1 files changed, 338 insertions, 0 deletions
diff --git a/bsps/powerpc/gen5200/include/bsp/ata.h b/bsps/powerpc/gen5200/include/bsp/ata.h
new file mode 100644
index 0000000000..3d8ccfc49a
--- /dev/null
+++ b/bsps/powerpc/gen5200/include/bsp/ata.h
@@ -0,0 +1,338 @@
+/*
+ * Copyright (c) 2010-2013 embedded brains GmbH.  All rights reserved.
+ *
+ *  embedded brains GmbH
+ *  Dornierstr. 4
+ *  82178 Puchheim
+ *  Germany
+ *  <rtems@embedded-brains.de>
+ *
+ * The license and distribution terms for this file may be
+ * found in the file LICENSE in this distribution or at
+ * http://www.rtems.org/license/LICENSE.
+ */
+
+#ifndef GEN5200_ATA_H
+#define GEN5200_ATA_H
+
+#include "bestcomm.h"
+
+#include <assert.h>
+
+#include <rtems.h>
+#include <rtems/diskdevs.h>
+#include <rtems/bdbuf.h>
+
+#include <libchip/ata_internal.h>
+#include <libchip/ide_ctrl_io.h>
+#include <libchip/ide_ctrl_cfg.h>
+
+#include <libcpu/powerpc-utility.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif /* __cplusplus */
+
+#define DCTRL_SRST BSP_BBIT8(5)
+#define DCTRL_NIEN BSP_BBIT8(6)
+
+#define DAST_BSY BSP_BBIT8(0)
+#define DAST_DRDY BSP_BBIT8(1)
+#define DAST_DRQ BSP_BBIT8(4)
+#define DAST_ERR BSP_BBIT8(7)
+
+#define DST_BSY BSP_BBIT16(0)
+#define DST_DRDY BSP_BBIT16(1)
+#define DST_DRQ BSP_BBIT16(4)
+#define DST_ERR BSP_BBIT16(7)
+
+#define DDMA_HUT BSP_BBIT8(1)
+#define DDMA_FR BSP_BBIT8(2)
+#define DDMA_FE BSP_BBIT8(3)
+#define DDMA_IE BSP_BBIT8(4)
+#define DDMA_UDMA BSP_BBIT8(5)
+#define DDMA_READ BSP_BBIT8(6)
+#define DDMA_WRITE BSP_BBIT8(7)
+
+#define ATA_SECTOR_SHIFT 9
+
+#define ATA_PER_TRANSFER_SECTOR_COUNT_MAX 256
+
+typedef union {
+  struct {
+    uint8_t alternate_status;
+    uint8_t reserved_0[3];
+    uint16_t data;
+    uint8_t reserved_1[2];
+    uint8_t error;
+    uint8_t reserved_2[3];
+    uint8_t sector_count;
+    uint8_t reserved_3[3];
+    uint8_t sector;
+    uint8_t reserved_4[3];
+    uint8_t cylinder_low;
+    uint8_t reserved_5[3];
+    uint8_t cylinder_high;
+    uint8_t reserved_6[3];
+    uint8_t head;
+    uint8_t reserved_7[3];
+    uint16_t status;
+    uint8_t reserved_8[2];
+  } read;
+
+  struct {
+    uint8_t control;
+    uint8_t reserved_0[3];
+    uint16_t data;
+    uint8_t reserved_1[2];
+    uint8_t feature;
+    uint8_t reserved_2[3];
+    uint8_t sector_count;
+    uint8_t reserved_3[3];
+    uint8_t sector;
+    uint8_t reserved_4[3];
+    uint8_t cylinder_low;
+    uint8_t reserved_5[3];
+    uint8_t cylinder_high;
+    uint8_t reserved_6[3];
+    uint8_t head;
+    uint8_t reserved_7[3];
+    uint8_t command;
+    uint8_t dma_control;
+    uint8_t reserved_8[2];
+  } write;
+} ata_drive_registers;
+
+#define ATA ((volatile ata_drive_registers *) 0xf0003a5c)
+
+static inline bool ata_is_data_request(void)
+{
+  return (ATA->read.alternate_status & DAST_DRQ) != 0;
+}
+
+static inline bool ata_is_drive_ready_for_selection(void)
+{
+  return (ATA->read.alternate_status & (DAST_BSY | DAST_DRQ)) == 0;
+}
+
+static inline void ata_wait_400_nano_seconds(void)
+{
+  ATA->read.alternate_status;
+}
+
+static inline void ata_wait_for_drive_ready(void)
+{
+  while ((ATA->read.alternate_status & (DAST_BSY | DAST_DRQ | DAST_DRDY)) != DAST_DRDY) {
+    /* Wait */
+  }
+}
+
+static inline void ata_wait_for_not_busy(void)
+{
+  ata_wait_400_nano_seconds();
+
+  while ((ATA->read.alternate_status & DAST_BSY) != 0) {
+    /* Wait */
+  }
+}
+
+static inline bool ata_wait_for_data_request(void)
+{
+  ata_wait_400_nano_seconds();
+
+  uint8_t alternate_status;
+  do {
+    alternate_status = ATA->read.alternate_status;
+  } while ((alternate_status & DAST_BSY) == DAST_BSY);
+
+  return (alternate_status & (DAST_ERR | DAST_DRQ)) == DAST_DRQ;
+}
+
+static inline bool ata_check_status(void)
+{
+  return (ATA->read.status & (DST_BSY | DST_ERR)) == 0;
+}
+
+static inline void ata_clear_interrupts(void)
+{
+  ATA->read.status;
+}
+
+static inline uint8_t ata_read_or_write_sectors_command(bool read)
+{
+  return read ? 0x20 : 0x30;
+}
+
+static inline rtems_blkdev_bnum ata_max_transfer_count(rtems_blkdev_bnum sector_count)
+{
+  return sector_count > ATA_PER_TRANSFER_SECTOR_COUNT_MAX ?
+    ATA_PER_TRANSFER_SECTOR_COUNT_MAX
+      : sector_count;
+}
+
+static inline void ata_flush_sector(uint16_t *begin)
+{
+  /* XXX: The dcbi operation does not work properly */
+  rtems_cache_flush_multiple_data_lines(begin, ATA_SECTOR_SIZE);
+}
+
+void ata_reset_device(void);
+
+bool ata_set_transfer_mode(uint8_t mode);
+
+bool ata_execute_io_command(uint8_t command, uint32_t lba, uint32_t sector_count);
+
+static inline bool ata_execute_io_command_with_sg(uint8_t command, const rtems_blkdev_sg_buffer *sg)
+{
+  uint32_t lba = sg->block;
+  uint32_t sector_count = sg->length / ATA_SECTOR_SIZE;
+  return ata_execute_io_command(command, lba, sector_count);
+}
+
+typedef struct {
+  const rtems_blkdev_sg_buffer *sg;
+
+  size_t sg_count;
+
+  rtems_blkdev_bnum sg_buffer_offset_mask;
+
+  int sg_index_shift;
+} ata_sg_context;
+
+static inline void ata_sg_reset(ata_sg_context *self, const rtems_blkdev_sg_buffer *sg, size_t sg_count)
+{
+  self->sg = sg;
+  self->sg_count = sg_count;
+  uint32_t sectors_per_buffer = self->sg[0].length >> ATA_SECTOR_SHIFT;
+  self->sg_buffer_offset_mask = sectors_per_buffer - 1;
+  self->sg_index_shift = __builtin_ffs((int) sectors_per_buffer) - 1;
+}
+
+static inline void ata_sg_create_default(ata_sg_context *self)
+{
+  ata_sg_reset(self, NULL, 0);
+}
+
+static inline void ata_sg_create(ata_sg_context *self, const rtems_blkdev_sg_buffer *sg, size_t sg_count)
+{
+  ata_sg_reset(self, sg, sg_count);
+}
+
+static inline rtems_blkdev_bnum ata_sg_get_start_sector(const ata_sg_context *self)
+{
+  return self->sg[0].block;
+}
+
+static inline rtems_blkdev_bnum ata_sg_get_sector_count(const ata_sg_context *self)
+{
+  return (self->sg_buffer_offset_mask + 1) * self->sg_count;
+}
+
+static inline uint16_t *ata_sg_get_sector_data_begin(const ata_sg_context *self, rtems_blkdev_bnum relative_sector)
+{
+  uint16_t *begin = (uint16_t *)(self->sg[relative_sector >> self->sg_index_shift].buffer);
+
+  return begin + ((relative_sector & self->sg_buffer_offset_mask) << (ATA_SECTOR_SHIFT - 1));
+}
+
+static inline uint16_t *ata_sg_get_sector_data_end(const ata_sg_context *self, uint16_t *begin)
+{
+  return begin + ATA_SECTOR_SIZE / 2;
+}
+
+typedef struct {
+  rtems_id lock;
+
+  bool card_present;
+} ata_driver;
+
+void ata_driver_create(ata_driver *self, const char *device_file_path, rtems_block_device_ioctl io_control);
+
+void ata_driver_destroy(ata_driver *self);
+
+static inline void ata_driver_lock(const ata_driver *self)
+{
+  rtems_status_code sc = rtems_semaphore_obtain(self->lock, RTEMS_WAIT, RTEMS_NO_TIMEOUT);
+  assert(sc == RTEMS_SUCCESSFUL);
+}
+
+static inline void ata_driver_unlock(const ata_driver *self)
+{
+  rtems_status_code sc = rtems_semaphore_release(self->lock);
+  assert(sc == RTEMS_SUCCESSFUL);
+}
+
+static inline bool ata_driver_is_card_present(const ata_driver *self)
+{
+  return self->card_present;
+}
+
+static inline void ata_driver_io_request(
+  ata_driver *self,
+  rtems_blkdev_request *request,
+  bool (*transfer)(ata_driver *, bool, rtems_blkdev_sg_buffer *, size_t)
+)
+{
+  assert(request->req == RTEMS_BLKDEV_REQ_READ || request->req == RTEMS_BLKDEV_REQ_WRITE);
+  bool read = request->req != RTEMS_BLKDEV_REQ_WRITE;
+  rtems_blkdev_sg_buffer *sg = &request->bufs[0];
+  uint32_t sg_count = request->bufnum;
+  ata_driver_lock(self);
+  bool ok = (*transfer)(self, read, sg, sg_count);
+  ata_driver_unlock(self);
+  rtems_status_code sc = ok ? RTEMS_SUCCESSFUL : RTEMS_IO_ERROR;
+  rtems_blkdev_request_done(request, sc);
+}
+
+static inline int ata_driver_io_control(
+  rtems_disk_device *dd,
+  uint32_t cmd,
+  void *arg,
+  bool (*transfer)(ata_driver *, bool, rtems_blkdev_sg_buffer *, size_t)
+)
+{
+  ata_driver *self = (ata_driver *) rtems_disk_get_driver_data(dd);
+
+  switch (cmd) {
+    case RTEMS_BLKIO_REQUEST:
+      ata_driver_io_request(self, (rtems_blkdev_request *) arg, transfer);
+      return 0;
+    case RTEMS_BLKIO_CAPABILITIES:
+      *(uint32_t *) arg = RTEMS_BLKDEV_CAP_MULTISECTOR_CONT;
+      return 0;
+    default:
+      return rtems_blkdev_ioctl(dd, cmd, arg);
+  }
+}
+
+int ata_driver_io_control_pio_polled(
+  rtems_disk_device *dd,
+  uint32_t cmd,
+  void *arg
+);
+
+typedef struct {
+  ata_driver super;
+
+  bestcomm_task task;
+
+  bool read;
+
+  ata_sg_context sg_context;
+
+  rtems_blkdev_bnum transfer_current;
+
+  rtems_blkdev_bnum transfer_end;
+} ata_driver_dma_pio_single;
+
+void ata_driver_dma_pio_single_create(
+  ata_driver_dma_pio_single *self,
+  const char *device_file_path,
+  TaskId task_index
+);
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+
+#endif /* GEN5200_ATA_H */