diff options
Diffstat (limited to 'drivers/ide/tx4938ide.c')
| -rw-r--r-- | drivers/ide/tx4938ide.c | 209 |
1 files changed, 0 insertions, 209 deletions
diff --git a/drivers/ide/tx4938ide.c b/drivers/ide/tx4938ide.c deleted file mode 100644 index 962eb92501b5..000000000000 --- a/drivers/ide/tx4938ide.c +++ /dev/null @@ -1,209 +0,0 @@ -/* - * TX4938 internal IDE driver - * Based on tx4939ide.c. - * - * This file is subject to the terms and conditions of the GNU General Public - * License. See the file "COPYING" in the main directory of this archive - * for more details. - * - * (C) Copyright TOSHIBA CORPORATION 2005-2007 - */ - -#include <linux/module.h> -#include <linux/types.h> -#include <linux/ide.h> -#include <linux/init.h> -#include <linux/platform_device.h> -#include <linux/io.h> - -#include <asm/ide.h> -#include <asm/txx9/tx4938.h> - -static void tx4938ide_tune_ebusc(unsigned int ebus_ch, - unsigned int gbus_clock, - u8 pio) -{ - struct ide_timing *t = ide_timing_find_mode(XFER_PIO_0 + pio); - u64 cr = __raw_readq(&tx4938_ebuscptr->cr[ebus_ch]); - unsigned int sp = (cr >> 4) & 3; - unsigned int clock = gbus_clock / (4 - sp); - unsigned int cycle = 1000000000 / clock; - unsigned int shwt; - int wt; - - /* Minimum DIOx- active time */ - wt = DIV_ROUND_UP(t->act8b, cycle) - 2; - /* IORDY setup time: 35ns */ - wt = max_t(int, wt, DIV_ROUND_UP(35, cycle)); - /* actual wait-cycle is max(wt & ~1, 1) */ - if (wt > 2 && (wt & 1)) - wt++; - wt &= ~1; - /* Address-valid to DIOR/DIOW setup */ - shwt = DIV_ROUND_UP(t->setup, cycle); - - /* -DIOx recovery time (SHWT * 4) and cycle time requirement */ - while ((shwt * 4 + wt + (wt ? 2 : 3)) * cycle < t->cycle) - shwt++; - if (shwt > 7) { - pr_warn("tx4938ide: SHWT violation (%d)\n", shwt); - shwt = 7; - } - pr_debug("tx4938ide: ebus %d, bus cycle %dns, WT %d, SHWT %d\n", - ebus_ch, cycle, wt, shwt); - - __raw_writeq((cr & ~0x3f007ull) | (wt << 12) | shwt, - &tx4938_ebuscptr->cr[ebus_ch]); -} - -static void tx4938ide_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive) -{ - struct tx4938ide_platform_info *pdata = dev_get_platdata(hwif->dev); - u8 safe = drive->pio_mode - XFER_PIO_0; - ide_drive_t *pair; - - pair = ide_get_pair_dev(drive); - if (pair) - safe = min_t(u8, safe, pair->pio_mode - XFER_PIO_0); - tx4938ide_tune_ebusc(pdata->ebus_ch, pdata->gbus_clock, safe); -} - -#ifdef __BIG_ENDIAN - -/* custom iops (independent from SWAP_IO_SPACE) */ -static void tx4938ide_input_data_swap(ide_drive_t *drive, struct ide_cmd *cmd, - void *buf, unsigned int len) -{ - unsigned long port = drive->hwif->io_ports.data_addr; - unsigned short *ptr = buf; - unsigned int count = (len + 1) / 2; - - while (count--) - *ptr++ = cpu_to_le16(__raw_readw((void __iomem *)port)); - __ide_flush_dcache_range((unsigned long)buf, roundup(len, 2)); -} - -static void tx4938ide_output_data_swap(ide_drive_t *drive, struct ide_cmd *cmd, - void *buf, unsigned int len) -{ - unsigned long port = drive->hwif->io_ports.data_addr; - unsigned short *ptr = buf; - unsigned int count = (len + 1) / 2; - - while (count--) { - __raw_writew(le16_to_cpu(*ptr), (void __iomem *)port); - ptr++; - } - __ide_flush_dcache_range((unsigned long)buf, roundup(len, 2)); -} - -static const struct ide_tp_ops tx4938ide_tp_ops = { - .exec_command = ide_exec_command, - .read_status = ide_read_status, - .read_altstatus = ide_read_altstatus, - .write_devctl = ide_write_devctl, - - .dev_select = ide_dev_select, - .tf_load = ide_tf_load, - .tf_read = ide_tf_read, - - .input_data = tx4938ide_input_data_swap, - .output_data = tx4938ide_output_data_swap, -}; - -#endif /* __BIG_ENDIAN */ - -static const struct ide_port_ops tx4938ide_port_ops = { - .set_pio_mode = tx4938ide_set_pio_mode, -}; - -static const struct ide_port_info tx4938ide_port_info __initconst = { - .port_ops = &tx4938ide_port_ops, -#ifdef __BIG_ENDIAN - .tp_ops = &tx4938ide_tp_ops, -#endif - .host_flags = IDE_HFLAG_MMIO | IDE_HFLAG_NO_DMA, - .pio_mask = ATA_PIO5, - .chipset = ide_generic, -}; - -static int __init tx4938ide_probe(struct platform_device *pdev) -{ - struct ide_hw hw, *hws[] = { &hw }; - struct ide_host *host; - struct resource *res; - struct tx4938ide_platform_info *pdata = dev_get_platdata(&pdev->dev); - int irq, ret, i; - unsigned long mapbase, mapctl; - struct ide_port_info d = tx4938ide_port_info; - - irq = platform_get_irq(pdev, 0); - if (irq < 0) - return -ENODEV; - res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - if (!res) - return -ENODEV; - - if (!devm_request_mem_region(&pdev->dev, res->start, - resource_size(res), "tx4938ide")) - return -EBUSY; - mapbase = (unsigned long)devm_ioremap(&pdev->dev, res->start, - 8 << pdata->ioport_shift); - mapctl = (unsigned long)devm_ioremap(&pdev->dev, - res->start + 0x10000 + - (6 << pdata->ioport_shift), - 1 << pdata->ioport_shift); - if (!mapbase || !mapctl) - return -EBUSY; - - memset(&hw, 0, sizeof(hw)); - if (pdata->ioport_shift) { - unsigned long port = mapbase; - unsigned long ctl = mapctl; - - hw.io_ports_array[0] = port; -#ifdef __BIG_ENDIAN - port++; - ctl++; -#endif - for (i = 1; i <= 7; i++) - hw.io_ports_array[i] = - port + (i << pdata->ioport_shift); - hw.io_ports.ctl_addr = ctl; - } else - ide_std_init_ports(&hw, mapbase, mapctl); - hw.irq = irq; - hw.dev = &pdev->dev; - - pr_info("TX4938 IDE interface (base %#lx, ctl %#lx, irq %d)\n", - mapbase, mapctl, hw.irq); - if (pdata->gbus_clock) - tx4938ide_tune_ebusc(pdata->ebus_ch, pdata->gbus_clock, 0); - else - d.port_ops = NULL; - ret = ide_host_add(&d, hws, 1, &host); - if (!ret) - platform_set_drvdata(pdev, host); - return ret; -} - -static int __exit tx4938ide_remove(struct platform_device *pdev) -{ - struct ide_host *host = platform_get_drvdata(pdev); - - ide_host_remove(host); - return 0; -} - -static struct platform_driver tx4938ide_driver = { - .driver = { - .name = "tx4938ide", - }, - .remove = __exit_p(tx4938ide_remove), -}; - -module_platform_driver_probe(tx4938ide_driver, tx4938ide_probe); - -MODULE_DESCRIPTION("TX4938 internal IDE driver"); -MODULE_LICENSE("GPL"); -MODULE_ALIAS("platform:tx4938ide"); |