diff options
Diffstat (limited to 'arch/arm/mach-ep93xx/core.c')
| -rw-r--r-- | arch/arm/mach-ep93xx/core.c | 400 |
1 files changed, 155 insertions, 245 deletions
diff --git a/arch/arm/mach-ep93xx/core.c b/arch/arm/mach-ep93xx/core.c index 1f0d66561bb..9092677f63e 100644 --- a/arch/arm/mach-ep93xx/core.c +++ b/arch/arm/mach-ep93xx/core.c @@ -14,12 +14,15 @@ * your option) any later version. */ +#define pr_fmt(fmt) "ep93xx " KBUILD_MODNAME ": " fmt + #include <linux/kernel.h> #include <linux/init.h> #include <linux/platform_device.h> #include <linux/interrupt.h> #include <linux/dma-mapping.h> #include <linux/timex.h> +#include <linux/irq.h> #include <linux/io.h> #include <linux/gpio.h> #include <linux/leds.h> @@ -28,14 +31,15 @@ #include <linux/amba/serial.h> #include <linux/i2c.h> #include <linux/i2c-gpio.h> +#include <linux/spi/spi.h> #include <mach/hardware.h> #include <mach/fb.h> #include <mach/ep93xx_keypad.h> +#include <mach/ep93xx_spi.h> #include <asm/mach/map.h> #include <asm/mach/time.h> -#include <asm/mach/irq.h> #include <asm/hardware/vic.h> @@ -82,13 +86,40 @@ void __init ep93xx_map_io(void) * to use this timer for something else. We also use timer 4 for keeping * track of lost jiffies. */ -static unsigned int last_jiffy_time; - +#define EP93XX_TIMER_REG(x) (EP93XX_TIMER_BASE + (x)) +#define EP93XX_TIMER1_LOAD EP93XX_TIMER_REG(0x00) +#define EP93XX_TIMER1_VALUE EP93XX_TIMER_REG(0x04) +#define EP93XX_TIMER1_CONTROL EP93XX_TIMER_REG(0x08) +#define EP93XX_TIMER123_CONTROL_ENABLE (1 << 7) +#define EP93XX_TIMER123_CONTROL_MODE (1 << 6) +#define EP93XX_TIMER123_CONTROL_CLKSEL (1 << 3) +#define EP93XX_TIMER1_CLEAR EP93XX_TIMER_REG(0x0c) +#define EP93XX_TIMER2_LOAD EP93XX_TIMER_REG(0x20) +#define EP93XX_TIMER2_VALUE EP93XX_TIMER_REG(0x24) +#define EP93XX_TIMER2_CONTROL EP93XX_TIMER_REG(0x28) +#define EP93XX_TIMER2_CLEAR EP93XX_TIMER_REG(0x2c) +#define EP93XX_TIMER4_VALUE_LOW EP93XX_TIMER_REG(0x60) +#define EP93XX_TIMER4_VALUE_HIGH EP93XX_TIMER_REG(0x64) +#define EP93XX_TIMER4_VALUE_HIGH_ENABLE (1 << 8) +#define EP93XX_TIMER3_LOAD EP93XX_TIMER_REG(0x80) +#define EP93XX_TIMER3_VALUE EP93XX_TIMER_REG(0x84) +#define EP93XX_TIMER3_CONTROL EP93XX_TIMER_REG(0x88) +#define EP93XX_TIMER3_CLEAR EP93XX_TIMER_REG(0x8c) + +#define EP93XX_TIMER123_CLOCK 508469 +#define EP93XX_TIMER4_CLOCK 983040 + +#define TIMER1_RELOAD ((EP93XX_TIMER123_CLOCK / HZ) - 1) #define TIMER4_TICKS_PER_JIFFY DIV_ROUND_CLOSEST(CLOCK_TICK_RATE, HZ) +static unsigned int last_jiffy_time; + static irqreturn_t ep93xx_timer_interrupt(int irq, void *dev_id) { + /* Writing any value clears the timer interrupt */ __raw_writel(1, EP93XX_TIMER1_CLEAR); + + /* Recover lost jiffies */ while ((signed long) (__raw_readl(EP93XX_TIMER4_VALUE_LOW) - last_jiffy_time) >= TIMER4_TICKS_PER_JIFFY) { @@ -107,13 +138,18 @@ static struct irqaction ep93xx_timer_irq = { static void __init ep93xx_timer_init(void) { + u32 tmode = EP93XX_TIMER123_CONTROL_MODE | + EP93XX_TIMER123_CONTROL_CLKSEL; + /* Enable periodic HZ timer. */ - __raw_writel(0x48, EP93XX_TIMER1_CONTROL); - __raw_writel((508469 / HZ) - 1, EP93XX_TIMER1_LOAD); - __raw_writel(0xc8, EP93XX_TIMER1_CONTROL); + __raw_writel(tmode, EP93XX_TIMER1_CONTROL); + __raw_writel(TIMER1_RELOAD, EP93XX_TIMER1_LOAD); + __raw_writel(tmode | EP93XX_TIMER123_CONTROL_ENABLE, + EP93XX_TIMER1_CONTROL); /* Enable lost jiffy timer. */ - __raw_writel(0x100, EP93XX_TIMER4_VALUE_HIGH); + __raw_writel(EP93XX_TIMER4_VALUE_HIGH_ENABLE, + EP93XX_TIMER4_VALUE_HIGH); setup_irq(IRQ_EP93XX_TIMER1, &ep93xx_timer_irq); } @@ -135,237 +171,16 @@ struct sys_timer ep93xx_timer = { /************************************************************************* - * GPIO handling for EP93xx - *************************************************************************/ -static unsigned char gpio_int_unmasked[3]; -static unsigned char gpio_int_enabled[3]; -static unsigned char gpio_int_type1[3]; -static unsigned char gpio_int_type2[3]; -static unsigned char gpio_int_debounce[3]; - -/* Port ordering is: A B F */ -static const u8 int_type1_register_offset[3] = { 0x90, 0xac, 0x4c }; -static const u8 int_type2_register_offset[3] = { 0x94, 0xb0, 0x50 }; -static const u8 eoi_register_offset[3] = { 0x98, 0xb4, 0x54 }; -static const u8 int_en_register_offset[3] = { 0x9c, 0xb8, 0x58 }; -static const u8 int_debounce_register_offset[3] = { 0xa8, 0xc4, 0x64 }; - -void ep93xx_gpio_update_int_params(unsigned port) -{ - BUG_ON(port > 2); - - __raw_writeb(0, EP93XX_GPIO_REG(int_en_register_offset[port])); - - __raw_writeb(gpio_int_type2[port], - EP93XX_GPIO_REG(int_type2_register_offset[port])); - - __raw_writeb(gpio_int_type1[port], - EP93XX_GPIO_REG(int_type1_register_offset[port])); - - __raw_writeb(gpio_int_unmasked[port] & gpio_int_enabled[port], - EP93XX_GPIO_REG(int_en_register_offset[port])); -} - -void ep93xx_gpio_int_mask(unsigned line) -{ - gpio_int_unmasked[line >> 3] &= ~(1 << (line & 7)); -} - -void ep93xx_gpio_int_debounce(unsigned int irq, int enable) -{ - int line = irq_to_gpio(irq); - int port = line >> 3; - int port_mask = 1 << (line & 7); - - if (enable) - gpio_int_debounce[port] |= port_mask; - else - gpio_int_debounce[port] &= ~port_mask; - - __raw_writeb(gpio_int_debounce[port], - EP93XX_GPIO_REG(int_debounce_register_offset[port])); -} -EXPORT_SYMBOL(ep93xx_gpio_int_debounce); - -/************************************************************************* * EP93xx IRQ handling *************************************************************************/ -static void ep93xx_gpio_ab_irq_handler(unsigned int irq, struct irq_desc *desc) -{ - unsigned char status; - int i; - - status = __raw_readb(EP93XX_GPIO_A_INT_STATUS); - for (i = 0; i < 8; i++) { - if (status & (1 << i)) { - int gpio_irq = gpio_to_irq(EP93XX_GPIO_LINE_A(0)) + i; - generic_handle_irq(gpio_irq); - } - } - - status = __raw_readb(EP93XX_GPIO_B_INT_STATUS); - for (i = 0; i < 8; i++) { - if (status & (1 << i)) { - int gpio_irq = gpio_to_irq(EP93XX_GPIO_LINE_B(0)) + i; - generic_handle_irq(gpio_irq); - } - } -} - -static void ep93xx_gpio_f_irq_handler(unsigned int irq, struct irq_desc *desc) -{ - /* - * map discontiguous hw irq range to continous sw irq range: - * - * IRQ_EP93XX_GPIO{0..7}MUX -> gpio_to_irq(EP93XX_GPIO_LINE_F({0..7}) - */ - int port_f_idx = ((irq + 1) & 7) ^ 4; /* {19..22,47..50} -> {0..7} */ - int gpio_irq = gpio_to_irq(EP93XX_GPIO_LINE_F(0)) + port_f_idx; - - generic_handle_irq(gpio_irq); -} - -static void ep93xx_gpio_irq_ack(unsigned int irq) -{ - int line = irq_to_gpio(irq); - int port = line >> 3; - int port_mask = 1 << (line & 7); - - if ((irq_desc[irq].status & IRQ_TYPE_SENSE_MASK) == IRQ_TYPE_EDGE_BOTH) { - gpio_int_type2[port] ^= port_mask; /* switch edge direction */ - ep93xx_gpio_update_int_params(port); - } - - __raw_writeb(port_mask, EP93XX_GPIO_REG(eoi_register_offset[port])); -} - -static void ep93xx_gpio_irq_mask_ack(unsigned int irq) -{ - int line = irq_to_gpio(irq); - int port = line >> 3; - int port_mask = 1 << (line & 7); - - if ((irq_desc[irq].status & IRQ_TYPE_SENSE_MASK) == IRQ_TYPE_EDGE_BOTH) - gpio_int_type2[port] ^= port_mask; /* switch edge direction */ - - gpio_int_unmasked[port] &= ~port_mask; - ep93xx_gpio_update_int_params(port); - - __raw_writeb(port_mask, EP93XX_GPIO_REG(eoi_register_offset[port])); -} - -static void ep93xx_gpio_irq_mask(unsigned int irq) -{ - int line = irq_to_gpio(irq); - int port = line >> 3; - - gpio_int_unmasked[port] &= ~(1 << (line & 7)); - ep93xx_gpio_update_int_params(port); -} - -static void ep93xx_gpio_irq_unmask(unsigned int irq) -{ - int line = irq_to_gpio(irq); - int port = line >> 3; - - gpio_int_unmasked[port] |= 1 << (line & 7); - ep93xx_gpio_update_int_params(port); -} - - -/* - * gpio_int_type1 controls whether the interrupt is level (0) or - * edge (1) triggered, while gpio_int_type2 controls whether it - * triggers on low/falling (0) or high/rising (1). - */ -static int ep93xx_gpio_irq_type(unsigned int irq, unsigned int type) -{ - struct irq_desc *desc = irq_desc + irq; - const int gpio = irq_to_gpio(irq); - const int port = gpio >> 3; - const int port_mask = 1 << (gpio & 7); - - gpio_direction_input(gpio); - - switch (type) { - case IRQ_TYPE_EDGE_RISING: - gpio_int_type1[port] |= port_mask; - gpio_int_type2[port] |= port_mask; - desc->handle_irq = handle_edge_irq; - break; - case IRQ_TYPE_EDGE_FALLING: - gpio_int_type1[port] |= port_mask; - gpio_int_type2[port] &= ~port_mask; - desc->handle_irq = handle_edge_irq; - break; - case IRQ_TYPE_LEVEL_HIGH: - gpio_int_type1[port] &= ~port_mask; - gpio_int_type2[port] |= port_mask; - desc->handle_irq = handle_level_irq; - break; - case IRQ_TYPE_LEVEL_LOW: - gpio_int_type1[port] &= ~port_mask; - gpio_int_type2[port] &= ~port_mask; - desc->handle_irq = handle_level_irq; - break; - case IRQ_TYPE_EDGE_BOTH: - gpio_int_type1[port] |= port_mask; - /* set initial polarity based on current input level */ - if (gpio_get_value(gpio)) - gpio_int_type2[port] &= ~port_mask; /* falling */ - else - gpio_int_type2[port] |= port_mask; /* rising */ - desc->handle_irq = handle_edge_irq; - break; - default: - pr_err("ep93xx: failed to set irq type %d for gpio %d\n", - type, gpio); - return -EINVAL; - } - - gpio_int_enabled[port] |= port_mask; - - desc->status &= ~IRQ_TYPE_SENSE_MASK; - desc->status |= type & IRQ_TYPE_SENSE_MASK; - - ep93xx_gpio_update_int_params(port); - - return 0; -} - -static struct irq_chip ep93xx_gpio_irq_chip = { - .name = "GPIO", - .ack = ep93xx_gpio_irq_ack, - .mask_ack = ep93xx_gpio_irq_mask_ack, - .mask = ep93xx_gpio_irq_mask, - .unmask = ep93xx_gpio_irq_unmask, - .set_type = ep93xx_gpio_irq_type, -}; - +extern void ep93xx_gpio_init_irq(void); void __init ep93xx_init_irq(void) { - int gpio_irq; - vic_init(EP93XX_VIC1_BASE, 0, EP93XX_VIC1_VALID_IRQ_MASK, 0); vic_init(EP93XX_VIC2_BASE, 32, EP93XX_VIC2_VALID_IRQ_MASK, 0); - for (gpio_irq = gpio_to_irq(0); - gpio_irq <= gpio_to_irq(EP93XX_GPIO_LINE_MAX_IRQ); ++gpio_irq) { - set_irq_chip(gpio_irq, &ep93xx_gpio_irq_chip); - set_irq_handler(gpio_irq, handle_level_irq); - set_irq_flags(gpio_irq, IRQF_VALID); - } - - set_irq_chained_handler(IRQ_EP93XX_GPIO_AB, ep93xx_gpio_ab_irq_handler); - set_irq_chained_handler(IRQ_EP93XX_GPIO0MUX, ep93xx_gpio_f_irq_handler); - set_irq_chained_handler(IRQ_EP93XX_GPIO1MUX, ep93xx_gpio_f_irq_handler); - set_irq_chained_handler(IRQ_EP93XX_GPIO2MUX, ep93xx_gpio_f_irq_handler); - set_irq_chained_handler(IRQ_EP93XX_GPIO3MUX, ep93xx_gpio_f_irq_handler); - set_irq_chained_handler(IRQ_EP93XX_GPIO4MUX, ep93xx_gpio_f_irq_handler); - set_irq_chained_handler(IRQ_EP93XX_GPIO5MUX, ep93xx_gpio_f_irq_handler); - set_irq_chained_handler(IRQ_EP93XX_GPIO6MUX, ep93xx_gpio_f_irq_handler); - set_irq_chained_handler(IRQ_EP93XX_GPIO7MUX, ep93xx_gpio_f_irq_handler); + ep93xx_gpio_init_irq(); } @@ -409,6 +224,20 @@ void ep93xx_devcfg_set_clear(unsigned int set_bits, unsigned int clear_bits) } EXPORT_SYMBOL(ep93xx_devcfg_set_clear); +/** + * ep93xx_chip_revision() - returns the EP93xx chip revision + * + * See <mach/platform.h> for more information. + */ +unsigned int ep93xx_chip_revision(void) +{ + unsigned int v; + + v = __raw_readl(EP93XX_SYSCON_SYSCFG); + v &= EP93XX_SYSCON_SYSCFG_REV_MASK; + v >>= EP93XX_SYSCON_SYSCFG_REV_SHIFT; + return v; +} /************************************************************************* * EP93xx peripheral handling @@ -517,6 +346,10 @@ static struct platform_device ep93xx_ohci_device = { .resource = ep93xx_ohci_resources, }; + +/************************************************************************* + * EP93xx ethernet peripheral handling + *************************************************************************/ static struct ep93xx_eth_data ep93xx_eth_data; static struct resource ep93xx_eth_resource[] = { @@ -541,6 +374,12 @@ static struct platform_device ep93xx_eth_device = { .resource = ep93xx_eth_resource, }; +/** + * ep93xx_register_eth - Register the built-in ethernet platform device. + * @data: platform specific ethernet configuration (__initdata) + * @copy_addr: flag indicating that the MAC address should be copied + * from the IndAd registers (as programmed by the bootloader) + */ void __init ep93xx_register_eth(struct ep93xx_eth_data *data, int copy_addr) { if (copy_addr) @@ -557,11 +396,19 @@ void __init ep93xx_register_eth(struct ep93xx_eth_data *data, int copy_addr) static struct i2c_gpio_platform_data ep93xx_i2c_data; static struct platform_device ep93xx_i2c_device = { - .name = "i2c-gpio", - .id = 0, - .dev.platform_data = &ep93xx_i2c_data, + .name = "i2c-gpio", + .id = 0, + .dev = { + .platform_data = &ep93xx_i2c_data, + }, }; +/** + * ep93xx_register_i2c - Register the i2c platform device. + * @data: platform specific i2c-gpio configuration (__initdata) + * @devices: platform specific i2c bus device information (__initdata) + * @num: the number of devices on the i2c bus + */ void __init ep93xx_register_i2c(struct i2c_gpio_platform_data *data, struct i2c_board_info *devices, int num) { @@ -572,9 +419,9 @@ void __init ep93xx_register_i2c(struct i2c_gpio_platform_data *data, * CMOS driver. */ if (data->sda_is_open_drain && data->sda_pin != EP93XX_GPIO_LINE_EEDAT) - pr_warning("ep93xx: sda != EEDAT, open drain has no effect\n"); + pr_warning("sda != EEDAT, open drain has no effect\n"); if (data->scl_is_open_drain && data->scl_pin != EP93XX_GPIO_LINE_EECLK) - pr_warning("ep93xx: scl != EECLK, open drain has no effect\n"); + pr_warning("scl != EECLK, open drain has no effect\n"); __raw_writel((data->sda_is_open_drain << 1) | (data->scl_is_open_drain << 0), @@ -585,17 +432,67 @@ void __init ep93xx_register_i2c(struct i2c_gpio_platform_data *data, platform_device_register(&ep93xx_i2c_device); } +/************************************************************************* + * EP93xx SPI peripheral handling + *************************************************************************/ +static struct ep93xx_spi_info ep93xx_spi_master_data; + +static struct resource ep93xx_spi_resources[] = { + { + .start = EP93XX_SPI_PHYS_BASE, + .end = EP93XX_SPI_PHYS_BASE + 0x18 - 1, + .flags = IORESOURCE_MEM, + }, + { + .start = IRQ_EP93XX_SSP, + .end = IRQ_EP93XX_SSP, + .flags = IORESOURCE_IRQ, + }, +}; + +static struct platform_device ep93xx_spi_device = { + .name = "ep93xx-spi", + .id = 0, + .dev = { + .platform_data = &ep93xx_spi_master_data, + }, + .num_resources = ARRAY_SIZE(ep93xx_spi_resources), + .resource = ep93xx_spi_resources, +}; + +/** + * ep93xx_register_spi() - registers spi platform device + * @info: ep93xx board specific spi master info (__initdata) + * @devices: SPI devices to register (__initdata) + * @num: number of SPI devices to register + * + * This function registers platform device for the EP93xx SPI controller and + * also makes sure that SPI pins are muxed so that I2S is not using those pins. + */ +void __init ep93xx_register_spi(struct ep93xx_spi_info *info, + struct spi_board_info *devices, int num) +{ + /* + * When SPI is used, we need to make sure that I2S is muxed off from + * SPI pins. + */ + ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_I2SONSSP); + + ep93xx_spi_master_data = *info; + spi_register_board_info(devices, num); + platform_device_register(&ep93xx_spi_device); +} /************************************************************************* * EP93xx LEDs *************************************************************************/ static struct gpio_led ep93xx_led_pins[] = { { - .name = "platform:grled", - .gpio = EP93XX_GPIO_LINE_GRLED, + .name = "platform:grled", + .gpio = EP93XX_GPIO_LINE_GRLED, }, { - .name = "platform:rdled", - .gpio = EP93XX_GPIO_LINE_RDLED, + .name = "platform:rdled", + .gpio = EP93XX_GPIO_LINE_RDLED, }, }; @@ -715,7 +612,7 @@ static struct platform_device ep93xx_fb_device = { .name = "ep93xx-fb", .id = -1, .dev = { - .platform_data = &ep93xxfb_data, + .platform_data = &ep93xxfb_data, .coherent_dma_mask = DMA_BIT_MASK(32), .dma_mask = &ep93xx_fb_device.dev.coherent_dma_mask, }, @@ -723,6 +620,10 @@ static struct platform_device ep93xx_fb_device = { .resource = ep93xx_fb_resource, }; +/** + * ep93xx_register_fb - Register the framebuffer platform device. + * @data: platform specific framebuffer configuration (__initdata) + */ void __init ep93xx_register_fb(struct ep93xxfb_mach_info *data) { ep93xxfb_data = *data; @@ -733,6 +634,8 @@ void __init ep93xx_register_fb(struct ep93xxfb_mach_info *data) /************************************************************************* * EP93xx matrix keypad peripheral handling *************************************************************************/ +static struct ep93xx_keypad_platform_data ep93xx_keypad_data; + static struct resource ep93xx_keypad_resource[] = { { .start = EP93XX_KEY_MATRIX_PHYS_BASE, @@ -746,15 +649,22 @@ static struct resource ep93xx_keypad_resource[] = { }; static struct platform_device ep93xx_keypad_device = { - .name = "ep93xx-keypad", - .id = -1, - .num_resources = ARRAY_SIZE(ep93xx_keypad_resource), - .resource = ep93xx_keypad_resource, + .name = "ep93xx-keypad", + .id = -1, + .dev = { + .platform_data = &ep93xx_keypad_data, + }, + .num_resources = ARRAY_SIZE(ep93xx_keypad_resource), + .resource = ep93xx_keypad_resource, }; +/** + * ep93xx_register_keypad - Register the keypad platform device. + * @data: platform specific keypad configuration (__initdata) + */ void __init ep93xx_register_keypad(struct ep93xx_keypad_platform_data *data) { - ep93xx_keypad_device.dev.platform_data = data; + ep93xx_keypad_data = *data; platform_device_register(&ep93xx_keypad_device); } |