| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| 942 | 97.82% | 1 | 12.50% | |
| 7 | 0.73% | 1 | 12.50% | |
| 5 | 0.52% | 1 | 12.50% | |
| 4 | 0.42% | 1 | 12.50% | |
| 2 | 0.21% | 1 | 12.50% | |
| 1 | 0.10% | 1 | 12.50% | |
| 1 | 0.10% | 1 | 12.50% | |
| 1 | 0.10% | 1 | 12.50% | |
| Total | 963 | 8 |
| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Daniel Hellstrom | 942 | 97.82% | 1 | 12.50% |
| Sachin Kamat | 7 | 0.73% | 1 | 12.50% |
| Rob Herring | 5 | 0.52% | 1 | 12.50% |
| ye xingchen | 4 | 0.42% | 1 | 12.50% |
| Thomas Gleixner | 2 | 0.21% | 1 | 12.50% |
| Ben Dooks | 1 | 0.10% | 1 | 12.50% |
| Jingoo Han | 1 | 0.10% | 1 | 12.50% |
| Wolfram Sang | 1 | 0.10% | 1 | 12.50% |
| Total | 963 | 8 |
// SPDX-License-Identifier: GPL-2.0-or-later /* * Copyright (C) 2013 Aeroflex Gaisler * * This driver supports the APBPS2 PS/2 core available in the GRLIB * VHDL IP core library. * * Full documentation of the APBPS2 core can be found here: * http://www.gaisler.com/products/grlib/grip.pdf * * See "Documentation/devicetree/bindings/input/ps2keyb-mouse-apbps2.txt" for * information on open firmware properties. * * Contributors: Daniel Hellstrom <daniel@gaisler.com> */ #include <linux/platform_device.h> #include <linux/module.h> #include <linux/serio.h> #include <linux/errno.h> #include <linux/interrupt.h> #include <linux/of.h> #include <linux/of_irq.h> #include <linux/device.h> #include <linux/delay.h> #include <linux/err.h> #include <linux/slab.h> #include <linux/string.h> #include <linux/kernel.h> #include <linux/io.h> struct apbps2_regs { u32 __iomem data; /* 0x00 */ u32 __iomem status; /* 0x04 */ u32 __iomem ctrl; /* 0x08 */ u32 __iomem reload; /* 0x0c */ }; #define APBPS2_STATUS_DR (1<<0) #define APBPS2_STATUS_PE (1<<1) #define APBPS2_STATUS_FE (1<<2) #define APBPS2_STATUS_KI (1<<3) #define APBPS2_STATUS_RF (1<<4) #define APBPS2_STATUS_TF (1<<5) #define APBPS2_STATUS_TCNT (0x1f<<22) #define APBPS2_STATUS_RCNT (0x1f<<27) #define APBPS2_CTRL_RE (1<<0) #define APBPS2_CTRL_TE (1<<1) #define APBPS2_CTRL_RI (1<<2) #define APBPS2_CTRL_TI (1<<3) struct apbps2_priv { struct serio *io; struct apbps2_regs __iomem *regs; }; static int apbps2_idx; static irqreturn_t apbps2_isr(int irq, void *dev_id) { struct apbps2_priv *priv = dev_id; unsigned long status, data, rxflags; irqreturn_t ret = IRQ_NONE; while ((status = ioread32be(&priv->regs->status)) & APBPS2_STATUS_DR) { data = ioread32be(&priv->regs->data); rxflags = (status & APBPS2_STATUS_PE) ? SERIO_PARITY : 0; rxflags |= (status & APBPS2_STATUS_FE) ? SERIO_FRAME : 0; /* clear error bits? */ if (rxflags) iowrite32be(0, &priv->regs->status); serio_interrupt(priv->io, data, rxflags); ret = IRQ_HANDLED; } return ret; } static int apbps2_write(struct serio *io, unsigned char val) { struct apbps2_priv *priv = io->port_data; unsigned int tleft = 10000; /* timeout in 100ms */ /* delay until PS/2 controller has room for more chars */ while ((ioread32be(&priv->regs->status) & APBPS2_STATUS_TF) && tleft--) udelay(10); if ((ioread32be(&priv->regs->status) & APBPS2_STATUS_TF) == 0) { iowrite32be(val, &priv->regs->data); iowrite32be(APBPS2_CTRL_RE | APBPS2_CTRL_RI | APBPS2_CTRL_TE, &priv->regs->ctrl); return 0; } return -ETIMEDOUT; } static int apbps2_open(struct serio *io) { struct apbps2_priv *priv = io->port_data; int limit; /* clear error flags */ iowrite32be(0, &priv->regs->status); /* Clear old data if available (unlikely) */ limit = 1024; while ((ioread32be(&priv->regs->status) & APBPS2_STATUS_DR) && --limit) ioread32be(&priv->regs->data); /* Enable reciever and it's interrupt */ iowrite32be(APBPS2_CTRL_RE | APBPS2_CTRL_RI, &priv->regs->ctrl); return 0; } static void apbps2_close(struct serio *io) { struct apbps2_priv *priv = io->port_data; /* stop interrupts at PS/2 HW level */ iowrite32be(0, &priv->regs->ctrl); } /* Initialize one APBPS2 PS/2 core */ static int apbps2_of_probe(struct platform_device *ofdev) { struct apbps2_priv *priv; int irq, err; u32 freq_hz; priv = devm_kzalloc(&ofdev->dev, sizeof(*priv), GFP_KERNEL); if (!priv) { dev_err(&ofdev->dev, "memory allocation failed\n"); return -ENOMEM; } /* Find Device Address */ priv->regs = devm_platform_get_and_ioremap_resource(ofdev, 0, NULL); if (IS_ERR(priv->regs)) return PTR_ERR(priv->regs); /* Reset hardware, disable interrupt */ iowrite32be(0, &priv->regs->ctrl); /* IRQ */ irq = irq_of_parse_and_map(ofdev->dev.of_node, 0); err = devm_request_irq(&ofdev->dev, irq, apbps2_isr, IRQF_SHARED, "apbps2", priv); if (err) { dev_err(&ofdev->dev, "request IRQ%d failed\n", irq); return err; } /* Get core frequency */ if (of_property_read_u32(ofdev->dev.of_node, "freq", &freq_hz)) { dev_err(&ofdev->dev, "unable to get core frequency\n"); return -EINVAL; } /* Set reload register to core freq in kHz/10 */ iowrite32be(freq_hz / 10000, &priv->regs->reload); priv->io = kzalloc(sizeof(struct serio), GFP_KERNEL); if (!priv->io) return -ENOMEM; priv->io->id.type = SERIO_8042; priv->io->open = apbps2_open; priv->io->close = apbps2_close; priv->io->write = apbps2_write; priv->io->port_data = priv; strscpy(priv->io->name, "APBPS2 PS/2", sizeof(priv->io->name)); snprintf(priv->io->phys, sizeof(priv->io->phys), "apbps2_%d", apbps2_idx++); dev_info(&ofdev->dev, "irq = %d, base = 0x%p\n", irq, priv->regs); serio_register_port(priv->io); platform_set_drvdata(ofdev, priv); return 0; } static int apbps2_of_remove(struct platform_device *of_dev) { struct apbps2_priv *priv = platform_get_drvdata(of_dev); serio_unregister_port(priv->io); return 0; } static const struct of_device_id apbps2_of_match[] = { { .name = "GAISLER_APBPS2", }, { .name = "01_060", }, {} }; MODULE_DEVICE_TABLE(of, apbps2_of_match); static struct platform_driver apbps2_of_driver = { .driver = { .name = "grlib-apbps2", .of_match_table = apbps2_of_match, }, .probe = apbps2_of_probe, .remove = apbps2_of_remove, }; module_platform_driver(apbps2_of_driver); MODULE_AUTHOR("Aeroflex Gaisler AB."); MODULE_DESCRIPTION("GRLIB APBPS2 PS/2 serial I/O"); MODULE_LICENSE("GPL");