diff options
Diffstat (limited to 'drivers/ide/pdc202xx_new.c')
| -rw-r--r-- | drivers/ide/pdc202xx_new.c | 561 |
1 files changed, 561 insertions, 0 deletions
diff --git a/drivers/ide/pdc202xx_new.c b/drivers/ide/pdc202xx_new.c new file mode 100644 index 000000000..b33646be6 --- /dev/null +++ b/drivers/ide/pdc202xx_new.c @@ -0,0 +1,561 @@ +/* + * Promise TX2/TX4/TX2000/133 IDE driver + * + * 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. + * + * Split from: + * linux/drivers/ide/pdc202xx.c Version 0.35 Mar. 30, 2002 + * Copyright (C) 1998-2002 Andre Hedrick <andre@linux-ide.org> + * Copyright (C) 2005-2007 MontaVista Software, Inc. + * Portions Copyright (C) 1999 Promise Technology, Inc. + * Author: Frank Tiernan (frankt@promise.com) + * Released under terms of General Public License + */ + +#include <linux/module.h> +#include <linux/types.h> +#include <linux/kernel.h> +#include <linux/delay.h> +#include <linux/pci.h> +#include <linux/init.h> +#include <linux/ide.h> +#include <linux/ktime.h> + +#include <asm/io.h> + +#ifdef CONFIG_PPC_PMAC +#include <asm/prom.h> +#endif + +#define DRV_NAME "pdc202xx_new" + +#undef DEBUG + +#ifdef DEBUG +#define DBG(fmt, args...) printk("%s: " fmt, __func__, ## args) +#else +#define DBG(fmt, args...) +#endif + +static u8 max_dma_rate(struct pci_dev *pdev) +{ + u8 mode; + + switch(pdev->device) { + case PCI_DEVICE_ID_PROMISE_20277: + case PCI_DEVICE_ID_PROMISE_20276: + case PCI_DEVICE_ID_PROMISE_20275: + case PCI_DEVICE_ID_PROMISE_20271: + case PCI_DEVICE_ID_PROMISE_20269: + mode = 4; + break; + case PCI_DEVICE_ID_PROMISE_20270: + case PCI_DEVICE_ID_PROMISE_20268: + mode = 3; + break; + default: + return 0; + } + + return mode; +} + +/** + * get_indexed_reg - Get indexed register + * @hwif: for the port address + * @index: index of the indexed register + */ +static u8 get_indexed_reg(ide_hwif_t *hwif, u8 index) +{ + u8 value; + + outb(index, hwif->dma_base + 1); + value = inb(hwif->dma_base + 3); + + DBG("index[%02X] value[%02X]\n", index, value); + return value; +} + +/** + * set_indexed_reg - Set indexed register + * @hwif: for the port address + * @index: index of the indexed register + */ +static void set_indexed_reg(ide_hwif_t *hwif, u8 index, u8 value) +{ + outb(index, hwif->dma_base + 1); + outb(value, hwif->dma_base + 3); + DBG("index[%02X] value[%02X]\n", index, value); +} + +/* + * ATA Timing Tables based on 133 MHz PLL output clock. + * + * If the PLL outputs 100 MHz clock, the ASIC hardware will set + * the timing registers automatically when "set features" command is + * issued to the device. However, if the PLL output clock is 133 MHz, + * the following tables must be used. + */ +static struct pio_timing { + u8 reg0c, reg0d, reg13; +} pio_timings [] = { + { 0xfb, 0x2b, 0xac }, /* PIO mode 0, IORDY off, Prefetch off */ + { 0x46, 0x29, 0xa4 }, /* PIO mode 1, IORDY off, Prefetch off */ + { 0x23, 0x26, 0x64 }, /* PIO mode 2, IORDY off, Prefetch off */ + { 0x27, 0x0d, 0x35 }, /* PIO mode 3, IORDY on, Prefetch off */ + { 0x23, 0x09, 0x25 }, /* PIO mode 4, IORDY on, Prefetch off */ +}; + +static struct mwdma_timing { + u8 reg0e, reg0f; +} mwdma_timings [] = { + { 0xdf, 0x5f }, /* MWDMA mode 0 */ + { 0x6b, 0x27 }, /* MWDMA mode 1 */ + { 0x69, 0x25 }, /* MWDMA mode 2 */ +}; + +static struct udma_timing { + u8 reg10, reg11, reg12; +} udma_timings [] = { + { 0x4a, 0x0f, 0xd5 }, /* UDMA mode 0 */ + { 0x3a, 0x0a, 0xd0 }, /* UDMA mode 1 */ + { 0x2a, 0x07, 0xcd }, /* UDMA mode 2 */ + { 0x1a, 0x05, 0xcd }, /* UDMA mode 3 */ + { 0x1a, 0x03, 0xcd }, /* UDMA mode 4 */ + { 0x1a, 0x02, 0xcb }, /* UDMA mode 5 */ + { 0x1a, 0x01, 0xcb }, /* UDMA mode 6 */ +}; + +static void pdcnew_set_dma_mode(ide_hwif_t *hwif, ide_drive_t *drive) +{ + struct pci_dev *dev = to_pci_dev(hwif->dev); + u8 adj = (drive->dn & 1) ? 0x08 : 0x00; + const u8 speed = drive->dma_mode; + + /* + * IDE core issues SETFEATURES_XFER to the drive first (thanks to + * IDE_HFLAG_POST_SET_MODE in ->host_flags). PDC202xx hardware will + * automatically set the timing registers based on 100 MHz PLL output. + * + * As we set up the PLL to output 133 MHz for UltraDMA/133 capable + * chips, we must override the default register settings... + */ + if (max_dma_rate(dev) == 4) { + u8 mode = speed & 0x07; + + if (speed >= XFER_UDMA_0) { + set_indexed_reg(hwif, 0x10 + adj, + udma_timings[mode].reg10); + set_indexed_reg(hwif, 0x11 + adj, + udma_timings[mode].reg11); + set_indexed_reg(hwif, 0x12 + adj, + udma_timings[mode].reg12); + } else { + set_indexed_reg(hwif, 0x0e + adj, + mwdma_timings[mode].reg0e); + set_indexed_reg(hwif, 0x0f + adj, + mwdma_timings[mode].reg0f); + } + } else if (speed == XFER_UDMA_2) { + /* Set tHOLD bit to 0 if using UDMA mode 2 */ + u8 tmp = get_indexed_reg(hwif, 0x10 + adj); + + set_indexed_reg(hwif, 0x10 + adj, tmp & 0x7f); + } +} + +static void pdcnew_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive) +{ + struct pci_dev *dev = to_pci_dev(hwif->dev); + u8 adj = (drive->dn & 1) ? 0x08 : 0x00; + const u8 pio = drive->pio_mode - XFER_PIO_0; + + if (max_dma_rate(dev) == 4) { + set_indexed_reg(hwif, 0x0c + adj, pio_timings[pio].reg0c); + set_indexed_reg(hwif, 0x0d + adj, pio_timings[pio].reg0d); + set_indexed_reg(hwif, 0x13 + adj, pio_timings[pio].reg13); + } +} + +static u8 pdcnew_cable_detect(ide_hwif_t *hwif) +{ + if (get_indexed_reg(hwif, 0x0b) & 0x04) + return ATA_CBL_PATA40; + else + return ATA_CBL_PATA80; +} + +static void pdcnew_reset(ide_drive_t *drive) +{ + /* + * Deleted this because it is redundant from the caller. + */ + printk(KERN_WARNING "pdc202xx_new: %s channel reset.\n", + drive->hwif->channel ? "Secondary" : "Primary"); +} + +/** + * read_counter - Read the byte count registers + * @dma_base: for the port address + */ +static long read_counter(u32 dma_base) +{ + u32 pri_dma_base = dma_base, sec_dma_base = dma_base + 0x08; + u8 cnt0, cnt1, cnt2, cnt3; + long count = 0, last; + int retry = 3; + + do { + last = count; + + /* Read the current count */ + outb(0x20, pri_dma_base + 0x01); + cnt0 = inb(pri_dma_base + 0x03); + outb(0x21, pri_dma_base + 0x01); + cnt1 = inb(pri_dma_base + 0x03); + outb(0x20, sec_dma_base + 0x01); + cnt2 = inb(sec_dma_base + 0x03); + outb(0x21, sec_dma_base + 0x01); + cnt3 = inb(sec_dma_base + 0x03); + + count = (cnt3 << 23) | (cnt2 << 15) | (cnt1 << 8) | cnt0; + + /* + * The 30-bit decrementing counter is read in 4 pieces. + * Incorrect value may be read when the most significant bytes + * are changing... + */ + } while (retry-- && (((last ^ count) & 0x3fff8000) || last < count)); + + DBG("cnt0[%02X] cnt1[%02X] cnt2[%02X] cnt3[%02X]\n", + cnt0, cnt1, cnt2, cnt3); + + return count; +} + +/** + * detect_pll_input_clock - Detect the PLL input clock in Hz. + * @dma_base: for the port address + * E.g. 16949000 on 33 MHz PCI bus, i.e. half of the PCI clock. + */ +static long detect_pll_input_clock(unsigned long dma_base) +{ + ktime_t start_time, end_time; + long start_count, end_count; + long pll_input, usec_elapsed; + u8 scr1; + + start_count = read_counter(dma_base); + start_time = ktime_get(); + + /* Start the test mode */ + outb(0x01, dma_base + 0x01); + scr1 = inb(dma_base + 0x03); + DBG("scr1[%02X]\n", scr1); + outb(scr1 | 0x40, dma_base + 0x03); + + /* Let the counter run for 10 ms. */ + mdelay(10); + + end_count = read_counter(dma_base); + end_time = ktime_get(); + + /* Stop the test mode */ + outb(0x01, dma_base + 0x01); + scr1 = inb(dma_base + 0x03); + DBG("scr1[%02X]\n", scr1); + outb(scr1 & ~0x40, dma_base + 0x03); + + /* + * Calculate the input clock in Hz + * (the clock counter is 30 bit wide and counts down) + */ + usec_elapsed = ktime_us_delta(end_time, start_time); + pll_input = ((start_count - end_count) & 0x3fffffff) / 10 * + (10000000 / usec_elapsed); + + DBG("start[%ld] end[%ld]\n", start_count, end_count); + + return pll_input; +} + +#ifdef CONFIG_PPC_PMAC +static void apple_kiwi_init(struct pci_dev *pdev) +{ + struct device_node *np = pci_device_to_OF_node(pdev); + u8 conf; + + if (np == NULL || !of_device_is_compatible(np, "kiwi-root")) + return; + + if (pdev->revision >= 0x03) { + /* Setup chip magic config stuff (from darwin) */ + pci_read_config_byte (pdev, 0x40, &conf); + pci_write_config_byte(pdev, 0x40, (conf | 0x01)); + } +} +#endif /* CONFIG_PPC_PMAC */ + +static int init_chipset_pdcnew(struct pci_dev *dev) +{ + const char *name = DRV_NAME; + unsigned long dma_base = pci_resource_start(dev, 4); + unsigned long sec_dma_base = dma_base + 0x08; + long pll_input, pll_output, ratio; + int f, r; + u8 pll_ctl0, pll_ctl1; + + if (dma_base == 0) + return -EFAULT; + +#ifdef CONFIG_PPC_PMAC + apple_kiwi_init(dev); +#endif + + /* Calculate the required PLL output frequency */ + switch(max_dma_rate(dev)) { + case 4: /* it's 133 MHz for Ultra133 chips */ + pll_output = 133333333; + break; + case 3: /* and 100 MHz for Ultra100 chips */ + default: + pll_output = 100000000; + break; + } + + /* + * Detect PLL input clock. + * On some systems, where PCI bus is running at non-standard clock rate + * (e.g. 25 or 40 MHz), we have to adjust the cycle time. + * PDC20268 and newer chips employ PLL circuit to help correct timing + * registers setting. + */ + pll_input = detect_pll_input_clock(dma_base); + printk(KERN_INFO "%s %s: PLL input clock is %ld kHz\n", + name, pci_name(dev), pll_input / 1000); + + /* Sanity check */ + if (unlikely(pll_input < 5000000L || pll_input > 70000000L)) { + printk(KERN_ERR "%s %s: Bad PLL input clock %ld Hz, giving up!" + "\n", name, pci_name(dev), pll_input); + goto out; + } + +#ifdef DEBUG + DBG("pll_output is %ld Hz\n", pll_output); + + /* Show the current clock value of PLL control register + * (maybe already configured by the BIOS) + */ + outb(0x02, sec_dma_base + 0x01); + pll_ctl0 = inb(sec_dma_base + 0x03); + outb(0x03, sec_dma_base + 0x01); + pll_ctl1 = inb(sec_dma_base + 0x03); + + DBG("pll_ctl[%02X][%02X]\n", pll_ctl0, pll_ctl1); +#endif + + /* + * Calculate the ratio of F, R and NO + * POUT = (F + 2) / (( R + 2) * NO) + */ + ratio = pll_output / (pll_input / 1000); + if (ratio < 8600L) { /* 8.6x */ + /* Using NO = 0x01, R = 0x0d */ + r = 0x0d; + } else if (ratio < 12900L) { /* 12.9x */ + /* Using NO = 0x01, R = 0x08 */ + r = 0x08; + } else if (ratio < 16100L) { /* 16.1x */ + /* Using NO = 0x01, R = 0x06 */ + r = 0x06; + } else if (ratio < 64000L) { /* 64x */ + r = 0x00; + } else { + /* Invalid ratio */ + printk(KERN_ERR "%s %s: Bad ratio %ld, giving up!\n", + name, pci_name(dev), ratio); + goto out; + } + + f = (ratio * (r + 2)) / 1000 - 2; + + DBG("F[%d] R[%d] ratio*1000[%ld]\n", f, r, ratio); + + if (unlikely(f < 0 || f > 127)) { + /* Invalid F */ + printk(KERN_ERR "%s %s: F[%d] invalid!\n", + name, pci_name(dev), f); + goto out; + } + + pll_ctl0 = (u8) f; + pll_ctl1 = (u8) r; + + DBG("Writing pll_ctl[%02X][%02X]\n", pll_ctl0, pll_ctl1); + + outb(0x02, sec_dma_base + 0x01); + outb(pll_ctl0, sec_dma_base + 0x03); + outb(0x03, sec_dma_base + 0x01); + outb(pll_ctl1, sec_dma_base + 0x03); + + /* Wait the PLL circuit to be stable */ + mdelay(30); + +#ifdef DEBUG + /* + * Show the current clock value of PLL control register + */ + outb(0x02, sec_dma_base + 0x01); + pll_ctl0 = inb(sec_dma_base + 0x03); + outb(0x03, sec_dma_base + 0x01); + pll_ctl1 = inb(sec_dma_base + 0x03); + + DBG("pll_ctl[%02X][%02X]\n", pll_ctl0, pll_ctl1); +#endif + + out: + return 0; +} + +static struct pci_dev *pdc20270_get_dev2(struct pci_dev *dev) +{ + struct pci_dev *dev2; + + dev2 = pci_get_slot(dev->bus, PCI_DEVFN(PCI_SLOT(dev->devfn) + 1, + PCI_FUNC(dev->devfn))); + + if (dev2 && + dev2->vendor == dev->vendor && + dev2->device == dev->device) { + + if (dev2->irq != dev->irq) { + dev2->irq = dev->irq; + printk(KERN_INFO DRV_NAME " %s: PCI config space " + "interrupt fixed\n", pci_name(dev)); + } + + return dev2; + } + + return NULL; +} + +static const struct ide_port_ops pdcnew_port_ops = { + .set_pio_mode = pdcnew_set_pio_mode, + .set_dma_mode = pdcnew_set_dma_mode, + .resetproc = pdcnew_reset, + .cable_detect = pdcnew_cable_detect, +}; + +#define DECLARE_PDCNEW_DEV(udma) \ + { \ + .name = DRV_NAME, \ + .init_chipset = init_chipset_pdcnew, \ + .port_ops = &pdcnew_port_ops, \ + .host_flags = IDE_HFLAG_POST_SET_MODE | \ + IDE_HFLAG_ERROR_STOPS_FIFO | \ + IDE_HFLAG_OFF_BOARD, \ + .pio_mask = ATA_PIO4, \ + .mwdma_mask = ATA_MWDMA2, \ + .udma_mask = udma, \ + } + +static const struct ide_port_info pdcnew_chipsets[] = { + /* 0: PDC202{68,70} */ DECLARE_PDCNEW_DEV(ATA_UDMA5), + /* 1: PDC202{69,71,75,76,77} */ DECLARE_PDCNEW_DEV(ATA_UDMA6), +}; + +/** + * pdc202new_init_one - called when a pdc202xx is found + * @dev: the pdc202new device + * @id: the matching pci id + * + * Called when the PCI registration layer (or the IDE initialization) + * finds a device matching our IDE device tables. + */ + +static int pdc202new_init_one(struct pci_dev *dev, const struct pci_device_id *id) +{ + const struct ide_port_info *d = &pdcnew_chipsets[id->driver_data]; + struct pci_dev *bridge = dev->bus->self; + + if (dev->device == PCI_DEVICE_ID_PROMISE_20270 && bridge && + bridge->vendor == PCI_VENDOR_ID_DEC && + bridge->device == PCI_DEVICE_ID_DEC_21150) { + struct pci_dev *dev2; + + if (PCI_SLOT(dev->devfn) & 2) + return -ENODEV; + + dev2 = pdc20270_get_dev2(dev); + + if (dev2) { + int ret = ide_pci_init_two(dev, dev2, d, NULL); + if (ret < 0) + pci_dev_put(dev2); + return ret; + } + } + + if (dev->device == PCI_DEVICE_ID_PROMISE_20276 && bridge && + bridge->vendor == PCI_VENDOR_ID_INTEL && + (bridge->device == PCI_DEVICE_ID_INTEL_I960 || + bridge->device == PCI_DEVICE_ID_INTEL_I960RM)) { + printk(KERN_INFO DRV_NAME " %s: attached to I2O RAID controller," + " skipping\n", pci_name(dev)); + return -ENODEV; + } + + return ide_pci_init_one(dev, d, NULL); +} + +static void pdc202new_remove(struct pci_dev *dev) +{ + struct ide_host *host = pci_get_drvdata(dev); + struct pci_dev *dev2 = host->dev[1] ? to_pci_dev(host->dev[1]) : NULL; + + ide_pci_remove(dev); + pci_dev_put(dev2); +} + +static const struct pci_device_id pdc202new_pci_tbl[] = { + { PCI_VDEVICE(PROMISE, PCI_DEVICE_ID_PROMISE_20268), 0 }, + { PCI_VDEVICE(PROMISE, PCI_DEVICE_ID_PROMISE_20269), 1 }, + { PCI_VDEVICE(PROMISE, PCI_DEVICE_ID_PROMISE_20270), 0 }, + { PCI_VDEVICE(PROMISE, PCI_DEVICE_ID_PROMISE_20271), 1 }, + { PCI_VDEVICE(PROMISE, PCI_DEVICE_ID_PROMISE_20275), 1 }, + { PCI_VDEVICE(PROMISE, PCI_DEVICE_ID_PROMISE_20276), 1 }, + { PCI_VDEVICE(PROMISE, PCI_DEVICE_ID_PROMISE_20277), 1 }, + { 0, }, +}; +MODULE_DEVICE_TABLE(pci, pdc202new_pci_tbl); + +static struct pci_driver pdc202new_pci_driver = { + .name = "Promise_IDE", + .id_table = pdc202new_pci_tbl, + .probe = pdc202new_init_one, + .remove = pdc202new_remove, + .suspend = ide_pci_suspend, + .resume = ide_pci_resume, +}; + +static int __init pdc202new_ide_init(void) +{ + return ide_pci_register_driver(&pdc202new_pci_driver); +} + +static void __exit pdc202new_ide_exit(void) +{ + pci_unregister_driver(&pdc202new_pci_driver); +} + +module_init(pdc202new_ide_init); +module_exit(pdc202new_ide_exit); + +MODULE_AUTHOR("Andre Hedrick, Frank Tiernan"); +MODULE_DESCRIPTION("PCI driver module for Promise PDC20268 and higher"); +MODULE_LICENSE("GPL"); |