2  * Freescale iMX PATA driver
4  * Copyright (C) 2011 Arnaud Patard <arnaud.patard@rtp-net.org>
6  * Based on pata_platform - Copyright (C) 2006 - 2007  Paul Mundt
13  * - dmaengine support
62 	clkrate = clk_get_rate(priv->clk);  in pata_imx_set_timing()
64 	if (adev->pio_mode < XFER_PIO_0 || adev->pio_mode > XFER_PIO_4 ||  in pata_imx_set_timing()
69 	ata_timing_compute(adev, adev->pio_mode, &timing, T * 1000, 0);  in pata_imx_set_timing()
71 	mode = adev->pio_mode - XFER_PIO_0;  in pata_imx_set_timing()
73 	writeb(3, priv->host_regs + PATA_IMX_ATA_TIME_OFF);  in pata_imx_set_timing()
74 	writeb(3, priv->host_regs + PATA_IMX_ATA_TIME_ON);  in pata_imx_set_timing()
75 	writeb(timing.setup, priv->host_regs + PATA_IMX_ATA_TIME_1);  in pata_imx_set_timing()
76 	writeb(timing.act8b, priv->host_regs + PATA_IMX_ATA_TIME_2W);  in pata_imx_set_timing()
77 	writeb(timing.act8b, priv->host_regs + PATA_IMX_ATA_TIME_2R);  in pata_imx_set_timing()
78 	writeb(1, priv->host_regs + PATA_IMX_ATA_TIME_PIO_RDX);  in pata_imx_set_timing()
80 	writeb(pio_t4[mode] / T + 1, priv->host_regs + PATA_IMX_ATA_TIME_4);  in pata_imx_set_timing()
81 	writeb(pio_t9[mode] / T + 1, priv->host_regs + PATA_IMX_ATA_TIME_9);  in pata_imx_set_timing()
82 	writeb(pio_tA[mode] / T + 1, priv->host_regs + PATA_IMX_ATA_TIME_AX);  in pata_imx_set_timing()
87 	struct pata_imx_priv *priv = ap->host->private_data;  in pata_imx_set_piomode()
92 	val = __raw_readl(priv->host_regs + PATA_IMX_ATA_CONTROL);  in pata_imx_set_piomode()
97 	__raw_writel(val, priv->host_regs + PATA_IMX_ATA_CONTROL);  in pata_imx_set_piomode()
114 	ioaddr->data_addr	= ioaddr->cmd_addr + (ATA_REG_DATA    << 2);  in pata_imx_setup_port()
115 	ioaddr->error_addr	= ioaddr->cmd_addr + (ATA_REG_ERR     << 2);  in pata_imx_setup_port()
116 	ioaddr->feature_addr	= ioaddr->cmd_addr + (ATA_REG_FEATURE << 2);  in pata_imx_setup_port()
117 	ioaddr->nsect_addr	= ioaddr->cmd_addr + (ATA_REG_NSECT   << 2);  in pata_imx_setup_port()
118 	ioaddr->lbal_addr	= ioaddr->cmd_addr + (ATA_REG_LBAL    << 2);  in pata_imx_setup_port()
119 	ioaddr->lbam_addr	= ioaddr->cmd_addr + (ATA_REG_LBAM    << 2);  in pata_imx_setup_port()
120 	ioaddr->lbah_addr	= ioaddr->cmd_addr + (ATA_REG_LBAH    << 2);  in pata_imx_setup_port()
121 	ioaddr->device_addr	= ioaddr->cmd_addr + (ATA_REG_DEVICE  << 2);  in pata_imx_setup_port()
122 	ioaddr->status_addr	= ioaddr->cmd_addr + (ATA_REG_STATUS  << 2);  in pata_imx_setup_port()
123 	ioaddr->command_addr	= ioaddr->cmd_addr + (ATA_REG_CMD     << 2);  in pata_imx_setup_port()
139 	priv = devm_kzalloc(&pdev->dev,  in pata_imx_probe()
142 		return -ENOMEM;  in pata_imx_probe()
144 	priv->clk = devm_clk_get_enabled(&pdev->dev, NULL);  in pata_imx_probe()
145 	if (IS_ERR(priv->clk)) {  in pata_imx_probe()
146 		dev_err(&pdev->dev, "Failed to get and enable clock\n");  in pata_imx_probe()
147 		return PTR_ERR(priv->clk);  in pata_imx_probe()
150 	host = ata_host_alloc(&pdev->dev, 1);  in pata_imx_probe()
152 		return -ENOMEM;  in pata_imx_probe()
154 	host->private_data = priv;  in pata_imx_probe()
155 	ap = host->ports[0];  in pata_imx_probe()
157 	ap->ops = &pata_imx_port_ops;  in pata_imx_probe()
158 	ap->pio_mask = ATA_PIO4;  in pata_imx_probe()
159 	ap->flags |= ATA_FLAG_SLAVE_POSS;  in pata_imx_probe()
161 	priv->host_regs = devm_platform_get_and_ioremap_resource(pdev, 0, &io_res);  in pata_imx_probe()
162 	if (IS_ERR(priv->host_regs))  in pata_imx_probe()
163 		return PTR_ERR(priv->host_regs);  in pata_imx_probe()
165 	ap->ioaddr.cmd_addr = priv->host_regs + PATA_IMX_DRIVE_DATA;  in pata_imx_probe()
166 	ap->ioaddr.ctl_addr = priv->host_regs + PATA_IMX_DRIVE_CONTROL;  in pata_imx_probe()
168 	ap->ioaddr.altstatus_addr = ap->ioaddr.ctl_addr;  in pata_imx_probe()
170 	pata_imx_setup_port(&ap->ioaddr);  in pata_imx_probe()
173 		(unsigned long long)io_res->start + PATA_IMX_DRIVE_DATA,  in pata_imx_probe()
174 		(unsigned long long)io_res->start + PATA_IMX_DRIVE_CONTROL);  in pata_imx_probe()
179 			priv->host_regs + PATA_IMX_ATA_CONTROL);  in pata_imx_probe()
182 			priv->host_regs + PATA_IMX_ATA_INT_EN);  in pata_imx_probe()
197 	struct pata_imx_priv *priv = host->private_data;  in pata_imx_remove()
201 	__raw_writel(0, priv->host_regs + PATA_IMX_ATA_INT_EN);  in pata_imx_remove()
208 	struct pata_imx_priv *priv = host->private_data;  in pata_imx_suspend()
212 	__raw_writel(0, priv->host_regs + PATA_IMX_ATA_INT_EN);  in pata_imx_suspend()
213 	priv->ata_ctl = __raw_readl(priv->host_regs + PATA_IMX_ATA_CONTROL);  in pata_imx_suspend()
214 	clk_disable_unprepare(priv->clk);  in pata_imx_suspend()
222 	struct pata_imx_priv *priv = host->private_data;  in pata_imx_resume()
224 	int ret = clk_prepare_enable(priv->clk);  in pata_imx_resume()
228 	__raw_writel(priv->ata_ctl, priv->host_regs + PATA_IMX_ATA_CONTROL);  in pata_imx_resume()
231 			priv->host_regs + PATA_IMX_ATA_INT_EN);  in pata_imx_resume()
243 		.compatible = "fsl,imx27-pata",
262 MODULE_AUTHOR("Arnaud Patard <arnaud.patard@rtp-net.org>");
263 MODULE_DESCRIPTION("low-level driver for iMX PATA");