mfd: driver for the T7L66XB TMIO SoC
authorIan Molton <spyro@f2s.com>
Tue, 15 Jul 2008 14:09:43 +0000 (15:09 +0100)
committerSamuel Ortiz <sameo@openedhand.com>
Sun, 10 Aug 2008 18:09:50 +0000 (20:09 +0200)
This patchset provides support for the core functinality of the T7L66XB
SoC from Toshiba. Supported in this patchset is the IRQ MUX, MMC controller
and NAND flash controller.

Signed-off-by: Ian Molton <spyro@f2s.com>
Signed-off-by: Samuel Ortiz <sameo@openedhand.com>
drivers/mfd/Kconfig
drivers/mfd/Makefile
drivers/mfd/t7l66xb.c [new file with mode: 0644]
include/linux/mfd/t7l66xb.h [new file with mode: 0644]

index 883e7ea31de20af9d32df5cc6a09ff1d7c6041fd..fc7c919693bf4e9ec7ab0a19f3ea11729cc8e8b2 100644 (file)
@@ -50,6 +50,12 @@ config HTC_PASIC3
          HTC Magician devices, respectively. Actual functionality is
          handled by the leds-pasic3 and ds1wm drivers.
 
+config MFD_T7L66XB
+       bool "Support Toshiba T7L66XB"
+       select MFD_CORE
+       help
+         Support for Toshiba Mobile IO Controller T7L66XB
+
 config MFD_TC6393XB
        bool "Support Toshiba TC6393XB"
        depends on GPIOLIB && ARM
index 33daa2f45dd8c7da6d6aba43a82467833d195239..3531ad2a276c6343c538bd3f2e42568eab3a7947 100644 (file)
@@ -8,6 +8,7 @@ obj-$(CONFIG_MFD_ASIC3)         += asic3.o
 obj-$(CONFIG_HTC_EGPIO)                += htc-egpio.o
 obj-$(CONFIG_HTC_PASIC3)       += htc-pasic3.o
 
+obj-$(CONFIG_MFD_T7L66XB)      += t7l66xb.o
 obj-$(CONFIG_MFD_TC6393XB)     += tc6393xb.o
 
 obj-$(CONFIG_MFD_CORE)         += mfd-core.o
diff --git a/drivers/mfd/t7l66xb.c b/drivers/mfd/t7l66xb.c
new file mode 100644 (file)
index 0000000..5be4205
--- /dev/null
@@ -0,0 +1,409 @@
+/*
+ *
+ * Toshiba T7L66XB core mfd support
+ *
+ * Copyright (c) 2005, 2007, 2008 Ian Molton
+ * Copyright (c) 2008 Dmitry Baryshkov
+ *
+ * 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.
+ *
+ * T7L66 features:
+ *
+ * Supported in this driver:
+ * SD/MMC
+ * SM/NAND flash controller
+ *
+ * As yet not supported
+ * GPIO interface (on NAND pins)
+ * Serial interface
+ * TFT 'interface converter'
+ * PCMCIA interface logic
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/io.h>
+#include <linux/irq.h>
+#include <linux/platform_device.h>
+#include <linux/mfd/core.h>
+#include <linux/mfd/tmio.h>
+#include <linux/mfd/t7l66xb.h>
+
+enum {
+       T7L66XB_CELL_NAND,
+       T7L66XB_CELL_MMC,
+};
+
+#define SCR_REVID      0x08            /* b Revision ID        */
+#define SCR_IMR                0x42            /* b Interrupt Mask     */
+#define SCR_DEV_CTL    0xe0            /* b Device control     */
+#define SCR_ISR                0xe1            /* b Interrupt Status   */
+#define SCR_GPO_OC     0xf0            /* b GPO output control */
+#define SCR_GPO_OS     0xf1            /* b GPO output enable  */
+#define SCR_GPI_S      0xf2            /* w GPI status         */
+#define SCR_APDC       0xf8            /* b Active pullup down ctrl */
+
+#define SCR_DEV_CTL_USB                BIT(0)  /* USB enable           */
+#define SCR_DEV_CTL_MMC                BIT(1)  /* MMC enable           */
+
+/*--------------------------------------------------------------------------*/
+
+struct t7l66xb {
+       void __iomem            *scr;
+       /* Lock to protect registers requiring read/modify/write ops. */
+       spinlock_t              lock;
+
+       struct resource         rscr;
+       int                     irq;
+       int                     irq_base;
+};
+
+/*--------------------------------------------------------------------------*/
+
+static int t7l66xb_mmc_enable(struct platform_device *mmc)
+{
+       struct platform_device *dev = to_platform_device(mmc->dev.parent);
+       struct t7l66xb_platform_data   *pdata = dev->dev.platform_data;
+       struct t7l66xb *t7l66xb = platform_get_drvdata(dev);
+       unsigned long flags;
+       u8 dev_ctl;
+
+       if (pdata->enable_clk32k)
+               pdata->enable_clk32k(dev);
+
+       spin_lock_irqsave(&t7l66xb->lock, flags);
+
+       dev_ctl = tmio_ioread8(t7l66xb->scr + SCR_DEV_CTL);
+       dev_ctl |= SCR_DEV_CTL_MMC;
+       tmio_iowrite8(dev_ctl, t7l66xb->scr + SCR_DEV_CTL);
+
+       spin_unlock_irqrestore(&t7l66xb->lock, flags);
+
+       return 0;
+}
+
+static int t7l66xb_mmc_disable(struct platform_device *mmc)
+{
+       struct platform_device *dev = to_platform_device(mmc->dev.parent);
+       struct t7l66xb_platform_data   *pdata = dev->dev.platform_data;
+       struct t7l66xb *t7l66xb = platform_get_drvdata(dev);
+       unsigned long flags;
+       u8 dev_ctl;
+
+       spin_lock_irqsave(&t7l66xb->lock, flags);
+
+       dev_ctl = tmio_ioread8(t7l66xb->scr + SCR_DEV_CTL);
+       dev_ctl &= ~SCR_DEV_CTL_MMC;
+       tmio_iowrite8(dev_ctl, t7l66xb->scr + SCR_DEV_CTL);
+
+       spin_unlock_irqrestore(&t7l66xb->lock, flags);
+
+       if (pdata->disable_clk32k)
+               pdata->disable_clk32k(dev);
+
+       return 0;
+}
+
+/*--------------------------------------------------------------------------*/
+
+const static struct resource t7l66xb_mmc_resources[] = {
+       {
+               .start = 0x800,
+               .end    = 0x9ff,
+               .flags = IORESOURCE_MEM,
+       },
+       {
+               .start = 0x200,
+               .end    = 0x2ff,
+               .flags = IORESOURCE_MEM,
+       },
+       {
+               .start = IRQ_T7L66XB_MMC,
+               .end    = IRQ_T7L66XB_MMC,
+               .flags = IORESOURCE_IRQ,
+       },
+};
+
+const static struct resource t7l66xb_nand_resources[] = {
+       {
+               .start  = 0xc00,
+               .end    = 0xc07,
+               .flags  = IORESOURCE_MEM,
+       },
+       {
+               .start  = 0x0100,
+               .end    = 0x01ff,
+               .flags  = IORESOURCE_MEM,
+       },
+       {
+               .start  = IRQ_T7L66XB_NAND,
+               .end    = IRQ_T7L66XB_NAND,
+               .flags  = IORESOURCE_IRQ,
+       },
+};
+
+static struct mfd_cell t7l66xb_cells[] = {
+       [T7L66XB_CELL_MMC] = {
+               .name = "tmio-mmc",
+               .enable = t7l66xb_mmc_enable,
+               .disable = t7l66xb_mmc_disable,
+               .num_resources = ARRAY_SIZE(t7l66xb_mmc_resources),
+               .resources = t7l66xb_mmc_resources,
+       },
+       [T7L66XB_CELL_NAND] = {
+               .name = "tmio-nand",
+               .num_resources = ARRAY_SIZE(t7l66xb_nand_resources),
+               .resources = t7l66xb_nand_resources,
+       },
+};
+
+/*--------------------------------------------------------------------------*/
+
+/* Handle the T7L66XB interrupt mux */
+static void t7l66xb_irq(unsigned int irq, struct irq_desc *desc)
+{
+       struct t7l66xb *t7l66xb = get_irq_data(irq);
+       unsigned int isr;
+       unsigned int i, irq_base;
+
+       irq_base = t7l66xb->irq_base;
+
+       while ((isr = tmio_ioread8(t7l66xb->scr + SCR_ISR) &
+                               ~tmio_ioread8(t7l66xb->scr + SCR_IMR)))
+               for (i = 0; i < T7L66XB_NR_IRQS; i++)
+                       if (isr & (1 << i))
+                               generic_handle_irq(irq_base + i);
+}
+
+static void t7l66xb_irq_mask(unsigned int irq)
+{
+       struct t7l66xb *t7l66xb = get_irq_chip_data(irq);
+       unsigned long                   flags;
+       u8 imr;
+
+       spin_lock_irqsave(&t7l66xb->lock, flags);
+       imr = tmio_ioread8(t7l66xb->scr + SCR_IMR);
+       imr |= 1 << (irq - t7l66xb->irq_base);
+       tmio_iowrite8(imr, t7l66xb->scr + SCR_IMR);
+       spin_unlock_irqrestore(&t7l66xb->lock, flags);
+}
+
+static void t7l66xb_irq_unmask(unsigned int irq)
+{
+       struct t7l66xb *t7l66xb = get_irq_chip_data(irq);
+       unsigned long flags;
+       u8 imr;
+
+       spin_lock_irqsave(&t7l66xb->lock, flags);
+       imr = tmio_ioread8(t7l66xb->scr + SCR_IMR);
+       imr &= ~(1 << (irq - t7l66xb->irq_base));
+       tmio_iowrite8(imr, t7l66xb->scr + SCR_IMR);
+       spin_unlock_irqrestore(&t7l66xb->lock, flags);
+}
+
+static struct irq_chip t7l66xb_chip = {
+       .name   = "t7l66xb",
+       .ack    = t7l66xb_irq_mask,
+       .mask   = t7l66xb_irq_mask,
+       .unmask = t7l66xb_irq_unmask,
+};
+
+/*--------------------------------------------------------------------------*/
+
+/* Install the IRQ handler */
+static void t7l66xb_attach_irq(struct platform_device *dev)
+{
+       struct t7l66xb *t7l66xb = platform_get_drvdata(dev);
+       unsigned int irq, irq_base;
+
+       irq_base = t7l66xb->irq_base;
+
+       for (irq = irq_base; irq < irq_base + T7L66XB_NR_IRQS; irq++) {
+               set_irq_chip(irq, &t7l66xb_chip);
+               set_irq_chip_data(irq, t7l66xb);
+               set_irq_handler(irq, handle_level_irq);
+#ifdef CONFIG_ARM
+               set_irq_flags(irq, IRQF_VALID | IRQF_PROBE);
+#endif
+       }
+
+       set_irq_type(t7l66xb->irq, IRQ_TYPE_EDGE_FALLING);
+       set_irq_data(t7l66xb->irq, t7l66xb);
+       set_irq_chained_handler(t7l66xb->irq, t7l66xb_irq);
+}
+
+static void t7l66xb_detach_irq(struct platform_device *dev)
+{
+       struct t7l66xb *t7l66xb = platform_get_drvdata(dev);
+       unsigned int irq, irq_base;
+
+       irq_base = t7l66xb->irq_base;
+
+       set_irq_chained_handler(t7l66xb->irq, NULL);
+       set_irq_data(t7l66xb->irq, NULL);
+
+       for (irq = irq_base; irq < irq_base + T7L66XB_NR_IRQS; irq++) {
+#ifdef CONFIG_ARM
+               set_irq_flags(irq, 0);
+#endif
+               set_irq_chip(irq, NULL);
+               set_irq_chip_data(irq, NULL);
+       }
+}
+
+/*--------------------------------------------------------------------------*/
+
+#ifdef CONFIG_PM
+static int t7l66xb_suspend(struct platform_device *dev, pm_message_t state)
+{
+       struct t7l66xb_platform_data *pdata = dev->dev.platform_data;
+
+       if (pdata && pdata->suspend)
+               pdata->suspend(dev);
+
+       return 0;
+}
+
+static int t7l66xb_resume(struct platform_device *dev)
+{
+       struct t7l66xb_platform_data *pdata = dev->dev.platform_data;
+
+       if (pdata && pdata->resume)
+               pdata->resume(dev);
+
+       return 0;
+}
+#else
+#define t7l66xb_suspend NULL
+#define t7l66xb_resume NULL
+#endif
+
+/*--------------------------------------------------------------------------*/
+
+static int t7l66xb_probe(struct platform_device *dev)
+{
+       struct t7l66xb_platform_data *pdata = dev->dev.platform_data;
+       struct t7l66xb *t7l66xb;
+       struct resource *iomem, *rscr;
+       int ret;
+
+       iomem = platform_get_resource(dev, IORESOURCE_MEM, 0);
+       if (!iomem)
+               return -EINVAL;
+
+       t7l66xb = kzalloc(sizeof *t7l66xb, GFP_KERNEL);
+       if (!t7l66xb)
+               return -ENOMEM;
+
+       spin_lock_init(&t7l66xb->lock);
+
+       platform_set_drvdata(dev, t7l66xb);
+
+       ret = platform_get_irq(dev, 0);
+       if (ret >= 0)
+               t7l66xb->irq = ret;
+       else
+               goto err_noirq;
+
+       t7l66xb->irq_base = pdata->irq_base;
+
+       rscr = &t7l66xb->rscr;
+       rscr->name = "t7l66xb-core";
+       rscr->start = iomem->start;
+       rscr->end = iomem->start + 0xff;
+       rscr->flags = IORESOURCE_MEM;
+
+       ret = request_resource(iomem, rscr);
+       if (ret)
+               goto err_request_scr;
+
+       t7l66xb->scr = ioremap(rscr->start, rscr->end - rscr->start + 1);
+       if (!t7l66xb->scr) {
+               ret = -ENOMEM;
+               goto err_ioremap;
+       }
+
+       if (pdata && pdata->enable)
+               pdata->enable(dev);
+
+       /* Mask all interrupts */
+       tmio_iowrite8(0xbf, t7l66xb->scr + SCR_IMR);
+
+       printk(KERN_INFO "%s rev %d @ 0x%08lx, irq %d\n",
+               dev->name, tmio_ioread8(t7l66xb->scr + SCR_REVID),
+               (unsigned long)iomem->start, t7l66xb->irq);
+
+       t7l66xb_attach_irq(dev);
+
+       t7l66xb_cells[T7L66XB_CELL_NAND].driver_data = pdata->nand_data;
+
+       ret = mfd_add_devices(dev, t7l66xb_cells, ARRAY_SIZE(t7l66xb_cells),
+               iomem, t7l66xb->irq_base);
+
+       if (!ret)
+               return 0;
+
+       t7l66xb_detach_irq(dev);
+       iounmap(t7l66xb->scr);
+err_ioremap:
+       release_resource(&t7l66xb->rscr);
+err_noirq:
+err_request_scr:
+       kfree(t7l66xb);
+       return ret;
+}
+
+static int t7l66xb_remove(struct platform_device *dev)
+{
+       struct t7l66xb_platform_data *pdata = dev->dev.platform_data;
+       struct t7l66xb *t7l66xb = platform_get_drvdata(dev);
+       int ret;
+
+       ret = pdata->disable(dev);
+
+       t7l66xb_detach_irq(dev);
+       iounmap(t7l66xb->scr);
+       release_resource(&t7l66xb->rscr);
+       mfd_remove_devices(dev);
+       platform_set_drvdata(dev, NULL);
+       kfree(t7l66xb);
+
+       return ret;
+
+}
+
+static struct platform_driver t7l66xb_platform_driver = {
+       .driver = {
+               .name   = "t7l66xb",
+               .owner  = THIS_MODULE,
+       },
+       .suspend        = t7l66xb_suspend,
+       .resume         = t7l66xb_resume,
+       .probe          = t7l66xb_probe,
+       .remove         = t7l66xb_remove,
+};
+
+/*--------------------------------------------------------------------------*/
+
+static int __init t7l66xb_init(void)
+{
+       int retval = 0;
+
+       retval = platform_driver_register(&t7l66xb_platform_driver);
+       return retval;
+}
+
+static void __exit t7l66xb_exit(void)
+{
+       platform_driver_unregister(&t7l66xb_platform_driver);
+}
+
+module_init(t7l66xb_init);
+module_exit(t7l66xb_exit);
+
+MODULE_DESCRIPTION("Toshiba T7L66XB core driver");
+MODULE_LICENSE("GPL v2");
+MODULE_AUTHOR("Ian Molton");
+MODULE_ALIAS("platform:t7l66xb");
diff --git a/include/linux/mfd/t7l66xb.h b/include/linux/mfd/t7l66xb.h
new file mode 100644 (file)
index 0000000..e83c7f2
--- /dev/null
@@ -0,0 +1,36 @@
+/*
+ * This file contains the definitions for the T7L66XB
+ *
+ * (C) Copyright 2005 Ian Molton <spyro@f2s.com>
+ *
+ * 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.
+ *
+ */
+#ifndef MFD_T7L66XB_H
+#define MFD_T7L66XB_H
+
+#include <linux/mfd/core.h>
+#include <linux/mfd/tmio.h>
+
+struct t7l66xb_platform_data {
+       int (*enable_clk32k)(struct platform_device *dev);
+       void (*disable_clk32k)(struct platform_device *dev);
+       int (*enable)(struct platform_device *dev);
+       int (*disable)(struct platform_device *dev);
+       int (*suspend)(struct platform_device *dev);
+       int (*resume)(struct platform_device *dev);
+
+       int irq_base; /* The base for subdevice irqs */
+
+       struct tmio_nand_data *nand_data;
+};
+
+
+#define IRQ_T7L66XB_MMC        (1)
+#define IRQ_T7L66XB_NAND       (3)
+
+#define T7L66XB_NR_IRQS        8
+
+#endif