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/*
* Support for Gemini PATA
*
* Copyright (C) 2009 Janos Laube <janos.dev@gmail.com>
* Copyright (C) 2010 Frederic Pecourt <opengemini@free.fr>
* Copyright (C) 2011 Tobias Waldvogel <tobias.waldvogel@gmail.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
/* Values of IOMUX
* 26:24 bits is "IDE IO Select"
* 111:100 - Reserved
* 011 - ata0 <-> sata0, sata1; bring out ata1
* 010 - ata1 <-> sata1, sata0; bring out ata0
* 001 - ata0 <-> sata0, ata1 <-> sata1; bring out ata1
* 000 - ata0 <-> sata0, ata1 <-> sata1; bring out ata0
*
*/
#include <linux/platform_device.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/libata.h>
#include <linux/leds.h>
#include <mach/hardware.h>
#include <mach/global_reg.h>
#define DRV_NAME "pata-gemini"
#define PATA_GEMINI_PORTS 1
#define PIO_TIMING_REG 0x10
#define MDMA_TIMING_REG 0x11
#define UDMA_TIMING0_REG 0x12
#define UDMA_TIMING1_REG 0x13
#define CLK_MOD_REG 0x14
#define CLK_MOD_66M_DEV0_BIT 0
#define CLK_MOD_66M_DEV1_BIT 1
#define CLK_MOD_UDMA_DEV0_BIT 4
#define CLK_MOD_UDMA_DEV1_BIT 5
#define CLK_MOD_66M_DEV0 (1 << CLK_MOD_66M_DEV0_BIT)
#define CLK_MOD_66M_DEV1 (1 << CLK_MOD_66M_DEV1_BIT)
#define CLK_MOD_UDMA_DEV0 (1 << CLK_MOD_UDMA_DEV0_BIT)
#define CLK_MOD_UDMA_DEV1 (1 << CLK_MOD_UDMA_DEV1_BIT)
#define SATA_ENABLE_PDEV_MASK 0x01
#define SATA_ENABLE_PDEV_PM 0x02
#define SATA_ENABLE_PDEV_ADDED 0x04
#define SATA_ENABLE_PDEV_REMOVED 0x08
#define SATA_ENABLE_SDEV_MASK 0x10
#define SATA_ENABLE_SDEV_PM 0x20
#define SATA_ENABLE_SDEV_ADDED 0x40
#define SATA_ENABLE_SDEV_REMOVED 0x80
MODULE_AUTHOR("Janos Laube <janos.dev@gmail.com>");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:" DRV_NAME);
static unsigned char PIO_TIMING[5] = {
0xaa, 0xa3, 0xa1, 0x33, 0x31
};
static unsigned char TIMING_MW_DMA[4][2] = {
{ 0x44, 1 }, // 480 4.2
{ 0x42, 1 }, // 150 13.3
{ 0x31, 1 }, // 120 16.7
{ 0x21, 1 }, // 100 20
};
static unsigned char TIMING_UDMA[7][2] = {
{ 0x33, 0 }, //240 16.7
{ 0x31, 0 }, //160 25
{ 0x21, 0 }, //120 33.3
{ 0x21, 1 }, //90 44.4
{ 0x11, 1 }, //60 66.7
{ 0x11 | 0x80, 0 }, //40 100
{ 0x11 | 0x80, 1 }, //30 133
};
static struct scsi_host_template pata_gemini_sht = {
ATA_NCQ_SHT(DRV_NAME),
.can_queue = 1,
.sg_tablesize = 128,
.dma_boundary = 0xffffU,
};
static void gemini_set_dmamode(struct ata_port *ap, struct ata_device *adev)
{
void __iomem *clk_reg = ap->ioaddr.bmdma_addr + CLK_MOD_REG;
void __iomem *tim_reg = ap->ioaddr.bmdma_addr + UDMA_TIMING0_REG;
unsigned short udma = adev->dma_mode;
unsigned short speed = udma;
unsigned short devno = adev->devno & 1;
unsigned short i;
u8 mod_udma_mask = 1 << (CLK_MOD_UDMA_DEV0_BIT + devno);
u8 mod_66m_mask = 1 << (CLK_MOD_66M_DEV0_BIT + devno);
u8 clk_mod;
u8 timing;
clk_mod = ioread8(clk_reg);
clk_mod &= ~mod_udma_mask;
if (speed & XFER_UDMA_0) {
i = speed & ~XFER_UDMA_0;
timing = TIMING_UDMA[i][0];
clk_mod |= mod_udma_mask;
if (TIMING_UDMA[i][1])
clk_mod |= mod_66m_mask;
} else {
i = speed & ~XFER_MW_DMA_0;
timing = TIMING_MW_DMA[i][0];
clk_mod |= mod_udma_mask;
if (TIMING_MW_DMA[i][1])
clk_mod |= mod_66m_mask;
}
iowrite8(clk_mod, clk_reg);
iowrite8(timing, tim_reg + devno);
return;
}
static void gemini_set_piomode(struct ata_port *ap, struct ata_device *adev)
{
void __iomem *pio_reg = ap->ioaddr.bmdma_addr + PIO_TIMING_REG;
unsigned int pio = adev->pio_mode - XFER_PIO_0;
iowrite8(PIO_TIMING[pio], pio_reg);
}
unsigned int gemini_qc_issue(struct ata_queued_cmd *qc)
{
ledtrig_ide_activity();
return ata_bmdma_qc_issue(qc);
}
static struct ata_port_operations pata_gemini_port_ops = {
.inherits = &ata_bmdma_port_ops,
.set_dmamode = gemini_set_dmamode,
.set_piomode = gemini_set_piomode,
.qc_issue = gemini_qc_issue,
};
static struct ata_port_info pata_gemini_portinfo = {
.flags = 0,
.udma_mask = ATA_UDMA6,
.pio_mask = ATA_PIO4,
.port_ops = &pata_gemini_port_ops,
};
static const struct ata_port_info *pata_gemini_ports = &pata_gemini_portinfo;
static int pata_gemini_probe(struct platform_device *pdev)
{
struct ata_host *host;
struct resource *res;
unsigned int irq, i;
void __iomem *mmio_base;
/* standard bdma init */
irq = platform_get_irq(pdev, 0);
if (irq < 0)
return irq;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!res)
return -ENODEV;
pr_info(DRV_NAME ": irq %d, io base 0x%08x\n", irq, res->start);
mmio_base = devm_ioremap(&pdev->dev, res->start, resource_size(res));
host = ata_host_alloc_pinfo(&pdev->dev, &pata_gemini_ports, 1);
if (!host)
return -ENOMEM;
for (i = 0; i < host->n_ports; i++) {
struct ata_port *ap = host->ports[i];
struct ata_ioports *ioaddr = &ap->ioaddr;
ioaddr->bmdma_addr = mmio_base;
ioaddr->cmd_addr = mmio_base + 0x20;
ioaddr->ctl_addr = mmio_base + 0x36;
ioaddr->altstatus_addr = ioaddr->ctl_addr;
ata_sff_std_ports(ioaddr);
host->ports[i]->cbl = ATA_CBL_SATA;
}
return ata_host_activate(host, irq, ata_bmdma_interrupt,
IRQF_SHARED, &pata_gemini_sht);
}
static int pata_gemini_remove(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct ata_host *host = dev_get_drvdata(dev);
ata_host_detach(host);
return 0;
}
static struct platform_driver pata_gemini_driver = {
.probe = pata_gemini_probe,
.remove = pata_gemini_remove,
.driver.owner = THIS_MODULE,
.driver.name = DRV_NAME,
};
static int __init pata_gemini_module_init(void)
{
return platform_driver_probe(&pata_gemini_driver, pata_gemini_probe);
}
static void __exit pata_gemini_module_exit(void)
{
platform_driver_unregister(&pata_gemini_driver);
}
module_init(pata_gemini_module_init);
module_exit(pata_gemini_module_exit);
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