[PATCH] ide: add it8213 driver
From: Jack Lee <Jack.Lee@xxxxxxxxxx>
From: Alan Cox <alan@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@xxxxxxxxx>
---
drivers/ide/Kconfig | 5
drivers/ide/pci/Makefile | 2
drivers/ide/pci/it8213.c | 402 +++++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 408 insertions(+), 1 deletion(-)
Index: a/drivers/ide/Kconfig
===================================================================
--- a.orig/drivers/ide/Kconfig
+++ a/drivers/ide/Kconfig
@@ -606,6 +606,11 @@ config BLK_DEV_PIIX
the kernel to change PIO, DMA and UDMA speeds and to configure
the chip to optimum performance.
+config BLK_DEV_IT8213
+ tristate "IT8213 IDE support"
+ help
+ This driver adds support for the ITE 8213 IDE controller.
+
config BLK_DEV_IT821X
tristate "IT821X IDE support"
help
Index: a/drivers/ide/pci/Makefile
===================================================================
--- a.orig/drivers/ide/pci/Makefile
+++ a/drivers/ide/pci/Makefile
@@ -11,7 +11,7 @@ obj-$(CONFIG_BLK_DEV_SC1200) += sc1200.
obj-$(CONFIG_BLK_DEV_CY82C693) += cy82c693.o
obj-$(CONFIG_BLK_DEV_HPT34X) += hpt34x.o
obj-$(CONFIG_BLK_DEV_HPT366) += hpt366.o
-#obj-$(CONFIG_BLK_DEV_HPT37X) += hpt37x.o
+obj-$(CONFIG_BLK_DEV_IT8213) += it8213.o
obj-$(CONFIG_BLK_DEV_IT821X) += it821x.o
obj-$(CONFIG_BLK_DEV_JMICRON) += jmicron.o
obj-$(CONFIG_BLK_DEV_NS87415) += ns87415.o
Index: a/drivers/ide/pci/it8213.c
===================================================================
--- /dev/null
+++ a/drivers/ide/pci/it8213.c
@@ -0,0 +1,402 @@
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/delay.h>
+#include <linux/hdreg.h>
+#include <linux/ide.h>
+#include <linux/init.h>
+
+#include <asm/io.h>
+
+/*
+ * it8213_ratemask - Compute available modes
+ * @drive: IDE drive
+ *
+ * Compute the available speeds for the devices on the interface. This
+ * is all modes to ATA100 clipped by drive cable setup.
+ */
+
+static u8 it8213_ratemask (ide_drive_t *drive)
+{
+ u8 mode = 4;
+ if (!eighty_ninty_three(drive))
+ mode = min(mode, (u8)1);
+ return mode;
+}
+
+/**
+ * it8213_dma_2_pio - return the PIO mode matching DMA
+ * @xfer_rate: transfer speed
+ *
+ * Returns the nearest equivalent PIO timing for the PIO or DMA
+ * mode requested by the controller.
+ */
+
+static u8 it8213_dma_2_pio (u8 xfer_rate) {
+ switch(xfer_rate) {
+ case XFER_UDMA_6:
+ case XFER_UDMA_5:
+ case XFER_UDMA_4:
+ case XFER_UDMA_3:
+ case XFER_UDMA_2:
+ case XFER_UDMA_1:
+ case XFER_UDMA_0:
+ case XFER_MW_DMA_2:
+ case XFER_PIO_4:
+ return 4;
+ case XFER_MW_DMA_1:
+ case XFER_PIO_3:
+ return 3;
+ case XFER_SW_DMA_2:
+ case XFER_PIO_2:
+ return 2;
+ case XFER_MW_DMA_0:
+ case XFER_SW_DMA_1:
+ case XFER_SW_DMA_0:
+ case XFER_PIO_1:
+ case XFER_PIO_0:
+ case XFER_PIO_SLOW:
+ default:
+ return 0;
+ }
+}
+
+static spinlock_t tune_lock = SPIN_LOCK_UNLOCKED;
+
+/*
+ * it8213_tuneproc - tune a drive
+ * @drive: drive to tune
+ * @mode_wanted: the target operating mode
+ *
+ * Load the timing settings for this device mode into the
+ * controller. By the time we are called the mode has been
+ * modified as neccessary to handle the absence of seperate
+ * master/slave timers for MWDMA/PIO.
+ *
+ * This code is only used in pass through mode.
+ */
+
+static void it8213_tuneproc (ide_drive_t *drive, u8 pio)
+{
+ ide_hwif_t *hwif = HWIF(drive);
+ struct pci_dev *dev = hwif->pci_dev;
+ int is_slave = (&hwif->drives[1] == drive);
+ int master_port = 0x40;
+ int slave_port = 0x44;
+ unsigned long flags;
+ u16 master_data;
+ u8 slave_data;
+
+ u8 timings[][2] = { { 0, 0 },
+ { 0, 0 },
+ { 1, 0 },
+ { 2, 1 },
+ { 2, 3 }, };
+
+ pio = ide_get_best_pio_mode(drive, pio, 5, NULL);
+
+ spin_lock_irqsave(&tune_lock, flags);
+ pci_read_config_word(dev, master_port, &master_data);
+ if (is_slave) {
+ master_data = master_data | 0x4000;
+ if (pio > 1)
+
+ master_data = master_data | 0x0070;
+ pci_read_config_byte(dev, slave_port, &slave_data);
+ slave_data = slave_data & 0xf0;
+ slave_data = slave_data | (((timings[pio][0] << 2) | (timings[pio][1]) << 0));
+ } else {
+ master_data = master_data & 0xccf8;
+ if (pio > 1)
+
+ master_data = master_data | 0x0007;
+ master_data = master_data | (timings[pio][0] << 12) | (timings[pio][1] << 8);
+ }
+ pci_write_config_word(dev, master_port, master_data);
+ if (is_slave)
+ pci_write_config_byte(dev, slave_port, slave_data);
+ spin_unlock_irqrestore(&tune_lock, flags);
+}
+
+
+/**
+ * it8213_tune_chipset - set controller timings
+ * @drive: Drive to set up
+ * @xferspeed: speed we want to achieve
+ *
+ * Tune the ITE chipset for the desired mode. If we can't achieve
+ * the desired mode then tune for a lower one, but ultimately
+ * make the thing work.
+ */
+
+static int it8213_tune_chipset (ide_drive_t *drive, byte xferspeed)
+{
+
+ ide_hwif_t *hwif = HWIF(drive);
+ struct pci_dev *dev = hwif->pci_dev;
+ u8 maslave = 0x40;
+ u8 speed = ide_rate_filter(it8213_ratemask(drive), xferspeed);
+ int a_speed = 3 << (drive->dn * 4);
+ int u_flag = 1 << drive->dn;
+ int v_flag = 0x01 << drive->dn;
+ int w_flag = 0x10 << drive->dn;
+ int u_speed = 0;
+ u16 reg4042, reg4a;
+ u8 reg48, reg54, reg55;
+
+ pci_read_config_word(dev, maslave, ®4042);
+ pci_read_config_byte(dev, 0x48, ®48);
+ pci_read_config_word(dev, 0x4a, ®4a);
+ pci_read_config_byte(dev, 0x54, ®54);
+ pci_read_config_byte(dev, 0x55, ®55);
+
+ switch(speed) {
+ case XFER_UDMA_6:
+ case XFER_UDMA_4:
+ case XFER_UDMA_2:u_speed = 2 << (drive->dn * 4); break;
+ case XFER_UDMA_5:
+ case XFER_UDMA_3:
+ case XFER_UDMA_1:u_speed = 1 << (drive->dn * 4); break;
+ case XFER_UDMA_0:u_speed = 0 << (drive->dn * 4); break;
+ break;
+ case XFER_MW_DMA_2:
+ case XFER_MW_DMA_1:
+ case XFER_MW_DMA_0:
+ break;
+ case XFER_PIO_4:
+ case XFER_PIO_3:
+ case XFER_PIO_2:
+ case XFER_PIO_1:
+ case XFER_PIO_0:
+ break;
+ default:
+ return -1;
+ }
+
+ if (speed >= XFER_UDMA_0)
+ {
+ if (!(reg48 & u_flag))
+ pci_write_config_byte(dev, 0x48, reg48 | u_flag);
+ if (speed >= XFER_UDMA_5) {
+ pci_write_config_byte(dev, 0x55, (u8) reg55|w_flag);
+ } else {
+ pci_write_config_byte(dev, 0x55, (u8) reg55 & ~w_flag);
+ }
+
+ if ((reg4a & a_speed) != u_speed)
+ pci_write_config_word(dev, 0x4a, (reg4a & ~a_speed) | u_speed);
+ if (speed > XFER_UDMA_2)
+ {
+ if (!(reg54 & v_flag))
+ pci_write_config_byte(dev, 0x54, reg54 | v_flag);
+ } else
+ pci_write_config_byte(dev, 0x54, reg54 & ~v_flag);
+ } else /*if(speed >= XFER_UDMA_0)*/
+ {
+ if (reg48 & u_flag)
+ pci_write_config_byte(dev, 0x48, reg48 & ~u_flag);
+ if (reg4a & a_speed)
+ pci_write_config_word(dev, 0x4a, reg4a & ~a_speed);
+ if (reg54 & v_flag)
+ pci_write_config_byte(dev, 0x54, reg54 & ~v_flag);
+ if (reg55 & w_flag)
+ pci_write_config_byte(dev, 0x55, (u8) reg55 & ~w_flag);
+ }
+ it8213_tuneproc(drive, it8213_dma_2_pio(speed));
+ return ide_config_drive_speed(drive, speed);
+ }
+
+
+/*
+ * config_chipset_for_dma - configure for DMA
+ * @drive: drive to configure
+ *
+ * Called by the IDE layer when it wants the timings set up.
+ */
+
+static int config_chipset_for_dma (ide_drive_t *drive)
+{
+ u8 speed = ide_dma_speed(drive, it8213_ratemask(drive));
+ if (!speed)
+ {
+ u8 tspeed = ide_get_best_pio_mode(drive, 255, 5, NULL);
+ speed = it8213_dma_2_pio(XFER_PIO_0 + tspeed);
+ }
+// config_it8213_chipset_for_pio(drive, !speed);
+ it8213_tune_chipset(drive, speed);
+ return ide_dma_enable(drive);
+}
+
+/**
+ * config_it8213_chipset_for_pio - set drive timings
+ * @drive: drive to tune
+ * @speed we want
+ *
+ * Compute the best pio mode we can for a given device. We must
+ * pick a speed that does not cause problems with the other device
+ * on the cable.
+ */
+/*
+static void config_it8213_chipset_for_pio (ide_drive_t *drive, byte set_speed)
+{
+ ide_hwif_t *hwif = HWIF(drive);
+// u8 unit = drive->select.b.unit;
+ ide_hwif_t *hwif = drive->hwif;
+ ide_drive_t *pair = &hwif->drives[1-unit];
+ u8 speed = 0, set_pio = ide_get_best_pio_mode(drive, 255, 5, NULL);
+ u8 pair_pio;
+
+ if(pair != NULL) {
+ pair_pio = ide_get_best_pio_mode(pair, 255, 5, NULL);
+ if(pair_pio < set_pio)
+ set_pio = pair_pio;
+ }
+ it8213_tuneproc(drive, set_pio);
+ speed = XFER_PIO_0 + set_pio;
+ if (set_speed)
+ (void) ide_config_drive_speed(drive, speed);
+}
+*/
+/**
+ * it8213_configure_drive_for_dma - set up for DMA transfers
+ * @drive: drive we are going to set up
+ *
+ * Set up the drive for DMA, tune the controller and drive as
+ * required. If the drive isn't suitable for DMA or we hit
+ * other problems then we will drop down to PIO and set up
+ * PIO appropriately
+ */
+
+static int it8213_config_drive_for_dma (ide_drive_t *drive)
+{
+// ide_hwif_t *hwif = drive->hwif;
+// struct hd_driveid *id = drive->id;
+ ide_hwif_t *hwif = HWIF(drive);
+ if (ide_use_dma(drive)) {
+ if (config_chipset_for_dma(drive))
+ return hwif->ide_dma_on(drive);
+ }
+// config_it8213_chipset_for_pio(drive, 1);
+ hwif->tuneproc(drive, 255);
+ return hwif->ide_dma_off_quietly(drive);
+}
+
+
+static unsigned int __devinit init_chipset_it8213(struct pci_dev *dev, const char *name)
+{
+ printk(KERN_INFO "it8213: controller in IDE mode.\n");
+ return 0;
+}
+
+
+/**
+ * init_hwif_it8213 - set up hwif structs
+ * @hwif: interface to set up
+ *
+ * We do the basic set up of the interface structure. The IT8212
+ * requires several custom handlers so we override the default
+ * ide DMA handlers appropriately
+ */
+
+static void __devinit init_hwif_it8213(ide_hwif_t *hwif)
+{
+ u8 reg42h = 0, ata66 = 0;
+ u8 mask = 0x02;
+
+ hwif->atapi_dma = 1;
+
+ hwif->speedproc = &it8213_tune_chipset;
+ hwif->tuneproc = &it8213_tuneproc;
+
+ hwif->autodma = 0;
+
+ hwif->drives[0].autotune = 1;
+ hwif->drives[1].autotune = 1;
+
+ if (!hwif->dma_base)
+ goto fallback;
+ hwif->atapi_dma = 1;
+ hwif->ultra_mask = 0x7f;
+ hwif->mwdma_mask = 0x07;
+ hwif->swdma_mask = 0x07;
+
+ pci_read_config_byte(hwif->pci_dev, 0x42, ®42h);
+ ata66 = (reg42h & mask) ? 0 : 1;
+
+ hwif->ide_dma_check = &it8213_config_drive_for_dma;
+ if (!(hwif->udma_four))
+ hwif->udma_four = ata66;
+// hwif->udma_four = 0;
+
+ /*
+ * The BIOS often doesn't set up DMA on this controller
+ * so we always do it.
+ */
+ if (!noautodma)
+ hwif->autodma = 1;
+
+ hwif->drives[0].autodma = hwif->autodma;
+ hwif->drives[1].autodma = hwif->autodma;
+ return;
+fallback:
+ hwif->autodma = 0;
+ return;
+}
+
+
+#define DECLARE_ITE_DEV(name_str) \
+ { \
+ .name = name_str, \
+ .init_chipset = init_chipset_it8213, \
+ .init_hwif = init_hwif_it8213, \
+ .channels = 1, \
+ .autodma = AUTODMA, \
+ .enablebits = {{0x41,0x80,0x80}}, \
+ .bootable = ON_BOARD, \
+ }
+
+static ide_pci_device_t it8213_chipsets[] __devinitdata = {
+ /* 0 */ DECLARE_ITE_DEV("IT8213"),
+};
+
+
+/**
+ * it8213_init_one - pci layer discovery entry
+ * @dev: PCI device
+ * @id: ident table entry
+ *
+ * Called by the PCI code when it finds an ITE8213 controller. As
+ * this device follows the standard interfaces we can use the
+ * standard helper functions to do almost all the work for us.
+ */
+
+static int __devinit it8213_init_one(struct pci_dev *dev, const struct pci_device_id *id)
+{
+ ide_setup_pci_device(dev, &it8213_chipsets[id->driver_data]);
+ return 0;
+}
+
+
+static struct pci_device_id it8213_pci_tbl[] = {
+ { PCI_VENDOR_ID_ITE, PCI_DEVICE_ID_ITE_8213, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
+ { 0, },
+};
+
+MODULE_DEVICE_TABLE(pci, it8213_pci_tbl);
+
+static struct pci_driver driver = {
+ .name = "ITE8213_IDE",
+ .id_table = it8213_pci_tbl,
+ .probe = it8213_init_one,
+};
+
+static int __init it8213_ide_init(void)
+{
+ return ide_pci_register_driver(&driver); }
+
+module_init(it8213_ide_init);
+
+MODULE_AUTHOR("Jack and Alan Cox"); /* Update this */
+MODULE_DESCRIPTION("PCI driver module for the ITE 8213");
+MODULE_LICENSE("GPL");
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