| /* |
| * 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/pinctrl/consumer.h> |
| #include <linux/delay.h> |
| #include <linux/slab.h> |
| #include <linux/io.h> |
| #include <linux/of.h> |
| #include <linux/platform_data/asoc-ux500-msp.h> |
| |
| #include <sound/soc.h> |
| |
| #include "ux500_msp_i2s.h" |
| |
| /* MSP1/3 Tx/Rx usage protection */ |
| static DEFINE_SPINLOCK(msp_rxtx_lock); |
| |
| /* 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, retval = 0; |
| u32 reg_val_DMACR, reg_val_GCR; |
| unsigned long flags; |
| |
| /* Check msp state whether in RUN or CONFIGURED Mode */ |
| if (msp->msp_state == MSP_STATE_IDLE) { |
| spin_lock_irqsave(&msp_rxtx_lock, flags); |
| if (msp->pinctrl_rxtx_ref == 0 && |
| !(IS_ERR(msp->pinctrl_p) || IS_ERR(msp->pinctrl_def))) { |
| retval = pinctrl_select_state(msp->pinctrl_p, |
| msp->pinctrl_def); |
| if (retval) |
| pr_err("could not set MSP defstate\n"); |
| } |
| if (!retval) |
| msp->pinctrl_rxtx_ref++; |
| spin_unlock_irqrestore(&msp_rxtx_lock, flags); |
| } |
| |
| /* 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, retval = 0; |
| unsigned long flags; |
| |
| 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); |
| |
| spin_lock_irqsave(&msp_rxtx_lock, flags); |
| WARN_ON(!msp->pinctrl_rxtx_ref); |
| msp->pinctrl_rxtx_ref--; |
| if (msp->pinctrl_rxtx_ref == 0 && |
| !(IS_ERR(msp->pinctrl_p) || IS_ERR(msp->pinctrl_sleep))) { |
| retval = pinctrl_select_state(msp->pinctrl_p, |
| msp->pinctrl_sleep); |
| if (retval) |
| pr_err("could not set MSP sleepstate\n"); |
| } |
| spin_unlock_irqrestore(&msp_rxtx_lock, flags); |
| |
| 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) |
| { |
| struct resource *res = NULL; |
| struct i2s_controller *i2s_cont; |
| struct device_node *np = pdev->dev.of_node; |
| struct ux500_msp *msp; |
| |
| *msp_p = devm_kzalloc(&pdev->dev, sizeof(struct ux500_msp), GFP_KERNEL); |
| msp = *msp_p; |
| if (!msp) |
| return -ENOMEM; |
| |
| if (np) { |
| if (!platform_data) { |
| platform_data = devm_kzalloc(&pdev->dev, |
| sizeof(struct msp_i2s_platform_data), GFP_KERNEL); |
| if (!platform_data) |
| return -ENOMEM; |
| } |
| } else |
| if (!platform_data) |
| return -EINVAL; |
| |
| dev_dbg(&pdev->dev, "%s: Enter (name: %s, id: %d).\n", __func__, |
| pdev->name, platform_data->id); |
| |
| msp->id = platform_data->id; |
| msp->dev = &pdev->dev; |
| 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__); |
| return -ENOMEM; |
| } |
| |
| msp->registers = devm_ioremap(&pdev->dev, res->start, |
| resource_size(res)); |
| if (msp->registers == NULL) { |
| dev_err(&pdev->dev, "%s: ERROR: ioremap failed!\n", __func__); |
| return -ENOMEM; |
| } |
| |
| 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__); |
| return -ENOMEM; |
| } |
| 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; |
| |
| msp->pinctrl_p = pinctrl_get(msp->dev); |
| if (IS_ERR(msp->pinctrl_p)) |
| dev_err(&pdev->dev, "could not get MSP pinctrl\n"); |
| else { |
| msp->pinctrl_def = pinctrl_lookup_state(msp->pinctrl_p, |
| PINCTRL_STATE_DEFAULT); |
| if (IS_ERR(msp->pinctrl_def)) { |
| dev_err(&pdev->dev, |
| "could not get MSP defstate (%li)\n", |
| PTR_ERR(msp->pinctrl_def)); |
| } |
| msp->pinctrl_sleep = pinctrl_lookup_state(msp->pinctrl_p, |
| PINCTRL_STATE_SLEEP); |
| if (IS_ERR(msp->pinctrl_sleep)) |
| dev_err(&pdev->dev, |
| "could not get MSP idlestate (%li)\n", |
| PTR_ERR(msp->pinctrl_def)); |
| } |
| |
| return 0; |
| } |
| |
| 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); |
| } |
| |
| MODULE_LICENSE("GPL v2"); |