diff options
Diffstat (limited to 'drivers/soc/fsl/qe/qmc.c')
| -rw-r--r-- | drivers/soc/fsl/qe/qmc.c | 209 |
1 files changed, 199 insertions, 10 deletions
diff --git a/drivers/soc/fsl/qe/qmc.c b/drivers/soc/fsl/qe/qmc.c index 8ff7eaaa4c50..b3a9534441ee 100644 --- a/drivers/soc/fsl/qe/qmc.c +++ b/drivers/soc/fsl/qe/qmc.c @@ -19,24 +19,29 @@ #include <linux/platform_device.h> #include <linux/slab.h> #include <soc/fsl/cpm.h> +#include <soc/fsl/qe/ucc_slow.h> +#include <soc/fsl/qe/qe.h> #include <sysdev/fsl_soc.h> #include "tsa.h" -/* SCC general mode register high (32 bits) */ +/* SCC general mode register low (32 bits) (GUMR_L in QE) */ #define SCC_GSMRL 0x00 #define SCC_GSMRL_ENR BIT(5) #define SCC_GSMRL_ENT BIT(4) #define SCC_GSMRL_MODE_MASK GENMASK(3, 0) #define SCC_CPM1_GSMRL_MODE_QMC FIELD_PREP_CONST(SCC_GSMRL_MODE_MASK, 0x0A) +#define SCC_QE_GSMRL_MODE_QMC FIELD_PREP_CONST(SCC_GSMRL_MODE_MASK, 0x02) -/* SCC general mode register low (32 bits) */ +/* SCC general mode register high (32 bits) (identical to GUMR_H in QE) */ #define SCC_GSMRH 0x04 #define SCC_GSMRH_CTSS BIT(7) #define SCC_GSMRH_CDS BIT(8) #define SCC_GSMRH_CTSP BIT(9) #define SCC_GSMRH_CDP BIT(10) +#define SCC_GSMRH_TTX BIT(11) +#define SCC_GSMRH_TRX BIT(12) -/* SCC event register (16 bits) */ +/* SCC event register (16 bits) (identical to UCCE in QE) */ #define SCC_SCCE 0x10 #define SCC_SCCE_IQOV BIT(3) #define SCC_SCCE_GINT BIT(2) @@ -45,6 +50,10 @@ /* SCC mask register (16 bits) */ #define SCC_SCCM 0x14 + +/* UCC Extended Mode Register (8 bits, QE only) */ +#define SCC_QE_UCC_GUEMR 0x90 + /* Multichannel base pointer (32 bits) */ #define QMC_GBL_MCBASE 0x00 /* Multichannel controller state (16 bits) */ @@ -75,6 +84,15 @@ #define QMC_GBL_TSATTX 0x60 /* CRC constant (16 bits) */ #define QMC_GBL_C_MASK16 0xA0 +/* Rx framer base pointer (16 bits, QE only) */ +#define QMC_QE_GBL_RX_FRM_BASE 0xAC +/* Tx framer base pointer (16 bits, QE only) */ +#define QMC_QE_GBL_TX_FRM_BASE 0xAE +/* A reserved area (0xB0 -> 0xC3) that must be initialized to 0 (QE only) */ +#define QMC_QE_GBL_RSV_B0_START 0xB0 +#define QMC_QE_GBL_RSV_B0_SIZE 0x14 +/* QMC Global Channel specific base (32 bits, QE only) */ +#define QMC_QE_GBL_GCSBASE 0xC4 /* TSA entry (16bit entry in TSATRX and TSATTX) */ #define QMC_TSA_VALID BIT(15) @@ -217,6 +235,7 @@ struct qmc_chan { enum qmc_version { QMC_CPM1, + QMC_QE, }; struct qmc_data { @@ -237,6 +256,8 @@ struct qmc { void __iomem *scc_pram; void __iomem *dpram; u16 scc_pram_offset; + u32 dpram_offset; + u32 qe_subblock; cbd_t __iomem *bd_table; dma_addr_t bd_dma_addr; size_t bd_size; @@ -249,6 +270,11 @@ struct qmc { struct qmc_chan *chans[64]; }; +static void qmc_write8(void __iomem *addr, u8 val) +{ + iowrite8(val, addr); +} + static void qmc_write16(void __iomem *addr, u16 val) { iowrite16be(val, addr); @@ -289,6 +315,14 @@ static void qmc_setbits32(void __iomem *addr, u32 set) qmc_write32(addr, qmc_read32(addr) | set); } +static bool qmc_is_qe(const struct qmc *qmc) +{ + if (IS_ENABLED(CONFIG_QUICC_ENGINE) && IS_ENABLED(CONFIG_CPM)) + return qmc->data->version == QMC_QE; + + return IS_ENABLED(CONFIG_QUICC_ENGINE); +} + int qmc_chan_get_info(struct qmc_chan *chan, struct qmc_chan_info *info) { struct tsa_serial_info tsa_info; @@ -806,6 +840,13 @@ static int qmc_chan_cpm1_command(struct qmc_chan *chan, u8 qmc_opcode) return cpm_command(chan->id << 2, (qmc_opcode << 4) | 0x0E); } +static int qmc_chan_qe_command(struct qmc_chan *chan, u32 cmd) +{ + if (!qe_issue_cmd(cmd, chan->qmc->qe_subblock, chan->id, 0)) + return -EIO; + return 0; +} + static int qmc_chan_stop_rx(struct qmc_chan *chan) { unsigned long flags; @@ -820,7 +861,9 @@ static int qmc_chan_stop_rx(struct qmc_chan *chan) } /* Send STOP RECEIVE command */ - ret = qmc_chan_cpm1_command(chan, 0x0); + ret = qmc_is_qe(chan->qmc) ? + qmc_chan_qe_command(chan, QE_QMC_STOP_RX) : + qmc_chan_cpm1_command(chan, 0x0); if (ret) { dev_err(chan->qmc->dev, "chan %u: Send STOP RECEIVE failed (%d)\n", chan->id, ret); @@ -857,7 +900,9 @@ static int qmc_chan_stop_tx(struct qmc_chan *chan) } /* Send STOP TRANSMIT command */ - ret = qmc_chan_cpm1_command(chan, 0x1); + ret = qmc_is_qe(chan->qmc) ? + qmc_chan_qe_command(chan, QE_QMC_STOP_TX) : + qmc_chan_cpm1_command(chan, 0x1); if (ret) { dev_err(chan->qmc->dev, "chan %u: Send STOP TRANSMIT failed (%d)\n", chan->id, ret); @@ -1627,9 +1672,62 @@ static int qmc_cpm1_init_resources(struct qmc *qmc, struct platform_device *pdev return 0; } +static int qmc_qe_init_resources(struct qmc *qmc, struct platform_device *pdev) +{ + struct resource *res; + int ucc_num; + s32 info; + + qmc->scc_regs = devm_platform_ioremap_resource_byname(pdev, "ucc_regs"); + if (IS_ERR(qmc->scc_regs)) + return PTR_ERR(qmc->scc_regs); + + ucc_num = tsa_serial_get_num(qmc->tsa_serial); + if (ucc_num < 0) + return dev_err_probe(qmc->dev, ucc_num, "Failed to get UCC num\n"); + + qmc->qe_subblock = ucc_slow_get_qe_cr_subblock(ucc_num); + if (qmc->qe_subblock == QE_CR_SUBBLOCK_INVALID) { + dev_err(qmc->dev, "Unsupported ucc num %u\n", ucc_num); + return -EINVAL; + } + /* Allocate the 'Global Multichannel Parameters' and the + * 'Framer parameters' areas. The 'Framer parameters' area + * is located right after the 'Global Multichannel Parameters'. + * The 'Framer parameters' need 1 byte per receive and transmit + * channel. The maximum number of receive or transmit channel + * is 64. So reserve 2 * 64 bytes for the 'Framer parameters'. + */ + info = devm_qe_muram_alloc(qmc->dev, UCC_SLOW_PRAM_SIZE + 2 * 64, + ALIGNMENT_OF_UCC_SLOW_PRAM); + if (IS_ERR_VALUE(info)) { + dev_err(qmc->dev, "cannot allocate MURAM for PRAM"); + return -ENOMEM; + } + if (!qe_issue_cmd(QE_ASSIGN_PAGE_TO_DEVICE, qmc->qe_subblock, + QE_CR_PROTOCOL_UNSPECIFIED, info)) { + dev_err(qmc->dev, "QE_ASSIGN_PAGE_TO_DEVICE cmd failed"); + return -EIO; + } + qmc->scc_pram = qe_muram_addr(info); + qmc->scc_pram_offset = info; + + res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "dpram"); + if (!res) + return -EINVAL; + qmc->dpram_offset = res->start - qe_muram_dma(qe_muram_addr(0)); + qmc->dpram = devm_ioremap_resource(qmc->dev, res); + if (IS_ERR(qmc->scc_pram)) + return PTR_ERR(qmc->scc_pram); + + return 0; +} + static int qmc_init_resources(struct qmc *qmc, struct platform_device *pdev) { - return qmc_cpm1_init_resources(qmc, pdev); + return qmc_is_qe(qmc) ? + qmc_qe_init_resources(qmc, pdev) : + qmc_cpm1_init_resources(qmc, pdev); } static int qmc_cpm1_init_scc(struct qmc *qmc) @@ -1656,9 +1754,69 @@ static int qmc_cpm1_init_scc(struct qmc *qmc) return 0; } +static int qmc_qe_init_ucc(struct qmc *qmc) +{ + u32 val; + int ret; + + /* Set the UCC in slow mode */ + qmc_write8(qmc->scc_regs + SCC_QE_UCC_GUEMR, + UCC_GUEMR_SET_RESERVED3 | UCC_GUEMR_MODE_SLOW_RX | UCC_GUEMR_MODE_SLOW_TX); + + /* Connect the serial (UCC) to TSA */ + ret = tsa_serial_connect(qmc->tsa_serial); + if (ret) + return dev_err_probe(qmc->dev, ret, "Failed to connect TSA serial\n"); + + /* Initialize the QMC tx startup addresses */ + if (!qe_issue_cmd(QE_PUSHSCHED, qmc->qe_subblock, + QE_CR_PROTOCOL_UNSPECIFIED, 0x80)) { + dev_err(qmc->dev, "QE_CMD_PUSH_SCHED tx cmd failed"); + ret = -EIO; + goto err_tsa_serial_disconnect; + } + + /* Initialize the QMC rx startup addresses */ + if (!qe_issue_cmd(QE_PUSHSCHED, qmc->qe_subblock | 0x00020000, + QE_CR_PROTOCOL_UNSPECIFIED, 0x82)) { + dev_err(qmc->dev, "QE_CMD_PUSH_SCHED rx cmd failed"); + ret = -EIO; + goto err_tsa_serial_disconnect; + } + + /* Re-init RXPTR and TXPTR with the content of RX_S_PTR and + * TX_S_PTR (RX_S_PTR and TX_S_PTR are initialized during + * qmc_setup_tsa() call + */ + val = qmc_read16(qmc->scc_pram + QMC_GBL_RX_S_PTR); + qmc_write16(qmc->scc_pram + QMC_GBL_RXPTR, val); + val = qmc_read16(qmc->scc_pram + QMC_GBL_TX_S_PTR); + qmc_write16(qmc->scc_pram + QMC_GBL_TXPTR, val); + + /* Init GUMR_H and GUMR_L registers (SCC GSMR_H and GSMR_L) */ + val = SCC_GSMRH_CDS | SCC_GSMRH_CTSS | SCC_GSMRH_CDP | SCC_GSMRH_CTSP | + SCC_GSMRH_TRX | SCC_GSMRH_TTX; + qmc_write32(qmc->scc_regs + SCC_GSMRH, val); + + /* enable QMC mode */ + qmc_write32(qmc->scc_regs + SCC_GSMRL, SCC_QE_GSMRL_MODE_QMC); + + /* Disable and clear interrupts */ + qmc_write16(qmc->scc_regs + SCC_SCCM, 0x0000); + qmc_write16(qmc->scc_regs + SCC_SCCE, 0x000F); + + return 0; + +err_tsa_serial_disconnect: + tsa_serial_disconnect(qmc->tsa_serial); + return ret; +} + static int qmc_init_xcc(struct qmc *qmc) { - return qmc_cpm1_init_scc(qmc); + return qmc_is_qe(qmc) ? + qmc_qe_init_ucc(qmc) : + qmc_cpm1_init_scc(qmc); } static void qmc_exit_xcc(struct qmc *qmc) @@ -1742,6 +1900,22 @@ static int qmc_probe(struct platform_device *pdev) qmc_write32(qmc->scc_pram + QMC_GBL_C_MASK32, 0xDEBB20E3); qmc_write16(qmc->scc_pram + QMC_GBL_C_MASK16, 0xF0B8); + if (qmc_is_qe(qmc)) { + /* Zeroed the reserved area */ + memset_io(qmc->scc_pram + QMC_QE_GBL_RSV_B0_START, 0, + QMC_QE_GBL_RSV_B0_SIZE); + + qmc_write32(qmc->scc_pram + QMC_QE_GBL_GCSBASE, qmc->dpram_offset); + + /* Init 'framer parameters' area and set the base addresses */ + memset_io(qmc->scc_pram + UCC_SLOW_PRAM_SIZE, 0x01, 64); + memset_io(qmc->scc_pram + UCC_SLOW_PRAM_SIZE + 64, 0x01, 64); + qmc_write16(qmc->scc_pram + QMC_QE_GBL_RX_FRM_BASE, + qmc->scc_pram_offset + UCC_SLOW_PRAM_SIZE); + qmc_write16(qmc->scc_pram + QMC_QE_GBL_TX_FRM_BASE, + qmc->scc_pram_offset + UCC_SLOW_PRAM_SIZE + 64); + } + ret = qmc_init_tsa(qmc); if (ret) return ret; @@ -1757,7 +1931,7 @@ static int qmc_probe(struct platform_device *pdev) if (ret) return ret; - /* Init SCC */ + /* Init SCC (CPM1) or UCC (QE) */ ret = qmc_init_xcc(qmc); if (ret) return ret; @@ -1811,7 +1985,7 @@ static void qmc_remove(struct platform_device *pdev) /* Disable interrupts */ qmc_write16(qmc->scc_regs + SCC_SCCM, 0); - /* Exit SCC */ + /* Exit SCC (CPM1) or UCC (QE) */ qmc_exit_xcc(qmc); } @@ -1825,8 +1999,23 @@ static const struct qmc_data qmc_data_cpm1 = { .rpack = 0x00000000, }; +static const struct qmc_data qmc_data_qe = { + .version = QMC_QE, + .tstate = 0x30000000, + .rstate = 0x30000000, + .zistate = 0x00000200, + .zdstate_hdlc = 0x80FFFFE0, + .zdstate_transp = 0x003FFFE2, + .rpack = 0x80000000, +}; + static const struct of_device_id qmc_id_table[] = { +#if IS_ENABLED(CONFIG_CPM1) { .compatible = "fsl,cpm1-scc-qmc", .data = &qmc_data_cpm1 }, +#endif +#if IS_ENABLED(CONFIG_QUICC_ENGINE) + { .compatible = "fsl,qe-ucc-qmc", .data = &qmc_data_qe }, +#endif {} /* sentinel */ }; MODULE_DEVICE_TABLE(of, qmc_id_table); @@ -1986,5 +2175,5 @@ struct qmc_chan *devm_qmc_chan_get_bychild(struct device *dev, EXPORT_SYMBOL(devm_qmc_chan_get_bychild); MODULE_AUTHOR("Herve Codina <herve.codina@bootlin.com>"); -MODULE_DESCRIPTION("CPM QMC driver"); +MODULE_DESCRIPTION("CPM/QE QMC driver"); MODULE_LICENSE("GPL"); |