LoCoMo is a GA used on Sharp Zaurus SL-5x00. Current driver does has
several design issues (special bus instead of platform bus, doesn't use
mfd-core, etc).
Implement 'core' parts of locomo support as an mfd driver.
Signed-off-by: Dmitry Eremin-Solenikov <dbaryshkov@xxxxxxxxx>
---
drivers/mfd/Kconfig | 8 +
drivers/mfd/Makefile | 1 +
drivers/mfd/locomo.c | 644 +++++++++++++++++++++++++++++++++++++++++++++
include/linux/mfd/locomo.h | 171 ++++++++++++
4 files changed, 824 insertions(+)
create mode 100644 drivers/mfd/locomo.c
create mode 100644 include/linux/mfd/locomo.h
diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index 1456ea7..1824a12 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -1318,6 +1318,14 @@ config MFD_STW481X
in various ST Microelectronics and ST-Ericsson embedded
Nomadik series.
+config MFD_LOCOMO
+ bool "Sharp LoCoMo support"
+ depends on ARM
+ select MFD_CORE
+ help
+ Support for Sharp LoCoMo Grid Array found in Sharp SL-5x00
+ PDA family.
+
menu "Multimedia Capabilities Port drivers"
depends on ARCH_SA1100
diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
index 8bd54b1..a4ea8de 100644
--- a/drivers/mfd/Makefile
+++ b/drivers/mfd/Makefile
@@ -174,6 +174,7 @@ obj-$(CONFIG_MFD_STW481X) += stw481x.o
obj-$(CONFIG_MFD_IPAQ_MICRO) += ipaq-micro.o
obj-$(CONFIG_MFD_MENF21BMC) += menf21bmc.o
obj-$(CONFIG_MFD_HI6421_PMIC) += hi6421-pmic-core.o
+obj-$(CONFIG_MFD_LOCOMO) += locomo.o
intel-soc-pmic-objs := intel_soc_pmic_core.o intel_soc_pmic_crc.o
obj-$(CONFIG_INTEL_SOC_PMIC) += intel-soc-pmic.o
diff --git a/drivers/mfd/locomo.c b/drivers/mfd/locomo.c
new file mode 100644
index 0000000..16b0208
--- /dev/null
+++ b/drivers/mfd/locomo.c
@@ -0,0 +1,644 @@
+/*
+ * Sharp LoCoMo support
+ *
+ * Based on old driver at arch/arm/common/locomo.c
+ *
+ * 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.
+ *
+ * This file contains all generic LoCoMo support.
+ *
+ * All initialization functions provided here are intended to be called
+ * from machine specific code with proper arguments when required.
+ */
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/io.h>
+#include <linux/irq.h>
+#include <linux/delay.h>
+#include <linux/gpio.h>
+#include <linux/platform_device.h>
+#include <linux/mfd/core.h>
+#include <linux/mfd/locomo.h>
+
+/* LoCoMo Interrupts */
+#define IRQ_LOCOMO_KEY (0)
+#define IRQ_LOCOMO_GPIO (1)
+#define IRQ_LOCOMO_LT (2)
+#define IRQ_LOCOMO_SPI (3)
+
+#define LOCOMO_NR_IRQS (4)
+
+/* the following is the overall data for the locomo chip */
+struct locomo {
+ unsigned int irq;
+ int irq_base;
+ spinlock_t lock;
+ void __iomem *base;
+
+ bool has_amp_control;
+ int gpio_amp1_on;
+ int gpio_amp2_on;
+
+#ifdef CONFIG_PM_SLEEP
+ u16 LCM_ASD;
+#endif
+};
+
+static struct gpio locomo_amp_gpios[] = {
+ { 0, GPIOF_OUT_INIT_LOW, "AMP1 ON" },
+ { 0, GPIOF_OUT_INIT_LOW, "AMP2 ON" },
+};
+
+static struct resource locomo_kbd_resources[] = {
+ DEFINE_RES_MEM(LOCOMO_KEYBOARD, 0x10),
+ DEFINE_RES_IRQ(IRQ_LOCOMO_KEY),
+};
+
+static struct resource locomo_gpio_resources[] = {
+ DEFINE_RES_MEM(LOCOMO_GPIO, 0x28),
+ DEFINE_RES_IRQ(IRQ_LOCOMO_GPIO),
+};
+
+static struct resource locomo_lt_resources[] = {
+ DEFINE_RES_MEM(LOCOMO_LTC, 0x8),
+ DEFINE_RES_IRQ(IRQ_LOCOMO_LT),
+};
+
+static struct resource locomo_spi_resources[] = {
+ DEFINE_RES_MEM(LOCOMO_SPI, 0x30),
+ DEFINE_RES_IRQ(IRQ_LOCOMO_SPI),
+};
+
+static struct resource locomo_led_resources[] = {
+ DEFINE_RES_MEM(LOCOMO_LED, 0x8),
+};
+
+static struct resource locomo_backlight_resources[] = {
+ DEFINE_RES_MEM(LOCOMO_FRONTLIGHT, 0x08),
+};
+
+static struct resource locomo_lcd_resources[] = {
+ DEFINE_RES_MEM(LOCOMO_TFT, 0x08),
+};
+
+static struct resource locomo_audio_resources[] = {
+ DEFINE_RES_MEM(LOCOMO_AUDIO, 0x04),
+ DEFINE_RES_MEM(LOCOMO_PAIF, 0x04),
+};
+
+static struct mfd_cell locomo_cells[] = {
+ {
+ .name = "locomo-kbd",
+ .resources = locomo_kbd_resources,
+ .num_resources = ARRAY_SIZE(locomo_kbd_resources),
+ },
+ {
+ .name = "locomo-gpio",
+ .resources = locomo_gpio_resources,
+ .num_resources = ARRAY_SIZE(locomo_gpio_resources),
+ },
+ {
+ .name = "locomo-lt", /* Long time timer */
+ .resources = locomo_lt_resources,
+ .num_resources = ARRAY_SIZE(locomo_lt_resources),
+ },
+ {
+ .name = "locomo-spi",
+ .resources = locomo_spi_resources,
+ .num_resources = ARRAY_SIZE(locomo_spi_resources),
+ },
+ {
+ .name = "locomo-led",
+ .resources = locomo_led_resources,
+ .num_resources = ARRAY_SIZE(locomo_led_resources),
+ },
+ {
+ .name = "locomo-backlight",
+ .resources = locomo_backlight_resources,
+ .num_resources = ARRAY_SIZE(locomo_backlight_resources),
+ },
+ {
+ .name = "locomo-lcd",
+ .resources = locomo_lcd_resources,
+ .num_resources = ARRAY_SIZE(locomo_lcd_resources),
+ },
+ {
+ .name = "locomo-audio",
+ .resources = locomo_audio_resources,
+ .num_resources = ARRAY_SIZE(locomo_audio_resources),
+ },
+};
+
+/* DAC send data */
+#define M62332_SLAVE_ADDR 0x4e /* Slave address */
+#define M62332_W_BIT 0x00 /* W bit (0 only) */
+#define M62332_SUB_ADDR 0x00 /* Sub address */
+#define M62332_A_BIT 0x00 /* A bit (0 only) */
+
+/* DAC setup and hold times (expressed in us) */
+#define DAC_BUS_FREE_TIME 5 /* 4.7 us */
+#define DAC_START_SETUP_TIME 5 /* 4.7 us */
+#define DAC_STOP_SETUP_TIME 4 /* 4.0 us */
+#define DAC_START_HOLD_TIME 5 /* 4.7 us */
+#define DAC_SCL_LOW_HOLD_TIME 5 /* 4.7 us */
+#define DAC_SCL_HIGH_HOLD_TIME 4 /* 4.0 us */
+#define DAC_DATA_SETUP_TIME 1 /* 250 ns */
+#define DAC_DATA_HOLD_TIME 1 /* 300 ns */
+#define DAC_LOW_SETUP_TIME 1 /* 300 ns */
+#define DAC_HIGH_SETUP_TIME 1 /* 1000 ns */
+
+/* I2C dedicated to external DAC */
+static void locomo_m62332_sendbit(struct locomo *lchip, int bit)
+{
+ u16 r;
+
+ r = readw(lchip->base + LOCOMO_DAC);
+ r &= ~(LOCOMO_DAC_SCLOEB);
+ writew(r, lchip->base + LOCOMO_DAC);
+
+ udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */
+ udelay(DAC_DATA_HOLD_TIME); /* 300 nsec */
+
+ r = readw(lchip->base + LOCOMO_DAC);
+ r &= ~(LOCOMO_DAC_SDAOEB);
+ writew(r, lchip->base + LOCOMO_DAC);
+
+ udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */
+ udelay(DAC_SCL_LOW_HOLD_TIME); /* 4.7 usec */
+
+ if (bit & 1) {
+ r = readw(lchip->base + LOCOMO_DAC);
+ r |= LOCOMO_DAC_SDAOEB;
+ writew(r, lchip->base + LOCOMO_DAC);
+
+ udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */
+ } else {
+ r = readw(lchip->base + LOCOMO_DAC);
+ r &= ~(LOCOMO_DAC_SDAOEB);
+ writew(r, lchip->base + LOCOMO_DAC);
+
+ udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */
+ }
+ udelay(DAC_DATA_SETUP_TIME); /* 250 nsec */
+
+ r = readw(lchip->base + LOCOMO_DAC);
+ r |= LOCOMO_DAC_SCLOEB;
+ writew(r, lchip->base + LOCOMO_DAC);
+
+ udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */
+ udelay(DAC_SCL_HIGH_HOLD_TIME); /* 4.0 usec */
+}
+
+/* Start */
+static void locomo_m62332_start(struct locomo *lchip)
+{
+ u16 r;
+
+ udelay(DAC_BUS_FREE_TIME); /* 5.0 usec */
+
+ r = readw(lchip->base + LOCOMO_DAC);
+ r |= LOCOMO_DAC_SCLOEB | LOCOMO_DAC_SDAOEB;
+ writew(r, lchip->base + LOCOMO_DAC);
+
+ udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */
+ udelay(DAC_SCL_HIGH_HOLD_TIME); /* 4.0 usec */
+
+ r = readw(lchip->base + LOCOMO_DAC);
+ r &= ~(LOCOMO_DAC_SDAOEB);
+ writew(r, lchip->base + LOCOMO_DAC);
+
+ udelay(DAC_START_HOLD_TIME); /* 5.0 usec */
+ udelay(DAC_DATA_HOLD_TIME); /* 300 nsec */
+
+}
+
+/* Check A bit */
+static int locomo_m62332_check_a(struct locomo *lchip)
+{
+ u16 r;
+
+ r = readw(lchip->base + LOCOMO_DAC);
+ r &= ~(LOCOMO_DAC_SCLOEB);
+ writew(r, lchip->base + LOCOMO_DAC);
+
+ udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */
+ udelay(DAC_SCL_LOW_HOLD_TIME); /* 4.7 usec */
+
+ r = readw(lchip->base + LOCOMO_DAC);
+ r &= ~(LOCOMO_DAC_SDAOEB);
+ writew(r, lchip->base + LOCOMO_DAC);
+
+ udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */
+
+ r = readw(lchip->base + LOCOMO_DAC);
+ r |= LOCOMO_DAC_SCLOEB;
+ writew(r, lchip->base + LOCOMO_DAC);
+
+ udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */
+ udelay(DAC_SCL_HIGH_HOLD_TIME); /* 4.7 usec */
+
+ return readw(lchip->base + LOCOMO_DAC) & LOCOMO_DAC_SDAOEB;
+}
+
+/* Stop */
+static void locomo_m62332_stop(struct locomo *lchip)
+{
+ u16 r;
+
+ r = readw(lchip->base + LOCOMO_DAC);
+ r &= ~(LOCOMO_DAC_SCLOEB);
+ writew(r, lchip->base + LOCOMO_DAC);
+
+ udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */
+ udelay(DAC_SCL_LOW_HOLD_TIME); /* 4.7 usec */
+
+ r = readw(lchip->base + LOCOMO_DAC);
+ r |= LOCOMO_DAC_SCLOEB;
+ writew(r, lchip->base + LOCOMO_DAC);
+
+ udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */
+ udelay(DAC_SCL_HIGH_HOLD_TIME); /* 4 usec */
+
+ r = readw(lchip->base + LOCOMO_DAC);
+ r |= LOCOMO_DAC_SDAOEB;
+ writew(r, lchip->base + LOCOMO_DAC);
+
+ udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */
+ udelay(DAC_SCL_HIGH_HOLD_TIME); /* 4 usec */
+
+ r = readw(lchip->base + LOCOMO_DAC);
+ r |= LOCOMO_DAC_SCLOEB | LOCOMO_DAC_SDAOEB;
+ writew(r, lchip->base + LOCOMO_DAC);
+
+ udelay(DAC_LOW_SETUP_TIME); /* 1000 nsec */
+ udelay(DAC_SCL_LOW_HOLD_TIME); /* 4.7 usec */
+}
+
+void locomo_m62332_senddata(struct device *dev, unsigned int dac_data,
+ int channel)
+{
+ struct locomo *lchip = dev_get_drvdata(dev);
+ int i;
+ unsigned char data;
+ unsigned long flags;
+
+ /* This works for now */
+ if (lchip->has_amp_control && dac_data) {
+ gpio_set_value(lchip->gpio_amp1_on, 1);
+ gpio_set_value(lchip->gpio_amp2_on, 1);
+ mdelay(5);
+ }
+
+ spin_lock_irqsave(&lchip->lock, flags);
+
+ locomo_m62332_start(lchip);
+
+ /* Send slave address and W bit (LSB is W bit) */
+ data = (M62332_SLAVE_ADDR << 1) | M62332_W_BIT;
+ for (i = 1; i <= 8; i++)
+ locomo_m62332_sendbit(lchip, data >> (8 - i));
+
+ if (locomo_m62332_check_a(lchip)) { /* High is error */
+ dev_warn(dev, "locomo: m62332_senddata Error 1\n");
+ goto out;
+ }
+
+ /* Send Sub address (LSB is channel select) */
+ /* channel = 0 : ch1 select */
+ /* = 1 : ch2 select */
+ data = M62332_SUB_ADDR + channel;
+ for (i = 1; i <= 8; i++)
+ locomo_m62332_sendbit(lchip, data >> (8 - i));
+
+ if (locomo_m62332_check_a(lchip)) { /* High is error */
+ dev_warn(dev, "locomo: m62332_senddata Error 2\n");
+ goto out;
+ }
+
+ /* Send DAC data */
+ for (i = 1; i <= 8; i++)
+ locomo_m62332_sendbit(lchip, dac_data >> (8 - i));
+
+ if (locomo_m62332_check_a(lchip)) { /* High is error */
+ dev_warn(dev, "locomo: m62332_senddata Error 3\n");
+ goto out;
+ }
+
+out:
+ locomo_m62332_stop(lchip);
+
+ spin_unlock_irqrestore(&lchip->lock, flags);
+
+ /* This works for now */
+ if (lchip->has_amp_control && !dac_data) {
+ mdelay(5);
+ gpio_set_value(lchip->gpio_amp1_on, 0);
+ gpio_set_value(lchip->gpio_amp2_on, 0);
+ }
+
+}
+EXPORT_SYMBOL(locomo_m62332_senddata);
+
+/* IRQ support */
+static void locomo_handler(unsigned int irq, struct irq_desc *desc)
+{
+ struct locomo *lchip = irq_get_handler_data(irq);
+ int req, i;
+
+ /* Acknowledge the parent IRQ */
+ desc->irq_data.chip->irq_ack(&desc->irq_data);
+
+ /* check why this interrupt was generated */
+ req = readw(lchip->base + LOCOMO_ICR) & 0x0f00;
+
+ if (req) {
+ /* generate the next interrupt(s) */
+ irq = lchip->irq_base;
+ for (i = 0; i <= 3; i++, irq++) {
+ if (req & (0x0100 << i))
+ generic_handle_irq(irq);
+
+ }
+ }
+}
+
+static void locomo_ack_irq(struct irq_data *d)
+{
+}
+
+static void locomo_mask_irq(struct irq_data *d)
+{
+ struct locomo *lchip = irq_data_get_irq_chip_data(d);
+ unsigned int r;
+
+ r = readw(lchip->base + LOCOMO_ICR);
+ r &= ~(0x0010 << (d->irq - lchip->irq_base));
+ writew(r, lchip->base + LOCOMO_ICR);
+}
+
+static void locomo_unmask_irq(struct irq_data *d)
+{
+ struct locomo *lchip = irq_data_get_irq_chip_data(d);
+ unsigned int r;
+
+ r = readw(lchip->base + LOCOMO_ICR);
+ r |= (0x0010 << (d->irq - lchip->irq_base));
+ writew(r, lchip->base + LOCOMO_ICR);
+}
+
+static struct irq_chip locomo_chip = {
+ .name = "LOCOMO",
+ .irq_ack = locomo_ack_irq,
+ .irq_mask = locomo_mask_irq,
+ .irq_unmask = locomo_unmask_irq,
+};
+
+static void locomo_setup_irq(struct locomo *lchip)
+{
+ int irq;
+
+ lchip->irq_base = irq_alloc_descs(-1, 0, LOCOMO_NR_IRQS, -1);
+
+ /* Install handlers for IRQ_LOCOMO_* */
+ for (irq = lchip->irq_base;
+ irq < lchip->irq_base + LOCOMO_NR_IRQS;
+ irq++) {
+ irq_set_chip_and_handler(irq, &locomo_chip, handle_level_irq);
+ irq_set_chip_data(irq, lchip);
+ set_irq_flags(irq, IRQF_VALID | IRQF_PROBE);
+ }
+
+ /*
+ * Install handler for IRQ_LOCOMO_HW.
+ */
+ irq_set_irq_type(lchip->irq, IRQ_TYPE_EDGE_FALLING);
+ irq_set_handler_data(lchip->irq, lchip);
+ irq_set_chained_handler(lchip->irq, locomo_handler);
+}
+
+
+#ifdef CONFIG_PM_SLEEP
+static int locomo_suspend(struct device *dev)
+{
+ struct locomo *lchip = dev_get_drvdata(dev);
+ unsigned long flags;
+
+ spin_lock_irqsave(&lchip->lock, flags);
+
+ /* ADSTART */
+ lchip->LCM_ASD = readw(lchip->base + LOCOMO_ASD); /* ADSTART */
+ writew(0x00, lchip->base + LOCOMO_ASD);
+
+ /* AUDIO */
+ writew(0x00, lchip->base + LOCOMO_PAIF);
+ writew(0x00, lchip->base + LOCOMO_DAC);
+
+ if ((readw(lchip->base + LOCOMO_LED + LOCOMO_LPT0) & 0x88) &&
+ (readw(lchip->base + LOCOMO_LED + LOCOMO_LPT1) & 0x88))
+ /* CLK32 off */
+ writew(0x00, lchip->base + LOCOMO_C32K);
+ else
+ /* 18MHz already enabled, so no wait */
+ /* CLK32 on */
+ writew(0xc1, lchip->base + LOCOMO_C32K);
+
+ /* 18MHz clock off*/
+ writew(0x00, lchip->base + LOCOMO_TADC);
+ /* 22MHz/24MHz clock off */
+ writew(0x00, lchip->base + LOCOMO_AUDIO + LOCOMO_ACC);
+
+ spin_unlock_irqrestore(&lchip->lock, flags);
+
+ return 0;
+}
+
+static int locomo_resume(struct device *dev)
+{
+ struct locomo *lchip = dev_get_drvdata(dev);
+ unsigned long flags;
+
+ spin_lock_irqsave(&lchip->lock, flags);
+
+ writew(lchip->LCM_ASD, lchip->base + LOCOMO_ASD);
+
+ writew(0x00, lchip->base + LOCOMO_C32K);
+ writew(0x90, lchip->base + LOCOMO_TADC);
+
+ spin_unlock_irqrestore(&lchip->lock, flags);
+
+ return 0;
+}
+static SIMPLE_DEV_PM_OPS(locomo_pm, locomo_suspend, locomo_resume);
+#define LOCOMO_PM (&locomo_pm)
+#else
+#define LOCOMO_PM NULL
+#endif
+
+static int locomo_probe(struct platform_device *dev)
+{
+ struct locomo_platform_data *pdata = dev_get_platdata(&dev->dev);
+ struct resource *mem;
+ int irq;
+ struct locomo *lchip;
+ unsigned long r;
+ int ret = -ENODEV;
+
+ mem = platform_get_resource(dev, IORESOURCE_MEM, 0);
+ if (!mem)
+ return -EINVAL;
+ irq = platform_get_irq(dev, 0);
+ if (irq < 0)
+ return -ENXIO;
+
+ lchip = devm_kzalloc(&dev->dev, sizeof(struct locomo), GFP_KERNEL);
+ if (!lchip)
+ return -ENOMEM;
+
+ spin_lock_init(&lchip->lock);
+
+ /*
+ * Map the whole region. This also maps the
+ * registers for our children.
+ */
+ lchip->base = devm_ioremap(&dev->dev, mem->start, resource_size(mem));
+ if (!lchip->base)
+ return -ENOMEM;
+
+ lchip->irq = irq;
+ platform_set_drvdata(dev, lchip);
+
+ if (pdata) {
+ locomo_cells[1].platform_data = &pdata->gpio_data;
+ locomo_cells[1].pdata_size =
+ sizeof(struct locomo_gpio_platform_data);
+ locomo_cells[5].platform_data = &pdata->bl_data;
+ locomo_cells[5].pdata_size =
+ sizeof(struct locomo_bl_platform_data);
+ locomo_cells[6].platform_data = &pdata->lcd_data;
+ locomo_cells[6].pdata_size =
+ sizeof(struct locomo_lcd_platform_data);
+
+ lchip->gpio_amp1_on = pdata->gpio_amp1_on;
+ lchip->gpio_amp2_on = pdata->gpio_amp2_on;
+ }
+
+ if (gpio_is_valid(lchip->gpio_amp1_on) &&
+ gpio_is_valid(lchip->gpio_amp2_on)) {
+ lchip->has_amp_control = true;
+ locomo_amp_gpios[0].gpio = lchip->gpio_amp1_on;
+ locomo_amp_gpios[1].gpio = lchip->gpio_amp2_on;
+ ret = gpio_request_array(locomo_amp_gpios,
+ ARRAY_SIZE(locomo_amp_gpios));
+ if (ret)
+ return ret;
+ }
+
+ /* locomo initialize */
+ writew(0, lchip->base + LOCOMO_ICR);
+
+ /* Longtime timer */
+ writew(0, lchip->base + LOCOMO_LTINT);
+ /* SPI */
+ writew(0, lchip->base + LOCOMO_SPI + LOCOMO_SPIIE);
+
+ writew(6 + 8 + 320 + 30 - 10, lchip->base + LOCOMO_ASD);
+ r = readw(lchip->base + LOCOMO_ASD);
+ r |= 0x8000;
+ writew(r, lchip->base + LOCOMO_ASD);
+
+ writew(6 + 8 + 320 + 30 - 10 - 128 + 4, lchip->base + LOCOMO_HSD);
+ r = readw(lchip->base + LOCOMO_HSD);
+ r |= 0x8000;
+ writew(r, lchip->base + LOCOMO_HSD);
+
+ writew(128 / 8, lchip->base + LOCOMO_HSC);
+
+ /* XON */
+ writew(0x80, lchip->base + LOCOMO_TADC);
+ udelay(1000);
+ /* CLK9MEN */
+ r = readw(lchip->base + LOCOMO_TADC);
+ r |= 0x10;
+ writew(r, lchip->base + LOCOMO_TADC);
+ udelay(100);
+
+ /* init DAC */
+ r = readw(lchip->base + LOCOMO_DAC);
+ r |= LOCOMO_DAC_SCLOEB | LOCOMO_DAC_SDAOEB;
+ writew(r, lchip->base + LOCOMO_DAC);
+
+ r = readw(lchip->base + LOCOMO_VER);
+ dev_info(&dev->dev, "LoCoMo Chip: %lu%lu\n", (r >> 8), (r & 0xff));
+
+ /*
+ * The interrupt controller must be initialised before any
+ * other device to ensure that the interrupts are available.
+ */
+ if (lchip->irq != NO_IRQ)
+ locomo_setup_irq(lchip);
+
+ ret = mfd_add_devices(&dev->dev, dev->id,
+ locomo_cells, ARRAY_SIZE(locomo_cells),
+ mem, lchip->irq_base, NULL);
+ if (ret)
+ goto err_add;
+
+ return 0;
+
+err_add:
+ if (lchip->irq != NO_IRQ) {
+ irq_set_chained_handler(lchip->irq, NULL);
+ irq_set_handler_data(lchip->irq, NULL);
+ irq_free_descs(lchip->irq_base, LOCOMO_NR_IRQS);
+ }
+
+ if (lchip->has_amp_control)
+ gpio_free_array(locomo_amp_gpios,
+ ARRAY_SIZE(locomo_amp_gpios));
+ platform_set_drvdata(dev, NULL);
+
+ return ret;
+}
+
+static int locomo_remove(struct platform_device *dev)
+{
+ struct locomo *lchip = platform_get_drvdata(dev);
+
+ if (!lchip)
+ return 0;
+
+ mfd_remove_devices(&dev->dev);
+
+ if (lchip->irq != NO_IRQ) {
+ irq_set_chained_handler(lchip->irq, NULL);
+ irq_set_handler_data(lchip->irq, NULL);
+ irq_free_descs(lchip->irq_base, LOCOMO_NR_IRQS);
+ }
+
+ if (lchip->has_amp_control)
+ gpio_free_array(locomo_amp_gpios,
+ ARRAY_SIZE(locomo_amp_gpios));
+ platform_set_drvdata(dev, NULL);
+
+ return 0;
+}
+
+static struct platform_driver locomo_device_driver = {
+ .probe = locomo_probe,
+ .remove = locomo_remove,
+ .driver = {
+ .name = "locomo",
+ .owner = THIS_MODULE,
+ .pm = LOCOMO_PM,
+ },
+};
+
+module_platform_driver(locomo_device_driver);
+
+MODULE_DESCRIPTION("Sharp LoCoMo core driver");
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("John Lenz <lenz@xxxxxxxxxxx>");
+MODULE_ALIAS("platform:locomo");
diff --git a/include/linux/mfd/locomo.h b/include/linux/mfd/locomo.h
new file mode 100644
index 0000000..1f54300
--- /dev/null
+++ b/include/linux/mfd/locomo.h
@@ -0,0 +1,171 @@
+/*
+ * include/linux/mfd/locomo.h
+ *
+ * This file contains the definitions for the LoCoMo G/A Chip
+ *
+ * (C) Copyright 2004 John Lenz
+ *
+ * May be copied or modified under the terms of the GNU General Public
+ * License. See linux/COPYING for more information.
+ *
+ * Based on sa1111.h
+ */
+#ifndef _ASM_ARCH_LOCOMO
+#define _ASM_ARCH_LOCOMO
+
+/* LOCOMO version */
+#define LOCOMO_VER 0x00
+
+/* Pin status */
+#define LOCOMO_ST 0x04
+
+/* Pin status */
+#define LOCOMO_C32K 0x08
+
+/* Interrupt controller */
+#define LOCOMO_ICR 0x0C
+
+/* MCS decoder for boot selecting */
+#define LOCOMO_MCSX0 0x10
+#define LOCOMO_MCSX1 0x14
+#define LOCOMO_MCSX2 0x18
+#define LOCOMO_MCSX3 0x1c
+
+/* Touch panel controller */
+#define LOCOMO_ASD 0x20 /* AD start delay */
+#define LOCOMO_HSD 0x28 /* HSYS delay */
+#define LOCOMO_HSC 0x2c /* HSYS period */
+#define LOCOMO_TADC 0x30 /* tablet ADC clock */
+
+
+/* Long time timer */
+#define LOCOMO_LTC 0xd8 /* LTC interrupt setting */
+#define LOCOMO_LTINT 0xdc /* LTC interrupt */
+
+/* DAC control signal for LCD (COMADJ ) */
+#define LOCOMO_DAC 0xe0
+/* DAC control */
+#define LOCOMO_DAC_SCLOEB 0x08 /* SCL pin output data */
+#define LOCOMO_DAC_TEST 0x04 /* Test bit */
+#define LOCOMO_DAC_SDA 0x02 /* SDA pin level (read-only) */
+#define LOCOMO_DAC_SDAOEB 0x01 /* SDA pin output data */
+
+/* SPI interface */
+#define LOCOMO_SPI 0x60
+#define LOCOMO_SPIMD 0x00 /* SPI mode setting */
+#define LOCOMO_SPICT 0x04 /* SPI mode control */
+#define LOCOMO_SPIST 0x08 /* SPI status */
+#define LOCOMO_SPI_TEND (1 << 3) /* Transfer end bit */
+#define LOCOMO_SPI_REND (1 << 2) /* Receive end bit */
+#define LOCOMO_SPI_RFW (1 << 1) /* write buffer bit */
+#define LOCOMO_SPI_RFR (1) /* read buffer bit */
+
+#define LOCOMO_SPIIS 0x10 /* SPI interrupt status */
+#define LOCOMO_SPIWE 0x14 /* SPI interrupt status write enable */
+#define LOCOMO_SPIIE 0x18 /* SPI interrupt enable */
+#define LOCOMO_SPIIR 0x1c /* SPI interrupt request */
+#define LOCOMO_SPITD 0x20 /* SPI transfer data write */
+#define LOCOMO_SPIRD 0x24 /* SPI receive data read */
+#define LOCOMO_SPITS 0x28 /* SPI transfer data shift */
+#define LOCOMO_SPIRS 0x2C /* SPI receive data shift */
+
+/* GPIO */
+#define LOCOMO_GPIO 0x90
+#define LOCOMO_GPD 0x00 /* GPIO direction */
+#define LOCOMO_GPE 0x04 /* GPIO input enable */
+#define LOCOMO_GPL 0x08 /* GPIO level */
+#define LOCOMO_GPO 0x0c /* GPIO out data setting */
+#define LOCOMO_GRIE 0x10 /* GPIO rise detection */
+#define LOCOMO_GFIE 0x14 /* GPIO fall detection */
+#define LOCOMO_GIS 0x18 /* GPIO edge detection status */
+#define LOCOMO_GWE 0x1c /* GPIO status write enable */
+#define LOCOMO_GIE 0x20 /* GPIO interrupt enable */
+#define LOCOMO_GIR 0x24 /* GPIO interrupt request */
+
+/* Start the definitions of the devices. Each device has an initial
+ * base address and a series of offsets from that base address. */
+
+/* Keyboard controller */
+#define LOCOMO_KEYBOARD 0x40
+#define LOCOMO_KIB 0x00 /* KIB level */
+#define LOCOMO_KSC 0x04 /* KSTRB control */
+#define LOCOMO_KCMD 0x08 /* KSTRB command */
+#define LOCOMO_KIC 0x0c /* Key interrupt */
+
+/* Front light adjustment controller */
+#define LOCOMO_FRONTLIGHT 0xc8
+#define LOCOMO_ALS 0x00 /* Adjust light cycle */
+#define LOCOMO_ALD 0x04 /* Adjust light duty */
+
+#define LOCOMO_ALC_EN 0x8000
+
+/* Backlight controller: TFT signal */
+#define LOCOMO_TFT 0x38
+#define LOCOMO_TC 0x00 /* TFT control signal */
+#define LOCOMO_CPSD 0x04 /* CPS delay */
+
+/* Audio controller */
+#define LOCOMO_AUDIO 0x54
+#define LOCOMO_ACC 0x00 /* Audio clock */
+#define LOCOMO_PAIF 0xD0 /* PCM audio interface */
+/* Audio clock */
+#define LOCOMO_ACC_XON 0x80
+#define LOCOMO_ACC_XEN 0x40
+#define LOCOMO_ACC_XSEL0 0x00
+#define LOCOMO_ACC_XSEL1 0x20
+#define LOCOMO_ACC_MCLKEN 0x10
+#define LOCOMO_ACC_64FSEN 0x08
+#define LOCOMO_ACC_CLKSEL000 0x00 /* mclk 2 */
+#define LOCOMO_ACC_CLKSEL001 0x01 /* mclk 3 */
+#define LOCOMO_ACC_CLKSEL010 0x02 /* mclk 4 */
+#define LOCOMO_ACC_CLKSEL011 0x03 /* mclk 6 */
+#define LOCOMO_ACC_CLKSEL100 0x04 /* mclk 8 */
+#define LOCOMO_ACC_CLKSEL101 0x05 /* mclk 12 */
+/* PCM audio interface */
+#define LOCOMO_PAIF_SCINV 0x20
+#define LOCOMO_PAIF_SCEN 0x10
+#define LOCOMO_PAIF_LRCRST 0x08
+#define LOCOMO_PAIF_LRCEVE 0x04
+#define LOCOMO_PAIF_LRCINV 0x02
+#define LOCOMO_PAIF_LRCEN 0x01
+
+/* LED controller */
+#define LOCOMO_LED 0xe8
+#define LOCOMO_LPT0 0x00
+#define LOCOMO_LPT1 0x04
+/* LED control */
+#define LOCOMO_LPT_TOFH 0x80
+#define LOCOMO_LPT_TOFL 0x08
+#define LOCOMO_LPT_TOH(TOH) ((TOH & 0x7) << 4)
+#define LOCOMO_LPT_TOL(TOL) ((TOL & 0x7))
+
+struct locomo_gpio_platform_data {
+ unsigned int gpio_base;
+};
+
+struct locomo_lcd_platform_data {
+ u8 comadj;
+ int gpio_lcd_vsha_on;
+ int gpio_lcd_vshd_on;
+ int gpio_lcd_vee_on;
+ int gpio_lcd_mod;
+};
+
+struct locomo_bl_platform_data {
+ int gpio_fl_vr;
+};
+
+struct locomo_platform_data {
+ struct locomo_gpio_platform_data gpio_data;
+ struct locomo_lcd_platform_data lcd_data;
+ struct locomo_bl_platform_data bl_data;
+
+ int gpio_amp1_on;
+ int gpio_amp2_on;
+};
+
+/* Send data to i2c DAC connected to LoCoMo i2c bus */
+extern void locomo_m62332_senddata(struct device *dev, unsigned int dac_data,
+ int channel);
+
+#endif
--
2.1.1
--
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