platform/msm_shared/include/uart_dm.h

/* Copyright (c) 2010, Code Aurora Forum. All rights reserved.

 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *   * Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *   * Redistributions in binary form must reproduce the above
 *     copyright notice, this list of conditions and the following
 *     disclaimer in the documentation and/or other materials provided
 *     with the distribution.
 *   * Neither the name of Code Aurora Forum, Inc. nor the names of its
 *     contributors may be used to endorse or promote products derived
 *     from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
 * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
 * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#ifndef __UART_DM_H__
#define __UART_DM_H__

#include <platform/iomap.h>

#define MSM_BOOT_UART_DM_EXTR_BITS(value, start_pos, end_pos) \
                                             ((value << (32 - end_pos))\
                                              >> (32 - (end_pos - start_pos)))


/* UART Parity Mode */
enum MSM_BOOT_UART_DM_PARITY_MODE
{
    MSM_BOOT_UART_DM_NO_PARITY,
    MSM_BOOT_UART_DM_ODD_PARITY,
    MSM_BOOT_UART_DM_EVEN_PARITY,
    MSM_BOOT_UART_DM_SPACE_PARITY
};

/* UART Stop Bit Length */
enum MSM_BOOT_UART_DM_STOP_BIT_LEN
{
    MSM_BOOT_UART_DM_SBL_9_16,
    MSM_BOOT_UART_DM_SBL_1,
    MSM_BOOT_UART_DM_SBL_1_9_16,
    MSM_BOOT_UART_DM_SBL_2
};

/* UART Bits per Char */
enum MSM_BOOT_UART_DM_BITS_PER_CHAR
{
    MSM_BOOT_UART_DM_5_BPS,
    MSM_BOOT_UART_DM_6_BPS,
    MSM_BOOT_UART_DM_7_BPS,
    MSM_BOOT_UART_DM_8_BPS
};

/* 8-N-1 Configuration */
#define MSM_BOOT_UART_DM_8_N_1_MODE          (MSM_BOOT_UART_DM_NO_PARITY | \
                                             (MSM_BOOT_UART_DM_SBL_1 << 2) | \
                                             (MSM_BOOT_UART_DM_8_BPS << 4))

/* UART_DM Registers */

/* UART Operational Mode Register */
#define MSM_BOOT_UART_DM_MR1(id)             (GSBI_UART_DM_BASE(id) + 0x00)
#define MSM_BOOT_UART_DM_MR2(id)             (GSBI_UART_DM_BASE(id) + 0x04)
#define MSM_BOOT_UART_DM_RXBRK_ZERO_CHAR_OFF (1 << 8)
#define MSM_BOOT_UART_DM_LOOPBACK            (1 << 7)

/* UART Clock Selection Register */
#define MSM_BOOT_UART_DM_CSR(id)             (GSBI_UART_DM_BASE(id) + 0x08)

/* UART DM TX FIFO Registers - 4 */
#define MSM_BOOT_UART_DM_TF(id, x)         (GSBI_UART_DM_BASE(id) + 0x70+(4*(x)))

/* UART Command Register */
#define MSM_BOOT_UART_DM_CR(id)              (GSBI_UART_DM_BASE(id) + 0x10)
#define MSM_BOOT_UART_DM_CR_RX_ENABLE        (1 << 0)
#define MSM_BOOT_UART_DM_CR_RX_DISABLE       (1 << 1)
#define MSM_BOOT_UART_DM_CR_TX_ENABLE        (1 << 2)
#define MSM_BOOT_UART_DM_CR_TX_DISABLE       (1 << 3)

/* UART Channel Command */
#define MSM_BOOT_UART_DM_CR_CH_CMD_LSB(x)    ((x & 0x0f) << 4)
#define MSM_BOOT_UART_DM_CR_CH_CMD_MSB(x)    ((x >> 4 ) << 11 )
#define MSM_BOOT_UART_DM_CR_CH_CMD(x)        (MSM_BOOT_UART_DM_CR_CH_CMD_LSB(x) | \
                                              MSM_BOOT_UART_DM_CR_CH_CMD_MSB(x))
#define MSM_BOOT_UART_DM_CMD_NULL            MSM_BOOT_UART_DM_CR_CH_CMD(0)
#define MSM_BOOT_UART_DM_CMD_RESET_RX        MSM_BOOT_UART_DM_CR_CH_CMD(1)
#define MSM_BOOT_UART_DM_CMD_RESET_TX        MSM_BOOT_UART_DM_CR_CH_CMD(2)
#define MSM_BOOT_UART_DM_CMD_RESET_ERR_STAT  MSM_BOOT_UART_DM_CR_CH_CMD(3)
#define MSM_BOOT_UART_DM_CMD_RES_BRK_CHG_INT MSM_BOOT_UART_DM_CR_CH_CMD(4)
#define MSM_BOOT_UART_DM_CMD_START_BRK       MSM_BOOT_UART_DM_CR_CH_CMD(5)
#define MSM_BOOT_UART_DM_CMD_STOP_BRK        MSM_BOOT_UART_DM_CR_CH_CMD(6)
#define MSM_BOOT_UART_DM_CMD_RES_CTS_N       MSM_BOOT_UART_DM_CR_CH_CMD(7)
#define MSM_BOOT_UART_DM_CMD_RES_STALE_INT   MSM_BOOT_UART_DM_CR_CH_CMD(8)
#define MSM_BOOT_UART_DM_CMD_PACKET_MODE     MSM_BOOT_UART_DM_CR_CH_CMD(9)
#define MSM_BOOT_UART_DM_CMD_MODE_RESET      MSM_BOOT_UART_DM_CR_CH_CMD(C)
#define MSM_BOOT_UART_DM_CMD_SET_RFR_N       MSM_BOOT_UART_DM_CR_CH_CMD(D)
#define MSM_BOOT_UART_DM_CMD_RES_RFR_N       MSM_BOOT_UART_DM_CR_CH_CMD(E)
#define MSM_BOOT_UART_DM_CMD_RES_TX_ERR      MSM_BOOT_UART_DM_CR_CH_CMD(10)
#define MSM_BOOT_UART_DM_CMD_CLR_TX_DONE     MSM_BOOT_UART_DM_CR_CH_CMD(11)
#define MSM_BOOT_UART_DM_CMD_RES_BRKSTRT_INT MSM_BOOT_UART_DM_CR_CH_CMD(12)
#define MSM_BOOT_UART_DM_CMD_RES_BRKEND_INT  MSM_BOOT_UART_DM_CR_CH_CMD(13)
#define MSM_BOOT_UART_DM_CMD_RES_PER_FRM_INT MSM_BOOT_UART_DM_CR_CH_CMD(14)

/*UART General Command */
#define MSM_BOOT_UART_DM_CR_GENERAL_CMD(x)   ((x) << 8)

#define MSM_BOOT_UART_DM_GCMD_NULL            MSM_BOOT_UART_DM_CR_GENERAL_CMD(0)
#define MSM_BOOT_UART_DM_GCMD_CR_PROT_EN      MSM_BOOT_UART_DM_CR_GENERAL_CMD(1)
#define MSM_BOOT_UART_DM_GCMD_CR_PROT_DIS     MSM_BOOT_UART_DM_CR_GENERAL_CMD(2)
#define MSM_BOOT_UART_DM_GCMD_RES_TX_RDY_INT  MSM_BOOT_UART_DM_CR_GENERAL_CMD(3)
#define MSM_BOOT_UART_DM_GCMD_SW_FORCE_STALE  MSM_BOOT_UART_DM_CR_GENERAL_CMD(4)
#define MSM_BOOT_UART_DM_GCMD_ENA_STALE_EVT   MSM_BOOT_UART_DM_CR_GENERAL_CMD(5)
#define MSM_BOOT_UART_DM_GCMD_DIS_STALE_EVT   MSM_BOOT_UART_DM_CR_GENERAL_CMD(6)

/* UART Interrupt Mask Register */
#define MSM_BOOT_UART_DM_IMR(id)             (GSBI_UART_DM_BASE(id) + 0x14)
#define MSM_BOOT_UART_DM_TXLEV               (1 << 0)
#define MSM_BOOT_UART_DM_RXHUNT              (1 << 1)
#define MSM_BOOT_UART_DM_RXBRK_CHNG          (1 << 2)
#define MSM_BOOT_UART_DM_RXSTALE             (1 << 3)
#define MSM_BOOT_UART_DM_RXLEV               (1 << 4)
#define MSM_BOOT_UART_DM_DELTA_CTS           (1 << 5)
#define MSM_BOOT_UART_DM_CURRENT_CTS         (1 << 6)
#define MSM_BOOT_UART_DM_TX_READY            (1 << 7)
#define MSM_BOOT_UART_DM_TX_ERROR            (1 << 8)
#define MSM_BOOT_UART_DM_TX_DONE             (1 << 9)
#define MSM_BOOT_UART_DM_RXBREAK_START       (1 << 10)
#define MSM_BOOT_UART_DM_RXBREAK_END         (1 << 11)
#define MSM_BOOT_UART_DM_PAR_FRAME_ERR_IRQ   (1 << 12)

#define MSM_BOOT_UART_DM_IMR_ENABLED         (MSM_BOOT_UART_DM_TX_READY | \
                                              MSM_BOOT_UART_DM_TXLEV    | \
                                              MSM_BOOT_UART_DM_RXLEV    | \
                                              MSM_BOOT_UART_DM_RXSTALE)

/* UART Interrupt Programming Register */
#define MSM_BOOT_UART_DM_IPR(id)             (GSBI_UART_DM_BASE(id) + 0x18)
#define MSM_BOOT_UART_DM_STALE_TIMEOUT_LSB   0x0f
#define MSM_BOOT_UART_DM_STALE_TIMEOUT_MSB   0  /* Not used currently */

/* UART Transmit/Receive FIFO Watermark Register */
#define MSM_BOOT_UART_DM_TFWR(id)            (GSBI_UART_DM_BASE(id) + 0x1C)
/* Interrupt is generated when FIFO level is less than or equal to this value */
#define MSM_BOOT_UART_DM_TFW_VALUE           0

#define MSM_BOOT_UART_DM_RFWR(id)            (GSBI_UART_DM_BASE(id) + 0x20)
/*Interrupt generated when no of words in RX FIFO is greater than this value */
#define MSM_BOOT_UART_DM_RFW_VALUE           0

/* UART Hunt Character Register */
#define MSM_BOOT_UART_DM_HCR(id)             (GSBI_UART_DM_BASE(id) + 0x24)

/* Used for RX transfer initialization */
#define MSM_BOOT_UART_DM_DMRX(id)            (GSBI_UART_DM_BASE(id) + 0x34)

/* Default DMRX value - any value bigger than FIFO size would be fine */
#define MSM_BOOT_UART_DM_DMRX_DEF_VALUE    0x220

/* Register to enable IRDA function */
#define MSM_BOOT_UART_DM_IRDA(id)            (GSBI_UART_DM_BASE(id) + 0x38)

/* UART Data Mover Enable Register */
#define MSM_BOOT_UART_DM_DMEN(id)            (GSBI_UART_DM_BASE(id) + 0x3C)

/* Number of characters for Transmission */
#define MSM_BOOT_UART_DM_NO_CHARS_FOR_TX(id) (GSBI_UART_DM_BASE(id) + 0x040)

/* UART RX FIFO Base Address */
#define MSM_BOOT_UART_DM_BADR(id)            (GSBI_UART_DM_BASE(id) + 0x44)

/* UART Status Register */
#define MSM_BOOT_UART_DM_SR(id)              (GSBI_UART_DM_BASE(id) + 0x008)
#define MSM_BOOT_UART_DM_SR_RXRDY            (1 << 0)
#define MSM_BOOT_UART_DM_SR_RXFULL           (1 << 1)
#define MSM_BOOT_UART_DM_SR_TXRDY            (1 << 2)
#define MSM_BOOT_UART_DM_SR_TXEMT            (1 << 3)
#define MSM_BOOT_UART_DM_SR_UART_OVERRUN     (1 << 4)
#define MSM_BOOT_UART_DM_SR_PAR_FRAME_ERR    (1 << 5)
#define MSM_BOOT_UART_DM_RX_BREAK            (1 << 6)
#define MSM_BOOT_UART_DM_HUNT_CHAR           (1 << 7)
#define MSM_BOOT_UART_DM_RX_BRK_START_LAST   (1 << 8)

/* UART Receive FIFO Registers - 4 in numbers */
#define MSM_BOOT_UART_DM_RF(id, x)      (GSBI_UART_DM_BASE(id) + 0x70 + (4*(x)))

/* UART Masked Interrupt Status Register */
#define MSM_BOOT_UART_DM_MISR(id)         (GSBI_UART_DM_BASE(id) + 0x10)

/* UART Interrupt Status Register */
#define MSM_BOOT_UART_DM_ISR(id)          (GSBI_UART_DM_BASE(id) + 0x14)

/* Number of characters received since the end of last RX transfer */
#define MSM_BOOT_UART_DM_RX_TOTAL_SNAP(id)  (GSBI_UART_DM_BASE(id) + 0x38)

/* UART TX FIFO Status Register */
#define MSM_BOOT_UART_DM_TXFS(id)           (GSBI_UART_DM_BASE(id) + 0x4C)
#define MSM_BOOT_UART_DM_TXFS_STATE_LSB(x)   MSM_BOOT_UART_DM_EXTR_BITS(x,0,6)
#define MSM_BOOT_UART_DM_TXFS_STATE_MSB(x)   MSM_BOOT_UART_DM_EXTR_BITS(x,14,31)
#define MSM_BOOT_UART_DM_TXFS_BUF_STATE(x)   MSM_BOOT_UART_DM_EXTR_BITS(x,7,9)
#define MSM_BOOT_UART_DM_TXFS_ASYNC_STATE(x) MSM_BOOT_UART_DM_EXTR_BITS(x,10,13)

/* UART RX FIFO Status Register */
#define MSM_BOOT_UART_DM_RXFS(id)           (GSBI_UART_DM_BASE(id) + 0x50)
#define MSM_BOOT_UART_DM_RXFS_STATE_LSB(x)   MSM_BOOT_UART_DM_EXTR_BITS(x,0,6)
#define MSM_BOOT_UART_DM_RXFS_STATE_MSB(x)   MSM_BOOT_UART_DM_EXTR_BITS(x,14,31)
#define MSM_BOOT_UART_DM_RXFS_BUF_STATE(x)   MSM_BOOT_UART_DM_EXTR_BITS(x,7,9)
#define MSM_BOOT_UART_DM_RXFS_ASYNC_STATE(x) MSM_BOOT_UART_DM_EXTR_BITS(x,10,13)



/* Macros for Common Errors */
#define MSM_BOOT_UART_DM_E_SUCCESS           0
#define MSM_BOOT_UART_DM_E_FAILURE           1
#define MSM_BOOT_UART_DM_E_TIMEOUT           2
#define MSM_BOOT_UART_DM_E_INVAL             3
#define MSM_BOOT_UART_DM_E_MALLOC_FAIL       4
#define MSM_BOOT_UART_DM_E_RX_NOT_READY      5

void uart_init(uint8_t gsbi_id);
#endif /* __UART_DM_H__*/