Author | Tokens | Token Proportion | Commits | Commit Proportion |
---|---|---|---|---|
Jarod Wilson | 2641 | 93.75% | 2 | 10.53% |
Mauro Carvalho Chehab | 60 | 2.13% | 2 | 10.53% |
Luis Henriques | 47 | 1.67% | 1 | 5.26% |
Sean Young | 24 | 0.85% | 4 | 21.05% |
Matthijs Kooijman | 16 | 0.57% | 2 | 10.53% |
Joe Perches | 16 | 0.57% | 1 | 5.26% |
Andi Shyti | 3 | 0.11% | 1 | 5.26% |
Ben Hutchings | 2 | 0.07% | 1 | 5.26% |
David Härdeman | 2 | 0.07% | 1 | 5.26% |
Peter Hüwe | 2 | 0.07% | 1 | 5.26% |
Thomas Gleixner | 2 | 0.07% | 1 | 5.26% |
Dan Carpenter | 1 | 0.04% | 1 | 5.26% |
Masahiro Yamada | 1 | 0.04% | 1 | 5.26% |
Total | 2817 | 19 |
// SPDX-License-Identifier: GPL-2.0-or-later /* * Driver for Feature Integration Technology Inc. (aka Fintek) LPC CIR * * Copyright (C) 2011 Jarod Wilson <jarod@redhat.com> * * Special thanks to Fintek for providing hardware and spec sheets. * This driver is based upon the nuvoton, ite and ene drivers for * similar hardware. */ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt #include <linux/kernel.h> #include <linux/module.h> #include <linux/pnp.h> #include <linux/io.h> #include <linux/interrupt.h> #include <linux/sched.h> #include <linux/slab.h> #include <media/rc-core.h> #include "fintek-cir.h" /* write val to config reg */ static inline void fintek_cr_write(struct fintek_dev *fintek, u8 val, u8 reg) { fit_dbg("%s: reg 0x%02x, val 0x%02x (ip/dp: %02x/%02x)", __func__, reg, val, fintek->cr_ip, fintek->cr_dp); outb(reg, fintek->cr_ip); outb(val, fintek->cr_dp); } /* read val from config reg */ static inline u8 fintek_cr_read(struct fintek_dev *fintek, u8 reg) { u8 val; outb(reg, fintek->cr_ip); val = inb(fintek->cr_dp); fit_dbg("%s: reg 0x%02x, val 0x%02x (ip/dp: %02x/%02x)", __func__, reg, val, fintek->cr_ip, fintek->cr_dp); return val; } /* update config register bit without changing other bits */ static inline void fintek_set_reg_bit(struct fintek_dev *fintek, u8 val, u8 reg) { u8 tmp = fintek_cr_read(fintek, reg) | val; fintek_cr_write(fintek, tmp, reg); } /* clear config register bit without changing other bits */ static inline void fintek_clear_reg_bit(struct fintek_dev *fintek, u8 val, u8 reg) { u8 tmp = fintek_cr_read(fintek, reg) & ~val; fintek_cr_write(fintek, tmp, reg); } /* enter config mode */ static inline void fintek_config_mode_enable(struct fintek_dev *fintek) { /* Enabling Config Mode explicitly requires writing 2x */ outb(CONFIG_REG_ENABLE, fintek->cr_ip); outb(CONFIG_REG_ENABLE, fintek->cr_ip); } /* exit config mode */ static inline void fintek_config_mode_disable(struct fintek_dev *fintek) { outb(CONFIG_REG_DISABLE, fintek->cr_ip); } /* * When you want to address a specific logical device, write its logical * device number to GCR_LOGICAL_DEV_NO */ static inline void fintek_select_logical_dev(struct fintek_dev *fintek, u8 ldev) { fintek_cr_write(fintek, ldev, GCR_LOGICAL_DEV_NO); } /* write val to cir config register */ static inline void fintek_cir_reg_write(struct fintek_dev *fintek, u8 val, u8 offset) { outb(val, fintek->cir_addr + offset); } /* read val from cir config register */ static u8 fintek_cir_reg_read(struct fintek_dev *fintek, u8 offset) { return inb(fintek->cir_addr + offset); } /* dump current cir register contents */ static void cir_dump_regs(struct fintek_dev *fintek) { fintek_config_mode_enable(fintek); fintek_select_logical_dev(fintek, fintek->logical_dev_cir); pr_info("%s: Dump CIR logical device registers:\n", FINTEK_DRIVER_NAME); pr_info(" * CR CIR BASE ADDR: 0x%x\n", (fintek_cr_read(fintek, CIR_CR_BASE_ADDR_HI) << 8) | fintek_cr_read(fintek, CIR_CR_BASE_ADDR_LO)); pr_info(" * CR CIR IRQ NUM: 0x%x\n", fintek_cr_read(fintek, CIR_CR_IRQ_SEL)); fintek_config_mode_disable(fintek); pr_info("%s: Dump CIR registers:\n", FINTEK_DRIVER_NAME); pr_info(" * STATUS: 0x%x\n", fintek_cir_reg_read(fintek, CIR_STATUS)); pr_info(" * CONTROL: 0x%x\n", fintek_cir_reg_read(fintek, CIR_CONTROL)); pr_info(" * RX_DATA: 0x%x\n", fintek_cir_reg_read(fintek, CIR_RX_DATA)); pr_info(" * TX_CONTROL: 0x%x\n", fintek_cir_reg_read(fintek, CIR_TX_CONTROL)); pr_info(" * TX_DATA: 0x%x\n", fintek_cir_reg_read(fintek, CIR_TX_DATA)); } /* detect hardware features */ static int fintek_hw_detect(struct fintek_dev *fintek) { unsigned long flags; u8 chip_major, chip_minor; u8 vendor_major, vendor_minor; u8 portsel, ir_class; u16 vendor, chip; fintek_config_mode_enable(fintek); /* Check if we're using config port 0x4e or 0x2e */ portsel = fintek_cr_read(fintek, GCR_CONFIG_PORT_SEL); if (portsel == 0xff) { fit_pr(KERN_INFO, "first portsel read was bunk, trying alt"); fintek_config_mode_disable(fintek); fintek->cr_ip = CR_INDEX_PORT2; fintek->cr_dp = CR_DATA_PORT2; fintek_config_mode_enable(fintek); portsel = fintek_cr_read(fintek, GCR_CONFIG_PORT_SEL); } fit_dbg("portsel reg: 0x%02x", portsel); ir_class = fintek_cir_reg_read(fintek, CIR_CR_CLASS); fit_dbg("ir_class reg: 0x%02x", ir_class); switch (ir_class) { case CLASS_RX_2TX: case CLASS_RX_1TX: fintek->hw_tx_capable = true; break; case CLASS_RX_ONLY: default: fintek->hw_tx_capable = false; break; } chip_major = fintek_cr_read(fintek, GCR_CHIP_ID_HI); chip_minor = fintek_cr_read(fintek, GCR_CHIP_ID_LO); chip = chip_major << 8 | chip_minor; vendor_major = fintek_cr_read(fintek, GCR_VENDOR_ID_HI); vendor_minor = fintek_cr_read(fintek, GCR_VENDOR_ID_LO); vendor = vendor_major << 8 | vendor_minor; if (vendor != VENDOR_ID_FINTEK) fit_pr(KERN_WARNING, "Unknown vendor ID: 0x%04x", vendor); else fit_dbg("Read Fintek vendor ID from chip"); fintek_config_mode_disable(fintek); spin_lock_irqsave(&fintek->fintek_lock, flags); fintek->chip_major = chip_major; fintek->chip_minor = chip_minor; fintek->chip_vendor = vendor; /* * Newer reviews of this chipset uses port 8 instead of 5 */ if ((chip != 0x0408) && (chip != 0x0804)) fintek->logical_dev_cir = LOGICAL_DEV_CIR_REV2; else fintek->logical_dev_cir = LOGICAL_DEV_CIR_REV1; spin_unlock_irqrestore(&fintek->fintek_lock, flags); return 0; } static void fintek_cir_ldev_init(struct fintek_dev *fintek) { /* Select CIR logical device and enable */ fintek_select_logical_dev(fintek, fintek->logical_dev_cir); fintek_cr_write(fintek, LOGICAL_DEV_ENABLE, CIR_CR_DEV_EN); /* Write allocated CIR address and IRQ information to hardware */ fintek_cr_write(fintek, fintek->cir_addr >> 8, CIR_CR_BASE_ADDR_HI); fintek_cr_write(fintek, fintek->cir_addr & 0xff, CIR_CR_BASE_ADDR_LO); fintek_cr_write(fintek, fintek->cir_irq, CIR_CR_IRQ_SEL); fit_dbg("CIR initialized, base io address: 0x%lx, irq: %d (len: %d)", fintek->cir_addr, fintek->cir_irq, fintek->cir_port_len); } /* enable CIR interrupts */ static void fintek_enable_cir_irq(struct fintek_dev *fintek) { fintek_cir_reg_write(fintek, CIR_STATUS_IRQ_EN, CIR_STATUS); } static void fintek_cir_regs_init(struct fintek_dev *fintek) { /* clear any and all stray interrupts */ fintek_cir_reg_write(fintek, CIR_STATUS_IRQ_MASK, CIR_STATUS); /* and finally, enable interrupts */ fintek_enable_cir_irq(fintek); } static void fintek_enable_wake(struct fintek_dev *fintek) { fintek_config_mode_enable(fintek); fintek_select_logical_dev(fintek, LOGICAL_DEV_ACPI); /* Allow CIR PME's to wake system */ fintek_set_reg_bit(fintek, ACPI_WAKE_EN_CIR_BIT, LDEV_ACPI_WAKE_EN_REG); /* Enable CIR PME's */ fintek_set_reg_bit(fintek, ACPI_PME_CIR_BIT, LDEV_ACPI_PME_EN_REG); /* Clear CIR PME status register */ fintek_set_reg_bit(fintek, ACPI_PME_CIR_BIT, LDEV_ACPI_PME_CLR_REG); /* Save state */ fintek_set_reg_bit(fintek, ACPI_STATE_CIR_BIT, LDEV_ACPI_STATE_REG); fintek_config_mode_disable(fintek); } static int fintek_cmdsize(u8 cmd, u8 subcmd) { int datasize = 0; switch (cmd) { case BUF_COMMAND_NULL: if (subcmd == BUF_HW_CMD_HEADER) datasize = 1; break; case BUF_HW_CMD_HEADER: if (subcmd == BUF_CMD_G_REVISION) datasize = 2; break; case BUF_COMMAND_HEADER: switch (subcmd) { case BUF_CMD_S_CARRIER: case BUF_CMD_S_TIMEOUT: case BUF_RSP_PULSE_COUNT: datasize = 2; break; case BUF_CMD_SIG_END: case BUF_CMD_S_TXMASK: case BUF_CMD_S_RXSENSOR: datasize = 1; break; } } return datasize; } /* process ir data stored in driver buffer */ static void fintek_process_rx_ir_data(struct fintek_dev *fintek) { struct ir_raw_event rawir = {}; u8 sample; bool event = false; int i; for (i = 0; i < fintek->pkts; i++) { sample = fintek->buf[i]; switch (fintek->parser_state) { case CMD_HEADER: fintek->cmd = sample; if ((fintek->cmd == BUF_COMMAND_HEADER) || ((fintek->cmd & BUF_COMMAND_MASK) != BUF_PULSE_BIT)) { fintek->parser_state = SUBCMD; continue; } fintek->rem = (fintek->cmd & BUF_LEN_MASK); fit_dbg("%s: rem: 0x%02x", __func__, fintek->rem); if (fintek->rem) fintek->parser_state = PARSE_IRDATA; else ir_raw_event_reset(fintek->rdev); break; case SUBCMD: fintek->rem = fintek_cmdsize(fintek->cmd, sample); fintek->parser_state = CMD_DATA; break; case CMD_DATA: fintek->rem--; break; case PARSE_IRDATA: fintek->rem--; rawir.pulse = ((sample & BUF_PULSE_BIT) != 0); rawir.duration = US_TO_NS((sample & BUF_SAMPLE_MASK) * CIR_SAMPLE_PERIOD); fit_dbg("Storing %s with duration %d", rawir.pulse ? "pulse" : "space", rawir.duration); if (ir_raw_event_store_with_filter(fintek->rdev, &rawir)) event = true; break; } if ((fintek->parser_state != CMD_HEADER) && !fintek->rem) fintek->parser_state = CMD_HEADER; } fintek->pkts = 0; if (event) { fit_dbg("Calling ir_raw_event_handle"); ir_raw_event_handle(fintek->rdev); } } /* copy data from hardware rx register into driver buffer */ static void fintek_get_rx_ir_data(struct fintek_dev *fintek, u8 rx_irqs) { unsigned long flags; u8 sample, status; spin_lock_irqsave(&fintek->fintek_lock, flags); /* * We must read data from CIR_RX_DATA until the hardware IR buffer * is empty and clears the RX_TIMEOUT and/or RX_RECEIVE flags in * the CIR_STATUS register */ do { sample = fintek_cir_reg_read(fintek, CIR_RX_DATA); fit_dbg("%s: sample: 0x%02x", __func__, sample); fintek->buf[fintek->pkts] = sample; fintek->pkts++; status = fintek_cir_reg_read(fintek, CIR_STATUS); if (!(status & CIR_STATUS_IRQ_EN)) break; } while (status & rx_irqs); fintek_process_rx_ir_data(fintek); spin_unlock_irqrestore(&fintek->fintek_lock, flags); } static void fintek_cir_log_irqs(u8 status) { fit_pr(KERN_INFO, "IRQ 0x%02x:%s%s%s%s%s", status, status & CIR_STATUS_IRQ_EN ? " IRQEN" : "", status & CIR_STATUS_TX_FINISH ? " TXF" : "", status & CIR_STATUS_TX_UNDERRUN ? " TXU" : "", status & CIR_STATUS_RX_TIMEOUT ? " RXTO" : "", status & CIR_STATUS_RX_RECEIVE ? " RXOK" : ""); } /* interrupt service routine for incoming and outgoing CIR data */ static irqreturn_t fintek_cir_isr(int irq, void *data) { struct fintek_dev *fintek = data; u8 status, rx_irqs; fit_dbg_verbose("%s firing", __func__); fintek_config_mode_enable(fintek); fintek_select_logical_dev(fintek, fintek->logical_dev_cir); fintek_config_mode_disable(fintek); /* * Get IR Status register contents. Write 1 to ack/clear * * bit: reg name - description * 3: TX_FINISH - TX is finished * 2: TX_UNDERRUN - TX underrun * 1: RX_TIMEOUT - RX data timeout * 0: RX_RECEIVE - RX data received */ status = fintek_cir_reg_read(fintek, CIR_STATUS); if (!(status & CIR_STATUS_IRQ_MASK) || status == 0xff) { fit_dbg_verbose("%s exiting, IRSTS 0x%02x", __func__, status); fintek_cir_reg_write(fintek, CIR_STATUS_IRQ_MASK, CIR_STATUS); return IRQ_RETVAL(IRQ_NONE); } if (debug) fintek_cir_log_irqs(status); rx_irqs = status & (CIR_STATUS_RX_RECEIVE | CIR_STATUS_RX_TIMEOUT); if (rx_irqs) fintek_get_rx_ir_data(fintek, rx_irqs); /* ack/clear all irq flags we've got */ fintek_cir_reg_write(fintek, status, CIR_STATUS); fit_dbg_verbose("%s done", __func__); return IRQ_RETVAL(IRQ_HANDLED); } static void fintek_enable_cir(struct fintek_dev *fintek) { /* set IRQ enabled */ fintek_cir_reg_write(fintek, CIR_STATUS_IRQ_EN, CIR_STATUS); fintek_config_mode_enable(fintek); /* enable the CIR logical device */ fintek_select_logical_dev(fintek, fintek->logical_dev_cir); fintek_cr_write(fintek, LOGICAL_DEV_ENABLE, CIR_CR_DEV_EN); fintek_config_mode_disable(fintek); /* clear all pending interrupts */ fintek_cir_reg_write(fintek, CIR_STATUS_IRQ_MASK, CIR_STATUS); /* enable interrupts */ fintek_enable_cir_irq(fintek); } static void fintek_disable_cir(struct fintek_dev *fintek) { fintek_config_mode_enable(fintek); /* disable the CIR logical device */ fintek_select_logical_dev(fintek, fintek->logical_dev_cir); fintek_cr_write(fintek, LOGICAL_DEV_DISABLE, CIR_CR_DEV_EN); fintek_config_mode_disable(fintek); } static int fintek_open(struct rc_dev *dev) { struct fintek_dev *fintek = dev->priv; unsigned long flags; spin_lock_irqsave(&fintek->fintek_lock, flags); fintek_enable_cir(fintek); spin_unlock_irqrestore(&fintek->fintek_lock, flags); return 0; } static void fintek_close(struct rc_dev *dev) { struct fintek_dev *fintek = dev->priv; unsigned long flags; spin_lock_irqsave(&fintek->fintek_lock, flags); fintek_disable_cir(fintek); spin_unlock_irqrestore(&fintek->fintek_lock, flags); } /* Allocate memory, probe hardware, and initialize everything */ static int fintek_probe(struct pnp_dev *pdev, const struct pnp_device_id *dev_id) { struct fintek_dev *fintek; struct rc_dev *rdev; int ret = -ENOMEM; fintek = kzalloc(sizeof(struct fintek_dev), GFP_KERNEL); if (!fintek) return ret; /* input device for IR remote (and tx) */ rdev = rc_allocate_device(RC_DRIVER_IR_RAW); if (!rdev) goto exit_free_dev_rdev; ret = -ENODEV; /* validate pnp resources */ if (!pnp_port_valid(pdev, 0)) { dev_err(&pdev->dev, "IR PNP Port not valid!\n"); goto exit_free_dev_rdev; } if (!pnp_irq_valid(pdev, 0)) { dev_err(&pdev->dev, "IR PNP IRQ not valid!\n"); goto exit_free_dev_rdev; } fintek->cir_addr = pnp_port_start(pdev, 0); fintek->cir_irq = pnp_irq(pdev, 0); fintek->cir_port_len = pnp_port_len(pdev, 0); fintek->cr_ip = CR_INDEX_PORT; fintek->cr_dp = CR_DATA_PORT; spin_lock_init(&fintek->fintek_lock); pnp_set_drvdata(pdev, fintek); fintek->pdev = pdev; ret = fintek_hw_detect(fintek); if (ret) goto exit_free_dev_rdev; /* Initialize CIR & CIR Wake Logical Devices */ fintek_config_mode_enable(fintek); fintek_cir_ldev_init(fintek); fintek_config_mode_disable(fintek); /* Initialize CIR & CIR Wake Config Registers */ fintek_cir_regs_init(fintek); /* Set up the rc device */ rdev->priv = fintek; rdev->allowed_protocols = RC_PROTO_BIT_ALL_IR_DECODER; rdev->open = fintek_open; rdev->close = fintek_close; rdev->device_name = FINTEK_DESCRIPTION; rdev->input_phys = "fintek/cir0"; rdev->input_id.bustype = BUS_HOST; rdev->input_id.vendor = VENDOR_ID_FINTEK; rdev->input_id.product = fintek->chip_major; rdev->input_id.version = fintek->chip_minor; rdev->dev.parent = &pdev->dev; rdev->driver_name = FINTEK_DRIVER_NAME; rdev->map_name = RC_MAP_RC6_MCE; rdev->timeout = US_TO_NS(1000); /* rx resolution is hardwired to 50us atm, 1, 25, 100 also possible */ rdev->rx_resolution = US_TO_NS(CIR_SAMPLE_PERIOD); fintek->rdev = rdev; ret = -EBUSY; /* now claim resources */ if (!request_region(fintek->cir_addr, fintek->cir_port_len, FINTEK_DRIVER_NAME)) goto exit_free_dev_rdev; if (request_irq(fintek->cir_irq, fintek_cir_isr, IRQF_SHARED, FINTEK_DRIVER_NAME, (void *)fintek)) goto exit_free_cir_addr; ret = rc_register_device(rdev); if (ret) goto exit_free_irq; device_init_wakeup(&pdev->dev, true); fit_pr(KERN_NOTICE, "driver has been successfully loaded\n"); if (debug) cir_dump_regs(fintek); return 0; exit_free_irq: free_irq(fintek->cir_irq, fintek); exit_free_cir_addr: release_region(fintek->cir_addr, fintek->cir_port_len); exit_free_dev_rdev: rc_free_device(rdev); kfree(fintek); return ret; } static void fintek_remove(struct pnp_dev *pdev) { struct fintek_dev *fintek = pnp_get_drvdata(pdev); unsigned long flags; spin_lock_irqsave(&fintek->fintek_lock, flags); /* disable CIR */ fintek_disable_cir(fintek); fintek_cir_reg_write(fintek, CIR_STATUS_IRQ_MASK, CIR_STATUS); /* enable CIR Wake (for IR power-on) */ fintek_enable_wake(fintek); spin_unlock_irqrestore(&fintek->fintek_lock, flags); /* free resources */ free_irq(fintek->cir_irq, fintek); release_region(fintek->cir_addr, fintek->cir_port_len); rc_unregister_device(fintek->rdev); kfree(fintek); } static int fintek_suspend(struct pnp_dev *pdev, pm_message_t state) { struct fintek_dev *fintek = pnp_get_drvdata(pdev); unsigned long flags; fit_dbg("%s called", __func__); spin_lock_irqsave(&fintek->fintek_lock, flags); /* disable all CIR interrupts */ fintek_cir_reg_write(fintek, CIR_STATUS_IRQ_MASK, CIR_STATUS); spin_unlock_irqrestore(&fintek->fintek_lock, flags); fintek_config_mode_enable(fintek); /* disable cir logical dev */ fintek_select_logical_dev(fintek, fintek->logical_dev_cir); fintek_cr_write(fintek, LOGICAL_DEV_DISABLE, CIR_CR_DEV_EN); fintek_config_mode_disable(fintek); /* make sure wake is enabled */ fintek_enable_wake(fintek); return 0; } static int fintek_resume(struct pnp_dev *pdev) { struct fintek_dev *fintek = pnp_get_drvdata(pdev); fit_dbg("%s called", __func__); /* open interrupt */ fintek_enable_cir_irq(fintek); /* Enable CIR logical device */ fintek_config_mode_enable(fintek); fintek_select_logical_dev(fintek, fintek->logical_dev_cir); fintek_cr_write(fintek, LOGICAL_DEV_ENABLE, CIR_CR_DEV_EN); fintek_config_mode_disable(fintek); fintek_cir_regs_init(fintek); return 0; } static void fintek_shutdown(struct pnp_dev *pdev) { struct fintek_dev *fintek = pnp_get_drvdata(pdev); fintek_enable_wake(fintek); } static const struct pnp_device_id fintek_ids[] = { { "FIT0002", 0 }, /* CIR */ { "", 0 }, }; static struct pnp_driver fintek_driver = { .name = FINTEK_DRIVER_NAME, .id_table = fintek_ids, .flags = PNP_DRIVER_RES_DO_NOT_CHANGE, .probe = fintek_probe, .remove = fintek_remove, .suspend = fintek_suspend, .resume = fintek_resume, .shutdown = fintek_shutdown, }; module_param(debug, int, S_IRUGO | S_IWUSR); MODULE_PARM_DESC(debug, "Enable debugging output"); MODULE_DEVICE_TABLE(pnp, fintek_ids); MODULE_DESCRIPTION(FINTEK_DESCRIPTION " driver"); MODULE_AUTHOR("Jarod Wilson <jarod@redhat.com>"); MODULE_LICENSE("GPL"); module_pnp_driver(fintek_driver);
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