/
bcm2708.c
1220 lines (1057 loc) · 30.6 KB
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bcm2708.c
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/*
* linux/arch/arm/mach-bcm2708/bcm2708.c
*
* Copyright (C) 2010 Broadcom
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <linux/init.h>
#include <linux/device.h>
#include <linux/dma-mapping.h>
#include <linux/serial_8250.h>
#include <linux/platform_device.h>
#include <linux/syscore_ops.h>
#include <linux/interrupt.h>
#include <linux/amba/bus.h>
#include <linux/amba/clcd.h>
#include <linux/clk-provider.h>
#include <linux/clkdev.h>
#include <linux/clockchips.h>
#include <linux/cnt32_to_63.h>
#include <linux/io.h>
#include <linux/module.h>
#include <linux/of_platform.h>
#include <linux/spi/spi.h>
#include <linux/gpio/machine.h>
#include <linux/w1-gpio.h>
#include <linux/pps-gpio.h>
#include <linux/version.h>
#include <linux/clkdev.h>
#include <asm/system_info.h>
#include <mach/hardware.h>
#include <asm/irq.h>
#include <linux/leds.h>
#include <asm/mach-types.h>
#include <linux/sched_clock.h>
#include <asm/mach/arch.h>
#include <asm/mach/flash.h>
#include <asm/mach/irq.h>
#include <asm/mach/time.h>
#include <asm/mach/map.h>
#include <mach/timex.h>
#include <mach/system.h>
#include <linux/delay.h>
#include "bcm2708.h"
#include "armctrl.h"
#ifdef CONFIG_BCM_VC_CMA
#include <linux/broadcom/vc_cma.h>
#endif
/* Effectively we have an IOMMU (ARM<->VideoCore map) that is set up to
* give us IO access only to 64Mbytes of physical memory (26 bits). We could
* represent this window by setting our dmamasks to 26 bits but, in fact
* we're not going to use addresses outside this range (they're not in real
* memory) so we don't bother.
*
* In the future we might include code to use this IOMMU to remap other
* physical addresses onto VideoCore memory then the use of 32-bits would be
* more legitimate.
*/
#define DMA_MASK_BITS_COMMON 32
// use GPIO 4 for the one-wire GPIO pin, if enabled
#define W1_GPIO 4
// ensure one-wire GPIO pullup is disabled by default
#define W1_PULLUP -1
/* command line parameters */
static unsigned boardrev, serial;
static unsigned uart_clock = UART0_CLOCK;
static unsigned disk_led_gpio = 16;
static unsigned disk_led_active_low = 1;
static unsigned reboot_part = 0;
static unsigned w1_gpio_pin = W1_GPIO;
static unsigned w1_gpio_pullup = W1_PULLUP;
static int pps_gpio_pin = -1;
static bool vc_i2c_override = false;
static unsigned use_dt = 0;
static void __init bcm2708_init_led(void);
void __init bcm2708_init_irq(void)
{
armctrl_init(__io_address(ARMCTRL_IC_BASE), 0, 0, 0);
}
static struct map_desc bcm2708_io_desc[] __initdata = {
{
.virtual = IO_ADDRESS(ARMCTRL_BASE),
.pfn = __phys_to_pfn(ARMCTRL_BASE),
.length = SZ_4K,
.type = MT_DEVICE},
{
.virtual = IO_ADDRESS(UART0_BASE),
.pfn = __phys_to_pfn(UART0_BASE),
.length = SZ_4K,
.type = MT_DEVICE},
{
.virtual = IO_ADDRESS(UART1_BASE),
.pfn = __phys_to_pfn(UART1_BASE),
.length = SZ_4K,
.type = MT_DEVICE},
{
.virtual = IO_ADDRESS(DMA_BASE),
.pfn = __phys_to_pfn(DMA_BASE),
.length = SZ_4K,
.type = MT_DEVICE},
{
.virtual = IO_ADDRESS(MCORE_BASE),
.pfn = __phys_to_pfn(MCORE_BASE),
.length = SZ_4K,
.type = MT_DEVICE},
{
.virtual = IO_ADDRESS(ST_BASE),
.pfn = __phys_to_pfn(ST_BASE),
.length = SZ_4K,
.type = MT_DEVICE},
{
.virtual = IO_ADDRESS(USB_BASE),
.pfn = __phys_to_pfn(USB_BASE),
.length = SZ_128K,
.type = MT_DEVICE},
{
.virtual = IO_ADDRESS(PM_BASE),
.pfn = __phys_to_pfn(PM_BASE),
.length = SZ_4K,
.type = MT_DEVICE},
{
.virtual = IO_ADDRESS(GPIO_BASE),
.pfn = __phys_to_pfn(GPIO_BASE),
.length = SZ_4K,
.type = MT_DEVICE}
};
void __init bcm2708_map_io(void)
{
iotable_init(bcm2708_io_desc, ARRAY_SIZE(bcm2708_io_desc));
}
/* The STC is a free running counter that increments at the rate of 1MHz */
#define STC_FREQ_HZ 1000000
static inline uint32_t timer_read(void)
{
/* STC: a free running counter that increments at the rate of 1MHz */
return readl(__io_address(ST_BASE + 0x04));
}
static unsigned long bcm2708_read_current_timer(void)
{
return timer_read();
}
static u64 notrace bcm2708_read_sched_clock(void)
{
return timer_read();
}
static cycle_t clksrc_read(struct clocksource *cs)
{
return timer_read();
}
static struct clocksource clocksource_stc = {
.name = "stc",
.rating = 300,
.read = clksrc_read,
.mask = CLOCKSOURCE_MASK(32),
.flags = CLOCK_SOURCE_IS_CONTINUOUS,
};
unsigned long frc_clock_ticks32(void)
{
return timer_read();
}
static void __init bcm2708_clocksource_init(void)
{
if (clocksource_register_hz(&clocksource_stc, STC_FREQ_HZ)) {
printk(KERN_ERR "timer: failed to initialize clock "
"source %s\n", clocksource_stc.name);
}
}
struct clk __init *bcm2708_clk_register(const char *name, unsigned long fixed_rate)
{
struct clk *clk;
clk = clk_register_fixed_rate(NULL, name, NULL, CLK_IS_ROOT,
fixed_rate);
if (IS_ERR(clk))
pr_err("%s not registered\n", name);
return clk;
}
void __init bcm2708_register_clkdev(struct clk *clk, const char *name)
{
int ret;
ret = clk_register_clkdev(clk, NULL, name);
if (ret)
pr_err("%s alias not registered\n", name);
}
void __init bcm2708_init_clocks(void)
{
struct clk *clk;
clk = bcm2708_clk_register("uart0_clk", uart_clock);
bcm2708_register_clkdev(clk, "dev:f1");
clk = bcm2708_clk_register("sdhost_clk", 250000000);
bcm2708_register_clkdev(clk, "mmc-bcm2835.0");
bcm2708_register_clkdev(clk, "bcm2708_spi.0");
bcm2708_register_clkdev(clk, "bcm2708_i2c.0");
bcm2708_register_clkdev(clk, "bcm2708_i2c.1");
}
#define UART0_IRQ { IRQ_UART, 0 /*NO_IRQ*/ }
#define UART0_DMA { 15, 14 }
AMBA_DEVICE(uart0, "dev:f1", UART0, NULL);
static struct amba_device *amba_devs[] __initdata = {
&uart0_device,
};
static struct resource bcm2708_dmaengine_resources[] = {
{
.start = DMA_BASE,
.end = DMA_BASE + SZ_4K - 1,
.flags = IORESOURCE_MEM,
}, {
.start = IRQ_DMA0,
.end = IRQ_DMA0,
.flags = IORESOURCE_IRQ,
}, {
.start = IRQ_DMA1,
.end = IRQ_DMA1,
.flags = IORESOURCE_IRQ,
}, {
.start = IRQ_DMA2,
.end = IRQ_DMA2,
.flags = IORESOURCE_IRQ,
}, {
.start = IRQ_DMA3,
.end = IRQ_DMA3,
.flags = IORESOURCE_IRQ,
}, {
.start = IRQ_DMA4,
.end = IRQ_DMA4,
.flags = IORESOURCE_IRQ,
}, {
.start = IRQ_DMA5,
.end = IRQ_DMA5,
.flags = IORESOURCE_IRQ,
}, {
.start = IRQ_DMA6,
.end = IRQ_DMA6,
.flags = IORESOURCE_IRQ,
}, {
.start = IRQ_DMA7,
.end = IRQ_DMA7,
.flags = IORESOURCE_IRQ,
}, {
.start = IRQ_DMA8,
.end = IRQ_DMA8,
.flags = IORESOURCE_IRQ,
}, {
.start = IRQ_DMA9,
.end = IRQ_DMA9,
.flags = IORESOURCE_IRQ,
}, {
.start = IRQ_DMA10,
.end = IRQ_DMA10,
.flags = IORESOURCE_IRQ,
}, {
.start = IRQ_DMA11,
.end = IRQ_DMA11,
.flags = IORESOURCE_IRQ,
}, {
.start = IRQ_DMA12,
.end = IRQ_DMA12,
.flags = IORESOURCE_IRQ,
}
};
static struct platform_device bcm2708_dmaengine_device = {
.name = "bcm2708-dmaengine",
.id = -1,
.resource = bcm2708_dmaengine_resources,
.num_resources = ARRAY_SIZE(bcm2708_dmaengine_resources),
};
#if defined(CONFIG_W1_MASTER_GPIO) || defined(CONFIG_W1_MASTER_GPIO_MODULE)
static struct w1_gpio_platform_data w1_gpio_pdata = {
.pin = W1_GPIO,
.ext_pullup_enable_pin = W1_PULLUP,
.is_open_drain = 0,
};
static struct platform_device w1_device = {
.name = "w1-gpio",
.id = -1,
.dev.platform_data = &w1_gpio_pdata,
};
#endif
static struct pps_gpio_platform_data pps_gpio_info = {
.assert_falling_edge = false,
.capture_clear = false,
.gpio_pin = -1,
.gpio_label = "PPS",
};
static struct platform_device pps_gpio_device = {
.name = "pps-gpio",
.id = PLATFORM_DEVID_NONE,
.dev.platform_data = &pps_gpio_info,
};
static u64 fb_dmamask = DMA_BIT_MASK(DMA_MASK_BITS_COMMON);
static struct platform_device bcm2708_fb_device = {
.name = "bcm2708_fb",
.id = -1, /* only one bcm2708_fb */
.resource = NULL,
.num_resources = 0,
.dev = {
.dma_mask = &fb_dmamask,
.coherent_dma_mask = DMA_BIT_MASK(DMA_MASK_BITS_COMMON),
},
};
static struct plat_serial8250_port bcm2708_uart1_platform_data[] = {
{
.mapbase = UART1_BASE + 0x40,
.irq = IRQ_AUX,
.uartclk = 500000000,
.regshift = 2,
.iotype = UPIO_MEM,
.flags = UPF_SHARE_IRQ | UPF_FIXED_TYPE | UPF_FIXED_PORT |
UPF_IOREMAP | UPF_SKIP_TEST,
.type = PORT_16550,
},
{},
};
static struct platform_device bcm2708_uart1_device = {
.name = "serial8250",
.id = PLAT8250_DEV_PLATFORM,
.dev = {
.platform_data = bcm2708_uart1_platform_data,
},
};
static struct resource bcm2708_usb_resources[] = {
[0] = {
.start = USB_BASE,
.end = USB_BASE + SZ_128K - 1,
.flags = IORESOURCE_MEM,
},
[1] = {
.start = MPHI_BASE,
.end = MPHI_BASE + SZ_4K - 1,
.flags = IORESOURCE_MEM,
},
[2] = {
.start = IRQ_HOSTPORT,
.end = IRQ_HOSTPORT,
.flags = IORESOURCE_IRQ,
},
[3] = {
.start = IRQ_USB,
.end = IRQ_USB,
.flags = IORESOURCE_IRQ,
},
};
static u64 usb_dmamask = DMA_BIT_MASK(DMA_MASK_BITS_COMMON);
static struct platform_device bcm2708_usb_device = {
.name = "bcm2708_usb",
.id = -1, /* only one bcm2708_usb */
.resource = bcm2708_usb_resources,
.num_resources = ARRAY_SIZE(bcm2708_usb_resources),
.dev = {
.dma_mask = &usb_dmamask,
.coherent_dma_mask = DMA_BIT_MASK(DMA_MASK_BITS_COMMON),
},
};
static struct resource bcm2708_vcio_resources[] = {
{
.start = ARMCTRL_0_MAIL0_BASE,
.end = ARMCTRL_0_MAIL0_BASE + SZ_64 - 1,
.flags = IORESOURCE_MEM,
}, {
.start = IRQ_ARM_MAILBOX,
.end = IRQ_ARM_MAILBOX,
.flags = IORESOURCE_IRQ,
},
};
static u64 vcio_dmamask = DMA_BIT_MASK(DMA_MASK_BITS_COMMON);
static struct platform_device bcm2708_vcio_device = {
.name = "bcm2708_vcio",
.id = -1, /* only one VideoCore I/O area */
.resource = bcm2708_vcio_resources,
.num_resources = ARRAY_SIZE(bcm2708_vcio_resources),
.dev = {
.dma_mask = &vcio_dmamask,
.coherent_dma_mask = DMA_BIT_MASK(DMA_MASK_BITS_COMMON),
},
};
static struct resource bcm2708_vchiq_resources[] = {
{
.start = ARMCTRL_0_BELL_BASE,
.end = ARMCTRL_0_BELL_BASE + 16,
.flags = IORESOURCE_MEM,
}, {
.start = IRQ_ARM_DOORBELL_0,
.end = IRQ_ARM_DOORBELL_0,
.flags = IORESOURCE_IRQ,
},
};
static u64 vchiq_dmamask = DMA_BIT_MASK(DMA_MASK_BITS_COMMON);
static struct platform_device bcm2708_vchiq_device = {
.name = "bcm2835_vchiq",
.id = -1,
.resource = bcm2708_vchiq_resources,
.num_resources = ARRAY_SIZE(bcm2708_vchiq_resources),
.dev = {
.dma_mask = &vchiq_dmamask,
.coherent_dma_mask = DMA_BIT_MASK(DMA_MASK_BITS_COMMON),
},
};
#ifdef CONFIG_BCM2708_GPIO
#define BCM_GPIO_DRIVER_NAME "bcm2708_gpio"
static struct resource bcm2708_gpio_resources[] = {
[0] = { /* general purpose I/O */
.start = GPIO_BASE,
.end = GPIO_BASE + SZ_4K - 1,
.flags = IORESOURCE_MEM,
},
};
static u64 gpio_dmamask = DMA_BIT_MASK(DMA_MASK_BITS_COMMON);
static struct platform_device bcm2708_gpio_device = {
.name = BCM_GPIO_DRIVER_NAME,
.id = -1, /* only one VideoCore I/O area */
.resource = bcm2708_gpio_resources,
.num_resources = ARRAY_SIZE(bcm2708_gpio_resources),
.dev = {
.dma_mask = &gpio_dmamask,
.coherent_dma_mask = DMA_BIT_MASK(DMA_MASK_BITS_COMMON),
},
};
#endif
static struct resource bcm2708_systemtimer_resources[] = {
[0] = { /* system timer access */
.start = ST_BASE,
.end = ST_BASE + SZ_4K - 1,
.flags = IORESOURCE_MEM,
},
{
.start = IRQ_TIMER3,
.end = IRQ_TIMER3,
.flags = IORESOURCE_IRQ,
}
};
static u64 systemtimer_dmamask = DMA_BIT_MASK(DMA_MASK_BITS_COMMON);
static struct platform_device bcm2708_systemtimer_device = {
.name = "bcm2708_systemtimer",
.id = -1, /* only one VideoCore I/O area */
.resource = bcm2708_systemtimer_resources,
.num_resources = ARRAY_SIZE(bcm2708_systemtimer_resources),
.dev = {
.dma_mask = &systemtimer_dmamask,
.coherent_dma_mask = DMA_BIT_MASK(DMA_MASK_BITS_COMMON),
},
};
#ifdef CONFIG_MMC_BCM2835 /* Arasan emmc SD (new) */
static struct resource bcm2835_emmc_resources[] = {
[0] = {
.start = EMMC_BASE,
.end = EMMC_BASE + SZ_256 - 1, /* we only need this area */
/* the memory map actually makes SZ_4K available */
.flags = IORESOURCE_MEM,
},
[1] = {
.start = IRQ_ARASANSDIO,
.end = IRQ_ARASANSDIO,
.flags = IORESOURCE_IRQ,
},
};
static u64 bcm2835_emmc_dmamask = 0xffffffffUL;
struct platform_device bcm2835_emmc_device = {
.name = "mmc-bcm2835",
.id = 0,
.num_resources = ARRAY_SIZE(bcm2835_emmc_resources),
.resource = bcm2835_emmc_resources,
.dev = {
.dma_mask = &bcm2835_emmc_dmamask,
.coherent_dma_mask = 0xffffffffUL},
};
#endif /* CONFIG_MMC_BCM2835 */
static struct resource bcm2708_powerman_resources[] = {
[0] = {
.start = PM_BASE,
.end = PM_BASE + SZ_256 - 1,
.flags = IORESOURCE_MEM,
},
};
static u64 powerman_dmamask = DMA_BIT_MASK(DMA_MASK_BITS_COMMON);
struct platform_device bcm2708_powerman_device = {
.name = "bcm2708_powerman",
.id = 0,
.num_resources = ARRAY_SIZE(bcm2708_powerman_resources),
.resource = bcm2708_powerman_resources,
.dev = {
.dma_mask = &powerman_dmamask,
.coherent_dma_mask = 0xffffffffUL},
};
static struct platform_device bcm2708_alsa_devices[] = {
[0] = {
.name = "bcm2835_AUD0",
.id = 0, /* first audio device */
.resource = 0,
.num_resources = 0,
},
[1] = {
.name = "bcm2835_AUD1",
.id = 1, /* second audio device */
.resource = 0,
.num_resources = 0,
},
[2] = {
.name = "bcm2835_AUD2",
.id = 2, /* third audio device */
.resource = 0,
.num_resources = 0,
},
[3] = {
.name = "bcm2835_AUD3",
.id = 3, /* forth audio device */
.resource = 0,
.num_resources = 0,
},
[4] = {
.name = "bcm2835_AUD4",
.id = 4, /* fifth audio device */
.resource = 0,
.num_resources = 0,
},
[5] = {
.name = "bcm2835_AUD5",
.id = 5, /* sixth audio device */
.resource = 0,
.num_resources = 0,
},
[6] = {
.name = "bcm2835_AUD6",
.id = 6, /* seventh audio device */
.resource = 0,
.num_resources = 0,
},
[7] = {
.name = "bcm2835_AUD7",
.id = 7, /* eighth audio device */
.resource = 0,
.num_resources = 0,
},
};
static struct resource bcm2708_spi_resources[] = {
{
.start = SPI0_BASE,
.end = SPI0_BASE + SZ_256 - 1,
.flags = IORESOURCE_MEM,
}, {
.start = IRQ_SPI,
.end = IRQ_SPI,
.flags = IORESOURCE_IRQ,
}
};
static u64 bcm2708_spi_dmamask = DMA_BIT_MASK(DMA_MASK_BITS_COMMON);
static struct platform_device bcm2708_spi_device = {
.name = "bcm2708_spi",
.id = 0,
.num_resources = ARRAY_SIZE(bcm2708_spi_resources),
.resource = bcm2708_spi_resources,
.dev = {
.dma_mask = &bcm2708_spi_dmamask,
.coherent_dma_mask = DMA_BIT_MASK(DMA_MASK_BITS_COMMON)},
};
#ifdef CONFIG_BCM2708_SPIDEV
static struct spi_board_info bcm2708_spi_devices[] = {
#ifdef CONFIG_SPI_SPIDEV
{
.modalias = "spidev",
.max_speed_hz = 500000,
.bus_num = 0,
.chip_select = 0,
.mode = SPI_MODE_0,
}, {
.modalias = "spidev",
.max_speed_hz = 500000,
.bus_num = 0,
.chip_select = 1,
.mode = SPI_MODE_0,
}
#endif
};
#endif
static struct resource bcm2708_bsc0_resources[] = {
{
.start = BSC0_BASE,
.end = BSC0_BASE + SZ_256 - 1,
.flags = IORESOURCE_MEM,
}, {
.start = INTERRUPT_I2C,
.end = INTERRUPT_I2C,
.flags = IORESOURCE_IRQ,
}
};
static struct platform_device bcm2708_bsc0_device = {
.name = "bcm2708_i2c",
.id = 0,
.num_resources = ARRAY_SIZE(bcm2708_bsc0_resources),
.resource = bcm2708_bsc0_resources,
};
static struct resource bcm2708_bsc1_resources[] = {
{
.start = BSC1_BASE,
.end = BSC1_BASE + SZ_256 - 1,
.flags = IORESOURCE_MEM,
}, {
.start = INTERRUPT_I2C,
.end = INTERRUPT_I2C,
.flags = IORESOURCE_IRQ,
}
};
static struct platform_device bcm2708_bsc1_device = {
.name = "bcm2708_i2c",
.id = 1,
.num_resources = ARRAY_SIZE(bcm2708_bsc1_resources),
.resource = bcm2708_bsc1_resources,
};
static struct platform_device bcm2835_hwmon_device = {
.name = "bcm2835_hwmon",
};
static struct platform_device bcm2835_thermal_device = {
.name = "bcm2835_thermal",
};
#if defined(CONFIG_SND_BCM2708_SOC_I2S) || defined(CONFIG_SND_BCM2708_SOC_I2S_MODULE)
static struct resource bcm2708_i2s_resources[] = {
{
.start = I2S_BASE,
.end = I2S_BASE + 0x20,
.flags = IORESOURCE_MEM,
},
{
.start = PCM_CLOCK_BASE,
.end = PCM_CLOCK_BASE + 0x02,
.flags = IORESOURCE_MEM,
}
};
static struct platform_device bcm2708_i2s_device = {
.name = "bcm2708-i2s",
.id = 0,
.num_resources = ARRAY_SIZE(bcm2708_i2s_resources),
.resource = bcm2708_i2s_resources,
};
#endif
#if defined(CONFIG_SND_BCM2708_SOC_HIFIBERRY_DAC) || defined(CONFIG_SND_BCM2708_SOC_HIFIBERRY_DAC_MODULE)
static struct platform_device snd_hifiberry_dac_device = {
.name = "snd-hifiberry-dac",
.id = 0,
.num_resources = 0,
};
static struct platform_device snd_pcm5102a_codec_device = {
.name = "pcm5102a-codec",
.id = -1,
.num_resources = 0,
};
#endif
#if defined(CONFIG_SND_BCM2708_SOC_HIFIBERRY_DACPLUS) || defined(CONFIG_SND_BCM2708_SOC_HIFIBERRY_DACPLUS_MODULE)
static struct platform_device snd_rpi_hifiberry_dacplus_device = {
.name = "snd-rpi-hifiberry-dacplus",
.id = 0,
.num_resources = 0,
};
static struct i2c_board_info __initdata snd_pcm512x_hbdacplus_i2c_devices[] = {
{
I2C_BOARD_INFO("pcm5122", 0x4d)
},
};
#endif
#if defined(CONFIG_SND_BCM2708_SOC_HIFIBERRY_DIGI) || defined(CONFIG_SND_BCM2708_SOC_HIFIBERRY_DIGI_MODULE)
static struct platform_device snd_hifiberry_digi_device = {
.name = "snd-hifiberry-digi",
.id = 0,
.num_resources = 0,
};
static struct i2c_board_info __initdata snd_wm8804_i2c_devices[] = {
{
I2C_BOARD_INFO("wm8804", 0x3b)
},
};
#endif
#if defined(CONFIG_SND_BCM2708_SOC_HIFIBERRY_AMP) || defined(CONFIG_SND_BCM2708_SOC_HIFIBERRY_AMP_MODULE)
static struct platform_device snd_hifiberry_amp_device = {
.name = "snd-hifiberry-amp",
.id = 0,
.num_resources = 0,
};
static struct i2c_board_info __initdata snd_tas5713_i2c_devices[] = {
{
I2C_BOARD_INFO("tas5713", 0x1b)
},
};
#endif
#if defined(CONFIG_SND_BCM2708_SOC_RPI_DAC) || defined(CONFIG_SND_BCM2708_SOC_RPI_DAC_MODULE)
static struct platform_device snd_rpi_dac_device = {
.name = "snd-rpi-dac",
.id = 0,
.num_resources = 0,
};
static struct platform_device snd_pcm1794a_codec_device = {
.name = "pcm1794a-codec",
.id = -1,
.num_resources = 0,
};
#endif
#if defined(CONFIG_SND_BCM2708_SOC_IQAUDIO_DAC) || defined(CONFIG_SND_BCM2708_SOC_IQAUDIO_DAC_MODULE)
static struct platform_device snd_rpi_iqaudio_dac_device = {
.name = "snd-rpi-iqaudio-dac",
.id = 0,
.num_resources = 0,
};
// Use the actual device name rather than generic driver name
static struct i2c_board_info __initdata snd_pcm512x_i2c_devices[] = {
{
I2C_BOARD_INFO("pcm5122", 0x4c)
},
};
#endif
int __init bcm_register_device(struct platform_device *pdev)
{
int ret;
ret = platform_device_register(pdev);
if (ret)
pr_debug("Unable to register platform device '%s': %d\n",
pdev->name, ret);
return ret;
}
/*
* Use these macros for platform and i2c devices that are present in the
* Device Tree. This way the devices are only added on non-DT systems.
*/
#define bcm_register_device_dt(pdev) \
if (!use_dt) bcm_register_device(pdev)
#define i2c_register_board_info_dt(busnum, info, n) \
if (!use_dt) i2c_register_board_info(busnum, info, n)
int calc_rsts(int partition)
{
return PM_PASSWORD |
((partition & (1 << 0)) << 0) |
((partition & (1 << 1)) << 1) |
((partition & (1 << 2)) << 2) |
((partition & (1 << 3)) << 3) |
((partition & (1 << 4)) << 4) |
((partition & (1 << 5)) << 5);
}
static void bcm2708_restart(enum reboot_mode mode, const char *cmd)
{
extern char bcm2708_reboot_mode;
uint32_t pm_rstc, pm_wdog;
uint32_t timeout = 10;
uint32_t pm_rsts = 0;
if(bcm2708_reboot_mode == 'q')
{
// NOOBS < 1.3 booting with reboot=q
pm_rsts = readl(__io_address(PM_RSTS));
pm_rsts = PM_PASSWORD | pm_rsts | PM_RSTS_HADWRQ_SET;
}
else if(bcm2708_reboot_mode == 'p')
{
// NOOBS < 1.3 halting
pm_rsts = readl(__io_address(PM_RSTS));
pm_rsts = PM_PASSWORD | pm_rsts | PM_RSTS_HADWRH_SET;
}
else
{
pm_rsts = calc_rsts(reboot_part);
}
writel(pm_rsts, __io_address(PM_RSTS));
/* Setup watchdog for reset */
pm_rstc = readl(__io_address(PM_RSTC));
pm_wdog = PM_PASSWORD | (timeout & PM_WDOG_TIME_SET); // watchdog timer = timer clock / 16; need password (31:16) + value (11:0)
pm_rstc = PM_PASSWORD | (pm_rstc & PM_RSTC_WRCFG_CLR) | PM_RSTC_WRCFG_FULL_RESET;
writel(pm_wdog, __io_address(PM_WDOG));
writel(pm_rstc, __io_address(PM_RSTC));
}
/* We can't really power off, but if we do the normal reset scheme, and indicate to bootcode.bin not to reboot, then most of the chip will be powered off */
static void bcm2708_power_off(void)
{
extern char bcm2708_reboot_mode;
if(bcm2708_reboot_mode == 'q')
{
// NOOBS < v1.3
bcm2708_restart('p', "");
}
else
{
/* partition 63 is special code for HALT the bootloader knows not to boot*/
reboot_part = 63;
/* continue with normal reset mechanism */
bcm2708_restart(0, "");
}
}
#ifdef CONFIG_OF
static void __init bcm2708_dt_init(void)
{
int ret;
of_clk_init(NULL);
ret = of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
if (ret) {
pr_err("of_platform_populate failed: %d\n", ret);
/* Proceed as if CONFIG_OF was not defined */
} else {
use_dt = 1;
}
}
#else
static void __init bcm2708_dt_init(void) { }
#endif /* CONFIG_OF */
void __init bcm2708_init(void)
{
int i;
#if defined(CONFIG_BCM_VC_CMA)
vc_cma_early_init();
#endif
printk("bcm2708.uart_clock = %d\n", uart_clock);
pm_power_off = bcm2708_power_off;
bcm2708_init_clocks();
bcm2708_dt_init();
bcm_register_device_dt(&bcm2708_dmaengine_device);
bcm_register_device_dt(&bcm2708_vcio_device);
bcm_register_device_dt(&bcm2708_vchiq_device);
#ifdef CONFIG_BCM2708_GPIO
bcm_register_device_dt(&bcm2708_gpio_device);
#endif
#if defined(CONFIG_PPS_CLIENT_GPIO) || defined(CONFIG_PPS_CLIENT_GPIO_MODULE)
if (!use_dt && (pps_gpio_pin >= 0)) {
pr_info("bcm2708: GPIO %d setup as pps-gpio device\n", pps_gpio_pin);
pps_gpio_info.gpio_pin = pps_gpio_pin;
pps_gpio_device.id = pps_gpio_pin;
bcm_register_device(&pps_gpio_device);
}
#endif
#if defined(CONFIG_W1_MASTER_GPIO) || defined(CONFIG_W1_MASTER_GPIO_MODULE)
w1_gpio_pdata.pin = w1_gpio_pin;
w1_gpio_pdata.ext_pullup_enable_pin = w1_gpio_pullup;
bcm_register_device_dt(&w1_device);
#endif
bcm_register_device(&bcm2708_systemtimer_device);
bcm_register_device_dt(&bcm2708_fb_device);
bcm_register_device_dt(&bcm2708_usb_device);
bcm_register_device(&bcm2708_uart1_device);
bcm_register_device(&bcm2708_powerman_device);
#ifdef CONFIG_MMC_BCM2835
bcm_register_device_dt(&bcm2835_emmc_device);
#endif
bcm2708_init_led();
/* Only create the platform devices for the ALSA driver in the
absence of an enabled "audio" DT node */
if (!use_dt ||
!of_device_is_available(of_find_node_by_path("/audio"))) {
for (i = 0; i < ARRAY_SIZE(bcm2708_alsa_devices); i++)
bcm_register_device(&bcm2708_alsa_devices[i]);
}
bcm_register_device_dt(&bcm2708_spi_device);
if (vc_i2c_override) {
bcm_register_device_dt(&bcm2708_bsc0_device);
bcm_register_device_dt(&bcm2708_bsc1_device);
} else if ((boardrev & 0xffffff) == 0x2 || (boardrev & 0xffffff) == 0x3) {
bcm_register_device_dt(&bcm2708_bsc0_device);
} else {
bcm_register_device_dt(&bcm2708_bsc1_device);
}
bcm_register_device(&bcm2835_hwmon_device);
bcm_register_device(&bcm2835_thermal_device);
#if defined(CONFIG_SND_BCM2708_SOC_I2S) || defined(CONFIG_SND_BCM2708_SOC_I2S_MODULE)
bcm_register_device_dt(&bcm2708_i2s_device);
#endif
#if defined(CONFIG_SND_BCM2708_SOC_HIFIBERRY_DAC) || defined(CONFIG_SND_BCM2708_SOC_HIFIBERRY_DAC_MODULE)
bcm_register_device_dt(&snd_hifiberry_dac_device);
bcm_register_device_dt(&snd_pcm5102a_codec_device);
#endif
#if defined(CONFIG_SND_BCM2708_SOC_HIFIBERRY_DACPLUS) || defined(CONFIG_SND_BCM2708_SOC_HIFIBERRY_DACPLUS_MODULE)
bcm_register_device_dt(&snd_rpi_hifiberry_dacplus_device);
i2c_register_board_info_dt(1, snd_pcm512x_hbdacplus_i2c_devices, ARRAY_SIZE(snd_pcm512x_hbdacplus_i2c_devices));