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linux-next/drivers/ide/pdc202xx_new.c
Thomas Gleixner 2874c5fd28 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 
Based on 1 normalized pattern(s):

  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

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-or-later

has been chosen to replace the boilerplate/reference in 3029 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Allison Randal <allison@lohutok.net>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190527070032.746973796@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-05-30 11:26:32 -07:00

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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Promise TX2/TX4/TX2000/133 IDE driver
*
* 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");
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