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linux_old1/arch/arm/mach-pxa/viper.c

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/*
* linux/arch/arm/mach-pxa/viper.c
*
* Support for the Arcom VIPER SBC.
*
* Author: Ian Campbell
* Created: Feb 03, 2003
* Copyright: Arcom Control Systems
*
* Maintained by Marc Zyngier <maz@misterjones.org>
* <marc.zyngier@altran.com>
*
* Based on lubbock.c:
* Author: Nicolas Pitre
* Created: Jun 15, 2001
* Copyright: MontaVista Software Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/types.h>
#include <linux/memory.h>
#include <linux/cpu.h>
#include <linux/cpufreq.h>
#include <linux/delay.h>
#include <linux/fs.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/major.h>
#include <linux/module.h>
#include <linux/pm.h>
#include <linux/sched.h>
#include <linux/gpio.h>
#include <linux/i2c-gpio.h>
#include <linux/serial_8250.h>
#include <linux/smc91x.h>
#include <linux/pwm_backlight.h>
#include <linux/usb/isp116x.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/partitions.h>
#include <linux/mtd/physmap.h>
#include <mach/pxa25x.h>
#include <mach/audio.h>
#include <mach/pxafb.h>
#include <plat/i2c.h>
#include <mach/regs-uart.h>
#include <mach/arcom-pcmcia.h>
#include <mach/viper.h>
#include <asm/setup.h>
#include <asm/mach-types.h>
#include <asm/irq.h>
#include <asm/sizes.h>
#include <asm/mach/arch.h>
#include <asm/mach/map.h>
#include <asm/mach/irq.h>
#include "generic.h"
#include "devices.h"
static unsigned int icr;
static void viper_icr_set_bit(unsigned int bit)
{
icr |= bit;
VIPER_ICR = icr;
}
static void viper_icr_clear_bit(unsigned int bit)
{
icr &= ~bit;
VIPER_ICR = icr;
}
/* This function is used from the pcmcia module to reset the CF */
static void viper_cf_reset(int state)
{
if (state)
viper_icr_set_bit(VIPER_ICR_CF_RST);
else
viper_icr_clear_bit(VIPER_ICR_CF_RST);
}
static struct arcom_pcmcia_pdata viper_pcmcia_info = {
.cd_gpio = VIPER_CF_CD_GPIO,
.rdy_gpio = VIPER_CF_RDY_GPIO,
.pwr_gpio = VIPER_CF_POWER_GPIO,
.reset = viper_cf_reset,
};
static struct platform_device viper_pcmcia_device = {
.name = "viper-pcmcia",
.id = -1,
.dev = {
.platform_data = &viper_pcmcia_info,
},
};
/*
* The CPLD version register was not present on VIPER boards prior to
* v2i1. On v1 boards where the version register is not present we
* will just read back the previous value from the databus.
*
* Therefore we do two reads. The first time we write 0 to the
* (read-only) register before reading and the second time we write
* 0xff first. If the two reads do not match or they read back as 0xff
* or 0x00 then we have version 1 hardware.
*/
static u8 viper_hw_version(void)
{
u8 v1, v2;
unsigned long flags;
local_irq_save(flags);
VIPER_VERSION = 0;
v1 = VIPER_VERSION;
VIPER_VERSION = 0xff;
v2 = VIPER_VERSION;
v1 = (v1 != v2 || v1 == 0xff) ? 0 : v1;
local_irq_restore(flags);
return v1;
}
/* CPU sysdev */
static int viper_cpu_suspend(struct sys_device *sysdev, pm_message_t state)
{
viper_icr_set_bit(VIPER_ICR_R_DIS);
return 0;
}
static int viper_cpu_resume(struct sys_device *sysdev)
{
viper_icr_clear_bit(VIPER_ICR_R_DIS);
return 0;
}
static struct sysdev_driver viper_cpu_sysdev_driver = {
.suspend = viper_cpu_suspend,
.resume = viper_cpu_resume,
};
static unsigned int current_voltage_divisor;
/*
* If force is not true then step from existing to new divisor. If
* force is true then jump straight to the new divisor. Stepping is
* used because if the jump in voltage is too large, the VCC can dip
* too low and the regulator cuts out.
*
* force can be used to initialize the divisor to a know state by
* setting the value for the current clock speed, since we are already
* running at that speed we know the voltage should be pretty close so
* the jump won't be too large
*/
static void viper_set_core_cpu_voltage(unsigned long khz, int force)
{
int i = 0;
unsigned int divisor = 0;
const char *v;
if (khz < 200000) {
v = "1.0"; divisor = 0xfff;
} else if (khz < 300000) {
v = "1.1"; divisor = 0xde5;
} else {
v = "1.3"; divisor = 0x325;
}
pr_debug("viper: setting CPU core voltage to %sV at %d.%03dMHz\n",
v, (int)khz / 1000, (int)khz % 1000);
#define STEP 0x100
do {
int step;
if (force)
step = divisor;
else if (current_voltage_divisor < divisor - STEP)
step = current_voltage_divisor + STEP;
else if (current_voltage_divisor > divisor + STEP)
step = current_voltage_divisor - STEP;
else
step = divisor;
force = 0;
gpio_set_value(VIPER_PSU_CLK_GPIO, 0);
gpio_set_value(VIPER_PSU_nCS_LD_GPIO, 0);
for (i = 1 << 11 ; i > 0 ; i >>= 1) {
udelay(1);
gpio_set_value(VIPER_PSU_DATA_GPIO, step & i);
udelay(1);
gpio_set_value(VIPER_PSU_CLK_GPIO, 1);
udelay(1);
gpio_set_value(VIPER_PSU_CLK_GPIO, 0);
}
udelay(1);
gpio_set_value(VIPER_PSU_nCS_LD_GPIO, 1);
udelay(1);
gpio_set_value(VIPER_PSU_nCS_LD_GPIO, 0);
current_voltage_divisor = step;
} while (current_voltage_divisor != divisor);
}
/* Interrupt handling */
static unsigned long viper_irq_enabled_mask;
static const int viper_isa_irqs[] = { 3, 4, 5, 6, 7, 10, 11, 12, 9, 14, 15 };
static const int viper_isa_irq_map[] = {
0, /* ISA irq #0, invalid */
0, /* ISA irq #1, invalid */
0, /* ISA irq #2, invalid */
1 << 0, /* ISA irq #3 */
1 << 1, /* ISA irq #4 */
1 << 2, /* ISA irq #5 */
1 << 3, /* ISA irq #6 */
1 << 4, /* ISA irq #7 */
0, /* ISA irq #8, invalid */
1 << 8, /* ISA irq #9 */
1 << 5, /* ISA irq #10 */
1 << 6, /* ISA irq #11 */
1 << 7, /* ISA irq #12 */
0, /* ISA irq #13, invalid */
1 << 9, /* ISA irq #14 */
1 << 10, /* ISA irq #15 */
};
static inline int viper_irq_to_bitmask(unsigned int irq)
{
return viper_isa_irq_map[irq - PXA_ISA_IRQ(0)];
}
static inline int viper_bit_to_irq(int bit)
{
return viper_isa_irqs[bit] + PXA_ISA_IRQ(0);
}
static void viper_ack_irq(unsigned int irq)
{
int viper_irq = viper_irq_to_bitmask(irq);
if (viper_irq & 0xff)
VIPER_LO_IRQ_STATUS = viper_irq;
else
VIPER_HI_IRQ_STATUS = (viper_irq >> 8);
}
static void viper_mask_irq(unsigned int irq)
{
viper_irq_enabled_mask &= ~(viper_irq_to_bitmask(irq));
}
static void viper_unmask_irq(unsigned int irq)
{
viper_irq_enabled_mask |= viper_irq_to_bitmask(irq);
}
static inline unsigned long viper_irq_pending(void)
{
return (VIPER_HI_IRQ_STATUS << 8 | VIPER_LO_IRQ_STATUS) &
viper_irq_enabled_mask;
}
static void viper_irq_handler(unsigned int irq, struct irq_desc *desc)
{
unsigned long pending;
pending = viper_irq_pending();
do {
/* we're in a chained irq handler,
* so ack the interrupt by hand */
GEDR(VIPER_CPLD_GPIO) = GPIO_bit(VIPER_CPLD_GPIO);
if (likely(pending)) {
irq = viper_bit_to_irq(__ffs(pending));
generic_handle_irq(irq);
}
pending = viper_irq_pending();
} while (pending);
}
static struct irq_chip viper_irq_chip = {
.name = "ISA",
.ack = viper_ack_irq,
.mask = viper_mask_irq,
.unmask = viper_unmask_irq
};
static void __init viper_init_irq(void)
{
int level;
int isa_irq;
pxa25x_init_irq();
/* setup ISA IRQs */
for (level = 0; level < ARRAY_SIZE(viper_isa_irqs); level++) {
isa_irq = viper_bit_to_irq(level);
set_irq_chip(isa_irq, &viper_irq_chip);
set_irq_handler(isa_irq, handle_edge_irq);
set_irq_flags(isa_irq, IRQF_VALID | IRQF_PROBE);
}
set_irq_chained_handler(gpio_to_irq(VIPER_CPLD_GPIO),
viper_irq_handler);
set_irq_type(gpio_to_irq(VIPER_CPLD_GPIO), IRQ_TYPE_EDGE_BOTH);
}
/* Flat Panel */
static struct pxafb_mode_info fb_mode_info[] = {
{
.pixclock = 157500,
.xres = 320,
.yres = 240,
.bpp = 16,
.hsync_len = 63,
.left_margin = 7,
.right_margin = 13,
.vsync_len = 20,
.upper_margin = 0,
.lower_margin = 0,
.sync = 0,
},
};
static struct pxafb_mach_info fb_info = {
.modes = fb_mode_info,
.num_modes = 1,
.lcd_conn = LCD_COLOR_TFT_16BPP | LCD_PCLK_EDGE_FALL,
};
static int viper_backlight_init(struct device *dev)
{
int ret;
/* GPIO9 and 10 control FB backlight. Initialise to off */
ret = gpio_request(VIPER_BCKLIGHT_EN_GPIO, "Backlight");
if (ret)
goto err_request_bckl;
ret = gpio_request(VIPER_LCD_EN_GPIO, "LCD");
if (ret)
goto err_request_lcd;
ret = gpio_direction_output(VIPER_BCKLIGHT_EN_GPIO, 0);
if (ret)
goto err_dir;
ret = gpio_direction_output(VIPER_LCD_EN_GPIO, 0);
if (ret)
goto err_dir;
return 0;
err_dir:
gpio_free(VIPER_LCD_EN_GPIO);
err_request_lcd:
gpio_free(VIPER_BCKLIGHT_EN_GPIO);
err_request_bckl:
dev_err(dev, "Failed to setup LCD GPIOs\n");
return ret;
}
static int viper_backlight_notify(struct device *dev, int brightness)
{
gpio_set_value(VIPER_LCD_EN_GPIO, !!brightness);
gpio_set_value(VIPER_BCKLIGHT_EN_GPIO, !!brightness);
return brightness;
}
static void viper_backlight_exit(struct device *dev)
{
gpio_free(VIPER_LCD_EN_GPIO);
gpio_free(VIPER_BCKLIGHT_EN_GPIO);
}
static struct platform_pwm_backlight_data viper_backlight_data = {
.pwm_id = 0,
.max_brightness = 100,
.dft_brightness = 100,
.pwm_period_ns = 1000000,
.init = viper_backlight_init,
.notify = viper_backlight_notify,
.exit = viper_backlight_exit,
};
static struct platform_device viper_backlight_device = {
.name = "pwm-backlight",
.dev = {
.parent = &pxa25x_device_pwm0.dev,
.platform_data = &viper_backlight_data,
},
};
/* Ethernet */
static struct resource smc91x_resources[] = {
[0] = {
.name = "smc91x-regs",
.start = VIPER_ETH_PHYS + 0x300,
.end = VIPER_ETH_PHYS + 0x30f,
.flags = IORESOURCE_MEM,
},
[1] = {
.start = gpio_to_irq(VIPER_ETH_GPIO),
.end = gpio_to_irq(VIPER_ETH_GPIO),
.flags = IORESOURCE_IRQ | IORESOURCE_IRQ_HIGHEDGE,
},
[2] = {
.name = "smc91x-data32",
.start = VIPER_ETH_DATA_PHYS,
.end = VIPER_ETH_DATA_PHYS + 3,
.flags = IORESOURCE_MEM,
},
};
static struct smc91x_platdata viper_smc91x_info = {
.flags = SMC91X_USE_16BIT | SMC91X_NOWAIT,
.leda = RPC_LED_100_10,
.ledb = RPC_LED_TX_RX,
};
static struct platform_device smc91x_device = {
.name = "smc91x",
.id = -1,
.num_resources = ARRAY_SIZE(smc91x_resources),
.resource = smc91x_resources,
.dev = {
.platform_data = &viper_smc91x_info,
},
};
/* i2c */
static struct i2c_gpio_platform_data i2c_bus_data = {
.sda_pin = VIPER_RTC_I2C_SDA_GPIO,
.scl_pin = VIPER_RTC_I2C_SCL_GPIO,
.udelay = 10,
.timeout = 100,
};
static struct platform_device i2c_bus_device = {
.name = "i2c-gpio",
.id = 1, /* pxa2xx-i2c is bus 0, so start at 1 */
.dev = {
.platform_data = &i2c_bus_data,
}
};
static struct i2c_board_info __initdata viper_i2c_devices[] = {
{
I2C_BOARD_INFO("ds1338", 0x68),
},
};
/*
* Serial configuration:
* You can either have the standard PXA ports driven by the PXA driver,
* or all the ports (PXA + 16850) driven by the 8250 driver.
* Choose your poison.
*/
static struct resource viper_serial_resources[] = {
#ifndef CONFIG_SERIAL_PXA
{
.start = 0x40100000,
.end = 0x4010001f,
.flags = IORESOURCE_MEM,
},
{
.start = 0x40200000,
.end = 0x4020001f,
.flags = IORESOURCE_MEM,
},
{
.start = 0x40700000,
.end = 0x4070001f,
.flags = IORESOURCE_MEM,
},
{
.start = VIPER_UARTA_PHYS,
.end = VIPER_UARTA_PHYS + 0xf,
.flags = IORESOURCE_MEM,
},
{
.start = VIPER_UARTB_PHYS,
.end = VIPER_UARTB_PHYS + 0xf,
.flags = IORESOURCE_MEM,
},
#else
{
0,
},
#endif
};
static struct plat_serial8250_port serial_platform_data[] = {
#ifndef CONFIG_SERIAL_PXA
/* Internal UARTs */
{
.membase = (void *)&FFUART,
.mapbase = __PREG(FFUART),
.irq = IRQ_FFUART,
.uartclk = 921600 * 16,
.regshift = 2,
.flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
.iotype = UPIO_MEM,
},
{
.membase = (void *)&BTUART,
.mapbase = __PREG(BTUART),
.irq = IRQ_BTUART,
.uartclk = 921600 * 16,
.regshift = 2,
.flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
.iotype = UPIO_MEM,
},
{
.membase = (void *)&STUART,
.mapbase = __PREG(STUART),
.irq = IRQ_STUART,
.uartclk = 921600 * 16,
.regshift = 2,
.flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
.iotype = UPIO_MEM,
},
/* External UARTs */
{
.mapbase = VIPER_UARTA_PHYS,
.irq = gpio_to_irq(VIPER_UARTA_GPIO),
.irqflags = IRQF_TRIGGER_RISING,
.uartclk = 1843200,
.regshift = 1,
.iotype = UPIO_MEM,
.flags = UPF_BOOT_AUTOCONF | UPF_IOREMAP |
UPF_SKIP_TEST,
},
{
.mapbase = VIPER_UARTB_PHYS,
.irq = gpio_to_irq(VIPER_UARTB_GPIO),
.irqflags = IRQF_TRIGGER_RISING,
.uartclk = 1843200,
.regshift = 1,
.iotype = UPIO_MEM,
.flags = UPF_BOOT_AUTOCONF | UPF_IOREMAP |
UPF_SKIP_TEST,
},
#endif
{ },
};
static struct platform_device serial_device = {
.name = "serial8250",
.id = 0,
.dev = {
.platform_data = serial_platform_data,
},
.num_resources = ARRAY_SIZE(viper_serial_resources),
.resource = viper_serial_resources,
};
/* USB */
static void isp116x_delay(struct device *dev, int delay)
{
ndelay(delay);
}
static struct resource isp116x_resources[] = {
[0] = { /* DATA */
.start = VIPER_USB_PHYS + 0,
.end = VIPER_USB_PHYS + 1,
.flags = IORESOURCE_MEM,
},
[1] = { /* ADDR */
.start = VIPER_USB_PHYS + 2,
.end = VIPER_USB_PHYS + 3,
.flags = IORESOURCE_MEM,
},
[2] = {
.start = gpio_to_irq(VIPER_USB_GPIO),
.end = gpio_to_irq(VIPER_USB_GPIO),
.flags = IORESOURCE_IRQ | IORESOURCE_IRQ_HIGHEDGE,
},
};
/* (DataBusWidth16|AnalogOCEnable|DREQOutputPolarity|DownstreamPort15KRSel ) */
static struct isp116x_platform_data isp116x_platform_data = {
/* Enable internal resistors on downstream ports */
.sel15Kres = 1,
/* On-chip overcurrent protection */
.oc_enable = 1,
/* INT output polarity */
.int_act_high = 1,
/* INT edge or level triggered */
.int_edge_triggered = 0,
/* WAKEUP pin connected - NOT SUPPORTED */
/* .remote_wakeup_connected = 0, */
/* Wakeup by devices on usb bus enabled */
.remote_wakeup_enable = 0,
.delay = isp116x_delay,
};
static struct platform_device isp116x_device = {
.name = "isp116x-hcd",
.id = -1,
.num_resources = ARRAY_SIZE(isp116x_resources),
.resource = isp116x_resources,
.dev = {
.platform_data = &isp116x_platform_data,
},
};
/* MTD */
static struct resource mtd_resources[] = {
[0] = { /* RedBoot config + filesystem flash */
.start = VIPER_FLASH_PHYS,
.end = VIPER_FLASH_PHYS + SZ_32M - 1,
.flags = IORESOURCE_MEM,
},
[1] = { /* Boot flash */
.start = VIPER_BOOT_PHYS,
.end = VIPER_BOOT_PHYS + SZ_1M - 1,
.flags = IORESOURCE_MEM,
},
[2] = { /*
* SRAM size is actually 256KB, 8bits, with a sparse mapping
* (each byte is on a 16bit boundary).
*/
.start = _VIPER_SRAM_BASE,
.end = _VIPER_SRAM_BASE + SZ_512K - 1,
.flags = IORESOURCE_MEM,
},
};
static struct mtd_partition viper_boot_flash_partition = {
.name = "RedBoot",
.size = SZ_1M,
.offset = 0,
.mask_flags = MTD_WRITEABLE, /* force R/O */
};
static struct physmap_flash_data viper_flash_data[] = {
[0] = {
.width = 2,
.parts = NULL,
.nr_parts = 0,
},
[1] = {
.width = 2,
.parts = &viper_boot_flash_partition,
.nr_parts = 1,
},
};
static struct platform_device viper_mtd_devices[] = {
[0] = {
.name = "physmap-flash",
.id = 0,
.dev = {
.platform_data = &viper_flash_data[0],
},
.resource = &mtd_resources[0],
.num_resources = 1,
},
[1] = {
.name = "physmap-flash",
.id = 1,
.dev = {
.platform_data = &viper_flash_data[1],
},
.resource = &mtd_resources[1],
.num_resources = 1,
},
};
static struct platform_device *viper_devs[] __initdata = {
&smc91x_device,
&i2c_bus_device,
&serial_device,
&isp116x_device,
&viper_mtd_devices[0],
&viper_mtd_devices[1],
&viper_backlight_device,
&viper_pcmcia_device,
};
static mfp_cfg_t viper_pin_config[] __initdata = {
/* Chip selects */
GPIO15_nCS_1,
GPIO78_nCS_2,
GPIO79_nCS_3,
GPIO80_nCS_4,
GPIO33_nCS_5,
/* FP Backlight */
GPIO9_GPIO, /* VIPER_BCKLIGHT_EN_GPIO */
GPIO10_GPIO, /* VIPER_LCD_EN_GPIO */
GPIO16_PWM0_OUT,
/* Ethernet PHY Ready */
GPIO18_RDY,
/* Serial shutdown */
GPIO12_GPIO | MFP_LPM_DRIVE_HIGH, /* VIPER_UART_SHDN_GPIO */
/* Compact-Flash / PC104 */
GPIO48_nPOE,
GPIO49_nPWE,
GPIO50_nPIOR,
GPIO51_nPIOW,
GPIO52_nPCE_1,
GPIO53_nPCE_2,
GPIO54_nPSKTSEL,
GPIO55_nPREG,
GPIO56_nPWAIT,
GPIO57_nIOIS16,
GPIO8_GPIO, /* VIPER_CF_RDY_GPIO */
GPIO32_GPIO, /* VIPER_CF_CD_GPIO */
GPIO82_GPIO, /* VIPER_CF_POWER_GPIO */
/* Integrated UPS control */
GPIO20_GPIO, /* VIPER_UPS_GPIO */
/* Vcc regulator control */
GPIO6_GPIO, /* VIPER_PSU_DATA_GPIO */
GPIO11_GPIO, /* VIPER_PSU_CLK_GPIO */
GPIO19_GPIO, /* VIPER_PSU_nCS_LD_GPIO */
/* i2c busses */
GPIO26_GPIO, /* VIPER_TPM_I2C_SDA_GPIO */
GPIO27_GPIO, /* VIPER_TPM_I2C_SCL_GPIO */
GPIO83_GPIO, /* VIPER_RTC_I2C_SDA_GPIO */
GPIO84_GPIO, /* VIPER_RTC_I2C_SCL_GPIO */
/* PC/104 Interrupt */
GPIO1_GPIO | WAKEUP_ON_EDGE_RISE, /* VIPER_CPLD_GPIO */
};
static unsigned long viper_tpm;
static int __init viper_tpm_setup(char *str)
{
strict_strtoul(str, 10, &viper_tpm);
return 1;
}
__setup("tpm=", viper_tpm_setup);
static void __init viper_tpm_init(void)
{
struct platform_device *tpm_device;
struct i2c_gpio_platform_data i2c_tpm_data = {
.sda_pin = VIPER_TPM_I2C_SDA_GPIO,
.scl_pin = VIPER_TPM_I2C_SCL_GPIO,
.udelay = 10,
.timeout = 100,
};
char *errstr;
/* Allocate TPM i2c bus if requested */
if (!viper_tpm)
return;
tpm_device = platform_device_alloc("i2c-gpio", 2);
if (tpm_device) {
if (!platform_device_add_data(tpm_device,
&i2c_tpm_data,
sizeof(i2c_tpm_data))) {
if (platform_device_add(tpm_device)) {
errstr = "register TPM i2c bus";
goto error_free_tpm;
}
} else {
errstr = "allocate TPM i2c bus data";
goto error_free_tpm;
}
} else {
errstr = "allocate TPM i2c device";
goto error_tpm;
}
return;
error_free_tpm:
kfree(tpm_device);
error_tpm:
pr_err("viper: Couldn't %s, giving up\n", errstr);
}
static void __init viper_init_vcore_gpios(void)
{
if (gpio_request(VIPER_PSU_DATA_GPIO, "PSU data"))
goto err_request_data;
if (gpio_request(VIPER_PSU_CLK_GPIO, "PSU clock"))
goto err_request_clk;
if (gpio_request(VIPER_PSU_nCS_LD_GPIO, "PSU cs"))
goto err_request_cs;
if (gpio_direction_output(VIPER_PSU_DATA_GPIO, 0) ||
gpio_direction_output(VIPER_PSU_CLK_GPIO, 0) ||
gpio_direction_output(VIPER_PSU_nCS_LD_GPIO, 0))
goto err_dir;
/* c/should assume redboot set the correct level ??? */
viper_set_core_cpu_voltage(get_clk_frequency_khz(0), 1);
return;
err_dir:
gpio_free(VIPER_PSU_nCS_LD_GPIO);
err_request_cs:
gpio_free(VIPER_PSU_CLK_GPIO);
err_request_clk:
gpio_free(VIPER_PSU_DATA_GPIO);
err_request_data:
pr_err("viper: Failed to setup vcore control GPIOs\n");
}
static void __init viper_init_serial_gpio(void)
{
if (gpio_request(VIPER_UART_SHDN_GPIO, "UARTs shutdown"))
goto err_request;
if (gpio_direction_output(VIPER_UART_SHDN_GPIO, 0))
goto err_dir;
return;
err_dir:
gpio_free(VIPER_UART_SHDN_GPIO);
err_request:
pr_err("viper: Failed to setup UART shutdown GPIO\n");
}
#ifdef CONFIG_CPU_FREQ
static int viper_cpufreq_notifier(struct notifier_block *nb,
unsigned long val, void *data)
{
struct cpufreq_freqs *freq = data;
/* TODO: Adjust timings??? */
switch (val) {
case CPUFREQ_PRECHANGE:
if (freq->old < freq->new) {
/* we are getting faster so raise the voltage
* before we change freq */
viper_set_core_cpu_voltage(freq->new, 0);
}
break;
case CPUFREQ_POSTCHANGE:
if (freq->old > freq->new) {
/* we are slowing down so drop the power
* after we change freq */
viper_set_core_cpu_voltage(freq->new, 0);
}
break;
case CPUFREQ_RESUMECHANGE:
viper_set_core_cpu_voltage(freq->new, 0);
break;
default:
/* ignore */
break;
}
return 0;
}
static struct notifier_block viper_cpufreq_notifier_block = {
.notifier_call = viper_cpufreq_notifier
};
static void __init viper_init_cpufreq(void)
{
if (cpufreq_register_notifier(&viper_cpufreq_notifier_block,
CPUFREQ_TRANSITION_NOTIFIER))
pr_err("viper: Failed to setup cpufreq notifier\n");
}
#else
static inline void viper_init_cpufreq(void) {}
#endif
static void viper_power_off(void)
{
pr_notice("Shutting off UPS\n");
gpio_set_value(VIPER_UPS_GPIO, 1);
/* Spin to death... */
while (1);
}
static void __init viper_init(void)
{
u8 version;
pm_power_off = viper_power_off;
pxa2xx_mfp_config(ARRAY_AND_SIZE(viper_pin_config));
pxa_set_ffuart_info(NULL);
pxa_set_btuart_info(NULL);
pxa_set_stuart_info(NULL);
/* Wake-up serial console */
viper_init_serial_gpio();
set_pxa_fb_info(&fb_info);
/* v1 hardware cannot use the datacs line */
version = viper_hw_version();
if (version == 0)
smc91x_device.num_resources--;
pxa_set_i2c_info(NULL);
platform_add_devices(viper_devs, ARRAY_SIZE(viper_devs));
viper_init_vcore_gpios();
viper_init_cpufreq();
sysdev_driver_register(&cpu_sysdev_class, &viper_cpu_sysdev_driver);
if (version) {
pr_info("viper: hardware v%di%d detected. "
"CPLD revision %d.\n",
VIPER_BOARD_VERSION(version),
VIPER_BOARD_ISSUE(version),
VIPER_CPLD_REVISION(version));
system_rev = (VIPER_BOARD_VERSION(version) << 8) |
(VIPER_BOARD_ISSUE(version) << 4) |
VIPER_CPLD_REVISION(version);
} else {
pr_info("viper: No version register.\n");
}
i2c_register_board_info(1, ARRAY_AND_SIZE(viper_i2c_devices));
viper_tpm_init();
pxa_set_ac97_info(NULL);
}
static struct map_desc viper_io_desc[] __initdata = {
{
.virtual = VIPER_CPLD_BASE,
.pfn = __phys_to_pfn(VIPER_CPLD_PHYS),
.length = 0x00300000,
.type = MT_DEVICE,
},
{
.virtual = VIPER_PC104IO_BASE,
.pfn = __phys_to_pfn(0x30000000),
.length = 0x00800000,
.type = MT_DEVICE,
},
};
static void __init viper_map_io(void)
{
pxa_map_io();
iotable_init(viper_io_desc, ARRAY_SIZE(viper_io_desc));
PCFR |= PCFR_OPDE;
}
MACHINE_START(VIPER, "Arcom/Eurotech VIPER SBC")
/* Maintainer: Marc Zyngier <maz@misterjones.org> */
.phys_io = 0x40000000,
.io_pg_offst = (io_p2v(0x40000000) >> 18) & 0xfffc,
.boot_params = 0xa0000100,
.map_io = viper_map_io,
.init_irq = viper_init_irq,
.timer = &pxa_timer,
.init_machine = viper_init,
MACHINE_END
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