| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Arnaud Patard | 906 | 67.31% | 1 | 4.35% |
| Vladimir Zapolskiy | 322 | 23.92% | 4 | 17.39% |
| Sascha Hauer | 56 | 4.16% | 4 | 17.39% |
| Fabio Estevam | 39 | 2.90% | 5 | 21.74% |
| Niels de Vos | 7 | 0.52% | 1 | 4.35% |
| Bartlomiej Zolnierkiewicz | 7 | 0.52% | 2 | 8.70% |
| Eric Miao | 3 | 0.22% | 1 | 4.35% |
| Axel Lin | 2 | 0.15% | 1 | 4.35% |
| Jingoo Han | 1 | 0.07% | 1 | 4.35% |
| Sergey Shtylyov | 1 | 0.07% | 1 | 4.35% |
| Bart Van Assche | 1 | 0.07% | 1 | 4.35% |
| Sebastian Andrzej Siewior | 1 | 0.07% | 1 | 4.35% |
| Total | 1346 | 23 |
/* * Freescale iMX PATA driver * * Copyright (C) 2011 Arnaud Patard <arnaud.patard@rtp-net.org> * * Based on pata_platform - Copyright (C) 2006 - 2007 Paul Mundt * * This file is subject to the terms and conditions of the GNU General Public * License. See the file "COPYING" in the main directory of this archive * for more details. * * TODO: * - dmaengine support */ #include <linux/ata.h> #include <linux/clk.h> #include <linux/libata.h> #include <linux/module.h> #include <linux/mod_devicetable.h> #include <linux/platform_device.h> #define DRV_NAME "pata_imx" #define PATA_IMX_ATA_TIME_OFF 0x00 #define PATA_IMX_ATA_TIME_ON 0x01 #define PATA_IMX_ATA_TIME_1 0x02 #define PATA_IMX_ATA_TIME_2W 0x03 #define PATA_IMX_ATA_TIME_2R 0x04 #define PATA_IMX_ATA_TIME_AX 0x05 #define PATA_IMX_ATA_TIME_PIO_RDX 0x06 #define PATA_IMX_ATA_TIME_4 0x07 #define PATA_IMX_ATA_TIME_9 0x08 #define PATA_IMX_ATA_CONTROL 0x24 #define PATA_IMX_ATA_CTRL_FIFO_RST_B (1<<7) #define PATA_IMX_ATA_CTRL_ATA_RST_B (1<<6) #define PATA_IMX_ATA_CTRL_IORDY_EN (1<<0) #define PATA_IMX_ATA_INT_EN 0x2C #define PATA_IMX_ATA_INTR_ATA_INTRQ2 (1<<3) #define PATA_IMX_DRIVE_DATA 0xA0 #define PATA_IMX_DRIVE_CONTROL 0xD8 static u32 pio_t4[] = { 30, 20, 15, 10, 10 }; static u32 pio_t9[] = { 20, 15, 10, 10, 10 }; static u32 pio_tA[] = { 35, 35, 35, 35, 35 }; struct pata_imx_priv { struct clk *clk; /* timings/interrupt/control regs */ void __iomem *host_regs; u32 ata_ctl; }; static void pata_imx_set_timing(struct ata_device *adev, struct pata_imx_priv *priv) { struct ata_timing timing; unsigned long clkrate; u32 T, mode; clkrate = clk_get_rate(priv->clk); if (adev->pio_mode < XFER_PIO_0 || adev->pio_mode > XFER_PIO_4 || !clkrate) return; T = 1000000000 / clkrate; ata_timing_compute(adev, adev->pio_mode, &timing, T * 1000, 0); mode = adev->pio_mode - XFER_PIO_0; writeb(3, priv->host_regs + PATA_IMX_ATA_TIME_OFF); writeb(3, priv->host_regs + PATA_IMX_ATA_TIME_ON); writeb(timing.setup, priv->host_regs + PATA_IMX_ATA_TIME_1); writeb(timing.act8b, priv->host_regs + PATA_IMX_ATA_TIME_2W); writeb(timing.act8b, priv->host_regs + PATA_IMX_ATA_TIME_2R); writeb(1, priv->host_regs + PATA_IMX_ATA_TIME_PIO_RDX); writeb(pio_t4[mode] / T + 1, priv->host_regs + PATA_IMX_ATA_TIME_4); writeb(pio_t9[mode] / T + 1, priv->host_regs + PATA_IMX_ATA_TIME_9); writeb(pio_tA[mode] / T + 1, priv->host_regs + PATA_IMX_ATA_TIME_AX); } static void pata_imx_set_piomode(struct ata_port *ap, struct ata_device *adev) { struct pata_imx_priv *priv = ap->host->private_data; u32 val; pata_imx_set_timing(adev, priv); val = __raw_readl(priv->host_regs + PATA_IMX_ATA_CONTROL); if (ata_pio_need_iordy(adev)) val |= PATA_IMX_ATA_CTRL_IORDY_EN; else val &= ~PATA_IMX_ATA_CTRL_IORDY_EN; __raw_writel(val, priv->host_regs + PATA_IMX_ATA_CONTROL); } static const struct scsi_host_template pata_imx_sht = { ATA_PIO_SHT(DRV_NAME), }; static struct ata_port_operations pata_imx_port_ops = { .inherits = &ata_sff_port_ops, .sff_data_xfer = ata_sff_data_xfer32, .cable_detect = ata_cable_unknown, .set_piomode = pata_imx_set_piomode, }; static void pata_imx_setup_port(struct ata_ioports *ioaddr) { /* Fixup the port shift for platforms that need it */ ioaddr->data_addr = ioaddr->cmd_addr + (ATA_REG_DATA << 2); ioaddr->error_addr = ioaddr->cmd_addr + (ATA_REG_ERR << 2); ioaddr->feature_addr = ioaddr->cmd_addr + (ATA_REG_FEATURE << 2); ioaddr->nsect_addr = ioaddr->cmd_addr + (ATA_REG_NSECT << 2); ioaddr->lbal_addr = ioaddr->cmd_addr + (ATA_REG_LBAL << 2); ioaddr->lbam_addr = ioaddr->cmd_addr + (ATA_REG_LBAM << 2); ioaddr->lbah_addr = ioaddr->cmd_addr + (ATA_REG_LBAH << 2); ioaddr->device_addr = ioaddr->cmd_addr + (ATA_REG_DEVICE << 2); ioaddr->status_addr = ioaddr->cmd_addr + (ATA_REG_STATUS << 2); ioaddr->command_addr = ioaddr->cmd_addr + (ATA_REG_CMD << 2); } static int pata_imx_probe(struct platform_device *pdev) { struct ata_host *host; struct ata_port *ap; struct pata_imx_priv *priv; int irq = 0; struct resource *io_res; int ret; irq = platform_get_irq(pdev, 0); if (irq < 0) return irq; priv = devm_kzalloc(&pdev->dev, sizeof(struct pata_imx_priv), GFP_KERNEL); if (!priv) return -ENOMEM; priv->clk = devm_clk_get(&pdev->dev, NULL); if (IS_ERR(priv->clk)) { dev_err(&pdev->dev, "Failed to get clock\n"); return PTR_ERR(priv->clk); } ret = clk_prepare_enable(priv->clk); if (ret) return ret; host = ata_host_alloc(&pdev->dev, 1); if (!host) { ret = -ENOMEM; goto err; } host->private_data = priv; ap = host->ports[0]; ap->ops = &pata_imx_port_ops; ap->pio_mask = ATA_PIO4; ap->flags |= ATA_FLAG_SLAVE_POSS; io_res = platform_get_resource(pdev, IORESOURCE_MEM, 0); priv->host_regs = devm_ioremap_resource(&pdev->dev, io_res); if (IS_ERR(priv->host_regs)) { ret = PTR_ERR(priv->host_regs); goto err; } ap->ioaddr.cmd_addr = priv->host_regs + PATA_IMX_DRIVE_DATA; ap->ioaddr.ctl_addr = priv->host_regs + PATA_IMX_DRIVE_CONTROL; ap->ioaddr.altstatus_addr = ap->ioaddr.ctl_addr; pata_imx_setup_port(&ap->ioaddr); ata_port_desc(ap, "cmd 0x%llx ctl 0x%llx", (unsigned long long)io_res->start + PATA_IMX_DRIVE_DATA, (unsigned long long)io_res->start + PATA_IMX_DRIVE_CONTROL); /* deassert resets */ __raw_writel(PATA_IMX_ATA_CTRL_FIFO_RST_B | PATA_IMX_ATA_CTRL_ATA_RST_B, priv->host_regs + PATA_IMX_ATA_CONTROL); /* enable interrupts */ __raw_writel(PATA_IMX_ATA_INTR_ATA_INTRQ2, priv->host_regs + PATA_IMX_ATA_INT_EN); /* activate */ ret = ata_host_activate(host, irq, ata_sff_interrupt, 0, &pata_imx_sht); if (ret) goto err; return 0; err: clk_disable_unprepare(priv->clk); return ret; } static int pata_imx_remove(struct platform_device *pdev) { struct ata_host *host = platform_get_drvdata(pdev); struct pata_imx_priv *priv = host->private_data; ata_host_detach(host); __raw_writel(0, priv->host_regs + PATA_IMX_ATA_INT_EN); clk_disable_unprepare(priv->clk); return 0; } #ifdef CONFIG_PM_SLEEP static int pata_imx_suspend(struct device *dev) { struct ata_host *host = dev_get_drvdata(dev); struct pata_imx_priv *priv = host->private_data; ata_host_suspend(host, PMSG_SUSPEND); __raw_writel(0, priv->host_regs + PATA_IMX_ATA_INT_EN); priv->ata_ctl = __raw_readl(priv->host_regs + PATA_IMX_ATA_CONTROL); clk_disable_unprepare(priv->clk); return 0; } static int pata_imx_resume(struct device *dev) { struct ata_host *host = dev_get_drvdata(dev); struct pata_imx_priv *priv = host->private_data; int ret = clk_prepare_enable(priv->clk); if (ret) return ret; __raw_writel(priv->ata_ctl, priv->host_regs + PATA_IMX_ATA_CONTROL); __raw_writel(PATA_IMX_ATA_INTR_ATA_INTRQ2, priv->host_regs + PATA_IMX_ATA_INT_EN); ata_host_resume(host); return 0; } #endif static SIMPLE_DEV_PM_OPS(pata_imx_pm_ops, pata_imx_suspend, pata_imx_resume); static const struct of_device_id imx_pata_dt_ids[] = { { .compatible = "fsl,imx27-pata", }, { /* sentinel */ } }; MODULE_DEVICE_TABLE(of, imx_pata_dt_ids); static struct platform_driver pata_imx_driver = { .probe = pata_imx_probe, .remove = pata_imx_remove, .driver = { .name = DRV_NAME, .of_match_table = imx_pata_dt_ids, .pm = &pata_imx_pm_ops, }, }; module_platform_driver(pata_imx_driver); MODULE_AUTHOR("Arnaud Patard <arnaud.patard@rtp-net.org>"); MODULE_DESCRIPTION("low-level driver for iMX PATA"); MODULE_LICENSE("GPL"); MODULE_ALIAS("platform:" DRV_NAME);