Merge branch 'linus' into stackprotector

Conflicts:
	arch/x86/include/asm/pda.h
	kernel/fork.c

1 files changed, 588 insertions, 0 deletions

diff --git a/drivers/ide/pdc202xx_new.c b/drivers/ide/pdc202xx_new.c
new file mode 100644
index 00000000000..211ae46e3e0
--- /dev/null
+++ b/drivers/ide/pdc202xx_new.c
@@ -0,0 +1,588 @@
+/*
+ *  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 <asm/io.h>
+
+#ifdef CONFIG_PPC_PMAC
+#include <asm/prom.h>
+#include <asm/pci-bridge.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 const char *pdc_quirk_drives[] = {
+	"QUANTUM FIREBALLlct08 08",
+	"QUANTUM FIREBALLP KA6.4",
+	"QUANTUM FIREBALLP KA9.1",
+	"QUANTUM FIREBALLP LM20.4",
+	"QUANTUM FIREBALLP KX13.6",
+	"QUANTUM FIREBALLP KX20.5",
+	"QUANTUM FIREBALLP KX27.3",
+	"QUANTUM FIREBALLP LM20.5",
+	NULL
+};
+
+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_drive_t *drive, const u8 speed)
+{
+	ide_hwif_t *hwif	= HWIF(drive);
+	struct pci_dev *dev	= to_pci_dev(hwif->dev);
+	u8 adj			= (drive->dn & 1) ? 0x08 : 0x00;
+
+	/*
+	 * 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_drive_t *drive, const u8 pio)
+{
+	ide_hwif_t *hwif = drive->hwif;
+	struct pci_dev *dev = to_pci_dev(hwif->dev);
+	u8 adj = (drive->dn & 1) ? 0x08 : 0x00;
+
+	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_quirkproc(ide_drive_t *drive)
+{
+	const char **list, *m = (char *)&drive->id[ATA_ID_PROD];
+
+	for (list = pdc_quirk_drives; *list != NULL; list++)
+		if (strstr(m, *list) != NULL) {
+			drive->quirk_list = 2;
+			return;
+		}
+
+	drive->quirk_list = 0;
+}
+
+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",
+		HWIF(drive)->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)
+{
+	struct timeval start_time, end_time;
+	long start_count, end_count;
+	long pll_input, usec_elapsed;
+	u8 scr1;
+
+	start_count = read_counter(dma_base);
+	do_gettimeofday(&start_time);
+
+	/* 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);
+	do_gettimeofday(&end_time);
+
+	/* 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 = (end_time.tv_sec - start_time.tv_sec) * 1000000 +
+		(end_time.tv_usec - start_time.tv_usec);
+	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 unsigned 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 dev->irq;
+}
+
+static struct pci_dev * __devinit 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,
+	.quirkproc		= pdcnew_quirkproc,
+	.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[] __devinitdata = {
+	/* 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 __devinit 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 __devexit 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		= __devexit_p(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");