2 * Freescale QorIQ AHCI SATA platform driver
4 * Copyright 2015 Freescale, Inc.
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2, or (at your option)
13 #include <linux/kernel.h>
14 #include <linux/module.h>
16 #include <linux/ahci_platform.h>
17 #include <linux/device.h>
18 #include <linux/of_address.h>
20 #include <linux/of_device.h>
21 #include <linux/platform_device.h>
22 #include <linux/libata.h>
25 #define DRV_NAME "ahci-qoriq"
27 /* port register definition */
28 #define PORT_PHY1 0xA8
29 #define PORT_PHY2 0xAC
30 #define PORT_PHY3 0xB0
31 #define PORT_PHY4 0xB4
32 #define PORT_PHY5 0xB8
33 #define PORT_AXICC 0xBC
34 #define PORT_TRANS 0xC8
36 /* port register default value */
37 #define AHCI_PORT_PHY_1_CFG 0xa003fffe
38 #define AHCI_PORT_PHY2_CFG 0x28184d1f
39 #define AHCI_PORT_PHY3_CFG 0x0e081509
40 #define AHCI_PORT_TRANS_CFG 0x08000029
41 #define AHCI_PORT_AXICC_CFG 0x3fffffff
44 #define LS1021A_PORT_PHY2 0x28183414
45 #define LS1021A_PORT_PHY3 0x0e080e06
46 #define LS1021A_PORT_PHY4 0x064a080b
47 #define LS1021A_PORT_PHY5 0x2aa86470
48 #define LS1021A_AXICC_ADDR 0xC0
50 #define SATA_ECC_DISABLE 0x00020000
51 #define ECC_DIS_ARMV8_CH2 0x80000000
52 #define ECC_DIS_LS1088A 0x40000000
54 enum ahci_qoriq_type {
63 struct ahci_qoriq_priv {
64 struct ccsr_ahci *reg_base;
65 enum ahci_qoriq_type type;
66 void __iomem *ecc_addr;
70 static const struct of_device_id ahci_qoriq_of_match[] = {
71 { .compatible = "fsl,ls1021a-ahci", .data = (void *)AHCI_LS1021A},
72 { .compatible = "fsl,ls1043a-ahci", .data = (void *)AHCI_LS1043A},
73 { .compatible = "fsl,ls2080a-ahci", .data = (void *)AHCI_LS2080A},
74 { .compatible = "fsl,ls1046a-ahci", .data = (void *)AHCI_LS1046A},
75 { .compatible = "fsl,ls1088a-ahci", .data = (void *)AHCI_LS1088A},
76 { .compatible = "fsl,ls2088a-ahci", .data = (void *)AHCI_LS2088A},
79 MODULE_DEVICE_TABLE(of, ahci_qoriq_of_match);
81 static int ahci_qoriq_hardreset(struct ata_link *link, unsigned int *class,
82 unsigned long deadline)
84 const unsigned long *timing = sata_ehc_deb_timing(&link->eh_context);
85 void __iomem *port_mmio = ahci_port_base(link->ap);
86 u32 px_cmd, px_is, px_val;
87 struct ata_port *ap = link->ap;
88 struct ahci_port_priv *pp = ap->private_data;
89 struct ahci_host_priv *hpriv = ap->host->private_data;
90 struct ahci_qoriq_priv *qoriq_priv = hpriv->plat_data;
91 u8 *d2h_fis = pp->rx_fis + RX_FIS_D2H_REG;
92 struct ata_taskfile tf;
95 bool ls1021a_workaround = (qoriq_priv->type == AHCI_LS1021A);
99 hpriv->stop_engine(ap);
102 * There is a errata on ls1021a Rev1.0 and Rev2.0 which is:
103 * A-009042: The device detection initialization sequence
104 * mistakenly resets some registers.
106 * Workaround for this is:
107 * The software should read and store PxCMD and PxIS values
108 * before issuing the device detection initialization sequence.
109 * After the sequence is complete, software should restore the
110 * PxCMD and PxIS with the stored values.
112 if (ls1021a_workaround) {
113 px_cmd = readl(port_mmio + PORT_CMD);
114 px_is = readl(port_mmio + PORT_IRQ_STAT);
117 /* clear D2H reception area to properly wait for D2H FIS */
118 ata_tf_init(link->device, &tf);
119 tf.command = ATA_BUSY;
120 ata_tf_to_fis(&tf, 0, 0, d2h_fis);
122 rc = sata_link_hardreset(link, timing, deadline, &online,
125 /* restore the PxCMD and PxIS on ls1021 */
126 if (ls1021a_workaround) {
127 px_val = readl(port_mmio + PORT_CMD);
128 if (px_val != px_cmd)
129 writel(px_cmd, port_mmio + PORT_CMD);
131 px_val = readl(port_mmio + PORT_IRQ_STAT);
133 writel(px_is, port_mmio + PORT_IRQ_STAT);
136 hpriv->start_engine(ap);
139 *class = ahci_dev_classify(ap);
141 DPRINTK("EXIT, rc=%d, class=%u\n", rc, *class);
145 static struct ata_port_operations ahci_qoriq_ops = {
146 .inherits = &ahci_ops,
147 .hardreset = ahci_qoriq_hardreset,
150 static const struct ata_port_info ahci_qoriq_port_info = {
151 .flags = AHCI_FLAG_COMMON | ATA_FLAG_NCQ,
152 .pio_mask = ATA_PIO4,
153 .udma_mask = ATA_UDMA6,
154 .port_ops = &ahci_qoriq_ops,
157 static struct scsi_host_template ahci_qoriq_sht = {
161 static int ahci_qoriq_phy_init(struct ahci_host_priv *hpriv)
163 struct ahci_qoriq_priv *qpriv = hpriv->plat_data;
164 void __iomem *reg_base = hpriv->mmio;
166 switch (qpriv->type) {
168 if (!qpriv->ecc_addr)
170 writel(SATA_ECC_DISABLE, qpriv->ecc_addr);
171 writel(AHCI_PORT_PHY_1_CFG, reg_base + PORT_PHY1);
172 writel(LS1021A_PORT_PHY2, reg_base + PORT_PHY2);
173 writel(LS1021A_PORT_PHY3, reg_base + PORT_PHY3);
174 writel(LS1021A_PORT_PHY4, reg_base + PORT_PHY4);
175 writel(LS1021A_PORT_PHY5, reg_base + PORT_PHY5);
176 writel(AHCI_PORT_TRANS_CFG, reg_base + PORT_TRANS);
177 if (qpriv->is_dmacoherent)
178 writel(AHCI_PORT_AXICC_CFG,
179 reg_base + LS1021A_AXICC_ADDR);
183 if (!qpriv->ecc_addr)
185 writel(readl(qpriv->ecc_addr) | ECC_DIS_ARMV8_CH2,
187 writel(AHCI_PORT_PHY_1_CFG, reg_base + PORT_PHY1);
188 writel(AHCI_PORT_PHY2_CFG, reg_base + PORT_PHY2);
189 writel(AHCI_PORT_PHY3_CFG, reg_base + PORT_PHY3);
190 writel(AHCI_PORT_TRANS_CFG, reg_base + PORT_TRANS);
191 if (qpriv->is_dmacoherent)
192 writel(AHCI_PORT_AXICC_CFG, reg_base + PORT_AXICC);
196 writel(AHCI_PORT_PHY_1_CFG, reg_base + PORT_PHY1);
197 writel(AHCI_PORT_PHY2_CFG, reg_base + PORT_PHY2);
198 writel(AHCI_PORT_PHY3_CFG, reg_base + PORT_PHY3);
199 writel(AHCI_PORT_TRANS_CFG, reg_base + PORT_TRANS);
200 if (qpriv->is_dmacoherent)
201 writel(AHCI_PORT_AXICC_CFG, reg_base + PORT_AXICC);
205 if (!qpriv->ecc_addr)
207 writel(readl(qpriv->ecc_addr) | ECC_DIS_ARMV8_CH2,
209 writel(AHCI_PORT_PHY_1_CFG, reg_base + PORT_PHY1);
210 writel(AHCI_PORT_PHY2_CFG, reg_base + PORT_PHY2);
211 writel(AHCI_PORT_PHY3_CFG, reg_base + PORT_PHY3);
212 writel(AHCI_PORT_TRANS_CFG, reg_base + PORT_TRANS);
213 if (qpriv->is_dmacoherent)
214 writel(AHCI_PORT_AXICC_CFG, reg_base + PORT_AXICC);
218 if (!qpriv->ecc_addr)
220 writel(readl(qpriv->ecc_addr) | ECC_DIS_LS1088A,
222 writel(AHCI_PORT_PHY_1_CFG, reg_base + PORT_PHY1);
223 writel(AHCI_PORT_PHY2_CFG, reg_base + PORT_PHY2);
224 writel(AHCI_PORT_PHY3_CFG, reg_base + PORT_PHY3);
225 writel(AHCI_PORT_TRANS_CFG, reg_base + PORT_TRANS);
226 if (qpriv->is_dmacoherent)
227 writel(AHCI_PORT_AXICC_CFG, reg_base + PORT_AXICC);
231 writel(AHCI_PORT_PHY_1_CFG, reg_base + PORT_PHY1);
232 writel(AHCI_PORT_PHY2_CFG, reg_base + PORT_PHY2);
233 writel(AHCI_PORT_PHY3_CFG, reg_base + PORT_PHY3);
234 writel(AHCI_PORT_TRANS_CFG, reg_base + PORT_TRANS);
235 if (qpriv->is_dmacoherent)
236 writel(AHCI_PORT_AXICC_CFG, reg_base + PORT_AXICC);
243 static int ahci_qoriq_probe(struct platform_device *pdev)
245 struct device_node *np = pdev->dev.of_node;
246 struct device *dev = &pdev->dev;
247 struct ahci_host_priv *hpriv;
248 struct ahci_qoriq_priv *qoriq_priv;
249 const struct of_device_id *of_id;
250 struct resource *res;
253 hpriv = ahci_platform_get_resources(pdev, 0);
255 return PTR_ERR(hpriv);
257 of_id = of_match_node(ahci_qoriq_of_match, np);
261 qoriq_priv = devm_kzalloc(dev, sizeof(*qoriq_priv), GFP_KERNEL);
265 qoriq_priv->type = (enum ahci_qoriq_type)of_id->data;
267 res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
270 qoriq_priv->ecc_addr = devm_ioremap_resource(dev, res);
271 if (IS_ERR(qoriq_priv->ecc_addr))
272 return PTR_ERR(qoriq_priv->ecc_addr);
274 qoriq_priv->is_dmacoherent = of_dma_is_coherent(np);
276 rc = ahci_platform_enable_resources(hpriv);
280 hpriv->plat_data = qoriq_priv;
281 rc = ahci_qoriq_phy_init(hpriv);
283 goto disable_resources;
285 rc = ahci_platform_init_host(pdev, hpriv, &ahci_qoriq_port_info,
288 goto disable_resources;
293 ahci_platform_disable_resources(hpriv);
298 #ifdef CONFIG_PM_SLEEP
299 static int ahci_qoriq_resume(struct device *dev)
301 struct ata_host *host = dev_get_drvdata(dev);
302 struct ahci_host_priv *hpriv = host->private_data;
305 rc = ahci_platform_enable_resources(hpriv);
309 rc = ahci_qoriq_phy_init(hpriv);
311 goto disable_resources;
313 rc = ahci_platform_resume_host(dev);
315 goto disable_resources;
317 /* We resumed so update PM runtime state */
318 pm_runtime_disable(dev);
319 pm_runtime_set_active(dev);
320 pm_runtime_enable(dev);
325 ahci_platform_disable_resources(hpriv);
331 static SIMPLE_DEV_PM_OPS(ahci_qoriq_pm_ops, ahci_platform_suspend,
334 static struct platform_driver ahci_qoriq_driver = {
335 .probe = ahci_qoriq_probe,
336 .remove = ata_platform_remove_one,
339 .of_match_table = ahci_qoriq_of_match,
340 .pm = &ahci_qoriq_pm_ops,
343 module_platform_driver(ahci_qoriq_driver);
345 MODULE_DESCRIPTION("Freescale QorIQ AHCI SATA platform driver");
347 MODULE_LICENSE("GPL");