diff options
Diffstat (limited to 'target/linux/gemini/files/drivers/ata')
| -rw-r--r-- | target/linux/gemini/files/drivers/ata/pata_gemini.c | 234 |
1 files changed, 234 insertions, 0 deletions
diff --git a/target/linux/gemini/files/drivers/ata/pata_gemini.c b/target/linux/gemini/files/drivers/ata/pata_gemini.c new file mode 100644 index 0000000..707e870 --- /dev/null +++ b/target/linux/gemini/files/drivers/ata/pata_gemini.c @@ -0,0 +1,234 @@ +/* + * 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); |