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linux-next/arch/arm/mach-spear3xx/spear320.c
Russell King dc8d5f8de1 dmaengine: PL08x: get rid of unnecessary checks in dma_slave_config 
Get rid of the unnecessary checks in dma_slave_config utilizing
the DMA direction.  This allows us to move the computation of
cctl to the prepare function.

Acked-by: Linus Walleij <linus.walleij@linaro.org>
Tested-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2012-07-01 14:15:48 +01:00

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/*
* arch/arm/mach-spear3xx/spear320.c
*
* SPEAr320 machine source file
*
* Copyright (C) 2009-2012 ST Microelectronics
* Viresh Kumar <viresh.linux@gmail.com>
*
* This file is licensed under the terms of the GNU General Public
* License version 2. This program is licensed "as is" without any
* warranty of any kind, whether express or implied.
*/
#define pr_fmt(fmt) "SPEAr320: " fmt
#include <linux/amba/pl022.h>
#include <linux/amba/pl08x.h>
#include <linux/amba/serial.h>
#include <linux/of_platform.h>
#include <asm/hardware/vic.h>
#include <asm/mach/arch.h>
#include <plat/shirq.h>
#include <mach/generic.h>
#include <mach/spear.h>
#define SPEAR320_UART1_BASE UL(0xA3000000)
#define SPEAR320_UART2_BASE UL(0xA4000000)
#define SPEAR320_SSP0_BASE UL(0xA5000000)
#define SPEAR320_SSP1_BASE UL(0xA6000000)
/* Interrupt registers offsets and masks */
#define SPEAR320_INT_STS_MASK_REG 0x04
#define SPEAR320_INT_CLR_MASK_REG 0x04
#define SPEAR320_INT_ENB_MASK_REG 0x08
#define SPEAR320_GPIO_IRQ_MASK (1 << 0)
#define SPEAR320_I2S_PLAY_IRQ_MASK (1 << 1)
#define SPEAR320_I2S_REC_IRQ_MASK (1 << 2)
#define SPEAR320_EMI_IRQ_MASK (1 << 7)
#define SPEAR320_CLCD_IRQ_MASK (1 << 8)
#define SPEAR320_SPP_IRQ_MASK (1 << 9)
#define SPEAR320_SDHCI_IRQ_MASK (1 << 10)
#define SPEAR320_CAN_U_IRQ_MASK (1 << 11)
#define SPEAR320_CAN_L_IRQ_MASK (1 << 12)
#define SPEAR320_UART1_IRQ_MASK (1 << 13)
#define SPEAR320_UART2_IRQ_MASK (1 << 14)
#define SPEAR320_SSP1_IRQ_MASK (1 << 15)
#define SPEAR320_SSP2_IRQ_MASK (1 << 16)
#define SPEAR320_SMII0_IRQ_MASK (1 << 17)
#define SPEAR320_MII1_SMII1_IRQ_MASK (1 << 18)
#define SPEAR320_WAKEUP_SMII0_IRQ_MASK (1 << 19)
#define SPEAR320_WAKEUP_MII1_SMII1_IRQ_MASK (1 << 20)
#define SPEAR320_I2C1_IRQ_MASK (1 << 21)
#define SPEAR320_SHIRQ_RAS1_MASK 0x000380
#define SPEAR320_SHIRQ_RAS3_MASK 0x000007
#define SPEAR320_SHIRQ_INTRCOMM_RAS_MASK 0x3FF800
/* SPEAr320 Virtual irq definitions */
/* IRQs sharing IRQ_GEN_RAS_1 */
#define SPEAR320_VIRQ_EMI (SPEAR3XX_VIRQ_START + 0)
#define SPEAR320_VIRQ_CLCD (SPEAR3XX_VIRQ_START + 1)
#define SPEAR320_VIRQ_SPP (SPEAR3XX_VIRQ_START + 2)
/* IRQs sharing IRQ_GEN_RAS_2 */
#define SPEAR320_IRQ_SDHCI SPEAR3XX_IRQ_GEN_RAS_2
/* IRQs sharing IRQ_GEN_RAS_3 */
#define SPEAR320_VIRQ_PLGPIO (SPEAR3XX_VIRQ_START + 3)
#define SPEAR320_VIRQ_I2S_PLAY (SPEAR3XX_VIRQ_START + 4)
#define SPEAR320_VIRQ_I2S_REC (SPEAR3XX_VIRQ_START + 5)
/* IRQs sharing IRQ_INTRCOMM_RAS_ARM */
#define SPEAR320_VIRQ_CANU (SPEAR3XX_VIRQ_START + 6)
#define SPEAR320_VIRQ_CANL (SPEAR3XX_VIRQ_START + 7)
#define SPEAR320_VIRQ_UART1 (SPEAR3XX_VIRQ_START + 8)
#define SPEAR320_VIRQ_UART2 (SPEAR3XX_VIRQ_START + 9)
#define SPEAR320_VIRQ_SSP1 (SPEAR3XX_VIRQ_START + 10)
#define SPEAR320_VIRQ_SSP2 (SPEAR3XX_VIRQ_START + 11)
#define SPEAR320_VIRQ_SMII0 (SPEAR3XX_VIRQ_START + 12)
#define SPEAR320_VIRQ_MII1_SMII1 (SPEAR3XX_VIRQ_START + 13)
#define SPEAR320_VIRQ_WAKEUP_SMII0 (SPEAR3XX_VIRQ_START + 14)
#define SPEAR320_VIRQ_WAKEUP_MII1_SMII1 (SPEAR3XX_VIRQ_START + 15)
#define SPEAR320_VIRQ_I2C1 (SPEAR3XX_VIRQ_START + 16)
/* spear3xx shared irq */
static struct shirq_dev_config shirq_ras1_config[] = {
{
.virq = SPEAR320_VIRQ_EMI,
.status_mask = SPEAR320_EMI_IRQ_MASK,
.clear_mask = SPEAR320_EMI_IRQ_MASK,
}, {
.virq = SPEAR320_VIRQ_CLCD,
.status_mask = SPEAR320_CLCD_IRQ_MASK,
.clear_mask = SPEAR320_CLCD_IRQ_MASK,
}, {
.virq = SPEAR320_VIRQ_SPP,
.status_mask = SPEAR320_SPP_IRQ_MASK,
.clear_mask = SPEAR320_SPP_IRQ_MASK,
},
};
static struct spear_shirq shirq_ras1 = {
.irq = SPEAR3XX_IRQ_GEN_RAS_1,
.dev_config = shirq_ras1_config,
.dev_count = ARRAY_SIZE(shirq_ras1_config),
.regs = {
.enb_reg = -1,
.status_reg = SPEAR320_INT_STS_MASK_REG,
.status_reg_mask = SPEAR320_SHIRQ_RAS1_MASK,
.clear_reg = SPEAR320_INT_CLR_MASK_REG,
.reset_to_clear = 1,
},
};
static struct shirq_dev_config shirq_ras3_config[] = {
{
.virq = SPEAR320_VIRQ_PLGPIO,
.enb_mask = SPEAR320_GPIO_IRQ_MASK,
.status_mask = SPEAR320_GPIO_IRQ_MASK,
.clear_mask = SPEAR320_GPIO_IRQ_MASK,
}, {
.virq = SPEAR320_VIRQ_I2S_PLAY,
.enb_mask = SPEAR320_I2S_PLAY_IRQ_MASK,
.status_mask = SPEAR320_I2S_PLAY_IRQ_MASK,
.clear_mask = SPEAR320_I2S_PLAY_IRQ_MASK,
}, {
.virq = SPEAR320_VIRQ_I2S_REC,
.enb_mask = SPEAR320_I2S_REC_IRQ_MASK,
.status_mask = SPEAR320_I2S_REC_IRQ_MASK,
.clear_mask = SPEAR320_I2S_REC_IRQ_MASK,
},
};
static struct spear_shirq shirq_ras3 = {
.irq = SPEAR3XX_IRQ_GEN_RAS_3,
.dev_config = shirq_ras3_config,
.dev_count = ARRAY_SIZE(shirq_ras3_config),
.regs = {
.enb_reg = SPEAR320_INT_ENB_MASK_REG,
.reset_to_enb = 1,
.status_reg = SPEAR320_INT_STS_MASK_REG,
.status_reg_mask = SPEAR320_SHIRQ_RAS3_MASK,
.clear_reg = SPEAR320_INT_CLR_MASK_REG,
.reset_to_clear = 1,
},
};
static struct shirq_dev_config shirq_intrcomm_ras_config[] = {
{
.virq = SPEAR320_VIRQ_CANU,
.status_mask = SPEAR320_CAN_U_IRQ_MASK,
.clear_mask = SPEAR320_CAN_U_IRQ_MASK,
}, {
.virq = SPEAR320_VIRQ_CANL,
.status_mask = SPEAR320_CAN_L_IRQ_MASK,
.clear_mask = SPEAR320_CAN_L_IRQ_MASK,
}, {
.virq = SPEAR320_VIRQ_UART1,
.status_mask = SPEAR320_UART1_IRQ_MASK,
.clear_mask = SPEAR320_UART1_IRQ_MASK,
}, {
.virq = SPEAR320_VIRQ_UART2,
.status_mask = SPEAR320_UART2_IRQ_MASK,
.clear_mask = SPEAR320_UART2_IRQ_MASK,
}, {
.virq = SPEAR320_VIRQ_SSP1,
.status_mask = SPEAR320_SSP1_IRQ_MASK,
.clear_mask = SPEAR320_SSP1_IRQ_MASK,
}, {
.virq = SPEAR320_VIRQ_SSP2,
.status_mask = SPEAR320_SSP2_IRQ_MASK,
.clear_mask = SPEAR320_SSP2_IRQ_MASK,
}, {
.virq = SPEAR320_VIRQ_SMII0,
.status_mask = SPEAR320_SMII0_IRQ_MASK,
.clear_mask = SPEAR320_SMII0_IRQ_MASK,
}, {
.virq = SPEAR320_VIRQ_MII1_SMII1,
.status_mask = SPEAR320_MII1_SMII1_IRQ_MASK,
.clear_mask = SPEAR320_MII1_SMII1_IRQ_MASK,
}, {
.virq = SPEAR320_VIRQ_WAKEUP_SMII0,
.status_mask = SPEAR320_WAKEUP_SMII0_IRQ_MASK,
.clear_mask = SPEAR320_WAKEUP_SMII0_IRQ_MASK,
}, {
.virq = SPEAR320_VIRQ_WAKEUP_MII1_SMII1,
.status_mask = SPEAR320_WAKEUP_MII1_SMII1_IRQ_MASK,
.clear_mask = SPEAR320_WAKEUP_MII1_SMII1_IRQ_MASK,
}, {
.virq = SPEAR320_VIRQ_I2C1,
.status_mask = SPEAR320_I2C1_IRQ_MASK,
.clear_mask = SPEAR320_I2C1_IRQ_MASK,
},
};
static struct spear_shirq shirq_intrcomm_ras = {
.irq = SPEAR3XX_IRQ_INTRCOMM_RAS_ARM,
.dev_config = shirq_intrcomm_ras_config,
.dev_count = ARRAY_SIZE(shirq_intrcomm_ras_config),
.regs = {
.enb_reg = -1,
.status_reg = SPEAR320_INT_STS_MASK_REG,
.status_reg_mask = SPEAR320_SHIRQ_INTRCOMM_RAS_MASK,
.clear_reg = SPEAR320_INT_CLR_MASK_REG,
.reset_to_clear = 1,
},
};
/* DMAC platform data's slave info */
struct pl08x_channel_data spear320_dma_info[] = {
{
.bus_id = "uart0_rx",
.min_signal = 2,
.max_signal = 2,
.muxval = 0,
.periph_buses = PL08X_AHB1,
}, {
.bus_id = "uart0_tx",
.min_signal = 3,
.max_signal = 3,
.muxval = 0,
.periph_buses = PL08X_AHB1,
}, {
.bus_id = "ssp0_rx",
.min_signal = 8,
.max_signal = 8,
.muxval = 0,
.periph_buses = PL08X_AHB1,
}, {
.bus_id = "ssp0_tx",
.min_signal = 9,
.max_signal = 9,
.muxval = 0,
.periph_buses = PL08X_AHB1,
}, {
.bus_id = "i2c0_rx",
.min_signal = 10,
.max_signal = 10,
.muxval = 0,
.periph_buses = PL08X_AHB1,
}, {
.bus_id = "i2c0_tx",
.min_signal = 11,
.max_signal = 11,
.muxval = 0,
.periph_buses = PL08X_AHB1,
}, {
.bus_id = "irda",
.min_signal = 12,
.max_signal = 12,
.muxval = 0,
.periph_buses = PL08X_AHB1,
}, {
.bus_id = "adc",
.min_signal = 13,
.max_signal = 13,
.muxval = 0,
.periph_buses = PL08X_AHB1,
}, {
.bus_id = "to_jpeg",
.min_signal = 14,
.max_signal = 14,
.muxval = 0,
.periph_buses = PL08X_AHB1,
}, {
.bus_id = "from_jpeg",
.min_signal = 15,
.max_signal = 15,
.muxval = 0,
.periph_buses = PL08X_AHB1,
}, {
.bus_id = "ssp1_rx",
.min_signal = 0,
.max_signal = 0,
.muxval = 1,
.periph_buses = PL08X_AHB2,
}, {
.bus_id = "ssp1_tx",
.min_signal = 1,
.max_signal = 1,
.muxval = 1,
.periph_buses = PL08X_AHB2,
}, {
.bus_id = "ssp2_rx",
.min_signal = 2,
.max_signal = 2,
.muxval = 1,
.periph_buses = PL08X_AHB2,
}, {
.bus_id = "ssp2_tx",
.min_signal = 3,
.max_signal = 3,
.muxval = 1,
.periph_buses = PL08X_AHB2,
}, {
.bus_id = "uart1_rx",
.min_signal = 4,
.max_signal = 4,
.muxval = 1,
.periph_buses = PL08X_AHB2,
}, {
.bus_id = "uart1_tx",
.min_signal = 5,
.max_signal = 5,
.muxval = 1,
.periph_buses = PL08X_AHB2,
}, {
.bus_id = "uart2_rx",
.min_signal = 6,
.max_signal = 6,
.muxval = 1,
.periph_buses = PL08X_AHB2,
}, {
.bus_id = "uart2_tx",
.min_signal = 7,
.max_signal = 7,
.muxval = 1,
.periph_buses = PL08X_AHB2,
}, {
.bus_id = "i2c1_rx",
.min_signal = 8,
.max_signal = 8,
.muxval = 1,
.periph_buses = PL08X_AHB2,
}, {
.bus_id = "i2c1_tx",
.min_signal = 9,
.max_signal = 9,
.muxval = 1,
.periph_buses = PL08X_AHB2,
}, {
.bus_id = "i2c2_rx",
.min_signal = 10,
.max_signal = 10,
.muxval = 1,
.periph_buses = PL08X_AHB2,
}, {
.bus_id = "i2c2_tx",
.min_signal = 11,
.max_signal = 11,
.muxval = 1,
.periph_buses = PL08X_AHB2,
}, {
.bus_id = "i2s_rx",
.min_signal = 12,
.max_signal = 12,
.muxval = 1,
.periph_buses = PL08X_AHB2,
}, {
.bus_id = "i2s_tx",
.min_signal = 13,
.max_signal = 13,
.muxval = 1,
.periph_buses = PL08X_AHB2,
}, {
.bus_id = "rs485_rx",
.min_signal = 14,
.max_signal = 14,
.muxval = 1,
.periph_buses = PL08X_AHB2,
}, {
.bus_id = "rs485_tx",
.min_signal = 15,
.max_signal = 15,
.muxval = 1,
.periph_buses = PL08X_AHB2,
},
};
static struct pl022_ssp_controller spear320_ssp_data[] = {
{
.bus_id = 1,
.enable_dma = 1,
.dma_filter = pl08x_filter_id,
.dma_tx_param = "ssp1_tx",
.dma_rx_param = "ssp1_rx",
.num_chipselect = 2,
}, {
.bus_id = 2,
.enable_dma = 1,
.dma_filter = pl08x_filter_id,
.dma_tx_param = "ssp2_tx",
.dma_rx_param = "ssp2_rx",
.num_chipselect = 2,
}
};
static struct amba_pl011_data spear320_uart_data[] = {
{
.dma_filter = pl08x_filter_id,
.dma_tx_param = "uart1_tx",
.dma_rx_param = "uart1_rx",
}, {
.dma_filter = pl08x_filter_id,
.dma_tx_param = "uart2_tx",
.dma_rx_param = "uart2_rx",
},
};
/* Add SPEAr310 auxdata to pass platform data */
static struct of_dev_auxdata spear320_auxdata_lookup[] __initdata = {
OF_DEV_AUXDATA("arm,pl022", SPEAR3XX_ICM1_SSP_BASE, NULL,
&pl022_plat_data),
OF_DEV_AUXDATA("arm,pl080", SPEAR3XX_ICM3_DMA_BASE, NULL,
&pl080_plat_data),
OF_DEV_AUXDATA("arm,pl022", SPEAR320_SSP0_BASE, NULL,
&spear320_ssp_data[0]),
OF_DEV_AUXDATA("arm,pl022", SPEAR320_SSP1_BASE, NULL,
&spear320_ssp_data[1]),
OF_DEV_AUXDATA("arm,pl011", SPEAR320_UART1_BASE, NULL,
&spear320_uart_data[0]),
OF_DEV_AUXDATA("arm,pl011", SPEAR320_UART2_BASE, NULL,
&spear320_uart_data[1]),
{}
};
static void __init spear320_dt_init(void)
{
void __iomem *base;
int ret;
pl080_plat_data.slave_channels = spear320_dma_info;
pl080_plat_data.num_slave_channels = ARRAY_SIZE(spear320_dma_info);
of_platform_populate(NULL, of_default_bus_match_table,
spear320_auxdata_lookup, NULL);
/* shared irq registration */
base = ioremap(SPEAR320_SOC_CONFIG_BASE, SZ_4K);
if (base) {
/* shirq 1 */
shirq_ras1.regs.base = base;
ret = spear_shirq_register(&shirq_ras1);
if (ret)
pr_err("Error registering Shared IRQ 1\n");
/* shirq 3 */
shirq_ras3.regs.base = base;
ret = spear_shirq_register(&shirq_ras3);
if (ret)
pr_err("Error registering Shared IRQ 3\n");
/* shirq 4 */
shirq_intrcomm_ras.regs.base = base;
ret = spear_shirq_register(&shirq_intrcomm_ras);
if (ret)
pr_err("Error registering Shared IRQ 4\n");
}
}
static const char * const spear320_dt_board_compat[] = {
"st,spear320",
"st,spear320-evb",
NULL,
};
struct map_desc spear320_io_desc[] __initdata = {
{
.virtual = VA_SPEAR320_SOC_CONFIG_BASE,
.pfn = __phys_to_pfn(SPEAR320_SOC_CONFIG_BASE),
.length = SZ_16M,
.type = MT_DEVICE
},
};
static void __init spear320_map_io(void)
{
iotable_init(spear320_io_desc, ARRAY_SIZE(spear320_io_desc));
spear3xx_map_io();
}
DT_MACHINE_START(SPEAR320_DT, "ST SPEAr320 SoC with Flattened Device Tree")
.map_io = spear320_map_io,
.init_irq = spear3xx_dt_init_irq,
.handle_irq = vic_handle_irq,
.timer = &spear3xx_timer,
.init_machine = spear320_dt_init,
.restart = spear_restart,
.dt_compat = spear320_dt_board_compat,
MACHINE_END
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