diff options
author | Takashi Iwai <tiwai@suse.de> | 2023-04-24 16:15:31 +0300 |
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committer | Takashi Iwai <tiwai@suse.de> | 2023-04-24 16:15:31 +0300 |
commit | baa6584a24494fbbd2862270d39e61b86987cc91 (patch) | |
tree | 1ad9e7b71703c57fbdfd34bb67f8838b46ac4dc8 /drivers/soc | |
parent | 7002cbd625467084f1ef01b6e365e10b51fc4b9f (diff) | |
parent | dc801ea8ae37d54706e6f1cef140731ac5981c9c (diff) | |
download | linux-baa6584a24494fbbd2862270d39e61b86987cc91.tar.xz |
Merge tag 'asoc-v6.4' of https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound into for-next
ASoC: Updates for v6.4
The bulk of the commits here are for the conversion of drivers to use
void remove callbacks but there's a reasonable amount of other stuff
going on, the pace of development with the SOF code continues to be high
and there's a bunch of new drivers too:
- More core cleanups from Morimto-san.
- Update drivers to have remove() callbacks returning void, mostly
mechanical with some substantial changes.
- Continued feature and simplification work on SOF, including addition
of a no-DSP mode for bringup, HDA MLink and extensions to the IPC4
protocol.
- Hibernation support for CS35L45.
- More DT binding conversions.
- Support for Cirrus Logic CS35L56, Freescale QMC, Maxim MAX98363,
nVidia systems with MAX9809x and RT5631, Realtek RT712, Renesas R-Car
Gen4, Rockchip RK3588 and TI TAS5733.
Diffstat (limited to 'drivers/soc')
-rw-r--r-- | drivers/soc/fsl/qe/Kconfig | 23 | ||||
-rw-r--r-- | drivers/soc/fsl/qe/Makefile | 2 | ||||
-rw-r--r-- | drivers/soc/fsl/qe/qmc.c | 1537 | ||||
-rw-r--r-- | drivers/soc/fsl/qe/tsa.c | 846 | ||||
-rw-r--r-- | drivers/soc/fsl/qe/tsa.h | 42 |
5 files changed, 2450 insertions, 0 deletions
diff --git a/drivers/soc/fsl/qe/Kconfig b/drivers/soc/fsl/qe/Kconfig index 357c5800b112..7268c2fbcbc1 100644 --- a/drivers/soc/fsl/qe/Kconfig +++ b/drivers/soc/fsl/qe/Kconfig @@ -33,6 +33,29 @@ config UCC bool default y if UCC_FAST || UCC_SLOW +config CPM_TSA + tristate "CPM TSA support" + depends on OF && HAS_IOMEM + depends on CPM1 || COMPILE_TEST + help + Freescale CPM Time Slot Assigner (TSA) + controller. + + This option enables support for this + controller + +config CPM_QMC + tristate "CPM QMC support" + depends on OF && HAS_IOMEM + depends on CPM1 || (FSL_SOC && COMPILE_TEST) + depends on CPM_TSA + help + Freescale CPM QUICC Multichannel Controller + (QMC) + + This option enables support for this + controller + config QE_TDM bool default y if FSL_UCC_HDLC diff --git a/drivers/soc/fsl/qe/Makefile b/drivers/soc/fsl/qe/Makefile index 55a555304f3a..ec8506e13113 100644 --- a/drivers/soc/fsl/qe/Makefile +++ b/drivers/soc/fsl/qe/Makefile @@ -4,6 +4,8 @@ # obj-$(CONFIG_QUICC_ENGINE)+= qe.o qe_common.o qe_ic.o qe_io.o obj-$(CONFIG_CPM) += qe_common.o +obj-$(CONFIG_CPM_TSA) += tsa.o +obj-$(CONFIG_CPM_QMC) += qmc.o obj-$(CONFIG_UCC) += ucc.o obj-$(CONFIG_UCC_SLOW) += ucc_slow.o obj-$(CONFIG_UCC_FAST) += ucc_fast.o diff --git a/drivers/soc/fsl/qe/qmc.c b/drivers/soc/fsl/qe/qmc.c new file mode 100644 index 000000000000..b3c292c9a14e --- /dev/null +++ b/drivers/soc/fsl/qe/qmc.c @@ -0,0 +1,1537 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * QMC driver + * + * Copyright 2022 CS GROUP France + * + * Author: Herve Codina <herve.codina@bootlin.com> + */ + +#include <soc/fsl/qe/qmc.h> +#include <linux/dma-mapping.h> +#include <linux/hdlc.h> +#include <linux/interrupt.h> +#include <linux/io.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/of_platform.h> +#include <linux/platform_device.h> +#include <linux/slab.h> +#include <soc/fsl/cpm.h> +#include <sysdev/fsl_soc.h> +#include "tsa.h" + +/* SCC general mode register high (32 bits) */ +#define SCC_GSMRL 0x00 +#define SCC_GSMRL_ENR (1 << 5) +#define SCC_GSMRL_ENT (1 << 4) +#define SCC_GSMRL_MODE_QMC (0x0A << 0) + +/* SCC general mode register low (32 bits) */ +#define SCC_GSMRH 0x04 +#define SCC_GSMRH_CTSS (1 << 7) +#define SCC_GSMRH_CDS (1 << 8) +#define SCC_GSMRH_CTSP (1 << 9) +#define SCC_GSMRH_CDP (1 << 10) + +/* SCC event register (16 bits) */ +#define SCC_SCCE 0x10 +#define SCC_SCCE_IQOV (1 << 3) +#define SCC_SCCE_GINT (1 << 2) +#define SCC_SCCE_GUN (1 << 1) +#define SCC_SCCE_GOV (1 << 0) + +/* SCC mask register (16 bits) */ +#define SCC_SCCM 0x14 +/* Multichannel base pointer (32 bits) */ +#define QMC_GBL_MCBASE 0x00 +/* Multichannel controller state (16 bits) */ +#define QMC_GBL_QMCSTATE 0x04 +/* Maximum receive buffer length (16 bits) */ +#define QMC_GBL_MRBLR 0x06 +/* Tx time-slot assignment table pointer (16 bits) */ +#define QMC_GBL_TX_S_PTR 0x08 +/* Rx pointer (16 bits) */ +#define QMC_GBL_RXPTR 0x0A +/* Global receive frame threshold (16 bits) */ +#define QMC_GBL_GRFTHR 0x0C +/* Global receive frame count (16 bits) */ +#define QMC_GBL_GRFCNT 0x0E +/* Multichannel interrupt base address (32 bits) */ +#define QMC_GBL_INTBASE 0x10 +/* Multichannel interrupt pointer (32 bits) */ +#define QMC_GBL_INTPTR 0x14 +/* Rx time-slot assignment table pointer (16 bits) */ +#define QMC_GBL_RX_S_PTR 0x18 +/* Tx pointer (16 bits) */ +#define QMC_GBL_TXPTR 0x1A +/* CRC constant (32 bits) */ +#define QMC_GBL_C_MASK32 0x1C +/* Time slot assignment table Rx (32 x 16 bits) */ +#define QMC_GBL_TSATRX 0x20 +/* Time slot assignment table Tx (32 x 16 bits) */ +#define QMC_GBL_TSATTX 0x60 +/* CRC constant (16 bits) */ +#define QMC_GBL_C_MASK16 0xA0 + +/* TSA entry (16bit entry in TSATRX and TSATTX) */ +#define QMC_TSA_VALID (1 << 15) +#define QMC_TSA_WRAP (1 << 14) +#define QMC_TSA_MASK (0x303F) +#define QMC_TSA_CHANNEL(x) ((x) << 6) + +/* Tx buffer descriptor base address (16 bits, offset from MCBASE) */ +#define QMC_SPE_TBASE 0x00 + +/* Channel mode register (16 bits) */ +#define QMC_SPE_CHAMR 0x02 +#define QMC_SPE_CHAMR_MODE_HDLC (1 << 15) +#define QMC_SPE_CHAMR_MODE_TRANSP ((0 << 15) | (1 << 13)) +#define QMC_SPE_CHAMR_ENT (1 << 12) +#define QMC_SPE_CHAMR_POL (1 << 8) +#define QMC_SPE_CHAMR_HDLC_IDLM (1 << 13) +#define QMC_SPE_CHAMR_HDLC_CRC (1 << 7) +#define QMC_SPE_CHAMR_HDLC_NOF (0x0f << 0) +#define QMC_SPE_CHAMR_TRANSP_RD (1 << 14) +#define QMC_SPE_CHAMR_TRANSP_SYNC (1 << 10) + +/* Tx internal state (32 bits) */ +#define QMC_SPE_TSTATE 0x04 +/* Tx buffer descriptor pointer (16 bits) */ +#define QMC_SPE_TBPTR 0x0C +/* Zero-insertion state (32 bits) */ +#define QMC_SPE_ZISTATE 0x14 +/* Channel’s interrupt mask flags (16 bits) */ +#define QMC_SPE_INTMSK 0x1C +/* Rx buffer descriptor base address (16 bits, offset from MCBASE) */ +#define QMC_SPE_RBASE 0x20 +/* HDLC: Maximum frame length register (16 bits) */ +#define QMC_SPE_MFLR 0x22 +/* TRANSPARENT: Transparent maximum receive length (16 bits) */ +#define QMC_SPE_TMRBLR 0x22 +/* Rx internal state (32 bits) */ +#define QMC_SPE_RSTATE 0x24 +/* Rx buffer descriptor pointer (16 bits) */ +#define QMC_SPE_RBPTR 0x2C +/* Packs 4 bytes to 1 long word before writing to buffer (32 bits) */ +#define QMC_SPE_RPACK 0x30 +/* Zero deletion state (32 bits) */ +#define QMC_SPE_ZDSTATE 0x34 + +/* Transparent synchronization (16 bits) */ +#define QMC_SPE_TRNSYNC 0x3C +#define QMC_SPE_TRNSYNC_RX(x) ((x) << 8) +#define QMC_SPE_TRNSYNC_TX(x) ((x) << 0) + +/* Interrupt related registers bits */ +#define QMC_INT_V (1 << 15) +#define QMC_INT_W (1 << 14) +#define QMC_INT_NID (1 << 13) +#define QMC_INT_IDL (1 << 12) +#define QMC_INT_GET_CHANNEL(x) (((x) & 0x0FC0) >> 6) +#define QMC_INT_MRF (1 << 5) +#define QMC_INT_UN (1 << 4) +#define QMC_INT_RXF (1 << 3) +#define QMC_INT_BSY (1 << 2) +#define QMC_INT_TXB (1 << 1) +#define QMC_INT_RXB (1 << 0) + +/* BD related registers bits */ +#define QMC_BD_RX_E (1 << 15) +#define QMC_BD_RX_W (1 << 13) +#define QMC_BD_RX_I (1 << 12) +#define QMC_BD_RX_L (1 << 11) +#define QMC_BD_RX_F (1 << 10) +#define QMC_BD_RX_CM (1 << 9) +#define QMC_BD_RX_UB (1 << 7) +#define QMC_BD_RX_LG (1 << 5) +#define QMC_BD_RX_NO (1 << 4) +#define QMC_BD_RX_AB (1 << 3) +#define QMC_BD_RX_CR (1 << 2) + +#define QMC_BD_TX_R (1 << 15) +#define QMC_BD_TX_W (1 << 13) +#define QMC_BD_TX_I (1 << 12) +#define QMC_BD_TX_L (1 << 11) +#define QMC_BD_TX_TC (1 << 10) +#define QMC_BD_TX_CM (1 << 9) +#define QMC_BD_TX_UB (1 << 7) +#define QMC_BD_TX_PAD (0x0f << 0) + +/* Numbers of BDs and interrupt items */ +#define QMC_NB_TXBDS 8 +#define QMC_NB_RXBDS 8 +#define QMC_NB_INTS 128 + +struct qmc_xfer_desc { + union { + void (*tx_complete)(void *context); + void (*rx_complete)(void *context, size_t length); + }; + void *context; +}; + +struct qmc_chan { + struct list_head list; + unsigned int id; + struct qmc *qmc; + void *__iomem s_param; + enum qmc_mode mode; + u64 tx_ts_mask; + u64 rx_ts_mask; + bool is_reverse_data; + + spinlock_t tx_lock; + cbd_t __iomem *txbds; + cbd_t __iomem *txbd_free; + cbd_t __iomem *txbd_done; + struct qmc_xfer_desc tx_desc[QMC_NB_TXBDS]; + u64 nb_tx_underrun; + bool is_tx_stopped; + + spinlock_t rx_lock; + cbd_t __iomem *rxbds; + cbd_t __iomem *rxbd_free; + cbd_t __iomem *rxbd_done; + struct qmc_xfer_desc rx_desc[QMC_NB_RXBDS]; + u64 nb_rx_busy; + int rx_pending; + bool is_rx_halted; + bool is_rx_stopped; +}; + +struct qmc { + struct device *dev; + struct tsa_serial *tsa_serial; + void *__iomem scc_regs; + void *__iomem scc_pram; + void *__iomem dpram; + u16 scc_pram_offset; + cbd_t __iomem *bd_table; + dma_addr_t bd_dma_addr; + size_t bd_size; + u16 __iomem *int_table; + u16 __iomem *int_curr; + dma_addr_t int_dma_addr; + size_t int_size; + struct list_head chan_head; + struct qmc_chan *chans[64]; +}; + +static inline void qmc_write16(void *__iomem addr, u16 val) +{ + iowrite16be(val, addr); +} + +static inline u16 qmc_read16(void *__iomem addr) +{ + return ioread16be(addr); +} + +static inline void qmc_setbits16(void *__iomem addr, u16 set) +{ + qmc_write16(addr, qmc_read16(addr) | set); +} + +static inline void qmc_clrbits16(void *__iomem addr, u16 clr) +{ + qmc_write16(addr, qmc_read16(addr) & ~clr); +} + +static inline void qmc_write32(void *__iomem addr, u32 val) +{ + iowrite32be(val, addr); +} + +static inline u32 qmc_read32(void *__iomem addr) +{ + return ioread32be(addr); +} + +static inline void qmc_setbits32(void *__iomem addr, u32 set) +{ + qmc_write32(addr, qmc_read32(addr) | set); +} + + +int qmc_chan_get_info(struct qmc_chan *chan, struct qmc_chan_info *info) +{ + struct tsa_serial_info tsa_info; + int ret; + + /* Retrieve info from the TSA related serial */ + ret = tsa_serial_get_info(chan->qmc->tsa_serial, &tsa_info); + if (ret) + return ret; + + info->mode = chan->mode; + info->rx_fs_rate = tsa_info.rx_fs_rate; + info->rx_bit_rate = tsa_info.rx_bit_rate; + info->nb_tx_ts = hweight64(chan->tx_ts_mask); + info->tx_fs_rate = tsa_info.tx_fs_rate; + info->tx_bit_rate = tsa_info.tx_bit_rate; + info->nb_rx_ts = hweight64(chan->rx_ts_mask); + + return 0; +} +EXPORT_SYMBOL(qmc_chan_get_info); + +int qmc_chan_set_param(struct qmc_chan *chan, const struct qmc_chan_param *param) +{ + if (param->mode != chan->mode) + return -EINVAL; + + switch (param->mode) { + case QMC_HDLC: + if ((param->hdlc.max_rx_buf_size % 4) || + (param->hdlc.max_rx_buf_size < 8)) + return -EINVAL; + + qmc_write16(chan->qmc->scc_pram + QMC_GBL_MRBLR, + param->hdlc.max_rx_buf_size - 8); + qmc_write16(chan->s_param + QMC_SPE_MFLR, + param->hdlc.max_rx_frame_size); + if (param->hdlc.is_crc32) { + qmc_setbits16(chan->s_param + QMC_SPE_CHAMR, + QMC_SPE_CHAMR_HDLC_CRC); + } else { + qmc_clrbits16(chan->s_param + QMC_SPE_CHAMR, + QMC_SPE_CHAMR_HDLC_CRC); + } + break; + + case QMC_TRANSPARENT: + qmc_write16(chan->s_param + QMC_SPE_TMRBLR, + param->transp.max_rx_buf_size); + break; + + default: + return -EINVAL; + } + + return 0; +} +EXPORT_SYMBOL(qmc_chan_set_param); + +int qmc_chan_write_submit(struct qmc_chan *chan, dma_addr_t addr, size_t length, + void (*complete)(void *context), void *context) +{ + struct qmc_xfer_desc *xfer_desc; + unsigned long flags; + cbd_t *__iomem bd; + u16 ctrl; + int ret; + + /* + * R bit UB bit + * 0 0 : The BD is free + * 1 1 : The BD is in used, waiting for transfer + * 0 1 : The BD is in used, waiting for completion + * 1 0 : Should not append + */ + + spin_lock_irqsave(&chan->tx_lock, flags); + bd = chan->txbd_free; + + ctrl = qmc_read16(&bd->cbd_sc); + if (ctrl & (QMC_BD_TX_R | QMC_BD_TX_UB)) { + /* We are full ... */ + ret = -EBUSY; + goto end; + } + + qmc_write16(&bd->cbd_datlen, length); + qmc_write32(&bd->cbd_bufaddr, addr); + + xfer_desc = &chan->tx_desc[bd - chan->txbds]; + xfer_desc->tx_complete = complete; + xfer_desc->context = context; + + /* Activate the descriptor */ + ctrl |= (QMC_BD_TX_R | QMC_BD_TX_UB); + wmb(); /* Be sure to flush the descriptor before control update */ + qmc_write16(&bd->cbd_sc, ctrl); + + if (!chan->is_tx_stopped) + qmc_setbits16(chan->s_param + QMC_SPE_CHAMR, QMC_SPE_CHAMR_POL); + + if (ctrl & QMC_BD_TX_W) + chan->txbd_free = chan->txbds; + else + chan->txbd_free++; + + ret = 0; + +end: + spin_unlock_irqrestore(&chan->tx_lock, flags); + return ret; +} +EXPORT_SYMBOL(qmc_chan_write_submit); + +static void qmc_chan_write_done(struct qmc_chan *chan) +{ + struct qmc_xfer_desc *xfer_desc; + void (*complete)(void *context); + unsigned long flags; + void *context; + cbd_t *__iomem bd; + u16 ctrl; + + /* + * R bit UB bit + * 0 0 : The BD is free + * 1 1 : The BD is in used, waiting for transfer + * 0 1 : The BD is in used, waiting for completion + * 1 0 : Should not append + */ + + spin_lock_irqsave(&chan->tx_lock, flags); + bd = chan->txbd_done; + + ctrl = qmc_read16(&bd->cbd_sc); + while (!(ctrl & QMC_BD_TX_R)) { + if (!(ctrl & QMC_BD_TX_UB)) + goto end; + + xfer_desc = &chan->tx_desc[bd - chan->txbds]; + complete = xfer_desc->tx_complete; + context = xfer_desc->context; + xfer_desc->tx_complete = NULL; + xfer_desc->context = NULL; + + qmc_write16(&bd->cbd_sc, ctrl & ~QMC_BD_TX_UB); + + if (ctrl & QMC_BD_TX_W) + chan->txbd_done = chan->txbds; + else + chan->txbd_done++; + + if (complete) { + spin_unlock_irqrestore(&chan->tx_lock, flags); + complete(context); + spin_lock_irqsave(&chan->tx_lock, flags); + } + + bd = chan->txbd_done; + ctrl = qmc_read16(&bd->cbd_sc); + } + +end: + spin_unlock_irqrestore(&chan->tx_lock, flags); +} + +int qmc_chan_read_submit(struct qmc_chan *chan, dma_addr_t addr, size_t length, + void (*complete)(void *context, size_t length), void *context) +{ + struct qmc_xfer_desc *xfer_desc; + unsigned long flags; + cbd_t *__iomem bd; + u16 ctrl; + int ret; + + /* + * E bit UB bit + * 0 0 : The BD is free + * 1 1 : The BD is in used, waiting for transfer + * 0 1 : The BD is in used, waiting for completion + * 1 0 : Should not append + */ + + spin_lock_irqsave(&chan->rx_lock, flags); + bd = chan->rxbd_free; + + ctrl = qmc_read16(&bd->cbd_sc); + if (ctrl & (QMC_BD_RX_E | QMC_BD_RX_UB)) { + /* We are full ... */ + ret = -EBUSY; + goto end; + } + + qmc_write16(&bd->cbd_datlen, 0); /* data length is updated by the QMC */ + qmc_write32(&bd->cbd_bufaddr, addr); + + xfer_desc = &chan->rx_desc[bd - chan->rxbds]; + xfer_desc->rx_complete = complete; + xfer_desc->context = context; + + /* Activate the descriptor */ + ctrl |= (QMC_BD_RX_E | QMC_BD_RX_UB); + wmb(); /* Be sure to flush data before descriptor activation */ + qmc_write16(&bd->cbd_sc, ctrl); + + /* Restart receiver if needed */ + if (chan->is_rx_halted && !chan->is_rx_stopped) { + /* Restart receiver */ + if (chan->mode == QMC_TRANSPARENT) + qmc_write32(chan->s_param + QMC_SPE_ZDSTATE, 0x18000080); + else + qmc_write32(chan->s_param + QMC_SPE_ZDSTATE, 0x00000080); + qmc_write32(chan->s_param + QMC_SPE_RSTATE, 0x31000000); + chan->is_rx_halted = false; + } + chan->rx_pending++; + + if (ctrl & QMC_BD_RX_W) + chan->rxbd_free = chan->rxbds; + else + chan->rxbd_free++; + + ret = 0; +end: + spin_unlock_irqrestore(&chan->rx_lock, flags); + return ret; +} +EXPORT_SYMBOL(qmc_chan_read_submit); + +static void qmc_chan_read_done(struct qmc_chan *chan) +{ + void (*complete)(void *context, size_t size); + struct qmc_xfer_desc *xfer_desc; + unsigned long flags; + cbd_t *__iomem bd; + void *context; + u16 datalen; + u16 ctrl; + + /* + * E bit UB bit + * 0 0 : The BD is free + * 1 1 : The BD is in used, waiting for transfer + * 0 1 : The BD is in used, waiting for completion + * 1 0 : Should not append + */ + + spin_lock_irqsave(&chan->rx_lock, flags); + bd = chan->rxbd_done; + + ctrl = qmc_read16(&bd->cbd_sc); + while (!(ctrl & QMC_BD_RX_E)) { + if (!(ctrl & QMC_BD_RX_UB)) + goto end; + + xfer_desc = &chan->rx_desc[bd - chan->rxbds]; + complete = xfer_desc->rx_complete; + context = xfer_desc->context; + xfer_desc->rx_complete = NULL; + xfer_desc->context = NULL; + + datalen = qmc_read16(&bd->cbd_datlen); + qmc_write16(&bd->cbd_sc, ctrl & ~QMC_BD_RX_UB); + + if (ctrl & QMC_BD_RX_W) + chan->rxbd_done = chan->rxbds; + else + chan->rxbd_done++; + + chan->rx_pending--; + + if (complete) { + spin_unlock_irqrestore(&chan->rx_lock, flags); + complete(context, datalen); + spin_lock_irqsave(&chan->rx_lock, flags); + } + + bd = chan->rxbd_done; + ctrl = qmc_read16(&bd->cbd_sc); + } + +end: + spin_unlock_irqrestore(&chan->rx_lock, flags); +} + +static int qmc_chan_command(struct qmc_chan *chan, u8 qmc_opcode) +{ + return cpm_command(chan->id << 2, (qmc_opcode << 4) | 0x0E); +} + +static int qmc_chan_stop_rx(struct qmc_chan *chan) +{ + unsigned long flags; + int ret; + + spin_lock_irqsave(&chan->rx_lock, flags); + + /* Send STOP RECEIVE command */ + ret = qmc_chan_command(chan, 0x0); + if (ret) { + dev_err(chan->qmc->dev, "chan %u: Send STOP RECEIVE failed (%d)\n", + chan->id, ret); + goto end; + } + + chan->is_rx_stopped = true; + +end: + spin_unlock_irqrestore(&chan->rx_lock, flags); + return ret; +} + +static int qmc_chan_stop_tx(struct qmc_chan *chan) +{ + unsigned long flags; + int ret; + + spin_lock_irqsave(&chan->tx_lock, flags); + + /* Send STOP TRANSMIT command */ + ret = qmc_chan_command(chan, 0x1); + if (ret) { + dev_err(chan->qmc->dev, "chan %u: Send STOP TRANSMIT failed (%d)\n", + chan->id, ret); + goto end; + } + + chan->is_tx_stopped = true; + +end: + spin_unlock_irqrestore(&chan->tx_lock, flags); + return ret; +} + +int qmc_chan_stop(struct qmc_chan *chan, int direction) +{ + int ret; + + if (direction & QMC_CHAN_READ) { + ret = qmc_chan_stop_rx(chan); + if (ret) + return ret; + } + + if (direction & QMC_CHAN_WRITE) { + ret = qmc_chan_stop_tx(chan); + if (ret) + return ret; + } + + return 0; +} +EXPORT_SYMBOL(qmc_chan_stop); + +static void qmc_chan_start_rx(struct qmc_chan *chan) +{ + unsigned long flags; + + spin_lock_irqsave(&chan->rx_lock, flags); + + /* Restart the receiver */ + if (chan->mode == QMC_TRANSPARENT) + qmc_write32(chan->s_param + QMC_SPE_ZDSTATE, 0x18000080); + else + qmc_write32(chan->s_param + QMC_SPE_ZDSTATE, 0x00000080); + qmc_write32(chan->s_param + QMC_SPE_RSTATE, 0x31000000); + chan->is_rx_halted = false; + + chan->is_rx_stopped = false; + + spin_unlock_irqrestore(&chan->rx_lock, flags); +} + +static void qmc_chan_start_tx(struct qmc_chan *chan) +{ + unsigned long flags; + + spin_lock_irqsave(&chan->tx_lock, flags); + + /* + * Enable channel transmitter as it could be disabled if + * qmc_chan_reset() was called. + */ + qmc_setbits16(chan->s_param + QMC_SPE_CHAMR, QMC_SPE_CHAMR_ENT); + + /* Set the POL bit in the channel mode register */ + qmc_setbits16(chan->s_param + QMC_SPE_CHAMR, QMC_SPE_CHAMR_POL); + + chan->is_tx_stopped = false; + + spin_unlock_irqrestore(&chan->tx_lock, flags); +} + +int qmc_chan_start(struct qmc_chan *chan, int direction) +{ + if (direction & QMC_CHAN_READ) + qmc_chan_start_rx(chan); + + if (direction & QMC_CHAN_WRITE) + qmc_chan_start_tx(chan); + + return 0; +} +EXPORT_SYMBOL(qmc_chan_start); + +static void qmc_chan_reset_rx(struct qmc_chan *chan) +{ + struct qmc_xfer_desc *xfer_desc; + unsigned long flags; + cbd_t *__iomem bd; + u16 ctrl; + + spin_lock_irqsave(&chan->rx_lock, flags); + bd = chan->rxbds; + do { + ctrl = qmc_read16(&bd->cbd_sc); + qmc_write16(&bd->cbd_sc, ctrl & ~(QMC_BD_RX_UB | QMC_BD_RX_E)); + + xfer_desc = &chan->rx_desc[bd - chan->rxbds]; + xfer_desc->rx_complete = NULL; + xfer_desc->context = NULL; + + bd++; + } while (!(ctrl & QMC_BD_RX_W)); + + chan->rxbd_free = chan->rxbds; + chan->rxbd_done = chan->rxbds; + qmc_write16(chan->s_param + QMC_SPE_RBPTR, + qmc_read16(chan->s_param + QMC_SPE_RBASE)); + + chan->rx_pending = 0; + chan->is_rx_stopped = false; + + spin_unlock_irqrestore(&chan->rx_lock, flags); +} + +static void qmc_chan_reset_tx(struct qmc_chan *chan) +{ + struct qmc_xfer_desc *xfer_desc; + unsigned long flags; + cbd_t *__iomem bd; + u16 ctrl; + + spin_lock_irqsave(&chan->tx_lock, flags); + + /* Disable transmitter. It will be re-enable on qmc_chan_start() */ + qmc_clrbits16(chan->s_param + QMC_SPE_CHAMR, QMC_SPE_CHAMR_ENT); + + bd = chan->txbds; + do { + ctrl = qmc_read16(&bd->cbd_sc); + qmc_write16(&bd->cbd_sc, ctrl & ~(QMC_BD_TX_UB | QMC_BD_TX_R)); + + xfer_desc = &chan->tx_desc[bd - chan->txbds]; + xfer_desc->tx_complete = NULL; + xfer_desc->context = NULL; + + bd++; + } while (!(ctrl & QMC_BD_TX_W)); + + chan->txbd_free = chan->txbds; + chan->txbd_done = chan->txbds; + qmc_write16(chan->s_param + QMC_SPE_TBPTR, + qmc_read16(chan->s_param + QMC_SPE_TBASE)); + + /* Reset TSTATE and ZISTATE to their initial value */ + qmc_write32(chan->s_param + QMC_SPE_TSTATE, 0x30000000); + qmc_write32(chan->s_param + QMC_SPE_ZISTATE, 0x00000100); + + spin_unlock_irqrestore(&chan->tx_lock, flags); +} + +int qmc_chan_reset(struct qmc_chan *chan, int direction) +{ + if (direction & QMC_CHAN_READ) + qmc_chan_reset_rx(chan); + + if (direction & QMC_CHAN_WRITE) + qmc_chan_reset_tx(chan); + + return 0; +} +EXPORT_SYMBOL(qmc_chan_reset); + +static int qmc_check_chans(struct qmc *qmc) +{ + struct tsa_serial_info info; + bool is_one_table = false; + struct qmc_chan *chan; + u64 tx_ts_mask = 0; + u64 rx_ts_mask = 0; + u64 tx_ts_assigned_mask; + u64 rx_ts_assigned_mask; + int ret; + + /* Retrieve info from the TSA related serial */ + ret = tsa_serial_get_info(qmc->tsa_serial, &info); + if (ret) + return ret; + + if ((info.nb_tx_ts > 64) || (info.nb_rx_ts > 64)) { + dev_err(qmc->dev, "Number of TSA Tx/Rx TS assigned not supported\n"); + return -EINVAL; + } + + /* + * If more than 32 TS are assigned to this serial, one common table is + * used for Tx and Rx and so masks must be equal for all channels. + */ + if ((info.nb_tx_ts > 32) || (info.nb_rx_ts > 32)) { + if (info.nb_tx_ts != info.nb_rx_ts) { + dev_err(qmc->dev, "Number of TSA Tx/Rx TS assigned are not equal\n"); + return -EINVAL; + } + is_one_table = true; + } + + tx_ts_assigned_mask = info.nb_tx_ts == 64 ? U64_MAX : (((u64)1) << info.nb_tx_ts) - 1; + rx_ts_assigned_mask = info.nb_rx_ts == 64 ? U64_MAX : (((u64)1) << info.nb_rx_ts) - 1; + + list_for_each_entry(chan, &qmc->chan_head, list) { + if (chan->tx_ts_mask > tx_ts_assigned_mask) { + dev_err(qmc->dev, "chan %u uses TSA unassigned Tx TS\n", chan->id); + return -EINVAL; + } + if (tx_ts_mask & chan->tx_ts_mask) { + dev_err(qmc->dev, "chan %u uses an already used Tx TS\n", chan->id); + return -EINVAL; + } + + if (chan->rx_ts_mask > rx_ts_assigned_mask) { + dev_err(qmc->dev, "chan %u uses TSA unassigned Rx TS\n", chan->id); + return -EINVAL; + } + if (rx_ts_mask & chan->rx_ts_mask) { + dev_err(qmc->dev, "chan %u uses an already used Rx TS\n", chan->id); + return -EINVAL; + } + + if (is_one_table && (chan->tx_ts_mask != chan->rx_ts_mask)) { + dev_err(qmc->dev, "chan %u uses different Rx and Tx TS\n", chan->id); + return -EINVAL; + } + + tx_ts_mask |= chan->tx_ts_mask; + rx_ts_mask |= chan->rx_ts_mask; + } + + return 0; +} + +static unsigned int qmc_nb_chans(struct qmc *qmc) +{ + unsigned int count = 0; + struct qmc_chan *chan; + + list_for_each_entry(chan, &qmc->chan_head, list) + count++; + + return count; +} + +static int qmc_of_parse_chans(struct qmc *qmc, struct device_node *np) +{ + struct device_node *chan_np; + struct qmc_chan *chan; + const char *mode; + u32 chan_id; + u64 ts_mask; + int ret; + + for_each_available_child_of_node(np, chan_np) { + ret = of_property_read_u32(chan_np, "reg", &chan_id); + if (ret) { + dev_err(qmc->dev, "%pOF: failed to read reg\n", chan_np); + of_node_put(chan_np); + return ret; + } + if (chan_id > 63) { + dev_err(qmc->dev, "%pOF: Invalid chan_id\n", chan_np); + of_node_put(chan_np); + return -EINVAL; + } + + chan = devm_kzalloc(qmc->dev, sizeof(*chan), GFP_KERNEL); + if (!chan) { + of_node_put(chan_np); + return -ENOMEM; + } + + chan->id = chan_id; + spin_lock_init(&chan->rx_lock); + spin_lock_init(&chan->tx_lock); + + ret = of_property_read_u64(chan_np, "fsl,tx-ts-mask", &ts_mask); + if (ret) { + dev_err(qmc->dev, "%pOF: failed to read fsl,tx-ts-mask\n", + chan_np); + of_node_put(chan_np); + return ret; + } + chan->tx_ts_mask = ts_mask; + + ret = of_property_read_u64(chan_np, "fsl,rx-ts-mask", &ts_mask); + if (ret) { + dev_err(qmc->dev, "%pOF: failed to read fsl,rx-ts-mask\n", + chan_np); + of_node_put(chan_np); + return ret; + } + chan->rx_ts_mask = ts_mask; + + mode = "transparent"; + ret = of_property_read_string(chan_np, "fsl,operational-mode", &mode); + if (ret && ret != -EINVAL) { + dev_err(qmc->dev, "%pOF: failed to read fsl,operational-mode\n", + chan_np); + of_node_put(chan_np); + return ret; + } + if (!strcmp(mode, "transparent")) { + chan->mode = QMC_TRANSPARENT; + } else if (!strcmp(mode, "hdlc")) { + chan->mode = QMC_HDLC; + } else { + dev_err(qmc->dev, "%pOF: Invalid fsl,operational-mode (%s)\n", + chan_np, mode); + of_node_put(chan_np); + return -EINVAL; + } + + chan->is_reverse_data = of_property_read_bool(chan_np, + "fsl,reverse-data"); + + list_add_tail(&chan->list, &qmc->chan_head); + qmc->chans[chan->id] = chan; + } + + return qmc_check_chans(qmc); +} + +static int qmc_setup_tsa_64rxtx(struct qmc *qmc, const struct tsa_serial_info *info) +{ + struct qmc_chan *chan; + unsigned int i; + u16 val; + + /* + * Use a common Tx/Rx 64 entries table. + * Everything was previously checked, Tx and Rx related stuffs are + * identical -> Used Rx related stuff to build the table + */ + + /* Invalidate all entries */ + for (i = 0; i < 64; i++) + qmc_write16(qmc->scc_pram + QMC_GBL_TSATRX + (i * 2), 0x0000); + + /* Set entries based on Rx stuff*/ + list_for_each_entry(chan, &qmc->chan_head, list) { + for (i = 0; i < info->nb_rx_ts; i++) { + if (!(chan->rx_ts_mask & (((u64)1) << i))) + continue; + + val = QMC_TSA_VALID | QMC_TSA_MASK | + QMC_TSA_CHANNEL(chan->id); + qmc_write16(qmc->scc_pram + QMC_GBL_TSATRX + (i * 2), val); + } + } + + /* Set Wrap bit on last entry */ + qmc_setbits16(qmc->scc_pram + QMC_GBL_TSATRX + ((info->nb_rx_ts - 1) * 2), + QMC_TSA_WRAP); + + /* Init pointers to the table */ + val = qmc->scc_pram_offset + QMC_GBL_TSATRX; + qmc_write16(qmc->scc_pram + QMC_GBL_RX_S_PTR, val); + qmc_write16(qmc->scc_pram + QMC_GBL_RXPTR, val); + qmc_write16(qmc->scc_pram + QMC_GBL_TX_S_PTR, val); + qmc_write16(qmc->scc_pram + QMC_GBL_TXPTR, val); + + return 0; +} + +static int qmc_setup_tsa_32rx_32tx(struct qmc *qmc, const struct tsa_serial_info *info) +{ + struct qmc_chan *chan; + unsigned int i; + u16 val; + + /* + * Use a Tx 32 entries table and a Rx 32 entries table. + * Everything was previously checked. + */ + + /* Invalidate all entries */ + for (i = 0; i < 32; i++) { + qmc_write16(qmc->scc_pram + QMC_GBL_TSATRX + (i * 2), 0x0000); + qmc_write16(qmc->scc_pram + QMC_GBL_TSATTX + (i * 2), 0x0000); + } + + /* Set entries based on Rx and Tx stuff*/ + list_for_each_entry(chan, &qmc->chan_head, list) { + /* Rx part */ + for (i = 0; i < info->nb_rx_ts; i++) { + if (!(chan->rx_ts_mask & (((u64)1) << i))) + continue; + + val = QMC_TSA_VALID | QMC_TSA_MASK | + QMC_TSA_CHANNEL(chan->id); + qmc_write16(qmc->scc_pram + QMC_GBL_TSATRX + (i * 2), val); + } + /* Tx part */ + for (i = 0; i < info->nb_tx_ts; i++) { + if (!(chan->tx_ts_mask & (((u64)1) << i))) + continue; + + val = QMC_TSA_VALID | QMC_TSA_MASK | + QMC_TSA_CHANNEL(chan->id); + qmc_write16(qmc->scc_pram + QMC_GBL_TSATTX + (i * 2), val); + } + } + + /* Set Wrap bit on last entries */ + qmc_setbits16(qmc->scc_pram + QMC_GBL_TSATRX + ((info->nb_rx_ts - 1) * 2), + QMC_TSA_WRAP); + qmc_setbits16(qmc->scc_pram + QMC_GBL_TSATTX + ((info->nb_tx_ts - 1) * 2), + QMC_TSA_WRAP); + + /* Init Rx pointers ...*/ + val = qmc->scc_pram_offset + QMC_GBL_TSATRX; + qmc_write16(qmc->scc_pram + QMC_GBL_RX_S_PTR, val); + qmc_write16(qmc->scc_pram + QMC_GBL_RXPTR, val); + + /* ... and Tx pointers */ + val = qmc->scc_pram_offset + QMC_GBL_TSATTX; + qmc_write16(qmc->scc_pram + QMC_GBL_TX_S_PTR, val); + qmc_write16(qmc->scc_pram + QMC_GBL_TXPTR, val); + + return 0; +} + +static int qmc_setup_tsa(struct qmc *qmc) +{ + struct tsa_serial_info info; + int ret; + + /* Retrieve info from the TSA related serial */ + ret = tsa_serial_get_info(qmc->tsa_serial, &info); + if (ret) + return ret; + + /* + * Setup one common 64 entries table or two 32 entries (one for Tx and + * one for Tx) according to assigned TS numbers. + */ + return ((info.nb_tx_ts > 32) || (info.nb_rx_ts > 32)) ? + qmc_setup_tsa_64rxtx(qmc, &info) : + qmc_setup_tsa_32rx_32tx(qmc, &info); +} + +static int qmc_setup_chan_trnsync(struct qmc *qmc, struct qmc_chan *chan) +{ + struct tsa_serial_info info; + u16 first_rx, last_tx; + u16 trnsync; + int ret; + + /* Retrieve info from the TSA related serial */ + ret = tsa_serial_get_info(chan->qmc->tsa_serial, &info); + if (ret) + return ret; + + /* Find the first Rx TS allocated to the channel */ + first_rx = chan->rx_ts_mask ? __ffs64(chan->rx_ts_mask) + 1 : 0; + + /* Find the last Tx TS allocated to the channel */ + last_tx = fls64(chan->tx_ts_mask); + + trnsync = 0; + if (info.nb_rx_ts) + trnsync |= QMC_SPE_TRNSYNC_RX((first_rx % info.nb_rx_ts) * 2); + if (info.nb_tx_ts) + trnsync |= QMC_SPE_TRNSYNC_TX((last_tx % info.nb_tx_ts) * 2); + + qmc_write16(chan->s_param + QMC_SPE_TRNSYNC, trnsync); + + dev_dbg(qmc->dev, "chan %u: trnsync=0x%04x, rx %u/%u 0x%llx, tx %u/%u 0x%llx\n", + chan->id, trnsync, + first_rx, info.nb_rx_ts, chan->rx_ts_mask, + last_tx, info.nb_tx_ts, chan->tx_ts_mask); + + return 0; +} + +static int qmc_setup_chan(struct qmc *qmc, struct qmc_chan *chan) +{ + unsigned int i; + cbd_t __iomem *bd; + int ret; + u16 val; + + chan->qmc = qmc; + + /* Set channel specific parameter base address */ + chan->s_param = qmc->dpram + (chan->id * 64); + /* 16 bd per channel (8 rx and 8 tx) */ + chan->txbds = qmc->bd_table + (chan->id * (QMC_NB_TXBDS + QMC_NB_RXBDS)); + chan->rxbds = qmc->bd_table + (chan->id * (QMC_NB_TXBDS + QMC_NB_RXBDS)) + QMC_NB_TXBDS; + + chan->txbd_free = chan->txbds; + chan->txbd_done = chan->txbds; + chan->rxbd_free = chan->rxbds; + chan->rxbd_done = chan->rxbds; + + /* TBASE and TBPTR*/ + val = chan->id * (QMC_NB_TXBDS + QMC_NB_RXBDS) * sizeof(cbd_t); + qmc_write16(chan->s_param + QMC_SPE_TBASE, val); + qmc_write16(chan->s_param + QMC_SPE_TBPTR, val); + + /* RBASE and RBPTR*/ + val = ((chan->id * (QMC_NB_TXBDS + QMC_NB_RXBDS)) + QMC_NB_TXBDS) * sizeof(cbd_t); + qmc_write16(chan->s_param + QMC_SPE_RBASE, val); + qmc_write16(chan->s_param + QMC_SPE_RBPTR, val); + qmc_write32(chan->s_param + QMC_SPE_TSTATE, 0x30000000); + qmc_write32(chan->s_param + QMC_SPE_RSTATE, 0x31000000); + qmc_write32(chan->s_param + QMC_SPE_ZISTATE, 0x00000100); + if (chan->mode == QMC_TRANSPARENT) { + qmc_write32(chan->s_param + QMC_SPE_ZDSTATE, 0x18000080); + qmc_write16(chan->s_param + QMC_SPE_TMRBLR, 60); + val = QMC_SPE_CHAMR_MODE_TRANSP | QMC_SPE_CHAMR_TRANSP_SYNC; + if (chan->is_reverse_data) + val |= QMC_SPE_CHAMR_TRANSP_RD; + qmc_write16(chan->s_param + QMC_SPE_CHAMR, val); + ret = qmc_setup_chan_trnsync(qmc, chan); + if (ret) + return ret; + } else { + qmc_write32(chan->s_param + QMC_SPE_ZDSTATE, 0x00000080); + qmc_write16(chan->s_param + QMC_SPE_MFLR, 60); + qmc_write16(chan->s_param + QMC_SPE_CHAMR, + QMC_SPE_CHAMR_MODE_HDLC | QMC_SPE_CHAMR_HDLC_IDLM); + } + + /* Do not enable interrupts now. They will be enabled later */ + qmc_write16(chan->s_param + QMC_SPE_INTMSK, 0x0000); + + /* Init Rx BDs and set Wrap bit on last descriptor */ + BUILD_BUG_ON(QMC_NB_RXBDS == 0); + val = QMC_BD_RX_I; + for (i = 0; i < QMC_NB_RXBDS; i++) { + bd = chan->rxbds + i; + qmc_write16(&bd->cbd_sc, val); + } + bd = chan->rxbds + QMC_NB_RXBDS - 1; + qmc_write16(&bd->cbd_sc, val | QMC_BD_RX_W); + + /* Init Tx BDs and set Wrap bit on last descriptor */ + BUILD_BUG_ON(QMC_NB_TXBDS == 0); + val = QMC_BD_TX_I; + if (chan->mode == QMC_HDLC) + val |= QMC_BD_TX_L | QMC_BD_TX_TC; + for (i = 0; i < QMC_NB_TXBDS; i++) { + bd = chan->txbds + i; + qmc_write16(&bd->cbd_sc, val); + } + bd = chan->txbds + QMC_NB_TXBDS - 1; + qmc_write16(&bd->cbd_sc, val | QMC_BD_TX_W); + + return 0; +} + +static int qmc_setup_chans(struct qmc *qmc) +{ + struct qmc_chan *chan; + int ret; + + list_for_each_entry(chan, &qmc->chan_head, list) { + ret = qmc_setup_chan(qmc, chan); + if (ret) + return ret; + } + + return 0; +} + +static int qmc_finalize_chans(struct qmc *qmc) +{ + struct qmc_chan *chan; + int ret; + + list_for_each_entry(chan, &qmc->chan_head, list) { + /* Unmask channel interrupts */ + if (chan->mode == QMC_HDLC) { + qmc_write16(chan->s_param + QMC_SPE_INTMSK, + QMC_INT_NID | QMC_INT_IDL | QMC_INT_MRF | + QMC_INT_UN | QMC_INT_RXF | QMC_INT_BSY | + QMC_INT_TXB | QMC_INT_RXB); + } else { + qmc_write16(chan->s_param + QMC_SPE_INTMSK, + QMC_INT_UN | QMC_INT_BSY | + QMC_INT_TXB | QMC_INT_RXB); + } + + /* Forced stop the channel */ + ret = qmc_chan_stop(chan, QMC_CHAN_ALL); + if (ret) + return ret; + } + + return 0; +} + +static int qmc_setup_ints(struct qmc *qmc) +{ + unsigned int i; + u16 __iomem *last; + + /* Raz all entries */ + for (i = 0; i < (qmc->int_size / sizeof(u16)); i++) + qmc_write16(qmc->int_table + i, 0x0000); + + /* Set Wrap bit on last entry */ + if (qmc->int_size >= sizeof(u16)) { + last = qmc->int_table + (qmc->int_size / sizeof(u16)) - 1; + qmc_write16(last, QMC_INT_W); + } + + return 0; +} + +static void qmc_irq_gint(struct qmc *qmc) +{ + struct qmc_chan *chan; + unsigned int chan_id; + unsigned long flags; + u16 int_entry; + + int_entry = qmc_read16(qmc->int_curr); + while (int_entry & QMC_INT_V) { + /* Clear all but the Wrap bit */ + qmc_write16(qmc->int_curr, int_entry & QMC_INT_W); + + chan_id = QMC_INT_GET_CHANNEL(int_entry); + chan = qmc->chans[chan_id]; + if (!chan) { + dev_err(qmc->dev, "interrupt on invalid chan %u\n", chan_id); + goto int_next; + } + + if (int_entry & QMC_INT_TXB) + qmc_chan_write_done(chan); + + if (int_entry & QMC_INT_UN) { + dev_info(qmc->dev, "intr chan %u, 0x%04x (UN)\n", chan_id, + int_entry); + chan->nb_tx_underrun++; + } + + if (int_entry & QMC_INT_BSY) { + dev_info(qmc->dev, "intr chan %u, 0x%04x (BSY)\n", chan_id, + int_entry); + chan->nb_rx_busy++; + /* Restart the receiver if needed */ + spin_lock_irqsave(&chan->rx_lock, flags); + if (chan->rx_pending && !chan->is_rx_stopped) { + if (chan->mode == QMC_TRANSPARENT) + qmc_write32(chan->s_param + QMC_SPE_ZDSTATE, 0x18000080); + else + qmc_write32(chan->s_param + QMC_SPE_ZDSTATE, 0x00000080); + qmc_write32(chan->s_param + QMC_SPE_RSTATE, 0x31000000); + chan->is_rx_halted = false; + } else { + chan->is_rx_halted = true; + } + spin_unlock_irqrestore(&chan->rx_lock, flags); + } + + if (int_entry & QMC_INT_RXB) + qmc_chan_read_done(chan); + +int_next: + if (int_entry & QMC_INT_W) + qmc->int_curr = qmc->int_table; + else + qmc->int_curr++; + int_entry = qmc_read16(qmc->int_curr); + } +} + +static irqreturn_t qmc_irq_handler(int irq, void *priv) +{ + struct qmc *qmc = (struct qmc *)priv; + u16 scce; + + scce = qmc_read16(qmc->scc_regs + SCC_SCCE); + qmc_write16(qmc->scc_regs + SCC_SCCE, scce); + + if (unlikely(scce & SCC_SCCE_IQOV)) + dev_info(qmc->dev, "IRQ queue overflow\n"); + + if (unlikely(scce & SCC_SCCE_GUN)) + dev_err(qmc->dev, "Global transmitter underrun\n"); + + if (unlikely(scce & SCC_SCCE_GOV)) + dev_err(qmc->dev, "Global receiver overrun\n"); + + /* normal interrupt */ + if (likely(scce & SCC_SCCE_GINT)) + qmc_irq_gint(qmc); + + return IRQ_HANDLED; +} + +static int qmc_probe(struct platform_device *pdev) +{ + struct device_node *np = pdev->dev.of_node; + unsigned int nb_chans; + struct resource *res; + struct qmc *qmc; + int irq; + int ret; + + qmc = devm_kzalloc(&pdev->dev, sizeof(*qmc), GFP_KERNEL); + if (!qmc) + return -ENOMEM; + + qmc->dev = &pdev->dev; + INIT_LIST_HEAD(&qmc->chan_head); + + qmc->scc_regs = devm_platform_ioremap_resource_byname(pdev, "scc_regs"); + if (IS_ERR(qmc->scc_regs)) + return PTR_ERR(qmc->scc_regs); + + + res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "scc_pram"); + if (!res) + return -EINVAL; + qmc->scc_pram_offset = res->start - get_immrbase(); + qmc->scc_pram = devm_ioremap_resource(qmc->dev, res); + if (IS_ERR(qmc->scc_pram)) + return PTR_ERR(qmc->scc_pram); + + qmc->dpram = devm_platform_ioremap_resource_byname(pdev, "dpram"); + if (IS_ERR(qmc->dpram)) + return PTR_ERR(qmc->dpram); + + qmc->tsa_serial = devm_tsa_serial_get_byphandle(qmc->dev, np, "fsl,tsa-serial"); + if (IS_ERR(qmc->tsa_serial)) { + return dev_err_probe(qmc->dev, PTR_ERR(qmc->tsa_serial), + "Failed to get TSA serial\n"); + } + + /* Connect the serial (SCC) to TSA */ + ret = tsa_serial_connect(qmc->tsa_serial); + if (ret) { + dev_err(qmc->dev, "Failed to connect TSA serial\n"); + return ret; + } + + /* Parse channels informationss */ + ret = qmc_of_parse_chans(qmc, np); + if (ret) + goto err_tsa_serial_disconnect; + + nb_chans = qmc_nb_chans(qmc); + + /* Init GMSR_H and GMSR_L registers */ + qmc_write32(qmc->scc_regs + SCC_GSMRH, + SCC_GSMRH_CDS | SCC_GSMRH_CTSS | SCC_GSMRH_CDP | SCC_GSMRH_CTSP); + + /* enable QMC mode */ + qmc_write32(qmc->scc_regs + SCC_GSMRL, SCC_GSMRL_MODE_QMC); + + /* + * Allocate the buffer descriptor table + * 8 rx and 8 tx descriptors per channel + */ + qmc->bd_size = (nb_chans * (QMC_NB_TXBDS + QMC_NB_RXBDS)) * sizeof(cbd_t); + qmc->bd_table = dmam_alloc_coherent(qmc->dev, qmc->bd_size, + &qmc->bd_dma_addr, GFP_KERNEL); + if (!qmc->bd_table) { + dev_err(qmc->dev, "Failed to allocate bd table\n"); + ret = -ENOMEM; + goto err_tsa_serial_disconnect; + } + memset(qmc->bd_table, 0, qmc->bd_size); + + qmc_write32(qmc->scc_pram + QMC_GBL_MCBASE, qmc->bd_dma_addr); + + /* Allocate the interrupt table */ + qmc->int_size = QMC_NB_INTS * sizeof(u16); + qmc->int_table = dmam_alloc_coherent(qmc->dev, qmc->int_size, + &qmc->int_dma_addr, GFP_KERNEL); + if (!qmc->int_table) { + dev_err(qmc->dev, "Failed to allocate interrupt table\n"); + ret = -ENOMEM; + goto err_tsa_serial_disconnect; + } + memset(qmc->int_table, 0, qmc->int_size); + + qmc->int_curr = qmc->int_table; + qmc_write32(qmc->scc_pram + QMC_GBL_INTBASE, qmc->int_dma_addr); + qmc_write32(qmc->scc_pram + QMC_GBL_INTPTR, qmc->int_dma_addr); + + /* Set MRBLR (valid for HDLC only) max MRU + max CRC */ + qmc_write16(qmc->scc_pram + QMC_GBL_MRBLR, HDLC_MAX_MRU + 4); + + qmc_write16(qmc->scc_pram + QMC_GBL_GRFTHR, 1); + qmc_write16(qmc->scc_pram + QMC_GBL_GRFCNT, 1); + + qmc_write32(qmc->scc_pram + QMC_GBL_C_MASK32, 0xDEBB20E3); + qmc_write16(qmc->scc_pram + QMC_GBL_C_MASK16, 0xF0B8); + + ret = qmc_setup_tsa(qmc); + if (ret) + goto err_tsa_serial_disconnect; + + qmc_write16(qmc->scc_pram + QMC_GBL_QMCSTATE, 0x8000); + + ret = qmc_setup_chans(qmc); + if (ret) + goto err_tsa_serial_disconnect; + + /* Init interrupts table */ + ret = qmc_setup_ints(qmc); + if (ret) + goto err_tsa_serial_disconnect; + + /* Disable and clear interrupts, set the irq handler */ + qmc_write16(qmc->scc_regs + SCC_SCCM, 0x0000); + qmc_write16(qmc->scc_regs + SCC_SCCE, 0x000F); + irq = platform_get_irq(pdev, 0); + if (irq < 0) + goto err_tsa_serial_disconnect; + ret = devm_request_irq(qmc->dev, irq, qmc_irq_handler, 0, "qmc", qmc); + if (ret < 0) + goto err_tsa_serial_disconnect; + + /* Enable interrupts */ + qmc_write16(qmc->scc_regs + SCC_SCCM, + SCC_SCCE_IQOV | SCC_SCCE_GINT | SCC_SCCE_GUN | SCC_SCCE_GOV); + + ret = qmc_finalize_chans(qmc); + if (ret < 0) + goto err_disable_intr; + + /* Enable transmiter and receiver */ + qmc_setbits32(qmc->scc_regs + SCC_GSMRL, SCC_GSMRL_ENR | SCC_GSMRL_ENT); + + platform_set_drvdata(pdev, qmc); + + return 0; + +err_disable_intr: + qmc_write16(qmc->scc_regs + SCC_SCCM, 0); + +err_tsa_serial_disconnect: + tsa_serial_disconnect(qmc->tsa_serial); + return ret; +} + +static int qmc_remove(struct platform_device *pdev) +{ + struct qmc *qmc = platform_get_drvdata(pdev); + + /* Disable transmiter and receiver */ + qmc_setbits32(qmc->scc_regs + SCC_GSMRL, 0); + + /* Disable interrupts */ + qmc_write16(qmc->scc_regs + SCC_SCCM, 0); + + /* Disconnect the serial from TSA */ + tsa_serial_disconnect(qmc->tsa_serial); + + return 0; +} + +static const struct of_device_id qmc_id_table[] = { + { .compatible = "fsl,cpm1-scc-qmc" }, + {} /* sentinel */ +}; +MODULE_DEVICE_TABLE(of, qmc_id_table); + +static struct platform_driver qmc_driver = { + .driver = { + .name = "fsl-qmc", + .of_match_table = of_match_ptr(qmc_id_table), + }, + .probe = qmc_probe, + .remove = qmc_remove, +}; +module_platform_driver(qmc_driver); + +struct qmc_chan *qmc_chan_get_byphandle(struct device_node *np, const char *phandle_name) +{ + struct of_phandle_args out_args; + struct platform_device *pdev; + struct qmc_chan *qmc_chan; + struct qmc *qmc; + int ret; + + ret = of_parse_phandle_with_fixed_args(np, phandle_name, 1, 0, + &out_args); + if (ret < 0) + return ERR_PTR(ret); + + if (!of_match_node(qmc_driver.driver.of_match_table, out_args.np)) { + of_node_put(out_args.np); + return ERR_PTR(-EINVAL); + } + + pdev = of_find_device_by_node(out_args.np); + of_node_put(out_args.np); + if (!pdev) + return ERR_PTR(-ENODEV); + + qmc = platform_get_drvdata(pdev); + if (!qmc) { + platform_device_put(pdev); + return ERR_PTR(-EPROBE_DEFER); + } + + if (out_args.args_count != 1) { + platform_device_put(pdev); + return ERR_PTR(-EINVAL); + } + + if (out_args.args[0] >= ARRAY_SIZE(qmc->chans)) { + platform_device_put(pdev); + return ERR_PTR(-EINVAL); + } + + qmc_chan = qmc->chans[out_args.args[0]]; + if (!qmc_chan) { + platform_device_put(pdev); + return ERR_PTR(-ENOENT); + } + + return qmc_chan; +} +EXPORT_SYMBOL(qmc_chan_get_byphandle); + +void qmc_chan_put(struct qmc_chan *chan) +{ + put_device(chan->qmc->dev); +} +EXPORT_SYMBOL(qmc_chan_put); + +static void devm_qmc_chan_release(struct device *dev, void *res) +{ + struct qmc_chan **qmc_chan = res; + + qmc_chan_put(*qmc_chan); +} + +struct qmc_chan *devm_qmc_chan_get_byphandle(struct device *dev, + struct device_node *np, + const char *phandle_name) +{ + struct qmc_chan *qmc_chan; + struct qmc_chan **dr; + + dr = devres_alloc(devm_qmc_chan_release, sizeof(*dr), GFP_KERNEL); + if (!dr) + return ERR_PTR(-ENOMEM); + + qmc_chan = qmc_chan_get_byphandle(np, phandle_name); + if (!IS_ERR(qmc_chan)) { + *dr = qmc_chan; + devres_add(dev, dr); + } else { + devres_free(dr); + } + + return qmc_chan; +} +EXPORT_SYMBOL(devm_qmc_chan_get_byphandle); + +MODULE_AUTHOR("Herve Codina <herve.codina@bootlin.com>"); +MODULE_DESCRIPTION("CPM QMC driver"); +MODULE_LICENSE("GPL"); diff --git a/drivers/soc/fsl/qe/tsa.c b/drivers/soc/fsl/qe/tsa.c new file mode 100644 index 000000000000..3646153117b3 --- /dev/null +++ b/drivers/soc/fsl/qe/tsa.c @@ -0,0 +1,846 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * TSA driver + * + * Copyright 2022 CS GROUP France + * + * Author: Herve Codina <herve.codina@bootlin.com> + */ + +#include "tsa.h" +#include <dt-bindings/soc/cpm1-fsl,tsa.h> +#include <linux/clk.h> +#include <linux/io.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/of_platform.h> +#include <linux/platform_device.h> +#include <linux/slab.h> + + +/* TSA SI RAM routing tables entry */ +#define TSA_SIRAM_ENTRY_LAST (1 << 16) +#define TSA_SIRAM_ENTRY_BYTE (1 << 17) +#define TSA_SIRAM_ENTRY_CNT(x) (((x) & 0x0f) << 18) +#define TSA_SIRAM_ENTRY_CSEL_MASK (0x7 << 22) +#define TSA_SIRAM_ENTRY_CSEL_NU (0x0 << 22) +#define TSA_SIRAM_ENTRY_CSEL_SCC2 (0x2 << 22) +#define TSA_SIRAM_ENTRY_CSEL_SCC3 (0x3 << 22) +#define TSA_SIRAM_ENTRY_CSEL_SCC4 (0x4 << 22) +#define TSA_SIRAM_ENTRY_CSEL_SMC1 (0x5 << 22) +#define TSA_SIRAM_ENTRY_CSEL_SMC2 (0x6 << 22) + +/* SI mode register (32 bits) */ +#define TSA_SIMODE 0x00 +#define TSA_SIMODE_SMC2 0x80000000 +#define TSA_SIMODE_SMC1 0x00008000 +#define TSA_SIMODE_TDMA(x) ((x) << 0) +#define TSA_SIMODE_TDMB(x) ((x) << 16) +#define TSA_SIMODE_TDM_MASK 0x0fff +#define TSA_SIMODE_TDM_SDM_MASK 0x0c00 +#define TSA_SIMODE_TDM_SDM_NORM 0x0000 +#define TSA_SIMODE_TDM_SDM_ECHO 0x0400 +#define TSA_SIMODE_TDM_SDM_INTL_LOOP 0x0800 +#define TSA_SIMODE_TDM_SDM_LOOP_CTRL 0x0c00 +#define TSA_SIMODE_TDM_RFSD(x) ((x) << 8) +#define TSA_SIMODE_TDM_DSC 0x0080 +#define TSA_SIMODE_TDM_CRT 0x0040 +#define TSA_SIMODE_TDM_STZ 0x0020 +#define TSA_SIMODE_TDM_CE 0x0010 +#define TSA_SIMODE_TDM_FE 0x0008 +#define TSA_SIMODE_TDM_GM 0x0004 +#define TSA_SIMODE_TDM_TFSD(x) ((x) << 0) + +/* SI global mode register (8 bits) */ +#define TSA_SIGMR 0x04 +#define TSA_SIGMR_ENB (1<<3) +#define TSA_SIGMR_ENA (1<<2) +#define TSA_SIGMR_RDM_MASK 0x03 +#define TSA_SIGMR_RDM_STATIC_TDMA 0x00 +#define TSA_SIGMR_RDM_DYN_TDMA 0x01 +#define TSA_SIGMR_RDM_STATIC_TDMAB 0x02 +#define TSA_SIGMR_RDM_DYN_TDMAB 0x03 + +/* SI status register (8 bits) */ +#define TSA_SISTR 0x06 + +/* SI command register (8 bits) */ +#define TSA_SICMR 0x07 + +/* SI clock route register (32 bits) */ +#define TSA_SICR 0x0C +#define TSA_SICR_SCC2(x) ((x) << 8) +#define TSA_SICR_SCC3(x) ((x) << 16) +#define TSA_SICR_SCC4(x) ((x) << 24) +#define TSA_SICR_SCC_MASK 0x0ff +#define TSA_SICR_SCC_GRX (1 << 7) +#define TSA_SICR_SCC_SCX_TSA (1 << 6) +#define TSA_SICR_SCC_RXCS_MASK (0x7 << 3) +#define TSA_SICR_SCC_RXCS_BRG1 (0x0 << 3) +#define TSA_SICR_SCC_RXCS_BRG2 (0x1 << 3) +#define TSA_SICR_SCC_RXCS_BRG3 (0x2 << 3) +#define TSA_SICR_SCC_RXCS_BRG4 (0x3 << 3) +#define TSA_SICR_SCC_RXCS_CLK15 (0x4 << 3) +#define TSA_SICR_SCC_RXCS_CLK26 (0x5 << 3) +#define TSA_SICR_SCC_RXCS_CLK37 (0x6 << 3) +#define TSA_SICR_SCC_RXCS_CLK48 (0x7 << 3) +#define TSA_SICR_SCC_TXCS_MASK (0x7 << 0) +#define TSA_SICR_SCC_TXCS_BRG1 (0x0 << 0) +#define TSA_SICR_SCC_TXCS_BRG2 (0x1 << 0) +#define TSA_SICR_SCC_TXCS_BRG3 (0x2 << 0) +#define TSA_SICR_SCC_TXCS_BRG4 (0x3 << 0) +#define TSA_SICR_SCC_TXCS_CLK15 (0x4 << 0) +#define TSA_SICR_SCC_TXCS_CLK26 (0x5 << 0) +#define TSA_SICR_SCC_TXCS_CLK37 (0x6 << 0) +#define TSA_SICR_SCC_TXCS_CLK48 (0x7 << 0) + +/* Serial interface RAM pointer register (32 bits) */ +#define TSA_SIRP 0x10 + +struct tsa_entries_area { + void *__iomem entries_start; + void *__iomem entries_next; + void *__iomem last_entry; +}; + +struct tsa_tdm { + bool is_enable; + struct clk *l1rclk_clk; + struct clk *l1rsync_clk; + struct clk *l1tclk_clk; + struct clk *l1tsync_clk; + u32 simode_tdm; +}; + +#define TSA_TDMA 0 +#define TSA_TDMB 1 + +struct tsa { + struct device *dev; + void *__iomem si_regs; + void *__iomem si_ram; + resource_size_t si_ram_sz; + spinlock_t lock; + int tdms; /* TSA_TDMx ORed */ + struct tsa_tdm tdm[2]; /* TDMa and TDMb */ + struct tsa_serial { + unsigned int id; + struct tsa_serial_info info; + } serials[6]; +}; + +static inline struct tsa *tsa_serial_get_tsa(struct tsa_serial *tsa_serial) +{ + /* The serials table is indexed by the serial id */ + return container_of(tsa_serial, struct tsa, serials[tsa_serial->id]); +} + +static inline void tsa_write32(void *__iomem addr, u32 val) +{ + iowrite32be(val, addr); +} + +static inline void tsa_write8(void *__iomem addr, u32 val) +{ + iowrite8(val, addr); +} + +static inline u32 tsa_read32(void *__iomem addr) +{ + return ioread32be(addr); +} + +static inline void tsa_clrbits32(void *__iomem addr, u32 clr) +{ + tsa_write32(addr, tsa_read32(addr) & ~clr); +} + +static inline void tsa_clrsetbits32(void *__iomem addr, u32 clr, u32 set) +{ + tsa_write32(addr, (tsa_read32(addr) & ~clr) | set); +} + +int tsa_serial_connect(struct tsa_serial *tsa_serial) +{ + struct tsa *tsa = tsa_serial_get_tsa(tsa_serial); + unsigned long flags; + u32 clear; + u32 set; + + switch (tsa_serial->id) { + case FSL_CPM_TSA_SCC2: + clear = TSA_SICR_SCC2(TSA_SICR_SCC_MASK); + set = TSA_SICR_SCC2(TSA_SICR_SCC_SCX_TSA); + break; + case FSL_CPM_TSA_SCC3: + clear = TSA_SICR_SCC3(TSA_SICR_SCC_MASK); + set = TSA_SICR_SCC3(TSA_SICR_SCC_SCX_TSA); + break; + case FSL_CPM_TSA_SCC4: + clear = TSA_SICR_SCC4(TSA_SICR_SCC_MASK); + set = TSA_SICR_SCC4(TSA_SICR_SCC_SCX_TSA); + break; + default: + dev_err(tsa->dev, "Unsupported serial id %u\n", tsa_serial->id); + return -EINVAL; + } + + spin_lock_irqsave(&tsa->lock, flags); + tsa_clrsetbits32(tsa->si_regs + TSA_SICR, clear, set); + spin_unlock_irqrestore(&tsa->lock, flags); + + return 0; +} +EXPORT_SYMBOL(tsa_serial_connect); + +int tsa_serial_disconnect(struct tsa_serial *tsa_serial) +{ + struct tsa *tsa = tsa_serial_get_tsa(tsa_serial); + unsigned long flags; + u32 clear; + + switch (tsa_serial->id) { + case FSL_CPM_TSA_SCC2: + clear = TSA_SICR_SCC2(TSA_SICR_SCC_MASK); + break; + case FSL_CPM_TSA_SCC3: + clear = TSA_SICR_SCC3(TSA_SICR_SCC_MASK); + break; + case FSL_CPM_TSA_SCC4: + clear = TSA_SICR_SCC4(TSA_SICR_SCC_MASK); + break; + default: + dev_err(tsa->dev, "Unsupported serial id %u\n", tsa_serial->id); + return -EINVAL; + } + + spin_lock_irqsave(&tsa->lock, flags); + tsa_clrsetbits32(tsa->si_regs + TSA_SICR, clear, 0); + spin_unlock_irqrestore(&tsa->lock, flags); + + return 0; +} +EXPORT_SYMBOL(tsa_serial_disconnect); + +int tsa_serial_get_info(struct tsa_serial *tsa_serial, struct tsa_serial_info *info) +{ + memcpy(info, &tsa_serial->info, sizeof(*info)); + return 0; +} +EXPORT_SYMBOL(tsa_serial_get_info); + +static void tsa_init_entries_area(struct tsa *tsa, struct tsa_entries_area *area, + u32 tdms, u32 tdm_id, bool is_rx) +{ + resource_size_t quarter; + resource_size_t half; + + quarter = tsa->si_ram_sz/4; + half = tsa->si_ram_sz/2; + + if (tdms == BIT(TSA_TDMA)) { + /* Only TDMA */ + if (is_rx) { + /* First half of si_ram */ + area->entries_start = tsa->si_ram; + area->entries_next = area->entries_start + half; + area->last_entry = NULL; + } else { + /* Second half of si_ram */ + area->entries_start = tsa->si_ram + half; + area->entries_next = area->entries_start + half; + area->last_entry = NULL; + } + } else { + /* Only TDMB or both TDMs */ + if (tdm_id == TSA_TDMA) { + if (is_rx) { + /* First half of first half of si_ram */ + area->entries_start = tsa->si_ram; + area->entries_next = area->entries_start + quarter; + area->last_entry = NULL; + } else { + /* First half of second half of si_ram */ + area->entries_start = tsa->si_ram + (2 * quarter); + area->entries_next = area->entries_start + quarter; + area->last_entry = NULL; + } + } else { + if (is_rx) { + /* Second half of first half of si_ram */ + area->entries_start = tsa->si_ram + quarter; + area->entries_next = area->entries_start + quarter; + area->last_entry = NULL; + } else { + /* Second half of second half of si_ram */ + area->entries_start = tsa->si_ram + (3 * quarter); + area->entries_next = area->entries_start + quarter; + area->last_entry = NULL; + } + } + } +} + +static const char *tsa_serial_id2name(struct tsa *tsa, u32 serial_id) +{ + switch (serial_id) { + case FSL_CPM_TSA_NU: return "Not used"; + case FSL_CPM_TSA_SCC2: return "SCC2"; + case FSL_CPM_TSA_SCC3: return "SCC3"; + case FSL_CPM_TSA_SCC4: return "SCC4"; + case FSL_CPM_TSA_SMC1: return "SMC1"; + case FSL_CPM_TSA_SMC2: return "SMC2"; + default: + break; + } + return NULL; +} + +static u32 tsa_serial_id2csel(struct tsa *tsa, u32 serial_id) +{ + switch (serial_id) { + case FSL_CPM_TSA_SCC2: return TSA_SIRAM_ENTRY_CSEL_SCC2; + case FSL_CPM_TSA_SCC3: return TSA_SIRAM_ENTRY_CSEL_SCC3; + case FSL_CPM_TSA_SCC4: return TSA_SIRAM_ENTRY_CSEL_SCC4; + case FSL_CPM_TSA_SMC1: return TSA_SIRAM_ENTRY_CSEL_SMC1; + case FSL_CPM_TSA_SMC2: return TSA_SIRAM_ENTRY_CSEL_SMC2; + default: + break; + } + return TSA_SIRAM_ENTRY_CSEL_NU; +} + +static int tsa_add_entry(struct tsa *tsa, struct tsa_entries_area *area, + u32 count, u32 serial_id) +{ + void *__iomem addr; + u32 left; + u32 val; + u32 cnt; + u32 nb; + + addr = area->last_entry ? area->last_entry + 4 : area->entries_start; + + nb = DIV_ROUND_UP(count, 8); + if ((addr + (nb * 4)) > area->entries_next) { + dev_err(tsa->dev, "si ram area full\n"); + return -ENOSPC; + } + + if (area->last_entry) { + /* Clear last flag */ + tsa_clrbits32(area->last_entry, TSA_SIRAM_ENTRY_LAST); + } + + left = count; + while (left) { + val = TSA_SIRAM_ENTRY_BYTE | tsa_serial_id2csel(tsa, serial_id); + + if (left > 16) { + cnt = 16; + } else { + cnt = left; + val |= TSA_SIRAM_ENTRY_LAST; + area->last_entry = addr; + } + val |= TSA_SIRAM_ENTRY_CNT(cnt - 1); + + tsa_write32(addr, val); + addr += 4; + left -= cnt; + } + + return 0; +} + +static int tsa_of_parse_tdm_route(struct tsa *tsa, struct device_node *tdm_np, + u32 tdms, u32 tdm_id, bool is_rx) +{ + struct tsa_entries_area area; + const char *route_name; + u32 serial_id; + int len, i; + u32 count; + const char *serial_name; + struct tsa_serial_info *serial_info; + struct tsa_tdm *tdm; + int ret; + u32 ts; + + route_name = is_rx ? "fsl,rx-ts-routes" : "fsl,tx-ts-routes"; + + len = of_property_count_u32_elems(tdm_np, route_name); + if (len < 0) { + dev_err(tsa->dev, "%pOF: failed to read %s\n", tdm_np, route_name); + return len; + } + if (len % 2 != 0) { + dev_err(tsa->dev, "%pOF: wrong %s format\n", tdm_np, route_name); + return -EINVAL; + } + + tsa_init_entries_area(tsa, &area, tdms, tdm_id, is_rx); + ts = 0; + for (i = 0; i < len; i += 2) { + of_property_read_u32_index(tdm_np, route_name, i, &count); + of_property_read_u32_index(tdm_np, route_name, i + 1, &serial_id); + + if (serial_id >= ARRAY_SIZE(tsa->serials)) { + dev_err(tsa->dev, "%pOF: invalid serial id (%u)\n", + tdm_np, serial_id); + return -EINVAL; + } + + serial_name = tsa_serial_id2name(tsa, serial_id); + if (!serial_name) { + dev_err(tsa->dev, "%pOF: unsupported serial id (%u)\n", + tdm_np, serial_id); + return -EINVAL; + } + + dev_dbg(tsa->dev, "tdm_id=%u, %s ts %u..%u -> %s\n", + tdm_id, route_name, ts, ts+count-1, serial_name); + ts += count; + + ret = tsa_add_entry(tsa, &area, count, serial_id); + if (ret) + return ret; + + serial_info = &tsa->serials[serial_id].info; + tdm = &tsa->tdm[tdm_id]; + if (is_rx) { + serial_info->rx_fs_rate = clk_get_rate(tdm->l1rsync_clk); + serial_info->rx_bit_rate = clk_get_rate(tdm->l1rclk_clk); + serial_info->nb_rx_ts += count; + } else { + serial_info->tx_fs_rate = tdm->l1tsync_clk ? + clk_get_rate(tdm->l1tsync_clk) : + clk_get_rate(tdm->l1rsync_clk); + serial_info->tx_bit_rate = tdm->l1tclk_clk ? + clk_get_rate(tdm->l1tclk_clk) : + clk_get_rate(tdm->l1rclk_clk); + serial_info->nb_tx_ts += count; + } + } + return 0; +} + +static inline int tsa_of_parse_tdm_rx_route(struct tsa *tsa, + struct device_node *tdm_np, + u32 tdms, u32 tdm_id) +{ + return tsa_of_parse_tdm_route(tsa, tdm_np, tdms, tdm_id, true); +} + +static inline int tsa_of_parse_tdm_tx_route(struct tsa *tsa, + struct device_node *tdm_np, + u32 tdms, u32 tdm_id) +{ + return tsa_of_parse_tdm_route(tsa, tdm_np, tdms, tdm_id, false); +} + +static int tsa_of_parse_tdms(struct tsa *tsa, struct device_node *np) +{ + struct device_node *tdm_np; + struct tsa_tdm *tdm; + struct clk *clk; + u32 tdm_id, val; + int ret; + int i; + + tsa->tdms = 0; + tsa->tdm[0].is_enable = false; + tsa->tdm[1].is_enable = false; + + for_each_available_child_of_node(np, tdm_np) { + ret = of_property_read_u32(tdm_np, "reg", &tdm_id); + if (ret) { + dev_err(tsa->dev, "%pOF: failed to read reg\n", tdm_np); + of_node_put(tdm_np); + return ret; + } + switch (tdm_id) { + case 0: + tsa->tdms |= BIT(TSA_TDMA); + break; + case 1: + tsa->tdms |= BIT(TSA_TDMB); + break; + default: + dev_err(tsa->dev, "%pOF: Invalid tdm_id (%u)\n", tdm_np, + tdm_id); + of_node_put(tdm_np); + return -EINVAL; + } + } + + for_each_available_child_of_node(np, tdm_np) { + ret = of_property_read_u32(tdm_np, "reg", &tdm_id); + if (ret) { + dev_err(tsa->dev, "%pOF: failed to read reg\n", tdm_np); + of_node_put(tdm_np); + return ret; + } + + tdm = &tsa->tdm[tdm_id]; + tdm->simode_tdm = TSA_SIMODE_TDM_SDM_NORM; + + val = 0; + ret = of_property_read_u32(tdm_np, "fsl,rx-frame-sync-delay-bits", + &val); + if (ret && ret != -EINVAL) { + dev_err(tsa->dev, + "%pOF: failed to read fsl,rx-frame-sync-delay-bits\n", + tdm_np); + of_node_put(tdm_np); + return ret; + } + if (val > 3) { + dev_err(tsa->dev, + "%pOF: Invalid fsl,rx-frame-sync-delay-bits (%u)\n", + tdm_np, val); + of_node_put(tdm_np); + return -EINVAL; + } + tdm->simode_tdm |= TSA_SIMODE_TDM_RFSD(val); + + val = 0; + ret = of_property_read_u32(tdm_np, "fsl,tx-frame-sync-delay-bits", + &val); + if (ret && ret != -EINVAL) { + dev_err(tsa->dev, + "%pOF: failed to read fsl,tx-frame-sync-delay-bits\n", + tdm_np); + of_node_put(tdm_np); + return ret; + } + if (val > 3) { + dev_err(tsa->dev, + "%pOF: Invalid fsl,tx-frame-sync-delay-bits (%u)\n", + tdm_np, val); + of_node_put(tdm_np); + return -EINVAL; + } + tdm->simode_tdm |= TSA_SIMODE_TDM_TFSD(val); + + if (of_property_read_bool(tdm_np, "fsl,common-rxtx-pins")) + tdm->simode_tdm |= TSA_SIMODE_TDM_CRT; + + if (of_property_read_bool(tdm_np, "fsl,clock-falling-edge")) + tdm->simode_tdm |= TSA_SIMODE_TDM_CE; + + if (of_property_read_bool(tdm_np, "fsl,fsync-rising-edge")) + tdm->simode_tdm |= TSA_SIMODE_TDM_FE; + + if (of_property_read_bool(tdm_np, "fsl,double-speed-clock")) + tdm->simode_tdm |= TSA_SIMODE_TDM_DSC; + + clk = of_clk_get_by_name(tdm_np, "l1rsync"); + if (IS_ERR(clk)) { + ret = PTR_ERR(clk); + of_node_put(tdm_np); + goto err; + } + ret = clk_prepare_enable(clk); + if (ret) { + clk_put(clk); + of_node_put(tdm_np); + goto err; + } + tdm->l1rsync_clk = clk; + + clk = of_clk_get_by_name(tdm_np, "l1rclk"); + if (IS_ERR(clk)) { + ret = PTR_ERR(clk); + of_node_put(tdm_np); + goto err; + } + ret = clk_prepare_enable(clk); + if (ret) { + clk_put(clk); + of_node_put(tdm_np); + goto err; + } + tdm->l1rclk_clk = clk; + + if (!(tdm->simode_tdm & TSA_SIMODE_TDM_CRT)) { + clk = of_clk_get_by_name(tdm_np, "l1tsync"); + if (IS_ERR(clk)) { + ret = PTR_ERR(clk); + of_node_put(tdm_np); + goto err; + } + ret = clk_prepare_enable(clk); + if (ret) { + clk_put(clk); + of_node_put(tdm_np); + goto err; + } + tdm->l1tsync_clk = clk; + + clk = of_clk_get_by_name(tdm_np, "l1tclk"); + if (IS_ERR(clk)) { + ret = PTR_ERR(clk); + of_node_put(tdm_np); + goto err; + } + ret = clk_prepare_enable(clk); + if (ret) { + clk_put(clk); + of_node_put(tdm_np); + goto err; + } + tdm->l1tclk_clk = clk; + } + + ret = tsa_of_parse_tdm_rx_route(tsa, tdm_np, tsa->tdms, tdm_id); + if (ret) { + of_node_put(tdm_np); + goto err; + } + + ret = tsa_of_parse_tdm_tx_route(tsa, tdm_np, tsa->tdms, tdm_id); + if (ret) { + of_node_put(tdm_np); + goto err; + } + + tdm->is_enable = true; + } + return 0; + +err: + for (i = 0; i < 2; i++) { + if (tsa->tdm[i].l1rsync_clk) { + clk_disable_unprepare(tsa->tdm[i].l1rsync_clk); + clk_put(tsa->tdm[i].l1rsync_clk); + } + if (tsa->tdm[i].l1rclk_clk) { + clk_disable_unprepare(tsa->tdm[i].l1rclk_clk); + clk_put(tsa->tdm[i].l1rclk_clk); + } + if (tsa->tdm[i].l1tsync_clk) { + clk_disable_unprepare(tsa->tdm[i].l1rsync_clk); + clk_put(tsa->tdm[i].l1rsync_clk); + } + if (tsa->tdm[i].l1tclk_clk) { + clk_disable_unprepare(tsa->tdm[i].l1rclk_clk); + clk_put(tsa->tdm[i].l1rclk_clk); + } + } + return ret; +} + +static void tsa_init_si_ram(struct tsa *tsa) +{ + resource_size_t i; + + /* Fill all entries as the last one */ + for (i = 0; i < tsa->si_ram_sz; i += 4) + tsa_write32(tsa->si_ram + i, TSA_SIRAM_ENTRY_LAST); +} + +static int tsa_probe(struct platform_device *pdev) +{ + struct device_node *np = pdev->dev.of_node; + struct resource *res; + struct tsa *tsa; + unsigned int i; + u32 val; + int ret; + + tsa = devm_kzalloc(&pdev->dev, sizeof(*tsa), GFP_KERNEL); + if (!tsa) + return -ENOMEM; + + tsa->dev = &pdev->dev; + + for (i = 0; i < ARRAY_SIZE(tsa->serials); i++) + tsa->serials[i].id = i; + + spin_lock_init(&tsa->lock); + + tsa->si_regs = devm_platform_ioremap_resource_byname(pdev, "si_regs"); + if (IS_ERR(tsa->si_regs)) + return PTR_ERR(tsa->si_regs); + + res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "si_ram"); + if (!res) { + dev_err(tsa->dev, "si_ram resource missing\n"); + return -EINVAL; + } + tsa->si_ram_sz = resource_size(res); + tsa->si_ram = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(tsa->si_ram)) + return PTR_ERR(tsa->si_ram); + + tsa_init_si_ram(tsa); + + ret = tsa_of_parse_tdms(tsa, np); + if (ret) + return ret; + + /* Set SIMODE */ + val = 0; + if (tsa->tdm[0].is_enable) + val |= TSA_SIMODE_TDMA(tsa->tdm[0].simode_tdm); + if (tsa->tdm[1].is_enable) + val |= TSA_SIMODE_TDMB(tsa->tdm[1].simode_tdm); + + tsa_clrsetbits32(tsa->si_regs + TSA_SIMODE, + TSA_SIMODE_TDMA(TSA_SIMODE_TDM_MASK) | + TSA_SIMODE_TDMB(TSA_SIMODE_TDM_MASK), + val); + + /* Set SIGMR */ + val = (tsa->tdms == BIT(TSA_TDMA)) ? + TSA_SIGMR_RDM_STATIC_TDMA : TSA_SIGMR_RDM_STATIC_TDMAB; + if (tsa->tdms & BIT(TSA_TDMA)) + val |= TSA_SIGMR_ENA; + if (tsa->tdms & BIT(TSA_TDMB)) + val |= TSA_SIGMR_ENB; + tsa_write8(tsa->si_regs + TSA_SIGMR, val); + + platform_set_drvdata(pdev, tsa); + + return 0; +} + +static int tsa_remove(struct platform_device *pdev) +{ + struct tsa *tsa = platform_get_drvdata(pdev); + int i; + + for (i = 0; i < 2; i++) { + if (tsa->tdm[i].l1rsync_clk) { + clk_disable_unprepare(tsa->tdm[i].l1rsync_clk); + clk_put(tsa->tdm[i].l1rsync_clk); + } + if (tsa->tdm[i].l1rclk_clk) { + clk_disable_unprepare(tsa->tdm[i].l1rclk_clk); + clk_put(tsa->tdm[i].l1rclk_clk); + } + if (tsa->tdm[i].l1tsync_clk) { + clk_disable_unprepare(tsa->tdm[i].l1rsync_clk); + clk_put(tsa->tdm[i].l1rsync_clk); + } + if (tsa->tdm[i].l1tclk_clk) { + clk_disable_unprepare(tsa->tdm[i].l1rclk_clk); + clk_put(tsa->tdm[i].l1rclk_clk); + } + } + return 0; +} + +static const struct of_device_id tsa_id_table[] = { + { .compatible = "fsl,cpm1-tsa" }, + {} /* sentinel */ +}; +MODULE_DEVICE_TABLE(of, tsa_id_table); + +static struct platform_driver tsa_driver = { + .driver = { + .name = "fsl-tsa", + .of_match_table = of_match_ptr(tsa_id_table), + }, + .probe = tsa_probe, + .remove = tsa_remove, +}; +module_platform_driver(tsa_driver); + +struct tsa_serial *tsa_serial_get_byphandle(struct device_node *np, + const char *phandle_name) +{ + struct of_phandle_args out_args; + struct platform_device *pdev; + struct tsa_serial *tsa_serial; + struct tsa *tsa; + int ret; + + ret = of_parse_phandle_with_fixed_args(np, phandle_name, 1, 0, &out_args); + if (ret < 0) + return ERR_PTR(ret); + + if (!of_match_node(tsa_driver.driver.of_match_table, out_args.np)) { + of_node_put(out_args.np); + return ERR_PTR(-EINVAL); + } + + pdev = of_find_device_by_node(out_args.np); + of_node_put(out_args.np); + if (!pdev) + return ERR_PTR(-ENODEV); + + tsa = platform_get_drvdata(pdev); + if (!tsa) { + platform_device_put(pdev); + return ERR_PTR(-EPROBE_DEFER); + } + + if (out_args.args_count != 1) { + platform_device_put(pdev); + return ERR_PTR(-EINVAL); + } + + if (out_args.args[0] >= ARRAY_SIZE(tsa->serials)) { + platform_device_put(pdev); + return ERR_PTR(-EINVAL); + } + + tsa_serial = &tsa->serials[out_args.args[0]]; + + /* + * Be sure that the serial id matches the phandle arg. + * The tsa_serials table is indexed by serial ids. The serial id is set + * during the probe() call and needs to be coherent. + */ + if (WARN_ON(tsa_serial->id != out_args.args[0])) { + platform_device_put(pdev); + return ERR_PTR(-EINVAL); + } + + return tsa_serial; +} +EXPORT_SYMBOL(tsa_serial_get_byphandle); + +void tsa_serial_put(struct tsa_serial *tsa_serial) +{ + struct tsa *tsa = tsa_serial_get_tsa(tsa_serial); + + put_device(tsa->dev); +} +EXPORT_SYMBOL(tsa_serial_put); + +static void devm_tsa_serial_release(struct device *dev, void *res) +{ + struct tsa_serial **tsa_serial = res; + + tsa_serial_put(*tsa_serial); +} + +struct tsa_serial *devm_tsa_serial_get_byphandle(struct device *dev, + struct device_node *np, + const char *phandle_name) +{ + struct tsa_serial *tsa_serial; + struct tsa_serial **dr; + + dr = devres_alloc(devm_tsa_serial_release, sizeof(*dr), GFP_KERNEL); + if (!dr) + return ERR_PTR(-ENOMEM); + + tsa_serial = tsa_serial_get_byphandle(np, phandle_name); + if (!IS_ERR(tsa_serial)) { + *dr = tsa_serial; + devres_add(dev, dr); + } else { + devres_free(dr); + } + + return tsa_serial; +} +EXPORT_SYMBOL(devm_tsa_serial_get_byphandle); + +MODULE_AUTHOR("Herve Codina <herve.codina@bootlin.com>"); +MODULE_DESCRIPTION("CPM TSA driver"); +MODULE_LICENSE("GPL"); diff --git a/drivers/soc/fsl/qe/tsa.h b/drivers/soc/fsl/qe/tsa.h new file mode 100644 index 000000000000..d9df89b6da3e --- /dev/null +++ b/drivers/soc/fsl/qe/tsa.h @@ -0,0 +1,42 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * TSA management + * + * Copyright 2022 CS GROUP France + * + * Author: Herve Codina <herve.codina@bootlin.com> + */ +#ifndef __SOC_FSL_TSA_H__ +#define __SOC_FSL_TSA_H__ + +#include <linux/types.h> + +struct device_node; +struct device; +struct tsa_serial; + +struct tsa_serial *tsa_serial_get_byphandle(struct device_node *np, + const char *phandle_name); +void tsa_serial_put(struct tsa_serial *tsa_serial); +struct tsa_serial *devm_tsa_serial_get_byphandle(struct device *dev, + struct device_node *np, + const char *phandle_name); + +/* Connect and disconnect the TSA serial */ +int tsa_serial_connect(struct tsa_serial *tsa_serial); +int tsa_serial_disconnect(struct tsa_serial *tsa_serial); + +/* Cell information */ +struct tsa_serial_info { + unsigned long rx_fs_rate; + unsigned long rx_bit_rate; + u8 nb_rx_ts; + unsigned long tx_fs_rate; + unsigned long tx_bit_rate; + u8 nb_tx_ts; +}; + +/* Get information */ +int tsa_serial_get_info(struct tsa_serial *tsa_serial, struct tsa_serial_info *info); + +#endif /* __SOC_FSL_TSA_H__ */ |