diff options
Diffstat (limited to 'drivers/mfd/asic3.c')
| -rw-r--r-- | drivers/mfd/asic3.c | 1082 |
1 files changed, 1082 insertions, 0 deletions
diff --git a/drivers/mfd/asic3.c b/drivers/mfd/asic3.c new file mode 100644 index 000000000..977bd3a3e --- /dev/null +++ b/drivers/mfd/asic3.c @@ -0,0 +1,1082 @@ +/* + * driver/mfd/asic3.c + * + * Compaq ASIC3 support. + * + * 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. + * + * Copyright 2001 Compaq Computer Corporation. + * Copyright 2004-2005 Phil Blundell + * Copyright 2007-2008 OpenedHand Ltd. + * + * Authors: Phil Blundell <pb@handhelds.org>, + * Samuel Ortiz <sameo@openedhand.com> + * + */ + +#include <linux/kernel.h> +#include <linux/delay.h> +#include <linux/irq.h> +#include <linux/gpio.h> +#include <linux/export.h> +#include <linux/io.h> +#include <linux/slab.h> +#include <linux/spinlock.h> +#include <linux/platform_device.h> + +#include <linux/mfd/asic3.h> +#include <linux/mfd/core.h> +#include <linux/mfd/ds1wm.h> +#include <linux/mfd/tmio.h> + +enum { + ASIC3_CLOCK_SPI, + ASIC3_CLOCK_OWM, + ASIC3_CLOCK_PWM0, + ASIC3_CLOCK_PWM1, + ASIC3_CLOCK_LED0, + ASIC3_CLOCK_LED1, + ASIC3_CLOCK_LED2, + ASIC3_CLOCK_SD_HOST, + ASIC3_CLOCK_SD_BUS, + ASIC3_CLOCK_SMBUS, + ASIC3_CLOCK_EX0, + ASIC3_CLOCK_EX1, +}; + +struct asic3_clk { + int enabled; + unsigned int cdex; + unsigned long rate; +}; + +#define INIT_CDEX(_name, _rate) \ + [ASIC3_CLOCK_##_name] = { \ + .cdex = CLOCK_CDEX_##_name, \ + .rate = _rate, \ + } + +static struct asic3_clk asic3_clk_init[] __initdata = { + INIT_CDEX(SPI, 0), + INIT_CDEX(OWM, 5000000), + INIT_CDEX(PWM0, 0), + INIT_CDEX(PWM1, 0), + INIT_CDEX(LED0, 0), + INIT_CDEX(LED1, 0), + INIT_CDEX(LED2, 0), + INIT_CDEX(SD_HOST, 24576000), + INIT_CDEX(SD_BUS, 12288000), + INIT_CDEX(SMBUS, 0), + INIT_CDEX(EX0, 32768), + INIT_CDEX(EX1, 24576000), +}; + +struct asic3 { + void __iomem *mapping; + unsigned int bus_shift; + unsigned int irq_nr; + unsigned int irq_base; + spinlock_t lock; + u16 irq_bothedge[4]; + struct gpio_chip gpio; + struct device *dev; + void __iomem *tmio_cnf; + + struct asic3_clk clocks[ARRAY_SIZE(asic3_clk_init)]; +}; + +static int asic3_gpio_get(struct gpio_chip *chip, unsigned offset); + +void asic3_write_register(struct asic3 *asic, unsigned int reg, u32 value) +{ + iowrite16(value, asic->mapping + + (reg >> asic->bus_shift)); +} +EXPORT_SYMBOL_GPL(asic3_write_register); + +u32 asic3_read_register(struct asic3 *asic, unsigned int reg) +{ + return ioread16(asic->mapping + + (reg >> asic->bus_shift)); +} +EXPORT_SYMBOL_GPL(asic3_read_register); + +static void asic3_set_register(struct asic3 *asic, u32 reg, u32 bits, bool set) +{ + unsigned long flags; + u32 val; + + spin_lock_irqsave(&asic->lock, flags); + val = asic3_read_register(asic, reg); + if (set) + val |= bits; + else + val &= ~bits; + asic3_write_register(asic, reg, val); + spin_unlock_irqrestore(&asic->lock, flags); +} + +/* IRQs */ +#define MAX_ASIC_ISR_LOOPS 20 +#define ASIC3_GPIO_BASE_INCR \ + (ASIC3_GPIO_B_BASE - ASIC3_GPIO_A_BASE) + +static void asic3_irq_flip_edge(struct asic3 *asic, + u32 base, int bit) +{ + u16 edge; + unsigned long flags; + + spin_lock_irqsave(&asic->lock, flags); + edge = asic3_read_register(asic, + base + ASIC3_GPIO_EDGE_TRIGGER); + edge ^= bit; + asic3_write_register(asic, + base + ASIC3_GPIO_EDGE_TRIGGER, edge); + spin_unlock_irqrestore(&asic->lock, flags); +} + +static void asic3_irq_demux(unsigned int irq, struct irq_desc *desc) +{ + struct asic3 *asic = irq_desc_get_handler_data(desc); + struct irq_data *data = irq_desc_get_irq_data(desc); + int iter, i; + unsigned long flags; + + data->chip->irq_ack(data); + + for (iter = 0 ; iter < MAX_ASIC_ISR_LOOPS; iter++) { + u32 status; + int bank; + + spin_lock_irqsave(&asic->lock, flags); + status = asic3_read_register(asic, + ASIC3_OFFSET(INTR, P_INT_STAT)); + spin_unlock_irqrestore(&asic->lock, flags); + + /* Check all ten register bits */ + if ((status & 0x3ff) == 0) + break; + + /* Handle GPIO IRQs */ + for (bank = 0; bank < ASIC3_NUM_GPIO_BANKS; bank++) { + if (status & (1 << bank)) { + unsigned long base, istat; + + base = ASIC3_GPIO_A_BASE + + bank * ASIC3_GPIO_BASE_INCR; + + spin_lock_irqsave(&asic->lock, flags); + istat = asic3_read_register(asic, + base + + ASIC3_GPIO_INT_STATUS); + /* Clearing IntStatus */ + asic3_write_register(asic, + base + + ASIC3_GPIO_INT_STATUS, 0); + spin_unlock_irqrestore(&asic->lock, flags); + + for (i = 0; i < ASIC3_GPIOS_PER_BANK; i++) { + int bit = (1 << i); + unsigned int irqnr; + + if (!(istat & bit)) + continue; + + irqnr = asic->irq_base + + (ASIC3_GPIOS_PER_BANK * bank) + + i; + generic_handle_irq(irqnr); + if (asic->irq_bothedge[bank] & bit) + asic3_irq_flip_edge(asic, base, + bit); + } + } + } + + /* Handle remaining IRQs in the status register */ + for (i = ASIC3_NUM_GPIOS; i < ASIC3_NR_IRQS; i++) { + /* They start at bit 4 and go up */ + if (status & (1 << (i - ASIC3_NUM_GPIOS + 4))) + generic_handle_irq(asic->irq_base + i); + } + } + + if (iter >= MAX_ASIC_ISR_LOOPS) + dev_err(asic->dev, "interrupt processing overrun\n"); +} + +static inline int asic3_irq_to_bank(struct asic3 *asic, int irq) +{ + int n; + + n = (irq - asic->irq_base) >> 4; + + return (n * (ASIC3_GPIO_B_BASE - ASIC3_GPIO_A_BASE)); +} + +static inline int asic3_irq_to_index(struct asic3 *asic, int irq) +{ + return (irq - asic->irq_base) & 0xf; +} + +static void asic3_mask_gpio_irq(struct irq_data *data) +{ + struct asic3 *asic = irq_data_get_irq_chip_data(data); + u32 val, bank, index; + unsigned long flags; + + bank = asic3_irq_to_bank(asic, data->irq); + index = asic3_irq_to_index(asic, data->irq); + + spin_lock_irqsave(&asic->lock, flags); + val = asic3_read_register(asic, bank + ASIC3_GPIO_MASK); + val |= 1 << index; + asic3_write_register(asic, bank + ASIC3_GPIO_MASK, val); + spin_unlock_irqrestore(&asic->lock, flags); +} + +static void asic3_mask_irq(struct irq_data *data) +{ + struct asic3 *asic = irq_data_get_irq_chip_data(data); + int regval; + unsigned long flags; + + spin_lock_irqsave(&asic->lock, flags); + regval = asic3_read_register(asic, + ASIC3_INTR_BASE + + ASIC3_INTR_INT_MASK); + + regval &= ~(ASIC3_INTMASK_MASK0 << + (data->irq - (asic->irq_base + ASIC3_NUM_GPIOS))); + + asic3_write_register(asic, + ASIC3_INTR_BASE + + ASIC3_INTR_INT_MASK, + regval); + spin_unlock_irqrestore(&asic->lock, flags); +} + +static void asic3_unmask_gpio_irq(struct irq_data *data) +{ + struct asic3 *asic = irq_data_get_irq_chip_data(data); + u32 val, bank, index; + unsigned long flags; + + bank = asic3_irq_to_bank(asic, data->irq); + index = asic3_irq_to_index(asic, data->irq); + + spin_lock_irqsave(&asic->lock, flags); + val = asic3_read_register(asic, bank + ASIC3_GPIO_MASK); + val &= ~(1 << index); + asic3_write_register(asic, bank + ASIC3_GPIO_MASK, val); + spin_unlock_irqrestore(&asic->lock, flags); +} + +static void asic3_unmask_irq(struct irq_data *data) +{ + struct asic3 *asic = irq_data_get_irq_chip_data(data); + int regval; + unsigned long flags; + + spin_lock_irqsave(&asic->lock, flags); + regval = asic3_read_register(asic, + ASIC3_INTR_BASE + + ASIC3_INTR_INT_MASK); + + regval |= (ASIC3_INTMASK_MASK0 << + (data->irq - (asic->irq_base + ASIC3_NUM_GPIOS))); + + asic3_write_register(asic, + ASIC3_INTR_BASE + + ASIC3_INTR_INT_MASK, + regval); + spin_unlock_irqrestore(&asic->lock, flags); +} + +static int asic3_gpio_irq_type(struct irq_data *data, unsigned int type) +{ + struct asic3 *asic = irq_data_get_irq_chip_data(data); + u32 bank, index; + u16 trigger, level, edge, bit; + unsigned long flags; + + bank = asic3_irq_to_bank(asic, data->irq); + index = asic3_irq_to_index(asic, data->irq); + bit = 1<<index; + + spin_lock_irqsave(&asic->lock, flags); + level = asic3_read_register(asic, + bank + ASIC3_GPIO_LEVEL_TRIGGER); + edge = asic3_read_register(asic, + bank + ASIC3_GPIO_EDGE_TRIGGER); + trigger = asic3_read_register(asic, + bank + ASIC3_GPIO_TRIGGER_TYPE); + asic->irq_bothedge[(data->irq - asic->irq_base) >> 4] &= ~bit; + + if (type == IRQ_TYPE_EDGE_RISING) { + trigger |= bit; + edge |= bit; + } else if (type == IRQ_TYPE_EDGE_FALLING) { + trigger |= bit; + edge &= ~bit; + } else if (type == IRQ_TYPE_EDGE_BOTH) { + trigger |= bit; + if (asic3_gpio_get(&asic->gpio, data->irq - asic->irq_base)) + edge &= ~bit; + else + edge |= bit; + asic->irq_bothedge[(data->irq - asic->irq_base) >> 4] |= bit; + } else if (type == IRQ_TYPE_LEVEL_LOW) { + trigger &= ~bit; + level &= ~bit; + } else if (type == IRQ_TYPE_LEVEL_HIGH) { + trigger &= ~bit; + level |= bit; + } else { + /* + * if type == IRQ_TYPE_NONE, we should mask interrupts, but + * be careful to not unmask them if mask was also called. + * Probably need internal state for mask. + */ + dev_notice(asic->dev, "irq type not changed\n"); + } + asic3_write_register(asic, bank + ASIC3_GPIO_LEVEL_TRIGGER, + level); + asic3_write_register(asic, bank + ASIC3_GPIO_EDGE_TRIGGER, + edge); + asic3_write_register(asic, bank + ASIC3_GPIO_TRIGGER_TYPE, + trigger); + spin_unlock_irqrestore(&asic->lock, flags); + return 0; +} + +static int asic3_gpio_irq_set_wake(struct irq_data *data, unsigned int on) +{ + struct asic3 *asic = irq_data_get_irq_chip_data(data); + u32 bank, index; + u16 bit; + + bank = asic3_irq_to_bank(asic, data->irq); + index = asic3_irq_to_index(asic, data->irq); + bit = 1<<index; + + asic3_set_register(asic, bank + ASIC3_GPIO_SLEEP_MASK, bit, !on); + + return 0; +} + +static struct irq_chip asic3_gpio_irq_chip = { + .name = "ASIC3-GPIO", + .irq_ack = asic3_mask_gpio_irq, + .irq_mask = asic3_mask_gpio_irq, + .irq_unmask = asic3_unmask_gpio_irq, + .irq_set_type = asic3_gpio_irq_type, + .irq_set_wake = asic3_gpio_irq_set_wake, +}; + +static struct irq_chip asic3_irq_chip = { + .name = "ASIC3", + .irq_ack = asic3_mask_irq, + .irq_mask = asic3_mask_irq, + .irq_unmask = asic3_unmask_irq, +}; + +static int __init asic3_irq_probe(struct platform_device *pdev) +{ + struct asic3 *asic = platform_get_drvdata(pdev); + unsigned long clksel = 0; + unsigned int irq, irq_base; + int ret; + + ret = platform_get_irq(pdev, 0); + if (ret < 0) + return ret; + asic->irq_nr = ret; + + /* turn on clock to IRQ controller */ + clksel |= CLOCK_SEL_CX; + asic3_write_register(asic, ASIC3_OFFSET(CLOCK, SEL), + clksel); + + irq_base = asic->irq_base; + + for (irq = irq_base; irq < irq_base + ASIC3_NR_IRQS; irq++) { + if (irq < asic->irq_base + ASIC3_NUM_GPIOS) + irq_set_chip(irq, &asic3_gpio_irq_chip); + else + irq_set_chip(irq, &asic3_irq_chip); + + irq_set_chip_data(irq, asic); + irq_set_handler(irq, handle_level_irq); + set_irq_flags(irq, IRQF_VALID | IRQF_PROBE); + } + + asic3_write_register(asic, ASIC3_OFFSET(INTR, INT_MASK), + ASIC3_INTMASK_GINTMASK); + + irq_set_chained_handler(asic->irq_nr, asic3_irq_demux); + irq_set_irq_type(asic->irq_nr, IRQ_TYPE_EDGE_RISING); + irq_set_handler_data(asic->irq_nr, asic); + + return 0; +} + +static void asic3_irq_remove(struct platform_device *pdev) +{ + struct asic3 *asic = platform_get_drvdata(pdev); + unsigned int irq, irq_base; + + irq_base = asic->irq_base; + + for (irq = irq_base; irq < irq_base + ASIC3_NR_IRQS; irq++) { + set_irq_flags(irq, 0); + irq_set_chip_and_handler(irq, NULL, NULL); + irq_set_chip_data(irq, NULL); + } + irq_set_chained_handler(asic->irq_nr, NULL); +} + +/* GPIOs */ +static int asic3_gpio_direction(struct gpio_chip *chip, + unsigned offset, int out) +{ + u32 mask = ASIC3_GPIO_TO_MASK(offset), out_reg; + unsigned int gpio_base; + unsigned long flags; + struct asic3 *asic; + + asic = container_of(chip, struct asic3, gpio); + gpio_base = ASIC3_GPIO_TO_BASE(offset); + + if (gpio_base > ASIC3_GPIO_D_BASE) { + dev_err(asic->dev, "Invalid base (0x%x) for gpio %d\n", + gpio_base, offset); + return -EINVAL; + } + + spin_lock_irqsave(&asic->lock, flags); + + out_reg = asic3_read_register(asic, gpio_base + ASIC3_GPIO_DIRECTION); + + /* Input is 0, Output is 1 */ + if (out) + out_reg |= mask; + else + out_reg &= ~mask; + + asic3_write_register(asic, gpio_base + ASIC3_GPIO_DIRECTION, out_reg); + + spin_unlock_irqrestore(&asic->lock, flags); + + return 0; + +} + +static int asic3_gpio_direction_input(struct gpio_chip *chip, + unsigned offset) +{ + return asic3_gpio_direction(chip, offset, 0); +} + +static int asic3_gpio_direction_output(struct gpio_chip *chip, + unsigned offset, int value) +{ + return asic3_gpio_direction(chip, offset, 1); +} + +static int asic3_gpio_get(struct gpio_chip *chip, + unsigned offset) +{ + unsigned int gpio_base; + u32 mask = ASIC3_GPIO_TO_MASK(offset); + struct asic3 *asic; + + asic = container_of(chip, struct asic3, gpio); + gpio_base = ASIC3_GPIO_TO_BASE(offset); + + if (gpio_base > ASIC3_GPIO_D_BASE) { + dev_err(asic->dev, "Invalid base (0x%x) for gpio %d\n", + gpio_base, offset); + return -EINVAL; + } + + return asic3_read_register(asic, gpio_base + ASIC3_GPIO_STATUS) & mask; +} + +static void asic3_gpio_set(struct gpio_chip *chip, + unsigned offset, int value) +{ + u32 mask, out_reg; + unsigned int gpio_base; + unsigned long flags; + struct asic3 *asic; + + asic = container_of(chip, struct asic3, gpio); + gpio_base = ASIC3_GPIO_TO_BASE(offset); + + if (gpio_base > ASIC3_GPIO_D_BASE) { + dev_err(asic->dev, "Invalid base (0x%x) for gpio %d\n", + gpio_base, offset); + return; + } + + mask = ASIC3_GPIO_TO_MASK(offset); + + spin_lock_irqsave(&asic->lock, flags); + + out_reg = asic3_read_register(asic, gpio_base + ASIC3_GPIO_OUT); + + if (value) + out_reg |= mask; + else + out_reg &= ~mask; + + asic3_write_register(asic, gpio_base + ASIC3_GPIO_OUT, out_reg); + + spin_unlock_irqrestore(&asic->lock, flags); + + return; +} + +static int asic3_gpio_to_irq(struct gpio_chip *chip, unsigned offset) +{ + struct asic3 *asic = container_of(chip, struct asic3, gpio); + + return asic->irq_base + offset; +} + +static __init int asic3_gpio_probe(struct platform_device *pdev, + u16 *gpio_config, int num) +{ + struct asic3 *asic = platform_get_drvdata(pdev); + u16 alt_reg[ASIC3_NUM_GPIO_BANKS]; + u16 out_reg[ASIC3_NUM_GPIO_BANKS]; + u16 dir_reg[ASIC3_NUM_GPIO_BANKS]; + int i; + + memset(alt_reg, 0, ASIC3_NUM_GPIO_BANKS * sizeof(u16)); + memset(out_reg, 0, ASIC3_NUM_GPIO_BANKS * sizeof(u16)); + memset(dir_reg, 0, ASIC3_NUM_GPIO_BANKS * sizeof(u16)); + + /* Enable all GPIOs */ + asic3_write_register(asic, ASIC3_GPIO_OFFSET(A, MASK), 0xffff); + asic3_write_register(asic, ASIC3_GPIO_OFFSET(B, MASK), 0xffff); + asic3_write_register(asic, ASIC3_GPIO_OFFSET(C, MASK), 0xffff); + asic3_write_register(asic, ASIC3_GPIO_OFFSET(D, MASK), 0xffff); + + for (i = 0; i < num; i++) { + u8 alt, pin, dir, init, bank_num, bit_num; + u16 config = gpio_config[i]; + + pin = ASIC3_CONFIG_GPIO_PIN(config); + alt = ASIC3_CONFIG_GPIO_ALT(config); + dir = ASIC3_CONFIG_GPIO_DIR(config); + init = ASIC3_CONFIG_GPIO_INIT(config); + + bank_num = ASIC3_GPIO_TO_BANK(pin); + bit_num = ASIC3_GPIO_TO_BIT(pin); + + alt_reg[bank_num] |= (alt << bit_num); + out_reg[bank_num] |= (init << bit_num); + dir_reg[bank_num] |= (dir << bit_num); + } + + for (i = 0; i < ASIC3_NUM_GPIO_BANKS; i++) { + asic3_write_register(asic, + ASIC3_BANK_TO_BASE(i) + + ASIC3_GPIO_DIRECTION, + dir_reg[i]); + asic3_write_register(asic, + ASIC3_BANK_TO_BASE(i) + ASIC3_GPIO_OUT, + out_reg[i]); + asic3_write_register(asic, + ASIC3_BANK_TO_BASE(i) + + ASIC3_GPIO_ALT_FUNCTION, + alt_reg[i]); + } + + return gpiochip_add(&asic->gpio); +} + +static int asic3_gpio_remove(struct platform_device *pdev) +{ + struct asic3 *asic = platform_get_drvdata(pdev); + + gpiochip_remove(&asic->gpio); + return 0; +} + +static void asic3_clk_enable(struct asic3 *asic, struct asic3_clk *clk) +{ + unsigned long flags; + u32 cdex; + + spin_lock_irqsave(&asic->lock, flags); + if (clk->enabled++ == 0) { + cdex = asic3_read_register(asic, ASIC3_OFFSET(CLOCK, CDEX)); + cdex |= clk->cdex; + asic3_write_register(asic, ASIC3_OFFSET(CLOCK, CDEX), cdex); + } + spin_unlock_irqrestore(&asic->lock, flags); +} + +static void asic3_clk_disable(struct asic3 *asic, struct asic3_clk *clk) +{ + unsigned long flags; + u32 cdex; + + WARN_ON(clk->enabled == 0); + + spin_lock_irqsave(&asic->lock, flags); + if (--clk->enabled == 0) { + cdex = asic3_read_register(asic, ASIC3_OFFSET(CLOCK, CDEX)); + cdex &= ~clk->cdex; + asic3_write_register(asic, ASIC3_OFFSET(CLOCK, CDEX), cdex); + } + spin_unlock_irqrestore(&asic->lock, flags); +} + +/* MFD cells (SPI, PWM, LED, DS1WM, MMC) */ +static struct ds1wm_driver_data ds1wm_pdata = { + .active_high = 1, + .reset_recover_delay = 1, +}; + +static struct resource ds1wm_resources[] = { + { + .start = ASIC3_OWM_BASE, + .end = ASIC3_OWM_BASE + 0x13, + .flags = IORESOURCE_MEM, + }, + { + .start = ASIC3_IRQ_OWM, + .end = ASIC3_IRQ_OWM, + .flags = IORESOURCE_IRQ | IORESOURCE_IRQ_HIGHEDGE, + }, +}; + +static int ds1wm_enable(struct platform_device *pdev) +{ + struct asic3 *asic = dev_get_drvdata(pdev->dev.parent); + + /* Turn on external clocks and the OWM clock */ + asic3_clk_enable(asic, &asic->clocks[ASIC3_CLOCK_EX0]); + asic3_clk_enable(asic, &asic->clocks[ASIC3_CLOCK_EX1]); + asic3_clk_enable(asic, &asic->clocks[ASIC3_CLOCK_OWM]); + msleep(1); + + /* Reset and enable DS1WM */ + asic3_set_register(asic, ASIC3_OFFSET(EXTCF, RESET), + ASIC3_EXTCF_OWM_RESET, 1); + msleep(1); + asic3_set_register(asic, ASIC3_OFFSET(EXTCF, RESET), + ASIC3_EXTCF_OWM_RESET, 0); + msleep(1); + asic3_set_register(asic, ASIC3_OFFSET(EXTCF, SELECT), + ASIC3_EXTCF_OWM_EN, 1); + msleep(1); + + return 0; +} + +static int ds1wm_disable(struct platform_device *pdev) +{ + struct asic3 *asic = dev_get_drvdata(pdev->dev.parent); + + asic3_set_register(asic, ASIC3_OFFSET(EXTCF, SELECT), + ASIC3_EXTCF_OWM_EN, 0); + + asic3_clk_disable(asic, &asic->clocks[ASIC3_CLOCK_OWM]); + asic3_clk_disable(asic, &asic->clocks[ASIC3_CLOCK_EX0]); + asic3_clk_disable(asic, &asic->clocks[ASIC3_CLOCK_EX1]); + + return 0; +} + +static const struct mfd_cell asic3_cell_ds1wm = { + .name = "ds1wm", + .enable = ds1wm_enable, + .disable = ds1wm_disable, + .platform_data = &ds1wm_pdata, + .pdata_size = sizeof(ds1wm_pdata), + .num_resources = ARRAY_SIZE(ds1wm_resources), + .resources = ds1wm_resources, +}; + +static void asic3_mmc_pwr(struct platform_device *pdev, int state) +{ + struct asic3 *asic = dev_get_drvdata(pdev->dev.parent); + + tmio_core_mmc_pwr(asic->tmio_cnf, 1 - asic->bus_shift, state); +} + +static void asic3_mmc_clk_div(struct platform_device *pdev, int state) +{ + struct asic3 *asic = dev_get_drvdata(pdev->dev.parent); + + tmio_core_mmc_clk_div(asic->tmio_cnf, 1 - asic->bus_shift, state); +} + +static struct tmio_mmc_data asic3_mmc_data = { + .hclk = 24576000, + .set_pwr = asic3_mmc_pwr, + .set_clk_div = asic3_mmc_clk_div, +}; + +static struct resource asic3_mmc_resources[] = { + { + .start = ASIC3_SD_CTRL_BASE, + .end = ASIC3_SD_CTRL_BASE + 0x3ff, + .flags = IORESOURCE_MEM, + }, + { + .start = 0, + .end = 0, + .flags = IORESOURCE_IRQ, + }, +}; + +static int asic3_mmc_enable(struct platform_device *pdev) +{ + struct asic3 *asic = dev_get_drvdata(pdev->dev.parent); + + /* Not sure if it must be done bit by bit, but leaving as-is */ + asic3_set_register(asic, ASIC3_OFFSET(SDHWCTRL, SDCONF), + ASIC3_SDHWCTRL_LEVCD, 1); + asic3_set_register(asic, ASIC3_OFFSET(SDHWCTRL, SDCONF), + ASIC3_SDHWCTRL_LEVWP, 1); + asic3_set_register(asic, ASIC3_OFFSET(SDHWCTRL, SDCONF), + ASIC3_SDHWCTRL_SUSPEND, 0); + asic3_set_register(asic, ASIC3_OFFSET(SDHWCTRL, SDCONF), + ASIC3_SDHWCTRL_PCLR, 0); + + asic3_clk_enable(asic, &asic->clocks[ASIC3_CLOCK_EX0]); + /* CLK32 used for card detection and for interruption detection + * when HCLK is stopped. + */ + asic3_clk_enable(asic, &asic->clocks[ASIC3_CLOCK_EX1]); + msleep(1); + + /* HCLK 24.576 MHz, BCLK 12.288 MHz: */ + asic3_write_register(asic, ASIC3_OFFSET(CLOCK, SEL), + CLOCK_SEL_CX | CLOCK_SEL_SD_HCLK_SEL); + + asic3_clk_enable(asic, &asic->clocks[ASIC3_CLOCK_SD_HOST]); + asic3_clk_enable(asic, &asic->clocks[ASIC3_CLOCK_SD_BUS]); + msleep(1); + + asic3_set_register(asic, ASIC3_OFFSET(EXTCF, SELECT), + ASIC3_EXTCF_SD_MEM_ENABLE, 1); + + /* Enable SD card slot 3.3V power supply */ + asic3_set_register(asic, ASIC3_OFFSET(SDHWCTRL, SDCONF), + ASIC3_SDHWCTRL_SDPWR, 1); + + /* ASIC3_SD_CTRL_BASE assumes 32-bit addressing, TMIO is 16-bit */ + tmio_core_mmc_enable(asic->tmio_cnf, 1 - asic->bus_shift, + ASIC3_SD_CTRL_BASE >> 1); + + return 0; +} + +static int asic3_mmc_disable(struct platform_device *pdev) +{ + struct asic3 *asic = dev_get_drvdata(pdev->dev.parent); + + /* Put in suspend mode */ + asic3_set_register(asic, ASIC3_OFFSET(SDHWCTRL, SDCONF), + ASIC3_SDHWCTRL_SUSPEND, 1); + + /* Disable clocks */ + asic3_clk_disable(asic, &asic->clocks[ASIC3_CLOCK_SD_HOST]); + asic3_clk_disable(asic, &asic->clocks[ASIC3_CLOCK_SD_BUS]); + asic3_clk_disable(asic, &asic->clocks[ASIC3_CLOCK_EX0]); + asic3_clk_disable(asic, &asic->clocks[ASIC3_CLOCK_EX1]); + return 0; +} + +static const struct mfd_cell asic3_cell_mmc = { + .name = "tmio-mmc", + .enable = asic3_mmc_enable, + .disable = asic3_mmc_disable, + .suspend = asic3_mmc_disable, + .resume = asic3_mmc_enable, + .platform_data = &asic3_mmc_data, + .pdata_size = sizeof(asic3_mmc_data), + .num_resources = ARRAY_SIZE(asic3_mmc_resources), + .resources = asic3_mmc_resources, +}; + +static const int clock_ledn[ASIC3_NUM_LEDS] = { + [0] = ASIC3_CLOCK_LED0, + [1] = ASIC3_CLOCK_LED1, + [2] = ASIC3_CLOCK_LED2, +}; + +static int asic3_leds_enable(struct platform_device *pdev) +{ + const struct mfd_cell *cell = mfd_get_cell(pdev); + struct asic3 *asic = dev_get_drvdata(pdev->dev.parent); + + asic3_clk_enable(asic, &asic->clocks[clock_ledn[cell->id]]); + + return 0; +} + +static int asic3_leds_disable(struct platform_device *pdev) +{ + const struct mfd_cell *cell = mfd_get_cell(pdev); + struct asic3 *asic = dev_get_drvdata(pdev->dev.parent); + + asic3_clk_disable(asic, &asic->clocks[clock_ledn[cell->id]]); + + return 0; +} + +static int asic3_leds_suspend(struct platform_device *pdev) +{ + const struct mfd_cell *cell = mfd_get_cell(pdev); + struct asic3 *asic = dev_get_drvdata(pdev->dev.parent); + + while (asic3_gpio_get(&asic->gpio, ASIC3_GPIO(C, cell->id)) != 0) + msleep(1); + + asic3_clk_disable(asic, &asic->clocks[clock_ledn[cell->id]]); + + return 0; +} + +static struct mfd_cell asic3_cell_leds[ASIC3_NUM_LEDS] = { + [0] = { + .name = "leds-asic3", + .id = 0, + .enable = asic3_leds_enable, + .disable = asic3_leds_disable, + .suspend = asic3_leds_suspend, + .resume = asic3_leds_enable, + }, + [1] = { + .name = "leds-asic3", + .id = 1, + .enable = asic3_leds_enable, + .disable = asic3_leds_disable, + .suspend = asic3_leds_suspend, + .resume = asic3_leds_enable, + }, + [2] = { + .name = "leds-asic3", + .id = 2, + .enable = asic3_leds_enable, + .disable = asic3_leds_disable, + .suspend = asic3_leds_suspend, + .resume = asic3_leds_enable, + }, +}; + +static int __init asic3_mfd_probe(struct platform_device *pdev, + struct asic3_platform_data *pdata, + struct resource *mem) +{ + struct asic3 *asic = platform_get_drvdata(pdev); + struct resource *mem_sdio; + int irq, ret; + + mem_sdio = platform_get_resource(pdev, IORESOURCE_MEM, 1); + if (!mem_sdio) + dev_dbg(asic->dev, "no SDIO MEM resource\n"); + + irq = platform_get_irq(pdev, 1); + if (irq < 0) + dev_dbg(asic->dev, "no SDIO IRQ resource\n"); + + /* DS1WM */ + asic3_set_register(asic, ASIC3_OFFSET(EXTCF, SELECT), + ASIC3_EXTCF_OWM_SMB, 0); + + ds1wm_resources[0].start >>= asic->bus_shift; + ds1wm_resources[0].end >>= asic->bus_shift; + + /* MMC */ + if (mem_sdio) { + asic->tmio_cnf = ioremap((ASIC3_SD_CONFIG_BASE >> asic->bus_shift) + + mem_sdio->start, + ASIC3_SD_CONFIG_SIZE >> asic->bus_shift); + if (!asic->tmio_cnf) { + ret = -ENOMEM; + dev_dbg(asic->dev, "Couldn't ioremap SD_CONFIG\n"); + goto out; + } + } + asic3_mmc_resources[0].start >>= asic->bus_shift; + asic3_mmc_resources[0].end >>= asic->bus_shift; + + if (pdata->clock_rate) { + ds1wm_pdata.clock_rate = pdata->clock_rate; + ret = mfd_add_devices(&pdev->dev, pdev->id, + &asic3_cell_ds1wm, 1, mem, asic->irq_base, NULL); + if (ret < 0) + goto out; + } + + if (mem_sdio && (irq >= 0)) { + ret = mfd_add_devices(&pdev->dev, pdev->id, + &asic3_cell_mmc, 1, mem_sdio, irq, NULL); + if (ret < 0) + goto out; + } + + ret = 0; + if (pdata->leds) { + int i; + + for (i = 0; i < ASIC3_NUM_LEDS; ++i) { + asic3_cell_leds[i].platform_data = &pdata->leds[i]; + asic3_cell_leds[i].pdata_size = sizeof(pdata->leds[i]); + } + ret = mfd_add_devices(&pdev->dev, 0, + asic3_cell_leds, ASIC3_NUM_LEDS, NULL, 0, NULL); + } + + out: + return ret; +} + +static void asic3_mfd_remove(struct platform_device *pdev) +{ + struct asic3 *asic = platform_get_drvdata(pdev); + + mfd_remove_devices(&pdev->dev); + iounmap(asic->tmio_cnf); +} + +/* Core */ +static int __init asic3_probe(struct platform_device *pdev) +{ + struct asic3_platform_data *pdata = dev_get_platdata(&pdev->dev); + struct asic3 *asic; + struct resource *mem; + unsigned long clksel; + int ret = 0; + + asic = devm_kzalloc(&pdev->dev, + sizeof(struct asic3), GFP_KERNEL); + if (asic == NULL) { + printk(KERN_ERR "kzalloc failed\n"); + return -ENOMEM; + } + + spin_lock_init(&asic->lock); + platform_set_drvdata(pdev, asic); + asic->dev = &pdev->dev; + + mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!mem) { + dev_err(asic->dev, "no MEM resource\n"); + return -ENOMEM; + } + + asic->mapping = ioremap(mem->start, resource_size(mem)); + if (!asic->mapping) { + dev_err(asic->dev, "Couldn't ioremap\n"); + return -ENOMEM; + } + + asic->irq_base = pdata->irq_base; + + /* calculate bus shift from mem resource */ + asic->bus_shift = 2 - (resource_size(mem) >> 12); + + clksel = 0; + asic3_write_register(asic, ASIC3_OFFSET(CLOCK, SEL), clksel); + + ret = asic3_irq_probe(pdev); + if (ret < 0) { + dev_err(asic->dev, "Couldn't probe IRQs\n"); + goto out_unmap; + } + + asic->gpio.label = "asic3"; + asic->gpio.base = pdata->gpio_base; + asic->gpio.ngpio = ASIC3_NUM_GPIOS; + asic->gpio.get = asic3_gpio_get; + asic->gpio.set = asic3_gpio_set; + asic->gpio.direction_input = asic3_gpio_direction_input; + asic->gpio.direction_output = asic3_gpio_direction_output; + asic->gpio.to_irq = asic3_gpio_to_irq; + + ret = asic3_gpio_probe(pdev, + pdata->gpio_config, + pdata->gpio_config_num); + if (ret < 0) { + dev_err(asic->dev, "GPIO probe failed\n"); + goto out_irq; + } + + /* Making a per-device copy is only needed for the + * theoretical case of multiple ASIC3s on one board: + */ + memcpy(asic->clocks, asic3_clk_init, sizeof(asic3_clk_init)); + + asic3_mfd_probe(pdev, pdata, mem); + + asic3_set_register(asic, ASIC3_OFFSET(EXTCF, SELECT), + (ASIC3_EXTCF_CF0_BUF_EN|ASIC3_EXTCF_CF0_PWAIT_EN), 1); + + dev_info(asic->dev, "ASIC3 Core driver\n"); + + return 0; + + out_irq: + asic3_irq_remove(pdev); + + out_unmap: + iounmap(asic->mapping); + + return ret; +} + +static int asic3_remove(struct platform_device *pdev) +{ + int ret; + struct asic3 *asic = platform_get_drvdata(pdev); + + asic3_set_register(asic, ASIC3_OFFSET(EXTCF, SELECT), + (ASIC3_EXTCF_CF0_BUF_EN|ASIC3_EXTCF_CF0_PWAIT_EN), 0); + + asic3_mfd_remove(pdev); + + ret = asic3_gpio_remove(pdev); + if (ret < 0) + return ret; + asic3_irq_remove(pdev); + + asic3_write_register(asic, ASIC3_OFFSET(CLOCK, SEL), 0); + + iounmap(asic->mapping); + + return 0; +} + +static void asic3_shutdown(struct platform_device *pdev) +{ +} + +static struct platform_driver asic3_device_driver = { + .driver = { + .name = "asic3", + }, + .remove = asic3_remove, + .shutdown = asic3_shutdown, +}; + +static int __init asic3_init(void) +{ + int retval = 0; + retval = platform_driver_probe(&asic3_device_driver, asic3_probe); + return retval; +} + +subsys_initcall(asic3_init); |