resource order important! */
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static struct resource r8a7740_dmae1_resources[] = {
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{
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/* Channel registers and DMAOR */
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.start = 0xfe018020,
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.end = 0xfe01828f,
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.flags = IORESOURCE_MEM,
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},
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{
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/* DMARSx */
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.start = 0xfe019000,
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.end = 0xfe01900b,
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.flags = IORESOURCE_MEM,
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},
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{
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.name = "error_irq",
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.start = evt2irq(0x21c0),
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.end = evt2irq(0x21c0),
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.flags = IORESOURCE_IRQ,
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},
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{
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/* IRQ for channels 0-5 */
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.start = evt2irq(0x2100),
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.end = evt2irq(0x21a0),
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.flags = IORESOURCE_IRQ,
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},
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};
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/* Resource order important! */
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static struct resource r8a7740_dmae2_resources[] = {
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{
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/* Channel registers and DMAOR */
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.start = 0xfe028020,
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.end = 0xfe02828f,
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.flags = IORESOURCE_MEM,
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},
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{
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/* DMARSx */
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.start = 0xfe029000,
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.end = 0xfe02900b,
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.flags = IORESOURCE_MEM,
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},
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{
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.name = "error_irq",
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.start = evt2irq(0x22c0),
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.end = evt2irq(0x22c0),
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.flags = IORESOURCE_IRQ,
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},
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{
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/* IRQ for channels 0-5 */
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.start = evt2irq(0x2200),
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.end = evt2irq(0x22a0),
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.flags = IORESOURCE_IRQ,
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},
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};
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static struct platform_device dma0_device = {
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.name = "sh-dma-engine",
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.id = 0,
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.resource = r8a7740_dmae0_resources,
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.num_resources = ARRAY_SIZE(r8a7740_dmae0_resources),
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.dev = {
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.platform_data = &dma_platform_data,
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},
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};
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static struct platform_device dma1_device = {
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.name = "sh-dma-engine",
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.id = 1,
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.resource = r8a7740_dmae1_resources,
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.num_resources = ARRAY_SIZE(r8a7740_dmae1_resources),
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.dev = {
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.platform_data = &dma_platform_data,
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},
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};
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static struct platform_device dma2_device = {
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.name = "sh-dma-engine",
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.id = 2,
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.resource = r8a7740_dmae2_resources,
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.num_resources = ARRAY_SIZE(r8a7740_dmae2_resources),
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.dev = {
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.platform_data = &dma_platform_data,
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},
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};
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/* I2C */
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static struct resource i2c0_resources[] = {
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[0] = {
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.name = "IIC0",
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.start = 0xfff20000,
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.end = 0xfff20425 - 1,
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.flags = IORESOURCE_MEM,
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},
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[1] = {
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.start = intcs_evt2irq(0xe00),
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.end = intcs_evt2irq(0xe60),
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.flags = IORESOURCE_IRQ,
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},
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};
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static struct resource i2c1_resources[] = {
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[0] = {
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.name = "IIC1",
|
|
.start = 0xe6c20000,
|
|
.end = 0xe6c20425 - 1,
|
|
.flags = IORESOURCE_MEM,
|
|
},
|
|
[1] = {
|
|
.start = evt2irq(0x780), /* IIC1_ALI1 */
|
|
.end = evt2irq(0x7e0), /* IIC1_DTEI1 */
|
|
.flags = IORESOURCE_IRQ,
|
|
},
|
|
};
|
|
|
|
static struct platform_device i2c0_device = {
|
|
.name = "i2c-sh_mobile",
|
|
.id = 0,
|
|
.resource = i2c0_resources,
|
|
.num_resources = ARRAY_SIZE(i2c0_resources),
|
|
};
|
|
|
|
static struct platform_device i2c1_device = {
|
|
.name = "i2c-sh_mobile",
|
|
.id = 1,
|
|
.resource = i2c1_resources,
|
|
.num_resources = ARRAY_SIZE(i2c1_resources),
|
|
};
|
|
|
|
static struct platform_device *r8a7740_late_devices[] __initdata = {
|
|
&i2c0_device,
|
|
&i2c1_device,
|
|
&dma0_device,
|
|
&dma1_device,
|
|
&dma2_device,
|
|
};
|
|
|
|
/*
|
|
* r8a7740 chip has lasting errata on MERAM buffer.
|
|
* this is work-around for it.
|
|
* see
|
|
* "Media RAM (MERAM)" on r8a7740 documentation
|
|
*/
|
|
#define MEBUFCNTR 0xFE950098
|
|
void r8a7740_meram_workaround(void)
|
|
{
|
|
void __iomem *reg;
|
|
|
|
reg = ioremap_nocache(MEBUFCNTR, 4);
|
|
if (reg) {
|
|
iowrite32(0x01600164, reg);
|
|
iounmap(reg);
|
|
}
|
|
}
|
|
|
|
#define ICCR 0x0004
|
|
#define ICSTART 0x0070
|
|
|
|
#define i2c_read(reg, offset) ioread8(reg + offset)
|
|
#define i2c_write(reg, offset, data) iowrite8(data, reg + offset)
|
|
|
|
/*
|
|
* r8a7740 chip has lasting errata on I2C I/O pad reset.
|
|
* this is work-around for it.
|
|
*/
|
|
static void r8a7740_i2c_workaround(struct platform_device *pdev)
|
|
{
|
|
struct resource *res;
|
|
void __iomem *reg;
|
|
|
|
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
|
if (unlikely(!res)) {
|
|
pr_err("r8a7740 i2c workaround fail (cannot find resource)\n");
|
|
return;
|
|
}
|
|
|
|
reg = ioremap(res->start, resource_size(res));
|
|
if (unlikely(!reg)) {
|
|
pr_err("r8a7740 i2c workaround fail (cannot map IO)\n");
|
|
return;
|
|
}
|
|
|
|
i2c_write(reg, ICCR, i2c_read(reg, ICCR) | 0x80);
|
|
i2c_read(reg, ICCR); /* dummy read */
|
|
|
|
i2c_write(reg, ICSTART, i2c_read(reg, ICSTART) | 0x10);
|
|
i2c_read(reg, ICSTART); /* dummy read */
|
|
|
|
udelay(10);
|
|
|
|
i2c_write(reg, ICCR, 0x01);
|
|
i2c_write(reg, ICSTART, 0x00);
|
|
|
|
udelay(10);
|
|
|
|
i2c_write(reg, ICCR, 0x10);
|
|
udelay(10);
|
|
i2c_write(reg, ICCR, 0x00);
|
|
udelay(10);
|
|
i2c_write(reg, ICCR, 0x10);
|
|
udelay(10);
|
|
|
|
iounmap(reg);
|
|
}
|
|
|
|
void __init r8a7740_add_standard_devices(void)
|
|
{
|
|
/* I2C work-around */
|
|
r8a7740_i2c_workaround(&i2c0_device);
|
|
r8a7740_i2c_workaround(&i2c1_device);
|
|
|
|
platform_add_devices(r8a7740_early_devices,
|
|
ARRAY_SIZE(r8a7740_early_devices));
|
|
platform_add_devices(r8a7740_late_devices,
|
|
ARRAY_SIZE(r8a7740_late_devices));
|
|
}
|
|
|
|
static void __init r8a7740_earlytimer_init(void)
|
|
{
|
|
r8a7740_clock_init(0);
|
|
shmobile_earlytimer_init();
|
|
}
|
|
|
|
void __init r8a7740_add_early_devices(void)
|
|
{
|
|
early_platform_add_devices(r8a7740_early_devices,
|
|
ARRAY_SIZE(r8a7740_early_devices));
|
|
|
|
/* setup early console here as well */
|
|
shmobile_setup_console();
|
|
|
|
/* override timer setup with soc-specific code */
|
|
shmobile_timer.init = r8a7740_earlytimer_init;
|
|
}
|