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-rw-r--r--drivers/ata/pata_ixp4xx_cf.c201
1 files changed, 154 insertions, 47 deletions
diff --git a/drivers/ata/pata_ixp4xx_cf.c b/drivers/ata/pata_ixp4xx_cf.c
index 72d6d6f2ef99..99c63087c8ae 100644
--- a/drivers/ata/pata_ixp4xx_cf.c
+++ b/drivers/ata/pata_ixp4xx_cf.c
@@ -13,45 +13,134 @@
*/
#include <linux/kernel.h>
+#include <linux/mfd/syscon.h>
#include <linux/module.h>
#include <linux/libata.h>
#include <linux/irq.h>
#include <linux/platform_device.h>
-#include <linux/platform_data/pata_ixp4xx_cf.h>
+#include <linux/regmap.h>
#include <scsi/scsi_host.h>
#define DRV_NAME "pata_ixp4xx_cf"
-#define DRV_VERSION "0.2"
+#define DRV_VERSION "1.0"
-static int ixp4xx_set_mode(struct ata_link *link, struct ata_device **error)
+struct ixp4xx_pata {
+ struct ata_host *host;
+ struct regmap *rmap;
+ u32 cmd_csreg;
+ void __iomem *cmd;
+ void __iomem *ctl;
+};
+
+#define IXP4XX_EXP_TIMING_STRIDE 0x04
+/* The timings for the chipselect is in bits 29..16 */
+#define IXP4XX_EXP_T1_T5_MASK GENMASK(29, 16)
+#define IXP4XX_EXP_PIO_0_8 0x0a470000
+#define IXP4XX_EXP_PIO_1_8 0x06430000
+#define IXP4XX_EXP_PIO_2_8 0x02410000
+#define IXP4XX_EXP_PIO_3_8 0x00820000
+#define IXP4XX_EXP_PIO_4_8 0x00400000
+#define IXP4XX_EXP_PIO_0_16 0x29640000
+#define IXP4XX_EXP_PIO_1_16 0x05030000
+#define IXP4XX_EXP_PIO_2_16 0x00b20000
+#define IXP4XX_EXP_PIO_3_16 0x00820000
+#define IXP4XX_EXP_PIO_4_16 0x00400000
+#define IXP4XX_EXP_BW_MASK (BIT(6)|BIT(0))
+#define IXP4XX_EXP_BYTE_RD16 BIT(6) /* Byte reads on half-word devices */
+#define IXP4XX_EXP_BYTE_EN BIT(0) /* Use 8bit data bus if set */
+
+static void ixp4xx_set_8bit_timing(struct ixp4xx_pata *ixpp, u8 pio_mode)
+{
+ switch (pio_mode) {
+ case XFER_PIO_0:
+ regmap_update_bits(ixpp->rmap, ixpp->cmd_csreg,
+ IXP4XX_EXP_T1_T5_MASK, IXP4XX_EXP_PIO_0_8);
+ break;
+ case XFER_PIO_1:
+ regmap_update_bits(ixpp->rmap, ixpp->cmd_csreg,
+ IXP4XX_EXP_T1_T5_MASK, IXP4XX_EXP_PIO_1_8);
+ break;
+ case XFER_PIO_2:
+ regmap_update_bits(ixpp->rmap, ixpp->cmd_csreg,
+ IXP4XX_EXP_T1_T5_MASK, IXP4XX_EXP_PIO_2_8);
+ break;
+ case XFER_PIO_3:
+ regmap_update_bits(ixpp->rmap, ixpp->cmd_csreg,
+ IXP4XX_EXP_T1_T5_MASK, IXP4XX_EXP_PIO_3_8);
+ break;
+ case XFER_PIO_4:
+ regmap_update_bits(ixpp->rmap, ixpp->cmd_csreg,
+ IXP4XX_EXP_T1_T5_MASK, IXP4XX_EXP_PIO_4_8);
+ break;
+ default:
+ break;
+ }
+ regmap_update_bits(ixpp->rmap, ixpp->cmd_csreg,
+ IXP4XX_EXP_BW_MASK, IXP4XX_EXP_BYTE_RD16|IXP4XX_EXP_BYTE_EN);
+}
+
+static void ixp4xx_set_16bit_timing(struct ixp4xx_pata *ixpp, u8 pio_mode)
{
- struct ata_device *dev;
-
- ata_for_each_dev(dev, link, ENABLED) {
- ata_dev_info(dev, "configured for PIO0\n");
- dev->pio_mode = XFER_PIO_0;
- dev->xfer_mode = XFER_PIO_0;
- dev->xfer_shift = ATA_SHIFT_PIO;
- dev->flags |= ATA_DFLAG_PIO;
+ switch (pio_mode){
+ case XFER_PIO_0:
+ regmap_update_bits(ixpp->rmap, ixpp->cmd_csreg,
+ IXP4XX_EXP_T1_T5_MASK, IXP4XX_EXP_PIO_0_16);
+ break;
+ case XFER_PIO_1:
+ regmap_update_bits(ixpp->rmap, ixpp->cmd_csreg,
+ IXP4XX_EXP_T1_T5_MASK, IXP4XX_EXP_PIO_1_16);
+ break;
+ case XFER_PIO_2:
+ regmap_update_bits(ixpp->rmap, ixpp->cmd_csreg,
+ IXP4XX_EXP_T1_T5_MASK, IXP4XX_EXP_PIO_2_16);
+ break;
+ case XFER_PIO_3:
+ regmap_update_bits(ixpp->rmap, ixpp->cmd_csreg,
+ IXP4XX_EXP_T1_T5_MASK, IXP4XX_EXP_PIO_3_16);
+ break;
+ case XFER_PIO_4:
+ regmap_update_bits(ixpp->rmap, ixpp->cmd_csreg,
+ IXP4XX_EXP_T1_T5_MASK, IXP4XX_EXP_PIO_4_16);
+ break;
+ default:
+ break;
}
- return 0;
+ regmap_update_bits(ixpp->rmap, ixpp->cmd_csreg,
+ IXP4XX_EXP_BW_MASK, IXP4XX_EXP_BYTE_RD16);
}
+/* This sets up the timing on the chipselect CMD accordingly */
+static void ixp4xx_set_piomode(struct ata_port *ap, struct ata_device *adev)
+{
+ struct ixp4xx_pata *ixpp = ap->host->private_data;
+
+ ata_dev_printk(adev, KERN_INFO, "configured for PIO%d 8bit\n",
+ adev->pio_mode - XFER_PIO_0);
+ ixp4xx_set_8bit_timing(ixpp, adev->pio_mode);
+}
+
+
static unsigned int ixp4xx_mmio_data_xfer(struct ata_queued_cmd *qc,
- unsigned char *buf, unsigned int buflen, int rw)
+ unsigned char *buf, unsigned int buflen, int rw)
{
unsigned int i;
unsigned int words = buflen >> 1;
u16 *buf16 = (u16 *) buf;
+ struct ata_device *adev = qc->dev;
struct ata_port *ap = qc->dev->link->ap;
void __iomem *mmio = ap->ioaddr.data_addr;
- struct ixp4xx_pata_data *data = dev_get_platdata(ap->host->dev);
+ struct ixp4xx_pata *ixpp = ap->host->private_data;
+ unsigned long flags;
+
+ ata_dev_printk(adev, KERN_DEBUG, "%s %d bytes\n", (rw == READ) ? "READ" : "WRITE",
+ buflen);
+ spin_lock_irqsave(ap->lock, flags);
/* set the expansion bus in 16bit mode and restore
* 8 bit mode after the transaction.
*/
- *data->cs0_cfg &= ~(0x01);
- udelay(100);
+ ixp4xx_set_16bit_timing(ixpp, adev->pio_mode);
+ udelay(5);
/* Transfer multiple of 2 bytes */
if (rw == READ)
@@ -76,8 +165,10 @@ static unsigned int ixp4xx_mmio_data_xfer(struct ata_queued_cmd *qc,
words++;
}
- udelay(100);
- *data->cs0_cfg |= 0x01;
+ ixp4xx_set_8bit_timing(ixpp, adev->pio_mode);
+ udelay(5);
+
+ spin_unlock_irqrestore(ap->lock, flags);
return words << 1;
}
@@ -90,19 +181,25 @@ static struct ata_port_operations ixp4xx_port_ops = {
.inherits = &ata_sff_port_ops,
.sff_data_xfer = ixp4xx_mmio_data_xfer,
.cable_detect = ata_cable_40wire,
- .set_mode = ixp4xx_set_mode,
+ .set_piomode = ixp4xx_set_piomode,
+};
+
+static struct ata_port_info ixp4xx_port_info = {
+ .flags = ATA_FLAG_NO_ATAPI,
+ .pio_mask = ATA_PIO4,
+ .port_ops = &ixp4xx_port_ops,
};
static void ixp4xx_setup_port(struct ata_port *ap,
- struct ixp4xx_pata_data *data,
+ struct ixp4xx_pata *ixpp,
unsigned long raw_cmd, unsigned long raw_ctl)
{
struct ata_ioports *ioaddr = &ap->ioaddr;
raw_ctl += 0x06;
- ioaddr->cmd_addr = data->cmd;
- ioaddr->altstatus_addr = data->ctl + 0x06;
- ioaddr->ctl_addr = data->ctl + 0x06;
+ ioaddr->cmd_addr = ixpp->cmd;
+ ioaddr->altstatus_addr = ixpp->ctl + 0x06;
+ ioaddr->ctl_addr = ixpp->ctl + 0x06;
ata_sff_std_ports(ioaddr);
@@ -135,10 +232,12 @@ static void ixp4xx_setup_port(struct ata_port *ap,
static int ixp4xx_pata_probe(struct platform_device *pdev)
{
struct resource *cmd, *ctl;
- struct ata_host *host;
- struct ata_port *ap;
+ struct ata_port_info pi = ixp4xx_port_info;
+ const struct ata_port_info *ppi[] = { &pi, NULL };
struct device *dev = &pdev->dev;
- struct ixp4xx_pata_data *data = dev_get_platdata(&pdev->dev);
+ struct device_node *np = dev->of_node;
+ struct ixp4xx_pata *ixpp;
+ u32 csindex;
int ret;
int irq;
@@ -148,20 +247,32 @@ static int ixp4xx_pata_probe(struct platform_device *pdev)
if (!cmd || !ctl)
return -EINVAL;
- /* allocate host */
- host = ata_host_alloc(dev, 1);
- if (!host)
+ ixpp = devm_kzalloc(dev, sizeof(*ixpp), GFP_KERNEL);
+ if (!ixpp)
+ return -ENOMEM;
+
+ ixpp->rmap = syscon_node_to_regmap(np->parent);
+ if (IS_ERR(ixpp->rmap))
+ return dev_err_probe(dev, PTR_ERR(ixpp->rmap), "no regmap\n");
+ /* Inspect our address to figure out what chipselect the CMD is on */
+ ret = of_property_read_u32_index(np, "reg", 0, &csindex);
+ if (ret)
+ return dev_err_probe(dev, ret, "can't inspect CMD address\n");
+ dev_info(dev, "using CS%d for PIO timing configuration\n", csindex);
+ ixpp->cmd_csreg = csindex * IXP4XX_EXP_TIMING_STRIDE;
+
+ ixpp->host = ata_host_alloc_pinfo(dev, ppi, 1);
+ if (!ixpp->host)
return -ENOMEM;
+ ixpp->host->private_data = ixpp;
- /* acquire resources and fill host */
ret = dma_set_coherent_mask(dev, DMA_BIT_MASK(32));
if (ret)
return ret;
- data->cmd = devm_ioremap(dev, cmd->start, 0x1000);
- data->ctl = devm_ioremap(dev, ctl->start, 0x1000);
-
- if (!data->cmd || !data->ctl)
+ ixpp->cmd = devm_ioremap_resource(dev, cmd);
+ ixpp->ctl = devm_ioremap_resource(dev, ctl);
+ if (IS_ERR(ixpp->cmd) || IS_ERR(ixpp->ctl))
return -ENOMEM;
irq = platform_get_irq(pdev, 0);
@@ -172,27 +283,23 @@ static int ixp4xx_pata_probe(struct platform_device *pdev)
else
return -EINVAL;
- /* Setup expansion bus chip selects */
- *data->cs0_cfg = data->cs0_bits;
- *data->cs1_cfg = data->cs1_bits;
-
- ap = host->ports[0];
-
- ap->ops = &ixp4xx_port_ops;
- ap->pio_mask = ATA_PIO4;
- ap->flags |= ATA_FLAG_NO_ATAPI;
-
- ixp4xx_setup_port(ap, data, cmd->start, ctl->start);
+ /* Just one port to set up */
+ ixp4xx_setup_port(ixpp->host->ports[0], ixpp, cmd->start, ctl->start);
ata_print_version_once(dev, DRV_VERSION);
- /* activate host */
- return ata_host_activate(host, irq, ata_sff_interrupt, 0, &ixp4xx_sht);
+ return ata_host_activate(ixpp->host, irq, ata_sff_interrupt, 0, &ixp4xx_sht);
}
+static const struct of_device_id ixp4xx_pata_of_match[] = {
+ { .compatible = "intel,ixp4xx-compact-flash", },
+ { },
+};
+
static struct platform_driver ixp4xx_pata_platform_driver = {
.driver = {
.name = DRV_NAME,
+ .of_match_table = ixp4xx_pata_of_match,
},
.probe = ixp4xx_pata_probe,
.remove = ata_platform_remove_one,
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-23 03:21:15 +0100