--- /dev/null
+/*
+ * pata_atp867x.c - ARTOP 867X 64bit 4-channel UDMA133 ATA controller driver
+ *
+ * (C) 2009 Google Inc. John(Jung-Ik) Lee <jilee@google.com>
+ *
+ * Per Atp867 data sheet rev 1.2, Acard.
+ * Based in part on early ide code from
+ * 2003-2004 by Eric Uhrhane, Google, Inc.
+ *
+ * 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.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ *
+ * TODO:
+ * 1. RAID features [comparison, XOR, striping, mirroring, etc.]
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/init.h>
+#include <linux/blkdev.h>
+#include <linux/delay.h>
+#include <linux/device.h>
+#include <scsi/scsi_host.h>
+#include <linux/libata.h>
+
+#define DRV_NAME "pata_atp867x"
+#define DRV_VERSION "0.7.5"
+
+/*
+ * IO Registers
+ * Note that all runtime hot priv ports are cached in ap private_data
+ */
+
+enum {
+ ATP867X_IO_CHANNEL_OFFSET = 0x10,
+
+ /*
+ * IO Register Bitfields
+ */
+
+ ATP867X_IO_PIOSPD_ACTIVE_SHIFT = 4,
+ ATP867X_IO_PIOSPD_RECOVER_SHIFT = 0,
+
+ ATP867X_IO_DMAMODE_MSTR_SHIFT = 0,
+ ATP867X_IO_DMAMODE_MSTR_MASK = 0x07,
+ ATP867X_IO_DMAMODE_SLAVE_SHIFT = 4,
+ ATP867X_IO_DMAMODE_SLAVE_MASK = 0x70,
+
+ ATP867X_IO_DMAMODE_UDMA_6 = 0x07,
+ ATP867X_IO_DMAMODE_UDMA_5 = 0x06,
+ ATP867X_IO_DMAMODE_UDMA_4 = 0x05,
+ ATP867X_IO_DMAMODE_UDMA_3 = 0x04,
+ ATP867X_IO_DMAMODE_UDMA_2 = 0x03,
+ ATP867X_IO_DMAMODE_UDMA_1 = 0x02,
+ ATP867X_IO_DMAMODE_UDMA_0 = 0x01,
+ ATP867X_IO_DMAMODE_DISABLE = 0x00,
+
+ ATP867X_IO_SYS_INFO_66MHZ = 0x04,
+ ATP867X_IO_SYS_INFO_SLOW_UDMA5 = 0x02,
+ ATP867X_IO_SYS_MASK_RESERVED = (~0xf1),
+
+ ATP867X_IO_PORTSPD_VAL = 0x1143,
+ ATP867X_PREREAD_VAL = 0x0200,
+
+ ATP867X_NUM_PORTS = 4,
+ ATP867X_BAR_IOBASE = 0,
+ ATP867X_BAR_ROMBASE = 6,
+};
+
+#define ATP867X_IOBASE(ap) ((ap)->host->iomap[0])
+#define ATP867X_SYS_INFO(ap) (0x3F + ATP867X_IOBASE(ap))
+
+#define ATP867X_IO_PORTBASE(ap, port) (0x00 + ATP867X_IOBASE(ap) + \
+ (port) * ATP867X_IO_CHANNEL_OFFSET)
+#define ATP867X_IO_DMABASE(ap, port) (0x40 + \
+ ATP867X_IO_PORTBASE((ap), (port)))
+
+#define ATP867X_IO_STATUS(ap, port) (0x07 + \
+ ATP867X_IO_PORTBASE((ap), (port)))
+#define ATP867X_IO_ALTSTATUS(ap, port) (0x0E + \
+ ATP867X_IO_PORTBASE((ap), (port)))
+
+/*
+ * hot priv ports
+ */
+#define ATP867X_IO_MSTRPIOSPD(ap, port) (0x08 + \
+ ATP867X_IO_DMABASE((ap), (port)))
+#define ATP867X_IO_SLAVPIOSPD(ap, port) (0x09 + \
+ ATP867X_IO_DMABASE((ap), (port)))
+#define ATP867X_IO_8BPIOSPD(ap, port) (0x0A + \
+ ATP867X_IO_DMABASE((ap), (port)))
+#define ATP867X_IO_DMAMODE(ap, port) (0x0B + \
+ ATP867X_IO_DMABASE((ap), (port)))
+
+#define ATP867X_IO_PORTSPD(ap, port) (0x4A + \
+ ATP867X_IO_PORTBASE((ap), (port)))
+#define ATP867X_IO_PREREAD(ap, port) (0x4C + \
+ ATP867X_IO_PORTBASE((ap), (port)))
+
+struct atp867x_priv {
+ void __iomem *dma_mode;
+ void __iomem *mstr_piospd;
+ void __iomem *slave_piospd;
+ void __iomem *eightb_piospd;
+ int pci66mhz;
+};
+
+static inline u8 atp867x_speed_to_mode(u8 speed)
+{
+ return speed - XFER_UDMA_0 + 1;
+}
+
+static void atp867x_set_dmamode(struct ata_port *ap, struct ata_device *adev)
+{
+ struct pci_dev *pdev = to_pci_dev(ap->host->dev);
+ struct atp867x_priv *dp = ap->private_data;
+ u8 speed = adev->dma_mode;
+ u8 b;
+ u8 mode;
+
+ mode = atp867x_speed_to_mode(speed);
+
+ /*
+ * Doc 6.6.9: decrease the udma mode value by 1 for safer UDMA speed
+ * on 66MHz bus
+ * rev-A: UDMA_1~4 (5, 6 no change)
+ * rev-B: all UDMA modes
+ * UDMA_0 stays not to disable UDMA
+ */
+ if (dp->pci66mhz && mode > ATP867X_IO_DMAMODE_UDMA_0 &&
+ (pdev->device == PCI_DEVICE_ID_ARTOP_ATP867B ||
+ mode < ATP867X_IO_DMAMODE_UDMA_5))
+ mode--;
+
+ b = ioread8(dp->dma_mode);
+ if (adev->devno & 1) {
+ b = (b & ~ATP867X_IO_DMAMODE_SLAVE_MASK) |
+ (mode << ATP867X_IO_DMAMODE_SLAVE_SHIFT);
+ } else {
+ b = (b & ~ATP867X_IO_DMAMODE_MSTR_MASK) |
+ (mode << ATP867X_IO_DMAMODE_MSTR_SHIFT);
+ }
+ iowrite8(b, dp->dma_mode);
+}
+
+static int atp867x_get_active_clocks_shifted(unsigned int clk)
+{
+ unsigned char clocks = clk;
+
+ switch (clocks) {
+ case 0:
+ clocks = 1;
+ break;
+ case 1 ... 7:
+ break;
+ case 8 ... 12:
+ clocks = 7;
+ break;
+ default:
+ printk(KERN_WARNING "ATP867X: active %dclk is invalid. "
+ "Using default 8clk.\n", clk);
+ clocks = 0; /* 8 clk */
+ break;
+ }
+ return clocks << ATP867X_IO_PIOSPD_ACTIVE_SHIFT;
+}
+
+static int atp867x_get_recover_clocks_shifted(unsigned int clk)
+{
+ unsigned char clocks = clk;
+
+ switch (clocks) {
+ case 0:
+ clocks = 1;
+ break;
+ case 1 ... 11:
+ break;
+ case 12:
+ clocks = 0;
+ break;
+ case 13: case 14:
+ --clocks;
+ break;
+ case 15:
+ break;
+ default:
+ printk(KERN_WARNING "ATP867X: recover %dclk is invalid. "
+ "Using default 15clk.\n", clk);
+ clocks = 0; /* 12 clk */
+ break;
+ }
+ return clocks << ATP867X_IO_PIOSPD_RECOVER_SHIFT;
+}
+
+static void atp867x_set_piomode(struct ata_port *ap, struct ata_device *adev)
+{
+ struct ata_device *peer = ata_dev_pair(adev);
+ struct atp867x_priv *dp = ap->private_data;
+ u8 speed = adev->pio_mode;
+ struct ata_timing t, p;
+ int T, UT;
+ u8 b;
+
+ T = 1000000000 / 33333;
+ UT = T / 4;
+
+ ata_timing_compute(adev, speed, &t, T, UT);
+ if (peer && peer->pio_mode) {
+ ata_timing_compute(peer, peer->pio_mode, &p, T, UT);
+ ata_timing_merge(&p, &t, &t, ATA_TIMING_8BIT);
+ }
+
+ b = ioread8(dp->dma_mode);
+ if (adev->devno & 1)
+ b = (b & ~ATP867X_IO_DMAMODE_SLAVE_MASK);
+ else
+ b = (b & ~ATP867X_IO_DMAMODE_MSTR_MASK);
+ iowrite8(b, dp->dma_mode);
+
+ b = atp867x_get_active_clocks_shifted(t.active) |
+ atp867x_get_recover_clocks_shifted(t.recover);
+ if (dp->pci66mhz)
+ b += 0x10;
+
+ if (adev->devno & 1)
+ iowrite8(b, dp->slave_piospd);
+ else
+ iowrite8(b, dp->mstr_piospd);
+
+ /*
+ * use the same value for comand timing as for PIO timimg
+ */
+ iowrite8(b, dp->eightb_piospd);
+}
+
+static int atp867x_cable_detect(struct ata_port *ap)
+{
+ return ATA_CBL_PATA40_SHORT;
+}
+
+static struct scsi_host_template atp867x_sht = {
+ ATA_BMDMA_SHT(DRV_NAME),
+};
+
+static struct ata_port_operations atp867x_ops = {
+ .inherits = &ata_bmdma_port_ops,
+ .cable_detect = atp867x_cable_detect,
+ .set_piomode = atp867x_set_piomode,
+ .set_dmamode = atp867x_set_dmamode,
+};
+
+
+#ifdef ATP867X_DEBUG
+static void atp867x_check_res(struct pci_dev *pdev)
+{
+ int i;
+ unsigned long start, len;
+
+ /* Check the PCI resources for this channel are enabled */
+ for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
+ start = pci_resource_start(pdev, i);
+ len = pci_resource_len(pdev, i);
+ printk(KERN_DEBUG "ATP867X: resource start:len=%lx:%lx\n",
+ start, len);
+ }
+}
+
+static void atp867x_check_ports(struct ata_port *ap, int port)
+{
+ struct ata_ioports *ioaddr = &ap->ioaddr;
+ struct atp867x_priv *dp = ap->private_data;
+
+ printk(KERN_DEBUG "ATP867X: port[%d] addresses\n"
+ " cmd_addr =0x%llx, 0x%llx\n"
+ " ctl_addr =0x%llx, 0x%llx\n"
+ " bmdma_addr =0x%llx, 0x%llx\n"
+ " data_addr =0x%llx\n"
+ " error_addr =0x%llx\n"
+ " feature_addr =0x%llx\n"
+ " nsect_addr =0x%llx\n"
+ " lbal_addr =0x%llx\n"
+ " lbam_addr =0x%llx\n"
+ " lbah_addr =0x%llx\n"
+ " device_addr =0x%llx\n"
+ " status_addr =0x%llx\n"
+ " command_addr =0x%llx\n"
+ " dp->dma_mode =0x%llx\n"
+ " dp->mstr_piospd =0x%llx\n"
+ " dp->slave_piospd =0x%llx\n"
+ " dp->eightb_piospd =0x%llx\n"
+ " dp->pci66mhz =0x%lx\n",
+ port,
+ (unsigned long long)ioaddr->cmd_addr,
+ (unsigned long long)ATP867X_IO_PORTBASE(ap, port),
+ (unsigned long long)ioaddr->ctl_addr,
+ (unsigned long long)ATP867X_IO_ALTSTATUS(ap, port),
+ (unsigned long long)ioaddr->bmdma_addr,
+ (unsigned long long)ATP867X_IO_DMABASE(ap, port),
+ (unsigned long long)ioaddr->data_addr,
+ (unsigned long long)ioaddr->error_addr,
+ (unsigned long long)ioaddr->feature_addr,
+ (unsigned long long)ioaddr->nsect_addr,
+ (unsigned long long)ioaddr->lbal_addr,
+ (unsigned long long)ioaddr->lbam_addr,
+ (unsigned long long)ioaddr->lbah_addr,
+ (unsigned long long)ioaddr->device_addr,
+ (unsigned long long)ioaddr->status_addr,
+ (unsigned long long)ioaddr->command_addr,
+ (unsigned long long)dp->dma_mode,
+ (unsigned long long)dp->mstr_piospd,
+ (unsigned long long)dp->slave_piospd,
+ (unsigned long long)dp->eightb_piospd,
+ (unsigned long)dp->pci66mhz);
+}
+#endif
+
+static int atp867x_set_priv(struct ata_port *ap)
+{
+ struct pci_dev *pdev = to_pci_dev(ap->host->dev);
+ struct atp867x_priv *dp;
+ int port = ap->port_no;
+
+ dp = ap->private_data =
+ devm_kzalloc(&pdev->dev, sizeof(*dp), GFP_KERNEL);
+ if (dp == NULL)
+ return -ENOMEM;
+
+ dp->dma_mode = ATP867X_IO_DMAMODE(ap, port);
+ dp->mstr_piospd = ATP867X_IO_MSTRPIOSPD(ap, port);
+ dp->slave_piospd = ATP867X_IO_SLAVPIOSPD(ap, port);
+ dp->eightb_piospd = ATP867X_IO_8BPIOSPD(ap, port);
+
+ dp->pci66mhz =
+ ioread8(ATP867X_SYS_INFO(ap)) & ATP867X_IO_SYS_INFO_66MHZ;
+
+ return 0;
+}
+
+static void atp867x_fixup(struct ata_host *host)
+{
+ struct pci_dev *pdev = to_pci_dev(host->dev);
+ struct ata_port *ap = host->ports[0];
+ int i;
+ u8 v;
+
+ /*
+ * Broken BIOS might not set latency high enough
+ */
+ pci_read_config_byte(pdev, PCI_LATENCY_TIMER, &v);
+ if (v < 0x80) {
+ v = 0x80;
+ pci_write_config_byte(pdev, PCI_LATENCY_TIMER, v);
+ printk(KERN_DEBUG "ATP867X: set latency timer of device %s"
+ " to %d\n", pci_name(pdev), v);
+ }
+
+ /*
+ * init 8bit io ports speed(0aaarrrr) to 43h and
+ * init udma modes of master/slave to 0/0(11h)
+ */
+ for (i = 0; i < ATP867X_NUM_PORTS; i++)
+ iowrite16(ATP867X_IO_PORTSPD_VAL, ATP867X_IO_PORTSPD(ap, i));
+
+ /*
+ * init PreREAD counts
+ */
+ for (i = 0; i < ATP867X_NUM_PORTS; i++)
+ iowrite16(ATP867X_PREREAD_VAL, ATP867X_IO_PREREAD(ap, i));
+
+ v = ioread8(ATP867X_IOBASE(ap) + 0x28);
+ v &= 0xcf; /* Enable INTA#: bit4=0 means enable */
+ v |= 0xc0; /* Enable PCI burst, MRM & not immediate interrupts */
+ iowrite8(v, ATP867X_IOBASE(ap) + 0x28);
+
+ /*
+ * Turn off the over clocked udma5 mode, only for Rev-B
+ */
+ v = ioread8(ATP867X_SYS_INFO(ap));
+ v &= ATP867X_IO_SYS_MASK_RESERVED;
+ if (pdev->device == PCI_DEVICE_ID_ARTOP_ATP867B)
+ v |= ATP867X_IO_SYS_INFO_SLOW_UDMA5;
+ iowrite8(v, ATP867X_SYS_INFO(ap));
+}
+
+static int atp867x_ata_pci_sff_init_host(struct ata_host *host)
+{
+ struct device *gdev = host->dev;
+ struct pci_dev *pdev = to_pci_dev(gdev);
+ unsigned int mask = 0;
+ int i, rc;
+
+ /*
+ * do not map rombase
+ */
+ rc = pcim_iomap_regions(pdev, 1 << ATP867X_BAR_IOBASE, DRV_NAME);
+ if (rc == -EBUSY)
+ pcim_pin_device(pdev);
+ if (rc)
+ return rc;
+ host->iomap = pcim_iomap_table(pdev);
+
+#ifdef ATP867X_DEBUG
+ atp867x_check_res(pdev);
+
+ for (i = 0; i < PCI_ROM_RESOURCE; i++)
+ printk(KERN_DEBUG "ATP867X: iomap[%d]=0x%llx\n", i,
+ (unsigned long long)(host->iomap[i]));
+#endif
+
+ /*
+ * request, iomap BARs and init port addresses accordingly
+ */
+ for (i = 0; i < host->n_ports; i++) {
+ struct ata_port *ap = host->ports[i];
+ struct ata_ioports *ioaddr = &ap->ioaddr;
+
+ ioaddr->cmd_addr = ATP867X_IO_PORTBASE(ap, i);
+ ioaddr->ctl_addr = ioaddr->altstatus_addr
+ = ATP867X_IO_ALTSTATUS(ap, i);
+ ioaddr->bmdma_addr = ATP867X_IO_DMABASE(ap, i);
+
+ ata_sff_std_ports(ioaddr);
+ rc = atp867x_set_priv(ap);
+ if (rc)
+ return rc;
+
+#ifdef ATP867X_DEBUG
+ atp867x_check_ports(ap, i);
+#endif
+ ata_port_desc(ap, "cmd 0x%lx ctl 0x%lx",
+ (unsigned long)ioaddr->cmd_addr,
+ (unsigned long)ioaddr->ctl_addr);
+ ata_port_desc(ap, "bmdma 0x%lx",
+ (unsigned long)ioaddr->bmdma_addr);
+
+ mask |= 1 << i;
+ }
+
+ if (!mask) {
+ dev_printk(KERN_ERR, gdev, "no available native port\n");
+ return -ENODEV;
+ }
+
+ atp867x_fixup(host);
+
+ rc = pci_set_dma_mask(pdev, ATA_DMA_MASK);
+ if (rc)
+ return rc;
+
+ rc = pci_set_consistent_dma_mask(pdev, ATA_DMA_MASK);
+ return rc;
+}
+
+static int atp867x_init_one(struct pci_dev *pdev,
+ const struct pci_device_id *id)
+{
+ static int printed_version;
+ static const struct ata_port_info info_867x = {
+ .flags = ATA_FLAG_SLAVE_POSS,
+ .pio_mask = ATA_PIO4,
+ .mwdma_mask = ATA_MWDMA2,
+ .udma_mask = ATA_UDMA6,
+ .port_ops = &atp867x_ops,
+ };
+
+ struct ata_host *host;
+ const struct ata_port_info *ppi[] = { &info_867x, NULL };
+ int rc;
+
+ if (!printed_version++)
+ dev_printk(KERN_INFO, &pdev->dev, "version " DRV_VERSION "\n");
+
+ rc = pcim_enable_device(pdev);
+ if (rc)
+ return rc;
+
+ printk(KERN_INFO "ATP867X: ATP867 ATA UDMA133 controller (rev %02X)",
+ pdev->device);
+
+ host = ata_host_alloc_pinfo(&pdev->dev, ppi, ATP867X_NUM_PORTS);
+ if (!host) {
+ dev_printk(KERN_ERR, &pdev->dev,
+ "failed to allocate ATA host\n");
+ rc = -ENOMEM;
+ goto err_out;
+ }
+
+ rc = atp867x_ata_pci_sff_init_host(host);
+ if (rc) {
+ dev_printk(KERN_ERR, &pdev->dev, "failed to init host\n");
+ goto err_out;
+ }
+
+ pci_set_master(pdev);
+
+ rc = ata_host_activate(host, pdev->irq, ata_sff_interrupt,
+ IRQF_SHARED, &atp867x_sht);
+ if (rc)
+ dev_printk(KERN_ERR, &pdev->dev, "failed to activate host\n");
+
+err_out:
+ return rc;
+}
+
+static struct pci_device_id atp867x_pci_tbl[] = {
+ { PCI_VDEVICE(ARTOP, PCI_DEVICE_ID_ARTOP_ATP867A), 0 },
+ { PCI_VDEVICE(ARTOP, PCI_DEVICE_ID_ARTOP_ATP867B), 0 },
+ { },
+};
+
+static struct pci_driver atp867x_driver = {
+ .name = DRV_NAME,
+ .id_table = atp867x_pci_tbl,
+ .probe = atp867x_init_one,
+ .remove = ata_pci_remove_one,
+};
+
+static int __init atp867x_init(void)
+{
+ return pci_register_driver(&atp867x_driver);
+}
+
+static void __exit atp867x_exit(void)
+{
+ pci_unregister_driver(&atp867x_driver);
+}
+
+MODULE_AUTHOR("John(Jung-Ik) Lee, Google Inc.");
+MODULE_DESCRIPTION("low level driver for Artop/Acard 867x ATA controller");
+MODULE_LICENSE("GPL");
+MODULE_DEVICE_TABLE(pci, atp867x_pci_tbl);
+MODULE_VERSION(DRV_VERSION);
+
+module_init(atp867x_init);
+module_exit(atp867x_exit);
projects / GitHub / moto-9609 / android_kernel_motorola_exynos9610.git / commitdiff