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c78a41fc04
As a final bit of preparation for converting to ARCH_MULTIPLATFORM, change the interrupt handling for s3c24xx to use sparse IRQs. Since the number of possible interrupts is already fixed and relatively small per chip, just make it use all legacy interrupts preallocated using the .nr_irqs field in the machine descriptor, rather than actually allocating domains on the fly. Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
265 lines
6.2 KiB
C
265 lines
6.2 KiB
C
// SPDX-License-Identifier: GPL-2.0
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//
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// Samsung's S3C64XX generic DMA support using amba-pl08x driver.
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//
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// Copyright (c) 2013 Tomasz Figa <tomasz.figa@gmail.com>
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#include <linux/kernel.h>
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#include <linux/amba/bus.h>
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#include <linux/amba/pl080.h>
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#include <linux/amba/pl08x.h>
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#include <linux/of.h>
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#include "cpu.h"
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#include "irqs.h"
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#include "map.h"
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#include "regs-sys-s3c64xx.h"
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static int pl08x_get_xfer_signal(const struct pl08x_channel_data *cd)
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{
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return cd->min_signal;
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}
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static void pl08x_put_xfer_signal(const struct pl08x_channel_data *cd, int ch)
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{
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}
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/*
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* DMA0
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*/
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static struct pl08x_channel_data s3c64xx_dma0_info[] = {
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{
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.bus_id = "uart0_tx",
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.min_signal = 0,
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.max_signal = 0,
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.periph_buses = PL08X_AHB2,
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}, {
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.bus_id = "uart0_rx",
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.min_signal = 1,
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.max_signal = 1,
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.periph_buses = PL08X_AHB2,
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}, {
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.bus_id = "uart1_tx",
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.min_signal = 2,
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.max_signal = 2,
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.periph_buses = PL08X_AHB2,
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}, {
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.bus_id = "uart1_rx",
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.min_signal = 3,
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.max_signal = 3,
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.periph_buses = PL08X_AHB2,
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}, {
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.bus_id = "uart2_tx",
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.min_signal = 4,
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.max_signal = 4,
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.periph_buses = PL08X_AHB2,
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}, {
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.bus_id = "uart2_rx",
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.min_signal = 5,
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.max_signal = 5,
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.periph_buses = PL08X_AHB2,
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}, {
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.bus_id = "uart3_tx",
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.min_signal = 6,
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.max_signal = 6,
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.periph_buses = PL08X_AHB2,
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}, {
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.bus_id = "uart3_rx",
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.min_signal = 7,
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.max_signal = 7,
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.periph_buses = PL08X_AHB2,
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}, {
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.bus_id = "pcm0_tx",
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.min_signal = 8,
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.max_signal = 8,
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.periph_buses = PL08X_AHB2,
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}, {
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.bus_id = "pcm0_rx",
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.min_signal = 9,
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.max_signal = 9,
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.periph_buses = PL08X_AHB2,
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}, {
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.bus_id = "i2s0_tx",
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.min_signal = 10,
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.max_signal = 10,
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.periph_buses = PL08X_AHB2,
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}, {
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.bus_id = "i2s0_rx",
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.min_signal = 11,
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.max_signal = 11,
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.periph_buses = PL08X_AHB2,
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}, {
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.bus_id = "spi0_tx",
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.min_signal = 12,
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.max_signal = 12,
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.periph_buses = PL08X_AHB2,
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}, {
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.bus_id = "spi0_rx",
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.min_signal = 13,
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.max_signal = 13,
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.periph_buses = PL08X_AHB2,
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}, {
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.bus_id = "i2s2_tx",
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.min_signal = 14,
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.max_signal = 14,
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.periph_buses = PL08X_AHB2,
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}, {
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.bus_id = "i2s2_rx",
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.min_signal = 15,
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.max_signal = 15,
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.periph_buses = PL08X_AHB2,
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}
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};
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static const struct dma_slave_map s3c64xx_dma0_slave_map[] = {
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{ "s3c6400-uart.0", "tx", &s3c64xx_dma0_info[0] },
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{ "s3c6400-uart.0", "rx", &s3c64xx_dma0_info[1] },
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{ "s3c6400-uart.1", "tx", &s3c64xx_dma0_info[2] },
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{ "s3c6400-uart.1", "rx", &s3c64xx_dma0_info[3] },
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{ "s3c6400-uart.2", "tx", &s3c64xx_dma0_info[4] },
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{ "s3c6400-uart.2", "rx", &s3c64xx_dma0_info[5] },
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{ "s3c6400-uart.3", "tx", &s3c64xx_dma0_info[6] },
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{ "s3c6400-uart.3", "rx", &s3c64xx_dma0_info[7] },
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{ "samsung-pcm.0", "tx", &s3c64xx_dma0_info[8] },
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{ "samsung-pcm.0", "rx", &s3c64xx_dma0_info[9] },
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{ "samsung-i2s.0", "tx", &s3c64xx_dma0_info[10] },
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{ "samsung-i2s.0", "rx", &s3c64xx_dma0_info[11] },
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{ "s3c6410-spi.0", "tx", &s3c64xx_dma0_info[12] },
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{ "s3c6410-spi.0", "rx", &s3c64xx_dma0_info[13] },
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{ "samsung-i2s.2", "tx", &s3c64xx_dma0_info[14] },
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{ "samsung-i2s.2", "rx", &s3c64xx_dma0_info[15] },
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};
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struct pl08x_platform_data s3c64xx_dma0_plat_data = {
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.memcpy_burst_size = PL08X_BURST_SZ_4,
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.memcpy_bus_width = PL08X_BUS_WIDTH_32_BITS,
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.memcpy_prot_buff = true,
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.memcpy_prot_cache = true,
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.lli_buses = PL08X_AHB1,
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.mem_buses = PL08X_AHB1,
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.get_xfer_signal = pl08x_get_xfer_signal,
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.put_xfer_signal = pl08x_put_xfer_signal,
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.slave_channels = s3c64xx_dma0_info,
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.num_slave_channels = ARRAY_SIZE(s3c64xx_dma0_info),
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.slave_map = s3c64xx_dma0_slave_map,
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.slave_map_len = ARRAY_SIZE(s3c64xx_dma0_slave_map),
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};
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static AMBA_AHB_DEVICE(s3c64xx_dma0, "dma-pl080s.0", 0,
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0x75000000, {IRQ_DMA0}, &s3c64xx_dma0_plat_data);
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/*
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* DMA1
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*/
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static struct pl08x_channel_data s3c64xx_dma1_info[] = {
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{
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.bus_id = "pcm1_tx",
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.min_signal = 0,
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.max_signal = 0,
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.periph_buses = PL08X_AHB2,
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}, {
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.bus_id = "pcm1_rx",
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.min_signal = 1,
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.max_signal = 1,
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.periph_buses = PL08X_AHB2,
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}, {
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.bus_id = "i2s1_tx",
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.min_signal = 2,
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.max_signal = 2,
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.periph_buses = PL08X_AHB2,
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}, {
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.bus_id = "i2s1_rx",
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.min_signal = 3,
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.max_signal = 3,
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.periph_buses = PL08X_AHB2,
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}, {
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.bus_id = "spi1_tx",
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.min_signal = 4,
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.max_signal = 4,
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.periph_buses = PL08X_AHB2,
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}, {
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.bus_id = "spi1_rx",
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.min_signal = 5,
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.max_signal = 5,
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.periph_buses = PL08X_AHB2,
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}, {
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.bus_id = "ac97_out",
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.min_signal = 6,
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.max_signal = 6,
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.periph_buses = PL08X_AHB2,
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}, {
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.bus_id = "ac97_in",
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.min_signal = 7,
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.max_signal = 7,
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.periph_buses = PL08X_AHB2,
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}, {
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.bus_id = "ac97_mic",
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.min_signal = 8,
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.max_signal = 8,
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.periph_buses = PL08X_AHB2,
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}, {
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.bus_id = "pwm",
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.min_signal = 9,
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.max_signal = 9,
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.periph_buses = PL08X_AHB2,
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}, {
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.bus_id = "irda",
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.min_signal = 10,
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.max_signal = 10,
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.periph_buses = PL08X_AHB2,
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}, {
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.bus_id = "external",
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.min_signal = 11,
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.max_signal = 11,
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.periph_buses = PL08X_AHB2,
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},
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};
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static const struct dma_slave_map s3c64xx_dma1_slave_map[] = {
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{ "samsung-pcm.1", "tx", &s3c64xx_dma1_info[0] },
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{ "samsung-pcm.1", "rx", &s3c64xx_dma1_info[1] },
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{ "samsung-i2s.1", "tx", &s3c64xx_dma1_info[2] },
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{ "samsung-i2s.1", "rx", &s3c64xx_dma1_info[3] },
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{ "s3c6410-spi.1", "tx", &s3c64xx_dma1_info[4] },
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{ "s3c6410-spi.1", "rx", &s3c64xx_dma1_info[5] },
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};
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struct pl08x_platform_data s3c64xx_dma1_plat_data = {
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.memcpy_burst_size = PL08X_BURST_SZ_4,
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.memcpy_bus_width = PL08X_BUS_WIDTH_32_BITS,
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.memcpy_prot_buff = true,
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.memcpy_prot_cache = true,
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.lli_buses = PL08X_AHB1,
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.mem_buses = PL08X_AHB1,
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.get_xfer_signal = pl08x_get_xfer_signal,
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.put_xfer_signal = pl08x_put_xfer_signal,
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.slave_channels = s3c64xx_dma1_info,
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.num_slave_channels = ARRAY_SIZE(s3c64xx_dma1_info),
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.slave_map = s3c64xx_dma1_slave_map,
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.slave_map_len = ARRAY_SIZE(s3c64xx_dma1_slave_map),
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};
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static AMBA_AHB_DEVICE(s3c64xx_dma1, "dma-pl080s.1", 0,
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0x75100000, {IRQ_DMA1}, &s3c64xx_dma1_plat_data);
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static int __init s3c64xx_pl080_init(void)
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{
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if (!soc_is_s3c64xx())
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return 0;
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/* Set all DMA configuration to be DMA, not SDMA */
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writel(0xffffff, S3C64XX_SDMA_SEL);
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if (of_have_populated_dt())
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return 0;
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amba_device_register(&s3c64xx_dma0_device, &iomem_resource);
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amba_device_register(&s3c64xx_dma1_device, &iomem_resource);
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return 0;
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}
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arch_initcall(s3c64xx_pl080_init);
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