ASoC: Ux500: Add MSP I2S-driver
Add driver for running I2S with the MSP-block.
Signed-off-by: Ola Lilja <ola.o.lilja@stericsson.com>
[Fixed trailing whitespace -- broonie]
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
diff --git a/sound/soc/ux500/ux500_msp_i2s.c b/sound/soc/ux500/ux500_msp_i2s.c
new file mode 100644
index 0000000..496dec1
--- /dev/null
+++ b/sound/soc/ux500/ux500_msp_i2s.c
@@ -0,0 +1,742 @@
+/*
+ * Copyright (C) ST-Ericsson SA 2012
+ *
+ * Author: Ola Lilja <ola.o.lilja@stericsson.com>,
+ * Roger Nilsson <roger.xr.nilsson@stericsson.com>,
+ * Sandeep Kaushik <sandeep.kaushik@st.com>
+ * for ST-Ericsson.
+ *
+ * License terms:
+ *
+ * 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.
+ */
+
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/delay.h>
+#include <linux/slab.h>
+
+#include <mach/hardware.h>
+#include <mach/board-mop500-msp.h>
+
+#include <sound/soc.h>
+
+#include "ux500_msp_i2s.h"
+
+ /* Protocol desciptors */
+static const struct msp_protdesc prot_descs[] = {
+ { /* I2S */
+ MSP_SINGLE_PHASE,
+ MSP_SINGLE_PHASE,
+ MSP_PHASE2_START_MODE_IMEDIATE,
+ MSP_PHASE2_START_MODE_IMEDIATE,
+ MSP_BTF_MS_BIT_FIRST,
+ MSP_BTF_MS_BIT_FIRST,
+ MSP_FRAME_LEN_1,
+ MSP_FRAME_LEN_1,
+ MSP_FRAME_LEN_1,
+ MSP_FRAME_LEN_1,
+ MSP_ELEM_LEN_32,
+ MSP_ELEM_LEN_32,
+ MSP_ELEM_LEN_32,
+ MSP_ELEM_LEN_32,
+ MSP_DELAY_1,
+ MSP_DELAY_1,
+ MSP_RISING_EDGE,
+ MSP_FALLING_EDGE,
+ MSP_FSYNC_POL_ACT_LO,
+ MSP_FSYNC_POL_ACT_LO,
+ MSP_SWAP_NONE,
+ MSP_SWAP_NONE,
+ MSP_COMPRESS_MODE_LINEAR,
+ MSP_EXPAND_MODE_LINEAR,
+ MSP_FSYNC_IGNORE,
+ 31,
+ 15,
+ 32,
+ }, { /* PCM */
+ MSP_DUAL_PHASE,
+ MSP_DUAL_PHASE,
+ MSP_PHASE2_START_MODE_FSYNC,
+ MSP_PHASE2_START_MODE_FSYNC,
+ MSP_BTF_MS_BIT_FIRST,
+ MSP_BTF_MS_BIT_FIRST,
+ MSP_FRAME_LEN_1,
+ MSP_FRAME_LEN_1,
+ MSP_FRAME_LEN_1,
+ MSP_FRAME_LEN_1,
+ MSP_ELEM_LEN_16,
+ MSP_ELEM_LEN_16,
+ MSP_ELEM_LEN_16,
+ MSP_ELEM_LEN_16,
+ MSP_DELAY_0,
+ MSP_DELAY_0,
+ MSP_RISING_EDGE,
+ MSP_FALLING_EDGE,
+ MSP_FSYNC_POL_ACT_HI,
+ MSP_FSYNC_POL_ACT_HI,
+ MSP_SWAP_NONE,
+ MSP_SWAP_NONE,
+ MSP_COMPRESS_MODE_LINEAR,
+ MSP_EXPAND_MODE_LINEAR,
+ MSP_FSYNC_IGNORE,
+ 255,
+ 0,
+ 256,
+ }, { /* Companded PCM */
+ MSP_SINGLE_PHASE,
+ MSP_SINGLE_PHASE,
+ MSP_PHASE2_START_MODE_FSYNC,
+ MSP_PHASE2_START_MODE_FSYNC,
+ MSP_BTF_MS_BIT_FIRST,
+ MSP_BTF_MS_BIT_FIRST,
+ MSP_FRAME_LEN_1,
+ MSP_FRAME_LEN_1,
+ MSP_FRAME_LEN_1,
+ MSP_FRAME_LEN_1,
+ MSP_ELEM_LEN_8,
+ MSP_ELEM_LEN_8,
+ MSP_ELEM_LEN_8,
+ MSP_ELEM_LEN_8,
+ MSP_DELAY_0,
+ MSP_DELAY_0,
+ MSP_RISING_EDGE,
+ MSP_RISING_EDGE,
+ MSP_FSYNC_POL_ACT_HI,
+ MSP_FSYNC_POL_ACT_HI,
+ MSP_SWAP_NONE,
+ MSP_SWAP_NONE,
+ MSP_COMPRESS_MODE_LINEAR,
+ MSP_EXPAND_MODE_LINEAR,
+ MSP_FSYNC_IGNORE,
+ 255,
+ 0,
+ 256,
+ },
+};
+
+static void set_prot_desc_tx(struct ux500_msp *msp,
+ struct msp_protdesc *protdesc,
+ enum msp_data_size data_size)
+{
+ u32 temp_reg = 0;
+
+ temp_reg |= MSP_P2_ENABLE_BIT(protdesc->tx_phase_mode);
+ temp_reg |= MSP_P2_START_MODE_BIT(protdesc->tx_phase2_start_mode);
+ temp_reg |= MSP_P1_FRAME_LEN_BITS(protdesc->tx_frame_len_1);
+ temp_reg |= MSP_P2_FRAME_LEN_BITS(protdesc->tx_frame_len_2);
+ if (msp->def_elem_len) {
+ temp_reg |= MSP_P1_ELEM_LEN_BITS(protdesc->tx_elem_len_1);
+ temp_reg |= MSP_P2_ELEM_LEN_BITS(protdesc->tx_elem_len_2);
+ } else {
+ temp_reg |= MSP_P1_ELEM_LEN_BITS(data_size);
+ temp_reg |= MSP_P2_ELEM_LEN_BITS(data_size);
+ }
+ temp_reg |= MSP_DATA_DELAY_BITS(protdesc->tx_data_delay);
+ temp_reg |= MSP_SET_ENDIANNES_BIT(protdesc->tx_byte_order);
+ temp_reg |= MSP_FSYNC_POL(protdesc->tx_fsync_pol);
+ temp_reg |= MSP_DATA_WORD_SWAP(protdesc->tx_half_word_swap);
+ temp_reg |= MSP_SET_COMPANDING_MODE(protdesc->compression_mode);
+ temp_reg |= MSP_SET_FSYNC_IGNORE(protdesc->frame_sync_ignore);
+
+ writel(temp_reg, msp->registers + MSP_TCF);
+}
+
+static void set_prot_desc_rx(struct ux500_msp *msp,
+ struct msp_protdesc *protdesc,
+ enum msp_data_size data_size)
+{
+ u32 temp_reg = 0;
+
+ temp_reg |= MSP_P2_ENABLE_BIT(protdesc->rx_phase_mode);
+ temp_reg |= MSP_P2_START_MODE_BIT(protdesc->rx_phase2_start_mode);
+ temp_reg |= MSP_P1_FRAME_LEN_BITS(protdesc->rx_frame_len_1);
+ temp_reg |= MSP_P2_FRAME_LEN_BITS(protdesc->rx_frame_len_2);
+ if (msp->def_elem_len) {
+ temp_reg |= MSP_P1_ELEM_LEN_BITS(protdesc->rx_elem_len_1);
+ temp_reg |= MSP_P2_ELEM_LEN_BITS(protdesc->rx_elem_len_2);
+ } else {
+ temp_reg |= MSP_P1_ELEM_LEN_BITS(data_size);
+ temp_reg |= MSP_P2_ELEM_LEN_BITS(data_size);
+ }
+
+ temp_reg |= MSP_DATA_DELAY_BITS(protdesc->rx_data_delay);
+ temp_reg |= MSP_SET_ENDIANNES_BIT(protdesc->rx_byte_order);
+ temp_reg |= MSP_FSYNC_POL(protdesc->rx_fsync_pol);
+ temp_reg |= MSP_DATA_WORD_SWAP(protdesc->rx_half_word_swap);
+ temp_reg |= MSP_SET_COMPANDING_MODE(protdesc->expansion_mode);
+ temp_reg |= MSP_SET_FSYNC_IGNORE(protdesc->frame_sync_ignore);
+
+ writel(temp_reg, msp->registers + MSP_RCF);
+}
+
+static int configure_protocol(struct ux500_msp *msp,
+ struct ux500_msp_config *config)
+{
+ struct msp_protdesc *protdesc;
+ enum msp_data_size data_size;
+ u32 temp_reg = 0;
+
+ data_size = config->data_size;
+ msp->def_elem_len = config->def_elem_len;
+ if (config->default_protdesc == 1) {
+ if (config->protocol >= MSP_INVALID_PROTOCOL) {
+ dev_err(msp->dev, "%s: ERROR: Invalid protocol!\n",
+ __func__);
+ return -EINVAL;
+ }
+ protdesc =
+ (struct msp_protdesc *)&prot_descs[config->protocol];
+ } else {
+ protdesc = (struct msp_protdesc *)&config->protdesc;
+ }
+
+ if (data_size < MSP_DATA_BITS_DEFAULT || data_size > MSP_DATA_BITS_32) {
+ dev_err(msp->dev,
+ "%s: ERROR: Invalid data-size requested (data_size = %d)!\n",
+ __func__, data_size);
+ return -EINVAL;
+ }
+
+ if (config->direction & MSP_DIR_TX)
+ set_prot_desc_tx(msp, protdesc, data_size);
+ if (config->direction & MSP_DIR_RX)
+ set_prot_desc_rx(msp, protdesc, data_size);
+
+ /* The code below should not be separated. */
+ temp_reg = readl(msp->registers + MSP_GCR) & ~TX_CLK_POL_RISING;
+ temp_reg |= MSP_TX_CLKPOL_BIT(~protdesc->tx_clk_pol);
+ writel(temp_reg, msp->registers + MSP_GCR);
+ temp_reg = readl(msp->registers + MSP_GCR) & ~RX_CLK_POL_RISING;
+ temp_reg |= MSP_RX_CLKPOL_BIT(protdesc->rx_clk_pol);
+ writel(temp_reg, msp->registers + MSP_GCR);
+
+ return 0;
+}
+
+static int setup_bitclk(struct ux500_msp *msp, struct ux500_msp_config *config)
+{
+ u32 reg_val_GCR;
+ u32 frame_per = 0;
+ u32 sck_div = 0;
+ u32 frame_width = 0;
+ u32 temp_reg = 0;
+ struct msp_protdesc *protdesc = NULL;
+
+ reg_val_GCR = readl(msp->registers + MSP_GCR);
+ writel(reg_val_GCR & ~SRG_ENABLE, msp->registers + MSP_GCR);
+
+ if (config->default_protdesc)
+ protdesc =
+ (struct msp_protdesc *)&prot_descs[config->protocol];
+ else
+ protdesc = (struct msp_protdesc *)&config->protdesc;
+
+ switch (config->protocol) {
+ case MSP_PCM_PROTOCOL:
+ case MSP_PCM_COMPAND_PROTOCOL:
+ frame_width = protdesc->frame_width;
+ sck_div = config->f_inputclk / (config->frame_freq *
+ (protdesc->clocks_per_frame));
+ frame_per = protdesc->frame_period;
+ break;
+ case MSP_I2S_PROTOCOL:
+ frame_width = protdesc->frame_width;
+ sck_div = config->f_inputclk / (config->frame_freq *
+ (protdesc->clocks_per_frame));
+ frame_per = protdesc->frame_period;
+ break;
+ default:
+ dev_err(msp->dev, "%s: ERROR: Unknown protocol (%d)!\n",
+ __func__,
+ config->protocol);
+ return -EINVAL;
+ }
+
+ temp_reg = (sck_div - 1) & SCK_DIV_MASK;
+ temp_reg |= FRAME_WIDTH_BITS(frame_width);
+ temp_reg |= FRAME_PERIOD_BITS(frame_per);
+ writel(temp_reg, msp->registers + MSP_SRG);
+
+ msp->f_bitclk = (config->f_inputclk)/(sck_div + 1);
+
+ /* Enable bit-clock */
+ udelay(100);
+ reg_val_GCR = readl(msp->registers + MSP_GCR);
+ writel(reg_val_GCR | SRG_ENABLE, msp->registers + MSP_GCR);
+ udelay(100);
+
+ return 0;
+}
+
+static int configure_multichannel(struct ux500_msp *msp,
+ struct ux500_msp_config *config)
+{
+ struct msp_protdesc *protdesc;
+ struct msp_multichannel_config *mcfg;
+ u32 reg_val_MCR;
+
+ if (config->default_protdesc == 1) {
+ if (config->protocol >= MSP_INVALID_PROTOCOL) {
+ dev_err(msp->dev,
+ "%s: ERROR: Invalid protocol (%d)!\n",
+ __func__, config->protocol);
+ return -EINVAL;
+ }
+ protdesc = (struct msp_protdesc *)
+ &prot_descs[config->protocol];
+ } else {
+ protdesc = (struct msp_protdesc *)&config->protdesc;
+ }
+
+ mcfg = &config->multichannel_config;
+ if (mcfg->tx_multichannel_enable) {
+ if (protdesc->tx_phase_mode == MSP_SINGLE_PHASE) {
+ reg_val_MCR = readl(msp->registers + MSP_MCR);
+ writel(reg_val_MCR | (mcfg->tx_multichannel_enable ?
+ 1 << TMCEN_BIT : 0),
+ msp->registers + MSP_MCR);
+ writel(mcfg->tx_channel_0_enable,
+ msp->registers + MSP_TCE0);
+ writel(mcfg->tx_channel_1_enable,
+ msp->registers + MSP_TCE1);
+ writel(mcfg->tx_channel_2_enable,
+ msp->registers + MSP_TCE2);
+ writel(mcfg->tx_channel_3_enable,
+ msp->registers + MSP_TCE3);
+ } else {
+ dev_err(msp->dev,
+ "%s: ERROR: Only single-phase supported (TX-mode: %d)!\n",
+ __func__, protdesc->tx_phase_mode);
+ return -EINVAL;
+ }
+ }
+ if (mcfg->rx_multichannel_enable) {
+ if (protdesc->rx_phase_mode == MSP_SINGLE_PHASE) {
+ reg_val_MCR = readl(msp->registers + MSP_MCR);
+ writel(reg_val_MCR | (mcfg->rx_multichannel_enable ?
+ 1 << RMCEN_BIT : 0),
+ msp->registers + MSP_MCR);
+ writel(mcfg->rx_channel_0_enable,
+ msp->registers + MSP_RCE0);
+ writel(mcfg->rx_channel_1_enable,
+ msp->registers + MSP_RCE1);
+ writel(mcfg->rx_channel_2_enable,
+ msp->registers + MSP_RCE2);
+ writel(mcfg->rx_channel_3_enable,
+ msp->registers + MSP_RCE3);
+ } else {
+ dev_err(msp->dev,
+ "%s: ERROR: Only single-phase supported (RX-mode: %d)!\n",
+ __func__, protdesc->rx_phase_mode);
+ return -EINVAL;
+ }
+ if (mcfg->rx_comparison_enable_mode) {
+ reg_val_MCR = readl(msp->registers + MSP_MCR);
+ writel(reg_val_MCR |
+ (mcfg->rx_comparison_enable_mode << RCMPM_BIT),
+ msp->registers + MSP_MCR);
+
+ writel(mcfg->comparison_mask,
+ msp->registers + MSP_RCM);
+ writel(mcfg->comparison_value,
+ msp->registers + MSP_RCV);
+
+ }
+ }
+
+ return 0;
+}
+
+static int enable_msp(struct ux500_msp *msp, struct ux500_msp_config *config)
+{
+ int status = 0;
+ u32 reg_val_DMACR, reg_val_GCR;
+
+ /* Check msp state whether in RUN or CONFIGURED Mode */
+ if ((msp->msp_state == MSP_STATE_IDLE) && (msp->plat_init)) {
+ status = msp->plat_init();
+ if (status) {
+ dev_err(msp->dev, "%s: ERROR: Failed to init MSP (%d)!\n",
+ __func__, status);
+ return status;
+ }
+ }
+
+ /* Configure msp with protocol dependent settings */
+ configure_protocol(msp, config);
+ setup_bitclk(msp, config);
+ if (config->multichannel_configured == 1) {
+ status = configure_multichannel(msp, config);
+ if (status)
+ dev_warn(msp->dev,
+ "%s: WARN: configure_multichannel failed (%d)!\n",
+ __func__, status);
+ }
+
+ /* Make sure the correct DMA-directions are configured */
+ if ((config->direction & MSP_DIR_RX) && (!msp->dma_cfg_rx)) {
+ dev_err(msp->dev, "%s: ERROR: MSP RX-mode is not configured!",
+ __func__);
+ return -EINVAL;
+ }
+ if ((config->direction == MSP_DIR_TX) && (!msp->dma_cfg_tx)) {
+ dev_err(msp->dev, "%s: ERROR: MSP TX-mode is not configured!",
+ __func__);
+ return -EINVAL;
+ }
+
+ reg_val_DMACR = readl(msp->registers + MSP_DMACR);
+ if (config->direction & MSP_DIR_RX)
+ reg_val_DMACR |= RX_DMA_ENABLE;
+ if (config->direction & MSP_DIR_TX)
+ reg_val_DMACR |= TX_DMA_ENABLE;
+ writel(reg_val_DMACR, msp->registers + MSP_DMACR);
+
+ writel(config->iodelay, msp->registers + MSP_IODLY);
+
+ /* Enable frame generation logic */
+ reg_val_GCR = readl(msp->registers + MSP_GCR);
+ writel(reg_val_GCR | FRAME_GEN_ENABLE, msp->registers + MSP_GCR);
+
+ return status;
+}
+
+static void flush_fifo_rx(struct ux500_msp *msp)
+{
+ u32 reg_val_DR, reg_val_GCR, reg_val_FLR;
+ u32 limit = 32;
+
+ reg_val_GCR = readl(msp->registers + MSP_GCR);
+ writel(reg_val_GCR | RX_ENABLE, msp->registers + MSP_GCR);
+
+ reg_val_FLR = readl(msp->registers + MSP_FLR);
+ while (!(reg_val_FLR & RX_FIFO_EMPTY) && limit--) {
+ reg_val_DR = readl(msp->registers + MSP_DR);
+ reg_val_FLR = readl(msp->registers + MSP_FLR);
+ }
+
+ writel(reg_val_GCR, msp->registers + MSP_GCR);
+}
+
+static void flush_fifo_tx(struct ux500_msp *msp)
+{
+ u32 reg_val_TSTDR, reg_val_GCR, reg_val_FLR;
+ u32 limit = 32;
+
+ reg_val_GCR = readl(msp->registers + MSP_GCR);
+ writel(reg_val_GCR | TX_ENABLE, msp->registers + MSP_GCR);
+ writel(MSP_ITCR_ITEN | MSP_ITCR_TESTFIFO, msp->registers + MSP_ITCR);
+
+ reg_val_FLR = readl(msp->registers + MSP_FLR);
+ while (!(reg_val_FLR & TX_FIFO_EMPTY) && limit--) {
+ reg_val_TSTDR = readl(msp->registers + MSP_TSTDR);
+ reg_val_FLR = readl(msp->registers + MSP_FLR);
+ }
+ writel(0x0, msp->registers + MSP_ITCR);
+ writel(reg_val_GCR, msp->registers + MSP_GCR);
+}
+
+int ux500_msp_i2s_open(struct ux500_msp *msp,
+ struct ux500_msp_config *config)
+{
+ u32 old_reg, new_reg, mask;
+ int res;
+ unsigned int tx_sel, rx_sel, tx_busy, rx_busy;
+
+ if (in_interrupt()) {
+ dev_err(msp->dev,
+ "%s: ERROR: Open called in interrupt context!\n",
+ __func__);
+ return -1;
+ }
+
+ tx_sel = (config->direction & MSP_DIR_TX) > 0;
+ rx_sel = (config->direction & MSP_DIR_RX) > 0;
+ if (!tx_sel && !rx_sel) {
+ dev_err(msp->dev, "%s: Error: No direction selected!\n",
+ __func__);
+ return -EINVAL;
+ }
+
+ tx_busy = (msp->dir_busy & MSP_DIR_TX) > 0;
+ rx_busy = (msp->dir_busy & MSP_DIR_RX) > 0;
+ if (tx_busy && tx_sel) {
+ dev_err(msp->dev, "%s: Error: TX is in use!\n", __func__);
+ return -EBUSY;
+ }
+ if (rx_busy && rx_sel) {
+ dev_err(msp->dev, "%s: Error: RX is in use!\n", __func__);
+ return -EBUSY;
+ }
+
+ msp->dir_busy |= (tx_sel ? MSP_DIR_TX : 0) | (rx_sel ? MSP_DIR_RX : 0);
+
+ /* First do the global config register */
+ mask = RX_CLK_SEL_MASK | TX_CLK_SEL_MASK | RX_FSYNC_MASK |
+ TX_FSYNC_MASK | RX_SYNC_SEL_MASK | TX_SYNC_SEL_MASK |
+ RX_FIFO_ENABLE_MASK | TX_FIFO_ENABLE_MASK | SRG_CLK_SEL_MASK |
+ LOOPBACK_MASK | TX_EXTRA_DELAY_MASK;
+
+ new_reg = (config->tx_clk_sel | config->rx_clk_sel |
+ config->rx_fsync_pol | config->tx_fsync_pol |
+ config->rx_fsync_sel | config->tx_fsync_sel |
+ config->rx_fifo_config | config->tx_fifo_config |
+ config->srg_clk_sel | config->loopback_enable |
+ config->tx_data_enable);
+
+ old_reg = readl(msp->registers + MSP_GCR);
+ old_reg &= ~mask;
+ new_reg |= old_reg;
+ writel(new_reg, msp->registers + MSP_GCR);
+
+ res = enable_msp(msp, config);
+ if (res < 0) {
+ dev_err(msp->dev, "%s: ERROR: enable_msp failed (%d)!\n",
+ __func__, res);
+ return -EBUSY;
+ }
+ if (config->loopback_enable & 0x80)
+ msp->loopback_enable = 1;
+
+ /* Flush FIFOs */
+ flush_fifo_tx(msp);
+ flush_fifo_rx(msp);
+
+ msp->msp_state = MSP_STATE_CONFIGURED;
+ return 0;
+}
+
+static void disable_msp_rx(struct ux500_msp *msp)
+{
+ u32 reg_val_GCR, reg_val_DMACR, reg_val_IMSC;
+
+ reg_val_GCR = readl(msp->registers + MSP_GCR);
+ writel(reg_val_GCR & ~RX_ENABLE, msp->registers + MSP_GCR);
+ reg_val_DMACR = readl(msp->registers + MSP_DMACR);
+ writel(reg_val_DMACR & ~RX_DMA_ENABLE, msp->registers + MSP_DMACR);
+ reg_val_IMSC = readl(msp->registers + MSP_IMSC);
+ writel(reg_val_IMSC &
+ ~(RX_SERVICE_INT | RX_OVERRUN_ERROR_INT),
+ msp->registers + MSP_IMSC);
+
+ msp->dir_busy &= ~MSP_DIR_RX;
+}
+
+static void disable_msp_tx(struct ux500_msp *msp)
+{
+ u32 reg_val_GCR, reg_val_DMACR, reg_val_IMSC;
+
+ reg_val_GCR = readl(msp->registers + MSP_GCR);
+ writel(reg_val_GCR & ~TX_ENABLE, msp->registers + MSP_GCR);
+ reg_val_DMACR = readl(msp->registers + MSP_DMACR);
+ writel(reg_val_DMACR & ~TX_DMA_ENABLE, msp->registers + MSP_DMACR);
+ reg_val_IMSC = readl(msp->registers + MSP_IMSC);
+ writel(reg_val_IMSC &
+ ~(TX_SERVICE_INT | TX_UNDERRUN_ERR_INT),
+ msp->registers + MSP_IMSC);
+
+ msp->dir_busy &= ~MSP_DIR_TX;
+}
+
+static int disable_msp(struct ux500_msp *msp, unsigned int dir)
+{
+ u32 reg_val_GCR;
+ int status = 0;
+ unsigned int disable_tx, disable_rx;
+
+ reg_val_GCR = readl(msp->registers + MSP_GCR);
+ disable_tx = dir & MSP_DIR_TX;
+ disable_rx = dir & MSP_DIR_TX;
+ if (disable_tx && disable_rx) {
+ reg_val_GCR = readl(msp->registers + MSP_GCR);
+ writel(reg_val_GCR | LOOPBACK_MASK,
+ msp->registers + MSP_GCR);
+
+ /* Flush TX-FIFO */
+ flush_fifo_tx(msp);
+
+ /* Disable TX-channel */
+ writel((readl(msp->registers + MSP_GCR) &
+ (~TX_ENABLE)), msp->registers + MSP_GCR);
+
+ /* Flush RX-FIFO */
+ flush_fifo_rx(msp);
+
+ /* Disable Loopback and Receive channel */
+ writel((readl(msp->registers + MSP_GCR) &
+ (~(RX_ENABLE | LOOPBACK_MASK))),
+ msp->registers + MSP_GCR);
+
+ disable_msp_tx(msp);
+ disable_msp_rx(msp);
+ } else if (disable_tx)
+ disable_msp_tx(msp);
+ else if (disable_rx)
+ disable_msp_rx(msp);
+
+ return status;
+}
+
+int ux500_msp_i2s_trigger(struct ux500_msp *msp, int cmd, int direction)
+{
+ u32 reg_val_GCR, enable_bit;
+
+ if (msp->msp_state == MSP_STATE_IDLE) {
+ dev_err(msp->dev, "%s: ERROR: MSP is not configured!\n",
+ __func__);
+ return -EINVAL;
+ }
+
+ switch (cmd) {
+ case SNDRV_PCM_TRIGGER_START:
+ case SNDRV_PCM_TRIGGER_RESUME:
+ case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
+ if (direction == SNDRV_PCM_STREAM_PLAYBACK)
+ enable_bit = TX_ENABLE;
+ else
+ enable_bit = RX_ENABLE;
+ reg_val_GCR = readl(msp->registers + MSP_GCR);
+ writel(reg_val_GCR | enable_bit, msp->registers + MSP_GCR);
+ break;
+
+ case SNDRV_PCM_TRIGGER_STOP:
+ case SNDRV_PCM_TRIGGER_SUSPEND:
+ case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
+ if (direction == SNDRV_PCM_STREAM_PLAYBACK)
+ disable_msp_tx(msp);
+ else
+ disable_msp_rx(msp);
+ break;
+ default:
+ return -EINVAL;
+ break;
+ }
+
+ return 0;
+}
+
+int ux500_msp_i2s_close(struct ux500_msp *msp, unsigned int dir)
+{
+ int status = 0;
+
+ dev_dbg(msp->dev, "%s: Enter (dir = 0x%01x).\n", __func__, dir);
+
+ status = disable_msp(msp, dir);
+ if (msp->dir_busy == 0) {
+ /* disable sample rate and frame generators */
+ msp->msp_state = MSP_STATE_IDLE;
+ writel((readl(msp->registers + MSP_GCR) &
+ (~(FRAME_GEN_ENABLE | SRG_ENABLE))),
+ msp->registers + MSP_GCR);
+ if (msp->plat_exit)
+ status = msp->plat_exit();
+ if (status)
+ dev_warn(msp->dev,
+ "%s: WARN: ux500_msp_i2s_exit failed (%d)!\n",
+ __func__, status);
+ writel(0, msp->registers + MSP_GCR);
+ writel(0, msp->registers + MSP_TCF);
+ writel(0, msp->registers + MSP_RCF);
+ writel(0, msp->registers + MSP_DMACR);
+ writel(0, msp->registers + MSP_SRG);
+ writel(0, msp->registers + MSP_MCR);
+ writel(0, msp->registers + MSP_RCM);
+ writel(0, msp->registers + MSP_RCV);
+ writel(0, msp->registers + MSP_TCE0);
+ writel(0, msp->registers + MSP_TCE1);
+ writel(0, msp->registers + MSP_TCE2);
+ writel(0, msp->registers + MSP_TCE3);
+ writel(0, msp->registers + MSP_RCE0);
+ writel(0, msp->registers + MSP_RCE1);
+ writel(0, msp->registers + MSP_RCE2);
+ writel(0, msp->registers + MSP_RCE3);
+ }
+
+ return status;
+
+}
+
+int ux500_msp_i2s_init_msp(struct platform_device *pdev,
+ struct ux500_msp **msp_p,
+ struct msp_i2s_platform_data *platform_data)
+{
+ int ret = 0;
+ struct resource *res = NULL;
+ struct i2s_controller *i2s_cont;
+ struct ux500_msp *msp;
+
+ dev_dbg(&pdev->dev, "%s: Enter (name: %s, id: %d).\n", __func__,
+ pdev->name, platform_data->id);
+
+ *msp_p = devm_kzalloc(&pdev->dev, sizeof(struct ux500_msp), GFP_KERNEL);
+ msp = *msp_p;
+
+ msp->id = platform_data->id;
+ msp->dev = &pdev->dev;
+ msp->plat_init = platform_data->msp_i2s_init;
+ msp->plat_exit = platform_data->msp_i2s_exit;
+ msp->dma_cfg_rx = platform_data->msp_i2s_dma_rx;
+ msp->dma_cfg_tx = platform_data->msp_i2s_dma_tx;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (res == NULL) {
+ dev_err(&pdev->dev, "%s: ERROR: Unable to get resource!\n",
+ __func__);
+ ret = -ENOMEM;
+ goto err_res;
+ }
+
+ msp->registers = ioremap(res->start, (res->end - res->start + 1));
+ if (msp->registers == NULL) {
+ dev_err(&pdev->dev, "%s: ERROR: ioremap failed!\n", __func__);
+ ret = -ENOMEM;
+ goto err_res;
+ }
+
+ msp->msp_state = MSP_STATE_IDLE;
+ msp->loopback_enable = 0;
+
+ /* I2S-controller is allocated and added in I2S controller class. */
+ i2s_cont = devm_kzalloc(&pdev->dev, sizeof(*i2s_cont), GFP_KERNEL);
+ if (!i2s_cont) {
+ dev_err(&pdev->dev,
+ "%s: ERROR: Failed to allocate I2S-controller!\n",
+ __func__);
+ goto err_i2s_cont;
+ }
+ i2s_cont->dev.parent = &pdev->dev;
+ i2s_cont->data = (void *)msp;
+ i2s_cont->id = (s16)msp->id;
+ snprintf(i2s_cont->name, sizeof(i2s_cont->name), "ux500-msp-i2s.%04x",
+ msp->id);
+ dev_dbg(&pdev->dev, "I2S device-name: '%s'\n", i2s_cont->name);
+ msp->i2s_cont = i2s_cont;
+
+ return 0;
+
+err_i2s_cont:
+ iounmap(msp->registers);
+
+err_res:
+ devm_kfree(&pdev->dev, msp);
+
+ return ret;
+}
+
+void ux500_msp_i2s_cleanup_msp(struct platform_device *pdev,
+ struct ux500_msp *msp)
+{
+ dev_dbg(msp->dev, "%s: Enter (id = %d).\n", __func__, msp->id);
+
+ device_unregister(&msp->i2s_cont->dev);
+ devm_kfree(&pdev->dev, msp->i2s_cont);
+
+ iounmap(msp->registers);
+
+ devm_kfree(&pdev->dev, msp);
+}
+
+MODULE_LICENSE("GPLv2");