3 files changed, 573 insertions, 0 deletions

diff --git a/drivers/ata/Kconfig b/drivers/ata/Kconfig
index afbd61575da6..f72b3415d75f 100644
--- a/drivers/ata/Kconfig
+++ b/drivers/ata/Kconfig
@@ -350,6 +350,15 @@ config PATA_MARVELL
 
           If unsure, say N.
 
+config PATA_MPC52xx
+        tristate "Freescale MPC52xx SoC internal IDE"
+        depends on PPC_MPC52xx
+        help
+          This option enables support for integrated IDE controller
+          of the Freescale MPC52xx SoC.
+
+          If unsure, say N.
+
 config PATA_MPIIX
         tristate "Intel PATA MPIIX support"
         depends on PCI
diff --git a/drivers/ata/Makefile b/drivers/ata/Makefile
index 50497ecc9b34..a0df15d9e4a1 100644
--- a/drivers/ata/Makefile
+++ b/drivers/ata/Makefile
@@ -39,6 +39,7 @@ obj-$(CONFIG_PATA_NETCELL)	+= pata_netcell.o
 obj-$(CONFIG_PATA_NS87410)      += pata_ns87410.o
 obj-$(CONFIG_PATA_OPTI)         += pata_opti.o
 obj-$(CONFIG_PATA_OPTIDMA)      += pata_optidma.o
+obj-$(CONFIG_PATA_MPC52xx)      += pata_mpc52xx.o
 obj-$(CONFIG_PATA_MARVELL)      += pata_marvell.o
 obj-$(CONFIG_PATA_MPIIX)        += pata_mpiix.o
 obj-$(CONFIG_PATA_OLDPIIX)      += pata_oldpiix.o
diff --git a/drivers/ata/pata_mpc52xx.c b/drivers/ata/pata_mpc52xx.c
new file mode 100644
index 000000000000..8b7019a2f190
--- /dev/null
+++ b/drivers/ata/pata_mpc52xx.c
@@ -0,0 +1,563 @@
+/*
+ * drivers/ata/pata_mpc52xx.c
+ *
+ * libata driver for the Freescale MPC52xx on-chip IDE interface
+ *
+ * Copyright (C) 2006 Sylvain Munaut <tnt@246tNt.com>
+ * Copyright (C) 2003 Mipsys - Benjamin Herrenschmidt
+ *
+ * This file is licensed under the terms of the GNU General Public License
+ * version 2. This program is licensed "as is" without any warranty of any
+ * kind, whether express or implied.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/delay.h>
+#include <linux/libata.h>
+
+#include <asm/io.h>
+#include <asm/types.h>
+#include <asm/prom.h>
+#include <asm/of_platform.h>
+#include <asm/mpc52xx.h>
+
+
+#define DRV_NAME        "mpc52xx_ata"
+#define DRV_VERSION     "0.1.0"
+
+
+/* Private structures used by the driver */
+struct mpc52xx_ata_timings {
+        u32     pio1;
+        u32     pio2;
+};
+
+struct mpc52xx_ata_priv {
+        unsigned int                    ipb_period;
+        struct mpc52xx_ata __iomem *    ata_regs;
+        int                             ata_irq;
+        struct mpc52xx_ata_timings      timings[2];
+        int                             csel;
+};
+
+
+/* ATAPI-4 PIO specs (in ns) */
+static const int ataspec_t0[5]    = {600, 383, 240, 180, 120};
+static const int ataspec_t1[5]    = { 70,  50,  30,  30,  25};
+static const int ataspec_t2_8[5]  = {290, 290, 290,  80,  70};
+static const int ataspec_t2_16[5] = {165, 125, 100,  80,  70};
+static const int ataspec_t2i[5]   = {  0,   0,   0,  70,  25};
+static const int ataspec_t4[5]    = { 30,  20,  15,  10,  10};
+static const int ataspec_ta[5]    = { 35,  35,  35,  35,  35};
+
+#define CALC_CLKCYC(c,v) ((((v)+(c)-1)/(c)))
+
+
+/* Bit definitions inside the registers */
+#define MPC52xx_ATA_HOSTCONF_SMR        0x80000000UL /* State machine reset */
+#define MPC52xx_ATA_HOSTCONF_FR         0x40000000UL /* FIFO Reset */
+#define MPC52xx_ATA_HOSTCONF_IE         0x02000000UL /* Enable interrupt in PIO */
+#define MPC52xx_ATA_HOSTCONF_IORDY      0x01000000UL /* Drive supports IORDY protocol */
+
+#define MPC52xx_ATA_HOSTSTAT_TIP        0x80000000UL /* Transaction in progress */
+#define MPC52xx_ATA_HOSTSTAT_UREP       0x40000000UL /* UDMA Read Extended Pause */
+#define MPC52xx_ATA_HOSTSTAT_RERR       0x02000000UL /* Read Error */
+#define MPC52xx_ATA_HOSTSTAT_WERR       0x01000000UL /* Write Error */
+
+#define MPC52xx_ATA_FIFOSTAT_EMPTY      0x01 /* FIFO Empty */
+
+#define MPC52xx_ATA_DMAMODE_WRITE       0x01 /* Write DMA */
+#define MPC52xx_ATA_DMAMODE_READ        0x02 /* Read DMA */
+#define MPC52xx_ATA_DMAMODE_UDMA        0x04 /* UDMA enabled */
+#define MPC52xx_ATA_DMAMODE_IE          0x08 /* Enable drive interrupt to CPU in DMA mode */
+#define MPC52xx_ATA_DMAMODE_FE          0x10 /* FIFO Flush enable in Rx mode */
+#define MPC52xx_ATA_DMAMODE_FR          0x20 /* FIFO Reset */
+#define MPC52xx_ATA_DMAMODE_HUT         0x40 /* Host UDMA burst terminate */
+
+
+/* Structure of the hardware registers */
+struct mpc52xx_ata {
+
+        /* Host interface registers */
+        u32 config;             /* ATA + 0x00 Host configuration */
+        u32 host_status;        /* ATA + 0x04 Host controller status */
+        u32 pio1;               /* ATA + 0x08 PIO Timing 1 */
+        u32 pio2;               /* ATA + 0x0c PIO Timing 2 */
+        u32 mdma1;              /* ATA + 0x10 MDMA Timing 1 */
+        u32 mdma2;              /* ATA + 0x14 MDMA Timing 2 */
+        u32 udma1;              /* ATA + 0x18 UDMA Timing 1 */
+        u32 udma2;              /* ATA + 0x1c UDMA Timing 2 */
+        u32 udma3;              /* ATA + 0x20 UDMA Timing 3 */
+        u32 udma4;              /* ATA + 0x24 UDMA Timing 4 */
+        u32 udma5;              /* ATA + 0x28 UDMA Timing 5 */
+        u32 share_cnt;          /* ATA + 0x2c ATA share counter */
+        u32 reserved0[3];
+
+        /* FIFO registers */
+        u32 fifo_data;          /* ATA + 0x3c */
+        u8  fifo_status_frame;  /* ATA + 0x40 */
+        u8  fifo_status;        /* ATA + 0x41 */
+        u16 reserved7[1];
+        u8  fifo_control;       /* ATA + 0x44 */
+        u8  reserved8[5];
+        u16 fifo_alarm;         /* ATA + 0x4a */
+        u16 reserved9;
+        u16 fifo_rdp;           /* ATA + 0x4e */
+        u16 reserved10;
+        u16 fifo_wrp;           /* ATA + 0x52 */
+        u16 reserved11;
+        u16 fifo_lfrdp;         /* ATA + 0x56 */
+        u16 reserved12;
+        u16 fifo_lfwrp;         /* ATA + 0x5a */
+
+        /* Drive TaskFile registers */
+        u8  tf_control;         /* ATA + 0x5c TASKFILE Control/Alt Status */
+        u8  reserved13[3];
+        u16 tf_data;            /* ATA + 0x60 TASKFILE Data */
+        u16 reserved14;
+        u8  tf_features;        /* ATA + 0x64 TASKFILE Features/Error */
+        u8  reserved15[3];
+        u8  tf_sec_count;       /* ATA + 0x68 TASKFILE Sector Count */
+        u8  reserved16[3];
+        u8  tf_sec_num;         /* ATA + 0x6c TASKFILE Sector Number */
+        u8  reserved17[3];
+        u8  tf_cyl_low;         /* ATA + 0x70 TASKFILE Cylinder Low */
+        u8  reserved18[3];
+        u8  tf_cyl_high;        /* ATA + 0x74 TASKFILE Cylinder High */
+        u8  reserved19[3];
+        u8  tf_dev_head;        /* ATA + 0x78 TASKFILE Device/Head */
+        u8  reserved20[3];
+        u8  tf_command;         /* ATA + 0x7c TASKFILE Command/Status */
+        u8  dma_mode;           /* ATA + 0x7d ATA Host DMA Mode configuration */
+        u8  reserved21[2];
+};
+
+
+/* ======================================================================== */
+/* Aux fns                                                                  */
+/* ======================================================================== */
+
+
+/* MPC52xx low level hw control */
+
+static int
+mpc52xx_ata_compute_pio_timings(struct mpc52xx_ata_priv *priv, int dev, int pio)
+{
+        struct mpc52xx_ata_timings *timing = &priv->timings[dev];
+        unsigned int ipb_period = priv->ipb_period;
+        unsigned int t0, t1, t2_8, t2_16, t2i, t4, ta;
+
+        if ((pio<0) || (pio>4))
+                return -EINVAL;
+
+        t0      = CALC_CLKCYC(ipb_period, 1000 * ataspec_t0[pio]);
+        t1      = CALC_CLKCYC(ipb_period, 1000 * ataspec_t1[pio]);
+        t2_8    = CALC_CLKCYC(ipb_period, 1000 * ataspec_t2_8[pio]);
+        t2_16   = CALC_CLKCYC(ipb_period, 1000 * ataspec_t2_16[pio]);
+        t2i     = CALC_CLKCYC(ipb_period, 1000 * ataspec_t2i[pio]);
+        t4      = CALC_CLKCYC(ipb_period, 1000 * ataspec_t4[pio]);
+        ta      = CALC_CLKCYC(ipb_period, 1000 * ataspec_ta[pio]);
+
+        timing->pio1 = (t0 << 24) | (t2_8 << 16) | (t2_16 << 8) | (t2i);
+        timing->pio2 = (t4 << 24) | (t1 << 16) | (ta << 8);
+
+        return 0;
+}
+
+static void
+mpc52xx_ata_apply_timings(struct mpc52xx_ata_priv *priv, int device)
+{
+        struct mpc52xx_ata __iomem *regs = priv->ata_regs;
+        struct mpc52xx_ata_timings *timing = &priv->timings[device];
+
+        out_be32(&regs->pio1,  timing->pio1);
+        out_be32(&regs->pio2,  timing->pio2);
+        out_be32(&regs->mdma1, 0);
+        out_be32(&regs->mdma2, 0);
+        out_be32(&regs->udma1, 0);
+        out_be32(&regs->udma2, 0);
+        out_be32(&regs->udma3, 0);
+        out_be32(&regs->udma4, 0);
+        out_be32(&regs->udma5, 0);
+
+        priv->csel = device;
+}
+
+static int
+mpc52xx_ata_hw_init(struct mpc52xx_ata_priv *priv)
+{
+        struct mpc52xx_ata __iomem *regs = priv->ata_regs;
+        int tslot;
+
+        /* Clear share_cnt (all sample code do this ...) */
+        out_be32(&regs->share_cnt, 0);
+
+        /* Configure and reset host */
+        out_be32(&regs->config,
+                        MPC52xx_ATA_HOSTCONF_IE |
+                        MPC52xx_ATA_HOSTCONF_IORDY |
+                        MPC52xx_ATA_HOSTCONF_SMR |
+                        MPC52xx_ATA_HOSTCONF_FR);
+
+        udelay(10);
+
+        out_be32(&regs->config,
+                        MPC52xx_ATA_HOSTCONF_IE |
+                        MPC52xx_ATA_HOSTCONF_IORDY);
+
+        /* Set the time slot to 1us */
+        tslot = CALC_CLKCYC(priv->ipb_period, 1000000);
+        out_be32(&regs->share_cnt, tslot << 16 );
+
+        /* Init timings to PIO0 */
+        memset(priv->timings, 0x00, 2*sizeof(struct mpc52xx_ata_timings));
+
+        mpc52xx_ata_compute_pio_timings(priv, 0, 0);
+        mpc52xx_ata_compute_pio_timings(priv, 1, 0);
+
+        mpc52xx_ata_apply_timings(priv, 0);
+
+        return 0;
+}
+
+
+/* ======================================================================== */
+/* libata driver                                                            */
+/* ======================================================================== */
+
+static void
+mpc52xx_ata_set_piomode(struct ata_port *ap, struct ata_device *adev)
+{
+        struct mpc52xx_ata_priv *priv = ap->host->private_data;
+        int pio, rv;
+
+        pio = adev->pio_mode - XFER_PIO_0;
+
+        rv = mpc52xx_ata_compute_pio_timings(priv, adev->devno, pio);
+
+        if (rv) {
+                printk(KERN_ERR DRV_NAME
+                        ": Trying to select invalid PIO mode %d\n", pio);
+                return;
+        }
+
+        mpc52xx_ata_apply_timings(priv, adev->devno);
+}
+static void
+mpc52xx_ata_dev_select(struct ata_port *ap, unsigned int device)
+{
+        struct mpc52xx_ata_priv *priv = ap->host->private_data;
+
+        if (device != priv->csel)
+                mpc52xx_ata_apply_timings(priv, device);
+
+        ata_std_dev_select(ap,device);
+}
+
+static void
+mpc52xx_ata_error_handler(struct ata_port *ap)
+{
+        ata_bmdma_drive_eh(ap, ata_std_prereset, ata_std_softreset, NULL,
+                        ata_std_postreset);
+}
+
+
+
+static struct scsi_host_template mpc52xx_ata_sht = {
+        .module                 = THIS_MODULE,
+        .name                   = DRV_NAME,
+        .ioctl                  = ata_scsi_ioctl,
+        .queuecommand           = ata_scsi_queuecmd,
+        .can_queue              = ATA_DEF_QUEUE,
+        .this_id                = ATA_SHT_THIS_ID,
+        .sg_tablesize           = LIBATA_MAX_PRD,
+        .max_sectors            = ATA_MAX_SECTORS,
+        .cmd_per_lun            = ATA_SHT_CMD_PER_LUN,
+        .emulated               = ATA_SHT_EMULATED,
+        .use_clustering         = ATA_SHT_USE_CLUSTERING,
+        .proc_name              = DRV_NAME,
+        .dma_boundary           = ATA_DMA_BOUNDARY,
+        .slave_configure        = ata_scsi_slave_config,
+        .bios_param             = ata_std_bios_param,
+};
+
+static struct ata_port_operations mpc52xx_ata_port_ops = {
+        .port_disable           = ata_port_disable,
+        .set_piomode            = mpc52xx_ata_set_piomode,
+        .dev_select             = mpc52xx_ata_dev_select,
+        .tf_load                = ata_tf_load,
+        .tf_read                = ata_tf_read,
+        .check_status           = ata_check_status,
+        .exec_command           = ata_exec_command,
+        .freeze                 = ata_bmdma_freeze,
+        .thaw                   = ata_bmdma_thaw,
+        .error_handler          = mpc52xx_ata_error_handler,
+        .qc_prep                = ata_qc_prep,
+        .qc_issue               = ata_qc_issue_prot,
+        .data_xfer              = ata_mmio_data_xfer,
+        .irq_handler            = ata_interrupt,
+        .irq_clear              = ata_bmdma_irq_clear,
+        .port_start             = ata_port_start,
+        .port_stop              = ata_port_stop,
+        .host_stop              = ata_host_stop,
+};
+
+static struct ata_probe_ent mpc52xx_ata_probe_ent = {
+        .port_ops       = &mpc52xx_ata_port_ops,
+        .sht            = &mpc52xx_ata_sht,
+        .n_ports        = 1,
+        .pio_mask       = 0x1f,         /* Up to PIO4 */
+        .mwdma_mask     = 0x00,         /* No MWDMA   */
+        .udma_mask      = 0x00,         /* No UDMA    */
+        .port_flags     = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST | ATA_FLAG_MMIO,
+        .irq_flags      = 0,
+};
+
+static int __devinit
+mpc52xx_ata_init_one(struct device *dev, struct mpc52xx_ata_priv *priv)
+{
+        struct ata_probe_ent *ae = &mpc52xx_ata_probe_ent;
+        struct ata_ioports *aio = &ae->port[0];
+        int rv;
+
+        INIT_LIST_HEAD(&ae->node);
+        ae->dev = dev;
+        ae->irq = priv->ata_irq;
+
+        aio->cmd_addr           = 0;    /* Don't have a classic reg block */
+        aio->altstatus_addr     = (unsigned long)&priv->ata_regs->tf_control;
+        aio->ctl_addr           = (unsigned long)&priv->ata_regs->tf_control;
+        aio->data_addr          = (unsigned long)&priv->ata_regs->tf_data;
+        aio->error_addr         = (unsigned long)&priv->ata_regs->tf_features;
+        aio->feature_addr       = (unsigned long)&priv->ata_regs->tf_features;
+        aio->nsect_addr         = (unsigned long)&priv->ata_regs->tf_sec_count;
+        aio->lbal_addr          = (unsigned long)&priv->ata_regs->tf_sec_num;
+        aio->lbam_addr          = (unsigned long)&priv->ata_regs->tf_cyl_low;
+        aio->lbah_addr          = (unsigned long)&priv->ata_regs->tf_cyl_high;
+        aio->device_addr        = (unsigned long)&priv->ata_regs->tf_dev_head;
+        aio->status_addr        = (unsigned long)&priv->ata_regs->tf_command;
+        aio->command_addr       = (unsigned long)&priv->ata_regs->tf_command;
+
+        ae->private_data = priv;
+
+        rv = ata_device_add(ae);
+
+        return rv ? 0 : -EINVAL;
+}
+
+static struct mpc52xx_ata_priv *
+mpc52xx_ata_remove_one(struct device *dev)
+{
+        struct ata_host *host = dev_get_drvdata(dev);
+        struct mpc52xx_ata_priv *priv = host->private_data;
+
+        ata_host_remove(host);
+
+        return priv;
+}
+
+
+/* ======================================================================== */
+/* OF Platform driver                                                       */
+/* ======================================================================== */
+
+static int __devinit
+mpc52xx_ata_probe(struct of_device *op, const struct of_device_id *match)
+{
+        unsigned int ipb_freq;
+        struct resource res_mem;
+        int ata_irq = NO_IRQ;
+        struct mpc52xx_ata __iomem *ata_regs = NULL;
+        struct mpc52xx_ata_priv *priv = NULL;
+        int rv;
+
+        /* Get ipb frequency */
+        ipb_freq = mpc52xx_find_ipb_freq(op->node);
+        if (!ipb_freq) {
+                printk(KERN_ERR DRV_NAME ": "
+                        "Unable to find IPB Bus frequency\n" );
+                return -ENODEV;
+        }
+
+        /* Get IRQ and register */
+        rv = of_address_to_resource(op->node, 0, &res_mem);
+        if (rv) {
+                printk(KERN_ERR DRV_NAME ": "
+                        "Error while parsing device node resource\n" );
+                return rv;
+        }
+
+        ata_irq = irq_of_parse_and_map(op->node, 0);
+        if (ata_irq == NO_IRQ) {
+                printk(KERN_ERR DRV_NAME ": "
+                        "Error while mapping the irq\n");
+                return -EINVAL;
+        }
+
+        /* Request mem region */
+        if (!request_mem_region(res_mem.start,
+                                sizeof(struct mpc52xx_ata), DRV_NAME)) {
+                printk(KERN_ERR DRV_NAME ": "
+                        "Error while requesting mem region\n");
+                irq_dispose_mapping(ata_irq);
+                return -EBUSY;
+        }
+
+        /* Remap registers */
+        ata_regs = ioremap(res_mem.start, sizeof(struct mpc52xx_ata));
+        if (!ata_regs) {
+                printk(KERN_ERR DRV_NAME ": "
+                        "Error while mapping register set\n");
+                rv = -ENOMEM;
+                goto err;
+        }
+
+        /* Prepare our private structure */
+        priv = kmalloc(sizeof(struct mpc52xx_ata_priv), GFP_ATOMIC);
+        if (!priv) {
+                printk(KERN_ERR DRV_NAME ": "
+                        "Error while allocating private structure\n");
+                rv = -ENOMEM;
+                goto err;
+        }
+
+        priv->ipb_period = 1000000000 / (ipb_freq / 1000);
+        priv->ata_regs = ata_regs;
+        priv->ata_irq = ata_irq;
+        priv->csel = -1;
+
+        /* Init the hw */
+        rv = mpc52xx_ata_hw_init(priv);
+        if (rv) {
+                printk(KERN_ERR DRV_NAME ": Error during HW init\n");
+                goto err;
+        }
+
+        /* Register ourselves to libata */
+        rv = mpc52xx_ata_init_one(&op->dev, priv);
+        if (rv) {
+                printk(KERN_ERR DRV_NAME ": "
+                        "Error while registering to ATA layer\n");
+                return rv;
+        }
+
+        /* Done */
+        return 0;
+
+        /* Error path */
+err:
+        kfree(priv);
+
+        if (ata_regs)
+                iounmap(ata_regs);
+
+        release_mem_region(res_mem.start, sizeof(struct mpc52xx_ata));
+
+        irq_dispose_mapping(ata_irq);
+
+        return rv;
+}
+
+static int
+mpc52xx_ata_remove(struct of_device *op)
+{
+        struct mpc52xx_ata_priv *priv;
+        struct resource res_mem;
+        int rv;
+
+        /* Unregister */
+        priv = mpc52xx_ata_remove_one(&op->dev);
+
+        /* Free everything */
+        iounmap(priv->ata_regs);
+
+        rv = of_address_to_resource(op->node, 0, &res_mem);
+        if (rv) {
+                printk(KERN_ERR DRV_NAME ": "
+                        "Error while parsing device node resource\n");
+                printk(KERN_ERR DRV_NAME ": "
+                        "Zone may not be properly released\n");
+        } else
+                release_mem_region(res_mem.start, sizeof(struct mpc52xx_ata));
+
+        irq_dispose_mapping(priv->ata_irq);
+
+        kfree(priv);
+
+        return 0;
+}
+
+
+#ifdef CONFIG_PM
+
+static int
+mpc52xx_ata_suspend(struct of_device *op, pm_message_t state)
+{
+        return 0;       /* FIXME : What to do here ? */
+}
+
+static int
+mpc52xx_ata_resume(struct of_device *op)
+{
+        return 0;       /* FIXME : What to do here ? */
+}
+
+#endif
+
+
+static struct of_device_id mpc52xx_ata_of_match[] = {
+        {
+                .compatible = "mpc5200-ata",
+        },
+        {
+                .compatible = "mpc52xx-ata",
+        },
+        {},
+};
+
+
+static struct of_platform_driver mpc52xx_ata_of_platform_driver = {
+        .owner          = THIS_MODULE,
+        .name           = DRV_NAME,
+        .match_table    = mpc52xx_ata_of_match,
+        .probe          = mpc52xx_ata_probe,
+        .remove         = mpc52xx_ata_remove,
+#ifdef CONFIG_PM
+        .suspend        = mpc52xx_ata_suspend,
+        .resume         = mpc52xx_ata_resume,
+#endif
+        .driver         = {
+                .name   = DRV_NAME,
+                .owner  = THIS_MODULE,
+        },
+};
+
+
+/* ======================================================================== */
+/* Module                                                                   */
+/* ======================================================================== */
+
+static int __init
+mpc52xx_ata_init(void)
+{
+        printk(KERN_INFO "ata: MPC52xx IDE/ATA libata driver\n");
+        return of_register_platform_driver(&mpc52xx_ata_of_platform_driver);
+}
+
+static void __exit
+mpc52xx_ata_exit(void)
+{
+        of_unregister_platform_driver(&mpc52xx_ata_of_platform_driver);
+}
+
+module_init(mpc52xx_ata_init);
+module_exit(mpc52xx_ata_exit);
+
+MODULE_AUTHOR("Sylvain Munaut <tnt@246tNt.com>");
+MODULE_DESCRIPTION("Freescale MPC52xx IDE/ATA libata driver");
+MODULE_LICENSE("GPL");
+MODULE_DEVICE_TABLE(of, mpc52xx_ata_of_match);
+MODULE_VERSION(DRV_VERSION);
+