mcpdm.h

/*
 * mcpdm.h -- Defines for McPDM driver
 *
 * Author: Jorge Eduardo Candelaria <[email protected]>
 *
 * 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 program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA
 *
 */

/* McPDM registers */

#define MCPDM_REVISION         0x00
#define MCPDM_SYSCONFIG                0x10
#define MCPDM_IRQSTATUS_RAW    0x24
#define MCPDM_IRQSTATUS                0x28
#define MCPDM_IRQENABLE_SET    0x2C
#define MCPDM_IRQENABLE_CLR    0x30
#define MCPDM_IRQWAKE_EN       0x34
#define MCPDM_DMAENABLE_SET    0x38
#define MCPDM_DMAENABLE_CLR    0x3C
#define MCPDM_DMAWAKEEN                0x40
#define MCPDM_CTRL             0x44
#define MCPDM_DN_DATA          0x48
#define MCPDM_UP_DATA          0x4C
#define MCPDM_FIFO_CTRL_DN     0x50
#define MCPDM_FIFO_CTRL_UP     0x54
#define MCPDM_DN_OFFSET                0x58

/*
 * MCPDM_IRQ bit fields
 * IRQSTATUS_RAW, IRQSTATUS, IRQENABLE_SET, IRQENABLE_CLR
 */

#define MCPDM_DN_IRQ                   (1 << 0)
#define MCPDM_DN_IRQ_EMPTY             (1 << 1)
#define MCPDM_DN_IRQ_ALMST_EMPTY       (1 << 2)
#define MCPDM_DN_IRQ_FULL              (1 << 3)

#define MCPDM_UP_IRQ                   (1 << 8)
#define MCPDM_UP_IRQ_EMPTY             (1 << 9)
#define MCPDM_UP_IRQ_ALMST_FULL                (1 << 10)
#define MCPDM_UP_IRQ_FULL              (1 << 11)

#define MCPDM_DOWNLINK_IRQ_MASK                0x00F
#define MCPDM_UPLINK_IRQ_MASK          0xF00

/*
 * MCPDM_DMAENABLE bit fields
 */

#define DMA_DN_ENABLE          0x1
#define DMA_UP_ENABLE          0x2

/*
 * MCPDM_CTRL bit fields
 */

#define PDM_UP1_EN             0x0001
#define PDM_UP2_EN             0x0002
#define PDM_UP3_EN             0x0004
#define PDM_DN1_EN             0x0008
#define PDM_DN2_EN             0x0010
#define PDM_DN3_EN             0x0020
#define PDM_DN4_EN             0x0040
#define PDM_DN5_EN             0x0080
#define PDMOUTFORMAT           0x0100
#define CMD_INT                        0x0200
#define STATUS_INT             0x0400
#define SW_UP_RST              0x0800
#define SW_DN_RST              0x1000
#define PDM_UP_MASK            0x007
#define PDM_DN_MASK            0x0F8
#define PDM_CMD_MASK           0x200
#define PDM_STATUS_MASK                0x400


#define PDMOUTFORMAT_LJUST     (0 << 8)
#define PDMOUTFORMAT_RJUST     (1 << 8)

/*
 * MCPDM_FIFO_CTRL bit fields
 */

#define UP_THRES_MAX           0xF
#define DN_THRES_MAX           0xF

/*
 * MCPDM_DN_OFFSET bit fields
 */

#define DN_OFST_RX1_EN         0x0001
#define DN_OFST_RX2_EN         0x0100

#define DN_OFST_RX1            1
#define DN_OFST_RX2            9
#define DN_OFST_MAX            0x1F

#define MCPDM_UPLINK           1
#define MCPDM_DOWNLINK         2

struct omap_mcpdm_link {
       int irq_mask;
       int threshold;
       int format;
       int channels;
};

struct omap_mcpdm_platform_data {
       unsigned long phys_base;
       u16 irq;
};

struct omap_mcpdm {
       struct device *dev;
       unsigned long phys_base;
       void __iomem *io_base;
       u8 free;
       int irq;

       spinlock_t lock;
       struct omap_mcpdm_platform_data *pdata;
       struct clk *clk;
       struct omap_mcpdm_link *downlink;
       struct omap_mcpdm_link *uplink;
       struct completion irq_completion;

       int dn_channels;
       int up_channels;
};

extern void omap_mcpdm_start(int stream);
extern void omap_mcpdm_stop(int stream);
extern int omap_mcpdm_capture_open(struct omap_mcpdm_link *uplink);
extern int omap_mcpdm_playback_open(struct omap_mcpdm_link *downlink);
extern int omap_mcpdm_capture_close(struct omap_mcpdm_link *uplink);
extern int omap_mcpdm_playback_close(struct omap_mcpdm_link *downlink);
extern int omap_mcpdm_request(void);
extern void omap_mcpdm_free(void);
extern int omap_mcpdm_set_offset(int offset1, int offset2);
int __devinit omap_mcpdm_probe(struct platform_device *pdev);
int __devexit omap_mcpdm_remove(struct platform_device *pdev);