[PATCH v5 02/10] soc: fsl: cpm1: Add support for TSA
Leo Li
leoyang.li at nxp.com
Fri Feb 17 09:11:35 AEDT 2023
> -----Original Message-----
> From: Herve Codina <herve.codina at bootlin.com>
> Sent: Thursday, February 16, 2023 7:42 AM
> To: Herve Codina <herve.codina at bootlin.com>; Leo Li
> <leoyang.li at nxp.com>; Rob Herring <robh+dt at kernel.org>; Krzysztof
> Kozlowski <krzysztof.kozlowski+dt at linaro.org>; Liam Girdwood
> <lgirdwood at gmail.com>; Mark Brown <broonie at kernel.org>; Christophe
> Leroy <christophe.leroy at csgroup.eu>; Michael Ellerman
> <mpe at ellerman.id.au>; Nicholas Piggin <npiggin at gmail.com>; Qiang Zhao
> <qiang.zhao at nxp.com>; Jaroslav Kysela <perex at perex.cz>; Takashi Iwai
> <tiwai at suse.com>; Shengjiu Wang <shengjiu.wang at gmail.com>; Xiubo Li
> <Xiubo.Lee at gmail.com>; Fabio Estevam <festevam at gmail.com>; Nicolin
> Chen <nicoleotsuka at gmail.com>
> Cc: linuxppc-dev at lists.ozlabs.org; linux-arm-kernel at lists.infradead.org;
> devicetree at vger.kernel.org; linux-kernel at vger.kernel.org; alsa-devel at alsa-
> project.org; Thomas Petazzoni <thomas.petazzoni at bootlin.com>
> Subject: [PATCH v5 02/10] soc: fsl: cpm1: Add support for TSA
>
> The TSA (Time Slot Assigner) purpose is to route some
> TDM time-slots to other internal serial controllers.
>
> It is available in some PowerQUICC SoC such as the
> MPC885 or MPC866.
>
> It is also available on some Quicc Engine SoCs.
> This current version support CPM1 SoCs only and some
> enhancement are needed to support Quicc Engine SoCs.
>
> Signed-off-by: Herve Codina <herve.codina at bootlin.com>
Looks good to me
Acked-by: Li Yang <leoyang.li at nxp.com>
> ---
> drivers/soc/fsl/qe/Kconfig | 11 +
> drivers/soc/fsl/qe/Makefile | 1 +
> drivers/soc/fsl/qe/tsa.c | 869
> ++++++++++++++++++++++++++++++++++++
> drivers/soc/fsl/qe/tsa.h | 42 ++
> 4 files changed, 923 insertions(+)
> create mode 100644 drivers/soc/fsl/qe/tsa.c
> create mode 100644 drivers/soc/fsl/qe/tsa.h
>
> diff --git a/drivers/soc/fsl/qe/Kconfig b/drivers/soc/fsl/qe/Kconfig
> index 357c5800b112..b0088495c323 100644
> --- a/drivers/soc/fsl/qe/Kconfig
> +++ b/drivers/soc/fsl/qe/Kconfig
> @@ -33,6 +33,17 @@ 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 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..45c961acc81b 100644
> --- a/drivers/soc/fsl/qe/Makefile
> +++ b/drivers/soc/fsl/qe/Makefile
> @@ -4,6 +4,7 @@
> #
> 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_UCC) += ucc.o
> obj-$(CONFIG_UCC_SLOW) += ucc_slow.o
> obj-$(CONFIG_UCC_FAST) += ucc_fast.o
> diff --git a/drivers/soc/fsl/qe/tsa.c b/drivers/soc/fsl/qe/tsa.c
> new file mode 100644
> index 000000000000..90d9a5254d9b
> --- /dev/null
> +++ b/drivers/soc/fsl/qe/tsa.c
> @@ -0,0 +1,869 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + * TSA driver
> + *
> + * Copyright 2022 CS GROUP France
> + *
> + * Author: Herve Codina <herve.codina at bootlin.com>
> + */
> +
> +#include "tsa.h"
> +#include <dt-bindings/soc/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;
> + const char *mode;
> + 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];
> +
> + mode = "disabled";
> + ret = of_property_read_string(tdm_np, "fsl,diagnostic-
> mode", &mode);
> + if (ret && ret != -EINVAL) {
> + dev_err(tsa->dev, "%pOF: failed to read
> fsl,diagnostic-mode\n",
> + tdm_np);
> + of_node_put(tdm_np);
> + return ret;
> + }
> + if (!strcmp(mode, "disabled")) {
> + tdm->simode_tdm |=
> TSA_SIMODE_TDM_SDM_NORM;
> + } else if (!strcmp(mode, "echo")) {
> + tdm->simode_tdm |=
> TSA_SIMODE_TDM_SDM_ECHO;
> + } else if (!strcmp(mode, "internal-loopback")) {
> + tdm->simode_tdm |=
> TSA_SIMODE_TDM_SDM_INTL_LOOP;
> + } else if (!strcmp(mode, "control-loopback")) {
> + tdm->simode_tdm |=
> TSA_SIMODE_TDM_SDM_LOOP_CTRL;
> + } else {
> + dev_err(tsa->dev, "%pOF: Invalid fsl,diagnostic-
> mode (%s)\n",
> + tdm_np, mode);
> + of_node_put(tdm_np);
> + return -EINVAL;
> + }
> +
> + 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 at 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 at 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__ */
> --
> 2.39.1
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