--- /dev/null
+/*
+ * 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);
Code Review / kvmfornfv.git / blobdiff