diff options
Diffstat (limited to 'arch/arm/mach-pxa/viper.c')
| -rw-r--r-- | arch/arm/mach-pxa/viper.c | 951 |
1 files changed, 951 insertions, 0 deletions
diff --git a/arch/arm/mach-pxa/viper.c b/arch/arm/mach-pxa/viper.c new file mode 100644 index 0000000..d7632f6 --- /dev/null +++ b/arch/arm/mach-pxa/viper.c @@ -0,0 +1,951 @@ +/* + * 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/pxa-regs.h> +#include <mach/pxa2xx-regs.h> +#include <mach/bitfield.h> +#include <mach/audio.h> +#include <mach/pxafb.h> +#include <mach/mfp-pxa25x.h> +#include <mach/i2c.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 */ +void viper_cf_rst(int state) +{ + if (state) + viper_icr_set_bit(VIPER_ICR_CF_RST); + else + viper_icr_clear_bit(VIPER_ICR_CF_RST); +} +EXPORT_SYMBOL(viper_cf_rst); + +/* + * 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 void viper_ack_irq(unsigned int irq) +{ + int viper_irq = irq - PXA_ISA_IRQ(0); + + if (viper_irq < 8) + VIPER_LO_IRQ_STATUS = 1 << viper_irq; + else + VIPER_HI_IRQ_STATUS = 1 << (viper_irq - 8); +} + +static void viper_mask_irq(unsigned int irq) +{ + viper_irq_enabled_mask &= ~(1 << (irq - PXA_ISA_IRQ(0))); +} + +static void viper_unmask_irq(unsigned int irq) +{ + viper_irq_enabled_mask |= (1 << (irq - PXA_ISA_IRQ(0))); +} + +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 { + if (likely(pending)) { + irq = PXA_ISA_IRQ(0) + __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) +{ + const int isa_irqs[] = { 3, 4, 5, 6, 7, 10, 11, 12, 9, 14, 15 }; + int irq; + int isa_irq; + + pxa25x_init_irq(); + + /* setup ISA IRQs */ + for (irq = 0; irq < ARRAY_SIZE(isa_irqs); irq++) { + isa_irq = isa_irqs[irq]; + 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); + +#ifndef CONFIG_SERIAL_PXA + /* + * 8250 doesn't support IRQ_TYPE being passed as part + * of the plat_serial8250_port structure... + */ + set_irq_type(gpio_to_irq(VIPER_UARTA_GPIO), IRQ_TYPE_EDGE_RISING); + set_irq_type(gpio_to_irq(VIPER_UARTB_GPIO), IRQ_TYPE_EDGE_RISING); +#endif +} + +/* 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(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), + .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), + .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, +}; + +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)); + + /* 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(_PCMCIA1IO), + .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 |
